JP7850050B2 - Building insulation renovation plan generation system, generation method, and program - Google Patents

Description

This invention relates to a system for generating building insulation renovation plans, etc.

In recent years, various insulation renovations have been carried out to improve the thermal insulation of all or part of existing buildings (see, for example, Patent Document 1 below).

Japanese Patent Publication No. 2020-166483

Generally, insulation renovations require a renovation plan. This plan involves, for example, provisionally determining the insulation renovation specifications, such as building materials, based on the user's budget, and then evaluating whether the insulation performance after renovation meets predetermined standards. However, since the provisional determination of insulation renovation specifications and the evaluation of insulation performance are repeated until certain standards are met, generating an insulation renovation plan is a time-consuming process.

This invention was devised in view of the above-described circumstances, and its primary objective is to provide a system that can easily generate insulation renovation plans.

The present invention relates to a system for generating an insulation renovation plan for a building having one or more spaces, comprising: a first input unit that selects at least one space to be insulated from the spaces of the building and inputs a first insulation performance, which is the current insulation performance of the space; a second input unit that inputs a second insulation performance, which is the target insulation performance of the space after the insulation renovation; a calculation unit that calculates a target heat loss reduction amount, which is the amount of heat loss reduction that the space should achieve through the insulation renovation, based on the difference between the first and second insulation performance; and a predetermined multiple of the building materials that constitute the space, including at least one of the ceiling, exterior wall, floor, and opening. This building insulation renovation plan generation system includes: a specification storage unit that stores data on a number of insulation renovation specifications, the cost of each of the multiple insulation renovation specifications, and the amount of heat loss reduction for each of the multiple insulation renovation specifications; a selection unit that selects at least one insulation renovation specification from the specification storage unit that achieves the target amount of heat loss reduction and satisfies predetermined cost conditions; and an output unit that outputs at least one of the selected insulation renovation specifications, the total amount of heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications to a display device.

By adopting the above configuration, the building insulation renovation plan generation system of the present invention makes it possible to easily generate insulation renovation plans.

This is a cross-sectional view showing the building of this embodiment. This is a block diagram of the building insulation renovation plan generation system of this embodiment. This figure shows data related to the specifications for thermal insulation renovations in this embodiment. This figure shows the data regarding the height of the space in this embodiment. This flowchart shows the processing procedure for generating a building insulation renovation plan according to this embodiment. This is a flowchart showing the processing procedure for the first thermal insulation performance input step of this embodiment. This figure shows a screen for inputting basic information about the building in this embodiment. This flowchart shows the processing procedure for the selection step in this embodiment. This data shows the cost and heat loss reduction for each insulation renovation specification. This figure shows the screen of the display device according to this embodiment. This flowchart shows an example of the processing procedure for the selection step in another embodiment of the present invention. This data shows the cost and the increase in operating temperature for each insulation renovation specification in other embodiments of the present invention.

The embodiments of the present invention will be described below with reference to the drawings. It should be understood that the drawings contain exaggerations and representations that differ from the actual structural dimensional ratios, in order to aid in understanding the content of the invention. Furthermore, the same or common elements are denoted by the same reference numerals throughout each embodiment, and redundant explanations are omitted. Moreover, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the content of the present invention, and the present invention is not limited to the specific configurations shown in the illustrations.

In this embodiment, the building insulation renovation plan generation system (hereinafter sometimes simply referred to as the "generation system") generates a building insulation renovation plan.

[building]
Figure 1 is a cross-sectional view showing building 1 of this embodiment. In this embodiment, building 1 is exemplified as a house, but it may also be a building such as a commercial building. Furthermore, building 1 of this embodiment is configured as an industrialized house. However, building 1 is not limited to an industrialized house as in this embodiment.

The building 1 of this embodiment has one or more spaces 2. The building 1 of this embodiment has multiple spaces 2, including a space 2A on the first floor, a space 2B on the second floor, and an inter-floor space 2C. These spaces 2 are composed (partitioned) by building materials 3, which include, for example, a ceiling 4, an exterior wall 5, a floor (first-floor floor) 6, and at least one of an opening 7. These building materials 3 constitute the building envelope 8, which forms the thermal boundary of the building 1.

As in this embodiment, the building materials 3 used in industrialized housing are mainly produced in factories based on predetermined specifications. Therefore, in this embodiment, the building 1 has predetermined heights H1 to H3 (vertical modules) of the space 2 and initial insulation specifications for the building materials 3. Furthermore, in this embodiment, the horizontal dimensions of the space 2 and the spacing (span) between adjacent horizontal columns (not shown) are set (designed) for the building 1 and building materials 3 based on predetermined horizontal modules (architectural modules).

The spatial heights H1 to H3 (vertical modules) and the initial insulation specifications for building material 3 are set for each industrialized housing specification (product). The specifications of this embodiment include, for example, three products (product A, product B, and product C), but are not limited to this configuration. Building 1 (industrialized housing) in this embodiment is configured as product A.

[Building insulation renovation plan generation system (first embodiment)]
Figure 2 is a block diagram of the building insulation renovation plan generation system 11 of this embodiment. The generation system 11 of this embodiment is used to execute the building insulation renovation plan generation method (hereinafter sometimes simply referred to as the "generation method") described later.

The generation system 11 of this embodiment is configured by, for example, a computer 12. Examples of the computer 12 include desktop computers, notebook computers, tablet computers, smartphones, and cloud servers. In this embodiment, for example, a tablet computer or a notebook computer is used as the computer 12.

The generation system 11 of this embodiment is configured to include, for example, an input device 13, a display device 14, and a processing unit 15.

[Input devices and display devices]
The input device 13 may include, for example, a touch panel, a keyboard, and a mouse. The display device 14 may include, for example, a display. This display may be a touch panel display integrated with the touch panel of the input device 13.

[Arithmetic Processing Unit]
The arithmetic processing unit 15 of this embodiment is configured to include, for example, an arithmetic unit (CPU) 16 that performs various calculations, a storage unit 17 that stores data, programs, etc., and a working memory 18.

[Storage]
The storage unit 17 is a non-volatile information storage device, such as a magnetic disk, optical disk, or SSD. The storage unit 17 in this embodiment includes a data unit 19 and a program unit 20.

[Data Department]
The data unit 19 is for storing data (information) necessary for analyzing the motion of an object, as well as analysis results. In this embodiment, the data unit 19 includes a basic information storage unit 19a, a first thermal insulation performance storage unit 19b, a second thermal insulation performance storage unit 19c, a reduction amount storage unit 19d, a selection storage unit 19e, and a specification storage unit 19f. However, the data unit 19 is not limited to this configuration, and some of these may be omitted, or it may include, for example, a storage unit (not shown) capable of storing other data. Details of the data input to these data units 19 will be described later, with the exception of the specification storage unit 19f.

The specification storage unit 19f stores data related to a predetermined number of insulation renovation specifications for the building material 3 (shown in Figure 1). Figure 3 is a diagram showing the data related to insulation renovation specifications in this embodiment. In Figure 3, the insulation renovation specifications for product A of the multiple specifications for industrialized housing (in this example, products A to C) are shown as representative. In this embodiment, different insulation renovation specifications are set for products A to C, but they may be common to products A to C.

The specification storage unit 19f (shown in Figure 2) of this embodiment stores data for multiple insulation renovation specifications 21 for each building material 3 (in this example, the ceiling 4, exterior wall 5, floor 6, and opening 7). The data for the multiple insulation renovation specifications 21 includes data for the first insulation renovation specification 21a, the second insulation renovation specification 21b, and the third insulation renovation specification 21c. Note that the insulation renovation specifications 21 are not limited to these forms; some may be omitted, or other insulation renovation specifications (not shown) may be included.

The first insulation renovation specification 21a, the second insulation renovation specification 21b, and the third insulation renovation specification 21c differ from each other in the specifications of the insulation material used in each building material 3 (ceiling 4, exterior wall 5, floor 6) and the specifications of the double-glazed glass used in the openings 7. Therefore, the insulation performance after renovation differs for each of the three insulation renovation specifications 21a, 21b, and 21c.

The specification storage unit 19f (shown in Figure 2) of this embodiment further stores data related to heat loss reduction and cost for each of the multiple insulation renovation specifications 21a to 21c.

In this embodiment, the thermal transmittance (U-value) 23a is shown as data related to the reduction in heat loss. The thermal transmittance 23a (W/ ^m² ·K) is an indicator of how easily heat is transferred, and the smaller the value, the higher the insulation performance. In this embodiment, among the multiple insulation renovation specifications 21a to 21c, the thermal transmittance 23a of the first insulation renovation specification 21a is set to be the largest, and the thermal transmittance 23a of the third insulation renovation specification 21c is set to be the smallest. That is, the insulation performance of the first insulation renovation specification 21a is set to be the lowest, and the insulation performance of the third insulation renovation specification 21c is set to be the highest. When the area of each building material 3 is multiplied by the thermal transmittance 23a of these insulation renovation specifications 21a to 21c, the amount of heat loss reduction (W/K) when the insulation renovation specification 21 is applied to each building material 3 can be determined.

The cost data for this embodiment shows the cost (yen/ ^m² ) 23b required for insulation renovation per unit area of building material 3. The cost 23b per unit area in this embodiment includes the material costs (including the cost of insulation material) and construction costs (including labor costs) required for insulation renovation. In this embodiment, for each building material 3, the cost 23b per unit area for the first insulation renovation specification 21a is set to be the lowest, and the cost 23b per unit area for the third insulation renovation specification 21c is set to be the highest. By multiplying the cost 23b per unit area of these insulation renovation specifications 21a to 21c by the area of each building material 3, the cost when the insulation renovation specification 21 is applied to each building material 3 can be determined.

In this embodiment, the specification storage unit 19f (shown in Figure 2) further stores data regarding the initial insulation specifications 22 for the building materials 3 (in this example, the ceiling 4, exterior wall 5, floor 6, and opening 7). In this embodiment, data regarding the amount of heat loss reduction of the initial insulation specifications 22 and data regarding the cost of the initial insulation specifications are further stored. For the data regarding the amount of heat loss reduction, the thermal transmittance (U-value) 23a of each building material 3 before (currently) insulation renovation is set. On the other hand, for the data regarding cost, the cost per unit area 23b is shown, and 0 (yen/ ^m² ) is set for each.

The specification storage unit 19f (shown in Figure 2) of this embodiment stores data related to the heights H1 to H3 of space 2. Figure 4 shows the data related to the heights H1 to H3 of space 2 in this embodiment. In this embodiment, the heights of space 2 shown in Figure 1 are stored as follows: height H1 of space 2A on the first floor, height H2 of space 2B on the second floor, and height H3 of the space between floors 2C. These heights H1 to H3 are stored for each specification of the industrialized housing (in this example, product A to product C). Note that the data related to the heights H1 to H3 of space 2 is not limited to this configuration and is set according to the number of floors and specifications of building 1 shown in Figure 1.

[Programming Department]
As shown in Figure 2, the program unit 20 is a program (computer program) necessary for analyzing the motion of an object. The program unit (program) 20 is executed by the calculation unit 16, thereby enabling the computer 12 to function as a specific means.

The program unit 20 of this embodiment includes a first input unit 20a, a second input unit 20b, a third input unit 20c, a calculation unit 20d, a selection unit 20e, and an output unit 20f. Note that the program unit 20 is not limited to this configuration; some of these components may be omitted, or other program units with different functions may be included. Details of the functions of these program units 20 will be described later.

[Method for generating a building insulation renovation plan (First Embodiment)]
Next, the generation method of this embodiment will be described. Figure 5 is a flowchart showing the processing steps of the generation method of this embodiment. Each step of the generation method of this embodiment is performed by the generation system (computer 12) shown in Figure 2.

[Input the current first thermal insulation performance (first thermal insulation performance input process)]
In the generation method of this embodiment, first, at least one target space 25 for insulation renovation is selected from the spaces 2 of the building 1 shown in Figure 1, and the first insulation performance, which is the current insulation performance of the target space 25, is input (first insulation performance input step S1). The first insulation performance is not particularly limited as long as it represents the current insulation performance of the target space 25. In this embodiment, the current average heat transfer coefficient (UA value) of the building envelope of the target space 25 is calculated as the first insulation performance.

In the first thermal insulation performance input step S1 of this embodiment, first, data related to thermal insulation renovation specifications (shown in Figure 3) and data related to the height of the space 2 (shown in Figure 4), stored in the specification storage unit 19f shown in Figure 2, are loaded into the working memory 18. Furthermore, the first input unit 20a and the third input unit 20c included in the program unit 20 are loaded into the working memory 18.

The first input unit 20a is a program for inputting the current thermal insulation performance of the target space 25, which is the first thermal insulation performance. When this first input unit 20a is executed by the calculation unit 16, the computer 12 can function as a means for inputting the first thermal insulation performance.

The third input unit 20c is a program for inputting the perimeter length and opening area of the target space 25. By executing this third input unit 20c by the calculation unit 16, the computer 12 can function as a means for inputting the perimeter length and opening area. Figure 6 is a flowchart showing the processing procedure of the first thermal insulation performance input step S1 in this embodiment.

[Enter data related to the basic information of the building]
In the first thermal insulation performance input step S1 of this embodiment, data relating to the basic information of the building 1 (shown in Figure 1) is first input (step S11). In this embodiment, the third input unit 20c (shown in Figure 2) enables the input of data relating to the basic information of the building 1 (shown in Figure 1) (including the outer perimeter length and opening area of the target space 25). Figure 7 shows a screen 30 for inputting the basic information of the building 1 in this embodiment.

In this embodiment, basic information for building 1 (shown in Figure 1) is input, such as the building location 26, product name 27, number of floors 28, and entrance direction 29. The building location 26 includes the prefecture name 26a, the city/town name 26b, and the regional classification 26c. In this embodiment, the regional classification 26c is a division of cities and towns nationwide into multiple regions, using outside air conditions as the evaluation axis. In this embodiment, the regional classification 26c is selected from eight regions (regional classifications 1 to 8) divided according to residential energy conservation standards (e.g., the 2016 energy conservation standards). The product name 27 is selected from the specifications of industrialized housing (in this example, products A to C). Data related to this basic information is stored in the basic information storage unit 19a (shown in Figure 2).

[Select the space to be insulated for renovation]
Next, in the first thermal insulation performance input step S1 of this embodiment, at least one target space 25 for thermal insulation renovation is selected from the spaces 2 of the building 1 shown in Figure 1 (step S12). In this embodiment, the input of the target space 25 for thermal insulation renovation is made possible by executing the third input unit 20c shown in Figure 2.

The target space 25 for insulation renovation is appropriately selected from the spaces 2 of building 1 shown in Figure 1. In this embodiment, all spaces 2 of building 1 are selected and entered into the screen 30 shown in Figure 7. The selected target space 25 is stored in the basic information storage unit 19a (shown in Figure 2).

[Enter the perimeter length and opening area]
Next, in the first thermal insulation performance input step S1 of this embodiment, the outer perimeter length and opening area of the target space 25 for thermal insulation renovation shown in Figure 1 are input (step S13). In this embodiment, the input of the outer perimeter length and opening area is made possible by executing the third input unit 20c shown in Figure 2.

The perimeter length of the target space 25 shown in Figure 1 is entered as appropriate. For example, the perimeter length may be a value obtained by actually measuring the target space 25. As described above, in the building 1 of this embodiment, the spacing (span) between a pair of adjacent columns in the horizontal direction (not shown) is determined based on the horizontal module. Therefore, by inputting the number of spans in the target space 25, the perimeter length can be automatically calculated without actually measuring the target space 25.

In the screen 30 of Figure 7, the number of spans 33 in the target space 25 is entered. In this embodiment, the number of spans 33 includes the number of east-west spans 33a and the number of north-south spans 33b. The perimeter length can be calculated by multiplying the sum of these span numbers by the distance per span. In this embodiment, if the target space 25 is all the spaces 2 of building 1, the total number of spans of building 1 is entered separately for east-west and north-south. This allows the total perimeter length of building 1 to be calculated.

The opening area is entered as appropriate. For example, the opening area may be the measured value of the opening 7 provided in the target space 25 shown in Figure 1. In the case of an industrialized housing, as in building 1 of this embodiment, the openings 7 to be installed in building 1 are selected from predetermined types (specifications). Each type has a defined opening area. Therefore, by entering the number 34 of the types of openings 7 provided in the target space 25 on screen 30 of Figure 7, the total opening area (sum of the opening areas of each opening 7 provided in the target space 25) can be automatically calculated. In this embodiment, the number 34 of the types of openings 7 is entered as the number 34a of the types on the first floor and the number 34b of the types on the second floor, but this is not the only way; the number of types for all floors may be entered at once. The perimeter length and opening area of the target space 25 are stored in the basic information storage unit 19a (shown in Figure 2).

[Calculate the surface area of the target space]
Next, in the first thermal insulation performance input step S1 of this embodiment, the envelope area of the target space 25 is calculated (step S14). In this embodiment, step S14 is made possible by the execution of the first input unit 20a shown in Figure 2, which enables the calculation of the envelope area.

The outer surface area can be calculated as appropriate. In this embodiment, the outer surface area is calculated based on the height H of the target space 25 shown in Figure 1, the outer perimeter length, and the opening area. The outer perimeter length and opening area are obtained from data input to the basic information storage unit 19a (shown in Figure 2) in step S13.

In step S14 of this embodiment, the height H of the target space 25 is obtained from the data relating to the space height shown in Figure 4. In the case of an industrialized housing unit of product A, such as building 1 in this embodiment, the data relating to the space heights H1 to H3 of product A is identified from the data relating to the space heights H1 to H3 shown in Figure 4.

In this embodiment, when the target space 25 is all the spaces 2 of building 1, the following data regarding the height of the space of product A are obtained: the height of the first floor H1 (2.4 m in this example), the height of the second floor H2 (2.4 m in this example), and the height between floors H3 (0.2 m in this example). Then, by adding these heights H1, H2, and H3 together, the height H of the target space 25 (all the spaces of building 1) shown in Figure 1 is determined.

Next, in step S14 of this embodiment, the height H of the target space 25 for insulation renovation is multiplied by the perimeter length, and the opening area is further reduced. This calculates the area of the exterior wall 5 of the target space 25. Furthermore, the areas of the ceiling 4 and floor 6 of the target space 25 can be calculated, for example, from the number of east-west spans 33a and the number of north-south spans 33b shown in Figure 7.

Next, in step S14 of this embodiment, the areas of the ceiling 4, exterior wall 5, and floor 6 of the target space 25 are added together with the opening area of the opening 7. This determines the exterior area of the target space 25 (250 m2 in this example). The exterior area 40 is displayed as a representative on the screen 30 shown in Figure 7. The exterior area 40, along with the areas of the ceiling 4, exterior wall 5, and floor 6, are stored in the basic information storage unit 19a (shown in Figure 2).

[Calculate the first level of thermal insulation performance]
Next, in the first thermal insulation performance input step S1 of this embodiment, the first thermal insulation performance, which is the current thermal insulation performance of the target space 25, is calculated based on the envelope area 40 of the target space 25 (shown in Figure 7) and the initial thermal insulation specifications 22 (shown in Figure 3) (step S15). In this embodiment, step S15 is made possible by the execution of the first input unit 20a shown in Figure 2, which enables the calculation of the first thermal insulation performance.

As described above, the first thermal insulation performance in this embodiment is calculated based on the current average heat transfer coefficient (UA value) of the building envelope of the target space 25. The average heat transfer coefficient (UA value) is obtained by dividing the total amount of heat lost by the target space 25 by the area of the building envelope of the target space 25.

The total amount of heat lost by the target space 25 is obtained as appropriate. In this embodiment, when the target space 25 is composed of building materials 3 including the ceiling 4, exterior wall 5, floor 6, and opening 7, the heat loss from the ceiling 4, the heat loss from the exterior wall 5, the heat loss from the floor 6, and the heat loss from the opening 7 are added together. This allows the total amount of heat lost by the target space 25 to be obtained.

The heat loss of ceiling 4 is obtained by multiplying the thermal transmittance (U-value) of ceiling 4 by the area of ceiling 4. The thermal transmittance (U-value) of ceiling 4 used is the ceiling's thermal transmittance (U-value) 23a included in the data related to the initial insulation specification 22 shown in Figure 3. The area of ceiling 4 used is the area of ceiling 4 input into the basic information storage unit 19a (shown in Figure 2) in process S14.

The heat loss of the exterior wall 5 is obtained by multiplying the thermal transmittance (U-value) of the exterior wall 5 by the area of the exterior wall 5. The thermal transmittance (U-value) of the exterior wall 5 used is the thermal transmittance (U-value) 23a of the exterior wall included in the data related to the initial insulation specification 22 shown in Figure 3. The area of the exterior wall 5 used is the area of the exterior wall 5 input into the basic information storage unit 19a (shown in Figure 2) in process S14.

The heat loss of floor 6 is obtained by multiplying the thermal transmittance (U-value) of floor 6, the area of floor 6, and a coefficient. The thermal transmittance (U-value) of floor 6 used is the floor's thermal transmittance (U-value) 23a included in the data related to the initial insulation specification 22 shown in Figure 3. The area of floor 6 used is the area of floor 6 input into the basic information storage unit 19a (shown in Figure 2) in process S14. The coefficient is set as appropriate. In this embodiment, when the thermal transmittance and area of floor 6 are used to calculate the heat loss of floor 6, a coefficient of 0.7 is used. On the other hand, when the thermal transmittance and area of the foundation 9 shown in Figure 1 are used instead of the thermal transmittance and area of floor 6, a coefficient of 1.0 is used.

The heat loss through the opening 7 is obtained by multiplying the thermal transmittance (U-value) of the opening 7 by the opening area. The thermal transmittance (U-value) of the opening 7 used is the opening's thermal transmittance (U-value) 23a included in the data related to the initial insulation specification 22 shown in Figure 3. The opening area used is the opening area input into the basic information storage unit 19a (shown in Figure 2) in step S14.

In step S15 of this embodiment, the total amount of heat lost by the target space 25 is obtained by summing the heat loss from the ceiling 4, the heat loss from the outer wall 5, the heat loss from the floor 6, and the heat loss from the opening 7. This total amount of heat lost by the target space 25 is divided by the surface area 40 of the target space 25 (shown in Figure 7), which was input into the basic information storage unit 19a (shown in Figure 2) in step S14. This calculates the current average thermal transmittance of the target space 25 (1.27 W/ ^m² ·K in this example). The current average thermal transmittance (UA value) of the target space 25 is stored as the first thermal insulation performance in the first thermal insulation performance storage unit 19b (shown in Figure 2). The first thermal insulation performance 41 is displayed on the screen 30 shown in Figure 7.

[Enter the second level of insulation performance after the insulation renovation]
Next, in the generation method of this embodiment, the second thermal insulation performance, which is the target thermal insulation performance after thermal insulation renovation of the target space 25 shown in Figure 1, is input (step S2).

In step S2 of this embodiment, the second input unit 20b shown in Figure 2 is loaded into the working memory 18. The second input unit 20b is a program for inputting the second thermal insulation performance. By executing this second input unit 20b by the calculation unit 16, the computer 12 can be made to function as a means for inputting the second thermal insulation performance.

The second thermal insulation performance is set as appropriate, as long as it is the thermal insulation performance that is desired to be achieved after the thermal insulation renovation of the target space 25. In this embodiment, the second thermal insulation performance is set, for example, based on the average heat transfer coefficient (UA value) that the target space 25 should achieve, according to energy conservation standards. For example, if the 2016 energy conservation standards are applied, the standard value of the average heat transfer coefficient set for each regional classification (regions 1 to 8) is set as the second thermal insulation performance. The relationship between these regional classifications and standard values may be pre-stored in the data unit 19 shown in Figure 2.

As in this embodiment, when "6" is entered in the regional classification 26c of the screen 30 shown in Figure 7, "0.87 (W/ ^m² ·K)" is set as the second thermal insulation performance (average heat transfer coefficient of the building envelope). In this embodiment, the second thermal insulation performance 42 is displayed on the screen 30 shown in Figure 7. The second thermal insulation performance is stored in the second thermal insulation performance storage unit 19c (shown in Figure 2).

[Calculate target heat loss reduction]
Next, in the generation method of this embodiment, the target heat loss reduction amount, which is the amount of heat loss reduction that the target space 25 should achieve through insulation renovation, is calculated based on the difference between the first insulation performance and the second insulation performance (step S3).

In step S3 of this embodiment, the first thermal insulation performance 41 (shown in Figure 7), which is input to the first thermal insulation performance storage unit 19b shown in Figure 2, and the second thermal insulation performance 42 (shown in Figure 7), which is input to the second thermal insulation performance storage unit 19c, are loaded into the working memory 18. Furthermore, in step S3, the calculation unit 20d included in the program unit 20 is loaded into the working memory 18. The calculation unit 20d is a program for calculating the target heat loss reduction amount. By executing this calculation unit 20d by the arithmetic unit 16, the computer 12 can function as a means for calculating the target heat loss reduction amount.

The target heat loss reduction is calculated as appropriate. In this embodiment, the first insulation performance 41 shown in Figure 7 is reduced by the second insulation performance 42. That is, for the target space 25 for insulation renovation, the difference between the current average heat transfer coefficient of the building envelope (1.27 (W/ ^m² ·K) in this example) and the target average heat transfer coefficient of the building envelope to be achieved by the energy conservation standard (0.87 (W/ ^m² ·K) in this example) is calculated. By multiplying this difference in building envelope heat transfer coefficient (0.40 (W/ ^m² ·K) in this example) by the area of the building envelope 40 of the target space 25 (250 m² in this example), the target heat loss reduction (100 (W/K) in this example) is calculated.

The target heat loss reduction amount in this embodiment is the amount of heat loss reduction that should be achieved by applying one of the insulation renovation specifications 21a to 21c shown in Figure 3 to at least one building material 3 constituting the target space 25 shown in Figure 1. The target heat loss reduction amount is stored in the reduction amount storage unit 19d (shown in Figure 2). The target heat loss reduction amount 46 is displayed on the screen 30 shown in Figure 7.

[Select insulation renovation specifications (selection process)]
Next, in the generation method of this embodiment, at least one insulation renovation specification 21a to 21c is selected from the specification storage unit 19f shown in Figure 2 that achieves the target heat loss reduction amount 46 (shown in Figure 7) and satisfies predetermined cost conditions (selection step S4). The cost conditions are set as appropriate, for example, according to the requests of the homeowner of the insulation renovation. In this embodiment, the cost conditions are set to the condition that minimizes the total cost of the selected insulation renovation specifications 21. In this embodiment, the selection step S4 is started by pressing the button 47 shown in Figure 7, but the embodiment is not limited to this.

In the selection step S4 of this embodiment, first, data related to multiple insulation renovation specifications 21 input into the specification storage unit 19f (shown in Figure 2) (shown in Figure 3), and the target heat loss reduction amount 46 input into the reduction amount storage unit 19d (shown in Figure 7) are loaded into the working memory 18. Furthermore, the selection unit 20e included in the program unit 20 is loaded into the working memory 18. The selection unit 20e is a program for selecting insulation renovation specifications. By executing this selection unit 20e by the calculation unit 16, the computer 12 can function as a means for selecting insulation renovation specifications. Figure 8 is a flowchart showing the processing procedure of the selection step S4 of this embodiment.

[Calculate the cost and heat loss reduction of insulation renovations]
In the selection step S4 of this embodiment, first, the cost and heat loss reduction amount are calculated for each of the multiple insulation renovation specifications shown in Figure 3 (in this example, the first insulation renovation specification 21a to the third insulation renovation specification 21c) that make up the target space 25 for insulation renovation shown in Figure 1 (step S41). Figure 9 shows the data for the cost and heat loss reduction amount for each insulation renovation specification 21a to 21c.

Figure 9 shows the area 45 of each building material 3. These areas 45 use the areas (not shown) of the ceiling 4, exterior wall 5, floor 6, and opening 7 that were input into the basic information storage unit 19a (shown in Figure 2) in process S14. Furthermore, Figure 9 shows the cost 43a, heat loss reduction amount 43b, and 1 W/K reduction cost 43c, cost increment 43d, and heat loss reduction increment 43e when the insulation renovation specifications 21 (in this example, the first insulation renovation specification 21a to the third insulation renovation specification 21c) are applied.

In Figure 9, the cost 43a when the first insulation renovation specification 21a is applied is calculated for each building material 3 by multiplying the cost per unit area 23b (yen/ ^m² ) of the first insulation renovation specification shown in Figure 3 by the area 45 shown in Figure 9. On the other hand, the heat loss reduction 43b when the first insulation renovation specification 21a is applied is calculated for each building material 3 by multiplying the difference between the heat transfer coefficient (U-value) 23a of the initial insulation specification 22 shown in Figure 3 and the heat transfer coefficient (U-value) 23a of the first insulation renovation specification 21a by the area 45 shown in Figure 9.

In Figure 9, the cost increment 43d for the second insulation renovation specification 21b represents the increment from the cost 43a of the first insulation renovation specification 21a. This increment 43d is calculated for each building material 3 by subtracting the cost per unit area of the first insulation renovation specification 21a from the cost per unit area of the second insulation renovation specification 21b shown in Figure 3, and then multiplying this result by the area 45 shown in Figure 9. Adding the cost 43a of the first insulation renovation specification 21a to this increment 43d gives the cost when the second insulation renovation specification 21b is applied.

In Figure 9, the increment value 43e of the heat loss reduction for the second insulation renovation specification 21b represents the increment value from the heat loss reduction 43b of the first insulation renovation specification 21a. This increment value 43e is calculated by multiplying the difference between the thermal transmittance (U-value) 23a of the first insulation renovation specification 21a and the thermal transmittance (U-value) 23a of the second insulation renovation specification 21b (shown in Figure 3) by the area 45 shown in Figure 9. By adding the heat loss reduction 43b of the first insulation renovation specification 21a to this increment value 43e, the heat loss reduction when the second insulation renovation specification 21b is applied can be determined.

In Figure 9, the cost increment 43d for the third insulation renovation specification 21c represents the increment from the cost of the second insulation renovation specification 21b. This increment 43d is calculated by subtracting the cost per unit area of the second insulation renovation specification 21b from the cost per unit area of the third insulation renovation specification 21c (shown in Figure 3) for each building material 3, and then multiplying this result by the area 45 shown in Figure 9. The cost when the third insulation renovation specification 21c is applied is then calculated by adding the cost 43a of the first insulation renovation specification 21a and the cost increment 43d of the second insulation renovation specification 21b to this increment 43d.

In Figure 9, the increment value 43e of the heat loss reduction for the third insulation renovation specification 21c represents the increment from the heat loss reduction for the second insulation renovation specification 21b. This increment value is calculated by multiplying the difference between the thermal transmittance (U-value) 23a of the second insulation renovation specification 21b and the thermal transmittance (U-value) 23a of the third insulation renovation specification 21c (shown in Figure 3) for each building material 3 by the area 45 shown in Figure 9. By adding this increment value 43e to the heat loss reduction amount 43b for the first insulation renovation specification 21a and the increment value 43d for the heat loss reduction amount of the second insulation renovation specification 21b, the heat loss reduction amount when the third insulation renovation specification 21c is applied can be determined.

In Figure 9, the 1 W/K reduction cost 43c represents the cost required per unit heat loss reduction (1 W/K). In the first insulation renovation specification 21a, the 1 W/K reduction cost 43c is obtained by dividing cost 43a by the heat loss reduction amount 43b. This 1 W/K reduction cost 43c for the first insulation renovation specification 21a represents the increase in cost-effectiveness compared to the initial insulation specification 22.

In the second insulation renovation specification 21b, the cost increment 43d is divided by the heat loss reduction increment 43e to obtain a 1 W/K reduction cost 43c. This 1 W/K reduction cost 43c in the second insulation renovation specification 21b represents the increase in cost-effectiveness compared to the first insulation renovation specification 21a.

In the third insulation renovation specification 21c, the cost increment 43d is divided by the heat loss reduction increment 43e to obtain a 1 W/K reduction cost 43c. This 1 W/K reduction cost 43c in the third insulation renovation specification 21c represents the increase in cost-effectiveness compared to the second insulation renovation specification 21b.

[Select insulation renovation specifications]
Next, in the selection step S4 of this embodiment, at least one insulation renovation specification 21 is selected that achieves the target heat loss reduction amount 46 (shown in Figure 7) and satisfies predetermined cost conditions (step S42). In this embodiment, one of the first insulation renovation specification 21a to the third insulation renovation specification 21c is selected for at least one building material 3 that constitutes the target space 25 for insulation renovation. At this time, the insulation renovation specification is selected such that the total heat loss reduction amount is 46 or more (100 (W/K) in this example) and the total cost satisfies the cost condition (in this example, the condition for the lowest cost).

In step S42 of this embodiment, first, among the multiple building materials 3 (ceiling 4, exterior wall 5, floor 6, and opening 7) shown in Figure 9, the first insulation renovation specification 21a with the highest cost-effectiveness (i.e., the smallest 1W/K reduction cost 43c) is selected.

Regarding the 1W/K reduction cost 43c in this embodiment, the first insulation renovation specification 21a for the ceiling 4 costs 20,000 yen, and the first insulation renovation specification 21a for the exterior wall 5 costs 30,000 yen. Furthermore, the first insulation renovation specification 21a for the floor 6 costs 15,000 yen, and the first insulation renovation specification 21a for the opening 7 costs 8,100 yen. Of these insulation renovation specifications 21, the first insulation renovation specification 21a for the opening 7 has the smallest 1W/K reduction cost 43c. Therefore, the first insulation renovation specification 21a for the opening 7 is selected.

In the first insulation renovation specification 21a for the selected opening 7, the heat loss reduction 43b is 37.2 W/K, which does not achieve the target heat loss reduction 46 (100 W/K) shown in Figure 7. Therefore, to achieve the target heat loss reduction 46, it is possible to either upgrade the first insulation renovation specification 21a for the opening 7 to the second insulation renovation specification 21b, or to newly select the first insulation renovation specification 21a for the building materials 3 other than the opening 7 (ceiling 4, exterior wall 5, and floor 6) along with the first insulation renovation specification 21a for the opening 7.

Next, in step S42 of this embodiment, as shown in Figure 9, either an upgrade of the insulation renovation specification 21 for the selected building material 3, or a new selection of the first insulation renovation specification 21a for the building material 3 that has not yet been selected, is carried out. In this embodiment, among the second insulation renovation specification 21b for the opening 7 and the first insulation renovation specification 21a for the building materials 3 other than the opening 7 (ceiling 4, exterior wall 5, and floor 6), the insulation renovation specification 21 that is most cost-effective (i.e., has the smallest 1W/K reduction cost 43c) is selected.

Regarding the 1W/K reduction cost 43c in this embodiment, the second insulation renovation specification 21b for the opening 7 costs 0.86 million yen. On the other hand, the first insulation renovation specification 21a for the ceiling 4 costs 2.0 million yen, the first insulation renovation specification 21a for the exterior wall 5 costs 3.0 million yen, and the first insulation renovation specification 21a for the floor 6 costs 1.5 million yen. Of these insulation renovation specifications 21, the second insulation renovation specification 21b for the opening 7 has the smallest 1W/K reduction cost 43c. Therefore, the first insulation renovation specification 21a for the opening 7 is upgraded to the second insulation renovation specification 21b.

The heat loss reduction for the second insulation renovation specification 21b of opening 7 is obtained by adding the incremental value 43e (23.2 W/K) of the heat loss reduction for the second insulation renovation specification 21b to the heat loss reduction 43b (37.2 W/K) of the first insulation renovation specification 21a. This heat loss reduction (60.4 W/K) does not meet the target heat loss reduction 46 (100 W/K) shown in Figure 7. Therefore, it is possible to either upgrade the second insulation renovation specification 21b of opening 7 to the third insulation renovation specification 21c, or to newly select the first insulation renovation specification 21a for the building materials 3 other than opening 7 (ceiling 4, exterior wall 5, and floor 6).

Next, in step S42 of this embodiment, as shown in Figure 9, either an upgrade of the insulation renovation specification 21 of the selected building material 3, or a new selection of the first insulation renovation specification 21a for the building material 3 that has not yet been selected, is carried out. In this embodiment, among the third insulation renovation specification 21c for the opening 7 and the first insulation renovation specification 21a for the building materials 3 other than the opening 7 (ceiling 4, exterior wall 5, and floor 6), the insulation renovation specification that is most cost-effective (i.e., the one with the smallest 1W/K reduction cost 43c) is selected.

Regarding the 1W/K reduction cost 43c in this embodiment, the third insulation renovation specification 21c for the opening 7 costs 0.86 million yen. On the other hand, the first insulation renovation specification 21a for the ceiling 4 costs 2.0 million yen, the first insulation renovation specification 21a for the exterior wall 5 costs 3.0 million yen, and the first insulation renovation specification 21a for the floor 6 costs 1.5 million yen. Of these insulation renovation specifications 21, the third insulation renovation specification 21c for the opening 7 has the smallest 1W/K reduction cost 43c. Therefore, the second insulation renovation specification 21b for the opening 7 is upgraded to the third insulation renovation specification 21c.

The heat loss reduction for the third insulation renovation specification 21c of opening 7 is obtained by adding the heat loss reduction of the second insulation renovation specification (60.4 W/K) and the incremental value 43e (23.2 W/K) of the heat loss reduction of the third insulation renovation specification. This heat loss reduction (83.6 W/K) does not meet the target heat loss reduction 46 (100 W/K) shown in Figure 7. Furthermore, since the applicable insulation renovation specification 21 for opening 7 is limited to the third insulation renovation specification 21c, an upgrade from the third insulation renovation specification 21c is not possible. Therefore, it is conceivable to newly select the first renovation specification 41a for building materials 3 other than opening 7 (ceiling 4, exterior wall 5, and floor 6).

Next, in step S42 of this embodiment, the first renovation specification 41a for the ceiling 4, exterior wall 5, or floor 6 is selected in Figure 9. In this embodiment, among the first insulation renovation specifications 21a for the ceiling 4, exterior wall 5, and floor 6, the insulation renovation specification 21 with the highest cost-effectiveness (the lowest 1W/K reduction cost) is selected.

Regarding the 1W/K reduction cost 43c in this embodiment, the first insulation renovation specification 21a for the ceiling 4 costs 20,000 yen, the first insulation renovation specification 21a for the exterior wall 5 costs 30,000 yen, and the first insulation renovation specification 21a for the floor 6 costs 15,000 yen. Of these insulation renovation specifications, the first insulation renovation specification 21a for the floor 6 has the smallest 1W/K reduction cost. Therefore, the first insulation renovation specification 21a for the floor 6 is newly selected (added).

The heat loss reduction from the third insulation renovation specification 21c of opening 7 is 83.6 W/K, as described above. The heat loss reduction 43b from the first insulation renovation specification 21a of floor 6 is 12.0 W/K. The total heat loss reduction, when these reductions are added together, is 95.6 W/K, which falls short of the target heat loss reduction 46 (100 W/K) shown in Figure 7. Therefore, to achieve the target heat loss reduction 46, it is advisable to either upgrade the first insulation renovation specification 21a of floor 6 to the second insulation renovation specification 21b, or to newly select the first insulation renovation specification 21a for ceiling 4 or exterior wall 5.

Next, in step S42 of this embodiment, as shown in Figure 9, either an upgrade of the insulation renovation specification 21 of the selected building material 3, or a new selection of the first insulation renovation specification 21a for the building material 3 that has not yet been selected, is carried out. In this embodiment, among the second insulation renovation specification 21b for the floor 6 and the first insulation renovation specification 21a for the ceiling 4 and exterior wall 5, the insulation renovation specification 21 that offers the highest cost-effectiveness (the lowest 1W/K reduction cost) is selected.

Regarding the 1W/K reduction cost 43c in this embodiment, the second insulation renovation specification 21b for the floor 6 costs 25,000 yen, the first insulation renovation specification 21a for the ceiling 4 costs 20,000 yen, and the first insulation renovation specification 21a for the exterior wall 5 costs 30,000 yen. Of these insulation renovation specifications, the first insulation renovation specification 21a for the ceiling 4 has the smallest 1W/K reduction cost. Therefore, the first insulation renovation specification 21a for the ceiling 4 is newly selected (added).

As described above, the heat loss reduction amount for the third insulation renovation specification 21c of the opening 7 is 83.6 W/K, and the heat loss reduction amount 43b for the first insulation renovation specification 21a of the floor 6 is 12.0 W/K. Furthermore, the heat loss reduction amount 43b for the first insulation renovation specification 21a of the ceiling 4 is 6.0 W/K. The total heat loss reduction amount, calculated by adding these amounts together, is 101.6 W/K, achieving the target heat loss reduction amount (100 W/K) shown in Figure 7. Therefore, in step S42 of this embodiment, the third insulation renovation specification 21c of the opening 7, the first insulation renovation specification 21a of the floor 6, and the first insulation renovation specification 21a of the ceiling 4 are selected as the insulation renovation specifications 21 to be applied to the target space 25 for insulation renovation.

In this embodiment, among the selectable insulation renovation specifications 21, the one with the highest cost-effectiveness (i.e., the lowest 1 W/K reduction cost 43c) is sequentially selected. This allows for the selection of insulation renovation specifications 21 that can achieve the target heat loss reduction amount 46 (shown in Figure 7) while satisfying the cost condition that minimizes the total cost of the selected insulation renovation specifications 21.

The cost of the third insulation renovation specification 21c for opening 7 is obtained by adding the cost of the first insulation renovation specification 21a for opening 7 (43a, 300,000 yen), the increment value of the second insulation renovation specification 21b (43d, 200,000 yen), and the increment value of the third insulation renovation specification 21c (43d, 200,000 yen) (700,000 yen). The cost of the first insulation renovation specification 21a for floor 6 (43a) is 180,000 yen. The cost of the first insulation renovation specification 21a for ceiling 4 (43a) is 120,000 yen. Adding these costs together, the total cost of the selected insulation renovation specification 21 is 1,000,000 yen.

In step S42, the selected insulation renovation specifications 21 (in this example, the third insulation renovation specification 21c for the opening 7, the first insulation renovation specification 21a for the floor 6, and the first insulation renovation specification 21a for the ceiling 4) are stored in the selection storage unit 19e shown in Figure 2. Furthermore, the total heat loss reduction (101.6 W/K) and the total cost (1 million yen) are also stored in the selection storage unit 19e (shown in Figure 2).

[Output selected insulation renovation specifications to the display device]
Next, in the generation method of this embodiment, at least one of the selected insulation renovation specifications 21, the total heat loss reduction amount obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications 21, and the total cost of the selected insulation renovation specifications 21 is output to the display device 14 (shown in Figure 2) (step S5).

In step S5 of this embodiment, the insulation renovation specifications 21 (in this example, the third insulation renovation specification 21c for the opening 7, the first insulation renovation specification 21a for the floor 6, and the first insulation renovation specification 21a for the ceiling 4) input to the selection storage unit 19e shown in Figure 2 are loaded into the working memory 18. Furthermore, the total heat loss reduction amount and the total cost input to the selection storage unit 19e are also loaded into the working memory 18.

Next, in step S5 of this embodiment, the output unit 20f included in the program unit 20 is loaded into the working memory 18. The output unit 20f is a program for outputting at least one of the selected insulation renovation specifications 21, the total heat loss reduction amount, and the total cost to the display device 14. By executing this output unit 20f by the calculation unit 16, the computer 12 can function as a means for outputting the above-mentioned selected insulation renovation specifications 21, etc., to the display device 14. Figure 10 shows the screen 30 of the display device 14 in this embodiment.

The display device 14 of this embodiment outputs the following basic information: regional classification 26c, product name 27, and exterior area 40. The regional classification 26c, product name 27, and exterior area 40 are obtained from the basic information storage unit 19a shown in Figure 2.

In this embodiment, the display device 14 outputs the insulation specifications 36 (initial insulation specifications 22) and thermal transmittance 37 for each building material 3 before insulation renovation. The insulation specifications 36 are obtained from the data related to the initial insulation specifications 22 shown in Figure 3. In this embodiment, the insulation specifications 36 output for each building material 3 include the specifications of the insulation material corresponding to the initial insulation specifications 22 (e.g., thickness) and the specifications of the double-glazed glass, but the embodiment is not limited to this configuration. Furthermore, the thermal transmittance 37 is obtained from the data related to the heat loss reduction amount (thermal transmittance 23a) of the initial insulation specifications 22 shown in Figure 3.

In this embodiment, the display device 14 outputs the insulation specifications 38 (insulation renovation specifications 21) and thermal transmittance 39 for each building material 3 after insulation renovation. The insulation specifications 38 (insulation renovation specifications 21) output is the insulation renovation specifications 21 selected in selection step S4. In this embodiment, the insulation specifications 38 output for each building material 3 includes specifications of the insulation material (e.g., thickness) and specifications of the double-glazed glass, corresponding to the first insulation renovation specifications 21a to the third insulation renovation specifications 21c.

For building materials 3 (exterior wall 5 in this example) where the insulation renovation specification 21 is not selected, "No Change" is output, for example, but the output is not limited to this configuration. Furthermore, the thermal transmittance 39 is the thermal transmittance 23a of the selected insulation renovation specification 21, out of the data (thermal transmittance 23a) related to the heat loss reduction amount of the multiple insulation renovation specifications 21a to 21c shown in Figure 3.

In this embodiment, the specifications of the insulation material (e.g., thickness) and the specifications of the double-glazed windows are output for both the insulation specification 36 before the insulation renovation and the insulation specification 38 after the insulation renovation. This makes it easier for salespeople to explain to clients the changes in the insulation material specifications resulting from the renovation. Note that the output is not limited to the specifications of the insulation material; for example, names indicating the grades of the first insulation renovation specification 21a to the third insulation renovation specification 21c may also be output.

The display device 14 of this embodiment outputs the total heat loss reduction amount 51, the total cost 52, the average heat transfer coefficient of the building envelope before insulation renovation 53, and the average heat transfer coefficient of the building envelope after insulation renovation 54. The average heat transfer coefficient of the building envelope before insulation renovation 53 is the current average heat transfer coefficient (UA value) input to the first insulation performance storage unit 19b shown in Figure 2. The average heat transfer coefficient of the building envelope after insulation renovation 54 is obtained by subtracting the current average heat transfer coefficient of the building envelope 53 by the value obtained by dividing the total heat loss reduction amount 51 by the building envelope area 40. By outputting these values to the display device 14, it becomes easier for salespeople to explain to clients the insulation performance that can be improved by the selected insulation renovation specification 21 (insulation renovation plan) (e.g., total heat loss reduction amount 51), the total cost 52 required for insulation renovation, and whether the energy-saving performance after insulation renovation is sufficient.

Thus, in this embodiment's generation method (generation system 11), at least one insulation renovation specification 21 is selected from the specification storage unit 19f shown in Figure 2 that achieves the target heat loss reduction amount 46 shown in Figure 7 and satisfies predetermined cost conditions. This eliminates the need to repeatedly perform preliminary determination of the insulation renovation specification 21 and evaluation of the insulation performance after renovation until certain criteria are met, as was done in the conventional method. Therefore, the generation method (generation system 11) makes it possible to easily generate insulation renovation plans.

Furthermore, in this embodiment's generation method (generation system 11), the insulation renovation specification 21 is selected under the condition that minimizes the total cost 52, making it possible to create the most cost-effective insulation renovation plan.

Furthermore, in the generation method (generation system 11) of this embodiment, the current first thermal insulation performance 41 (shown in Figure 7) is calculated by inputting the perimeter length (number of spans 33 shown in Figure 7) and opening area (number of types of openings 7 34 shown in Figure 7) for the target space 25 for thermal insulation renovation. In addition, the target heat loss reduction amount 46 (shown in Figure 7) and the total cost 52 (shown in Figure 10) are calculated based on the area (including opening area) 45 of each building material 3 shown in Figure 9 and the predetermined thermal insulation renovation specifications 21. Therefore, it is possible to create a thermal insulation renovation plan without requiring specialized knowledge.

In step S5 of this embodiment, data (not shown) regarding utility costs after insulation renovation may be further output. In this case, it is preferable that utility costs before and after the insulation renovation are output. This makes it easier, for example, for salespeople to explain the cost benefits of insulation renovation to clients. Utility costs can be easily calculated, for example, by converting primary energy consumption data obtainable by known methods.

[Determine if the criteria are met]
Next, in the generation method of this embodiment, it is determined whether the total cost 52 (shown in Figure 10) of the selected insulation renovation specifications 21 satisfies a predetermined standard (step S6). In step S6 of this embodiment, if the amount of the total cost 52 is less than a predetermined threshold (amount), it is determined that the total cost 52 satisfies the standard. Such a determination may be made by the computer 12 (generation system 11) shown in Figure 2, or by the client, etc. The threshold is determined, for example, according to the client's budget.

In step S6, if the total cost 52 satisfies the criteria ("Yes" in step S6), the insulation renovation is carried out based on the selected insulation renovation specifications 21 (step S7). In this embodiment, since the insulation renovation specifications 21 are specified by creating the insulation renovation plan, ordering from the factory and arranging for construction contractors can be carried out smoothly.

On the other hand, if the total cost 52 in process S6 does not meet the criteria ("No" in process S6), for example, the target heat loss reduction amount 46 shown in Figure 7 is changed (process S8), and selection processes S4 to S6 are repeated. This makes it possible to select an insulation renovation specification 21 (creation of an insulation renovation plan) that achieves the target heat loss reduction amount 46 and satisfies the predetermined cost conditions, according to the client's requests.

[Building Insulation Renovation Plan Generation System and Generation Method (Second Embodiment)]
In the generation system (generation method) of the previous embodiment, the cost condition was set to the condition that minimizes the total cost 52 (shown in Figure 10) of the selected insulation renovation specification 21 (minimum cost), but the system is not limited to this configuration. For example, the cost condition may be set to the condition that the total cost 52 is lower than the allowable cost, which is the sum of the minimum cost required to achieve the target heat loss reduction amount 46 shown in Figure 7 and the allowable incremental cost from the minimum cost. This makes it possible to change from the insulation renovation specification selected under the condition that minimizes the total cost 52 to an insulation renovation specification 21 that can further improve insulation performance within the range of the allowable cost (i.e., total cost 52 + incremental cost). Therefore, it becomes possible to generate an insulation renovation plan that can improve comfort.

The incremental cost can be set as appropriate. For example, the incremental cost can be set according to the client's budget, and could be set at, for instance, 200,000 yen.

[Building Insulation Renovation Plan Generation System and Generation Method (Third Embodiment)]
In the selection step S4 of the previous embodiment, an insulation renovation specification 21 was selected that achieved the target heat loss reduction amount 46 (shown in Figure 7) and satisfied the cost condition, but the embodiment is not limited to this. For example, in the selection step S4, an insulation renovation specification 21 may be selected to satisfy other conditions as well. In this embodiment, the insulation renovation specification 21 is selected so as to achieve the target heat loss reduction amount 46, satisfy the cost condition, and maximize the total increase in the working temperature of the space 25 to be insulated.

[Select insulation renovation specifications (selection process)]
Figure 11 is a flowchart showing an example of the processing procedure for selection step S4 in another embodiment of the present invention. In selection step S4 of this embodiment, the increase in operating temperature is calculated for each building material 3 constituting the target space 25 for insulation renovation when one of the multiple insulation renovation specifications 21 (in this example, the first insulation renovation specification 21a to the third insulation renovation specification 21c) is applied (step S43).

Figure 12 shows data illustrating the cost 43a and the increase in operating temperature 43f for each insulation renovation specification 21 of another embodiment of the present invention. Figure 12 includes the area 45, cost 43a, cost increment 43d, and 1 W/K reduction cost 43c of each building material 3 shown in Figure 9, as well as the increase in operating temperature 43f.

The effective temperature is one of the indicators used to evaluate the thermal environment for the human body. A higher effective temperature indicates greater comfort. The effective temperature is obtained using the following formula (1).
Working temperature = (indoor temperature + average surface temperature) ÷ 2...(1)

In the above equation (1), the operating temperature is obtained by adding the indoor temperature and the average surface temperature and dividing by 2. In this embodiment, the indoor temperature is set to the indoor temperature of the target space 25 for insulation renovation (for example, 20°C). The average surface temperature is set to the average value of the surface temperatures of each building material 3 (ceiling 4, exterior wall 5, floor 6 and opening 7) that make up the target space 25. The average surface temperature is obtained by the following equation (2).
Average surface temperature = Σ (Surface temperature of each building material × Exterior surface area) ÷ Total exterior surface area ... (2)

In equation (2) above, first, the surface temperature and the surface area (i.e., the area 45 of each building material 3 shown in Figure 9) are multiplied for each building material 3 (ceiling 4, exterior wall 5, floor 6, and opening 7). Then, these multiplied values are summed up and divided by the total surface area of all building materials (i.e., the surface area 40 shown in Figure 7) to obtain the average surface temperature.

The surface temperature of each building material 3 (ceiling 4, exterior wall 5, floor 6, and opening 7) is obtained using the following formula (3).
Surface temperature = Indoor temperature - (Indoor temperature - Outdoor temperature) × Indoor surface heat transfer resistance × Heat transfer coefficient ... (3)

In the above equation (3), the indoor temperature and outdoor temperature are set as appropriate. In this embodiment, the indoor temperature is set to 20°C and the outdoor temperature is set to 0°C. The thermal transmittance (U-value) used is the data (thermal transmittance (U-value) 23a) related to the amount of heat loss reduction for the multiple insulation renovation specifications 21a to 21c shown in Figure 3. The indoor surface heat transfer resistance is set as appropriate according to the building material 3. In this embodiment, the indoor surface heat transfer resistance is set to the following value.
Ceiling: 0.09m ^2K /W
Outer wall: 0.11m ²・K/W
Opening: 0.11m ²・K/W
Floor: 0.15m ²・K/W

The above-mentioned indoor surface heat transfer resistance and thermal transmittance 23a are stored in the specification storage unit 19f shown in Figure 2 as data relating to the temperature rise for each of the multiple insulation renovation specifications 21a to 21c.

In Figure 12, the increase in operating temperature 43f for the first insulation renovation specification 21a represents the increase (increment) in operating temperature from the initial insulation specification 22 (shown in Figure 3) for each building material 3. This increase 43f is obtained for each building material 3 by subtracting the operating temperature of the initial insulation specification 22 from the operating temperature of the first insulation renovation specification 21a.

In Figure 12, the increase in operating temperature 43f for the second insulation renovation specification 21b represents the increase (increment) in operating temperature from the first insulation renovation specification 21a for each building material 3. This increase 43f is calculated for each building material 3 by subtracting the operating temperature of the first insulation renovation specification 21a from the operating temperature of the second insulation renovation specification 21b. By adding this increase 43f to the increase in operating temperature 43f for the first insulation renovation specification 21a, the increase in operating temperature when the second insulation renovation specification 21b is applied can be determined.

In Figure 12, the increase in operating temperature 43f for the third insulation renovation specification 21c represents the increase (increment) in operating temperature from the second insulation renovation specification 21b for each building material 3. This increase 43f is calculated for each building material 3 by subtracting the operating temperature of the second insulation renovation specification 21b from the operating temperature of the third insulation renovation specification 21c. By adding the increase in operating temperature 43f for the first insulation renovation specification 21a and the increase in operating temperature 43f for the second insulation renovation specification 21b to this increase 43f, the increase in operating temperature when the third insulation renovation specification 21c is applied can be determined.

[Select insulation renovation specifications]
Next, in the selection step S4 of this embodiment, at least one insulation renovation specification 21 is selected (step S44) such that the target heat loss reduction amount 46 shown in Figure 7 is achieved, the predetermined cost conditions are met, and the total value of the increase in operating temperature 43f shown in Figure 12 is maximized. In step S44 of this embodiment, as in previous embodiments, one of the first insulation renovation specification 21a to the third insulation renovation specification 21c is selected for at least one building material 3 that constitutes the space 25 to be insulated.

In step S44 of this embodiment, first, as in previous embodiments, the insulation renovation specifications 21 are selected such that the total amount of heat loss reduction is equal to or greater than the target heat loss reduction of 46 (100 (W/K)), and the total cost satisfies the cost condition (the condition for the lowest cost). In this case, the third insulation renovation specification 21c for the opening 7, the first insulation renovation specification 21a for the floor 6, and the first insulation renovation specification 21a for the ceiling 4 are selected, and the total cost (minimum cost) becomes 1 million yen.

Next, in step S44 of this embodiment, the insulation renovation specification 21 is selected such that the total value of the temperature rise 43f is maximized, under the condition that the total cost is lower than the allowable cost. The allowable cost in this embodiment is set to 1.2 million yen, which is the sum of the minimum cost of 1 million yen and the incremental cost (200,000 yen in this example).

In this embodiment, the current total cost is 1 million yen. Therefore, under a constraint of 200,000 yen, it is possible to select the first insulation renovation specification 21a for the building material 3 that has not yet been selected, or to upgrade the insulation renovation specification 21.

In this embodiment, it is conceivable to select the first insulation renovation specification 21a for the exterior wall 5 to increase the operating temperature by +0.05°C. However, the cost required for this selection (300,000 yen) exceeds the constraint of 200,000 yen, making it impossible to select the first insulation renovation specification 21a for the exterior wall 5. On the other hand, it is also conceivable to upgrade the ceiling 4 and floor 6 from the first insulation renovation specification to the second insulation renovation specification, but the cost required for these selections also exceeds the constraint. Therefore, in this embodiment, the first insulation renovation specification 21a for the ceiling 4, which was the last to be selected (added), is temporarily canceled, and then the selection of the first insulation renovation specification 21a for the unselected building material 3, or the upgrade of the insulation renovation specification 21 for the already selected building material 3, is considered.

In this embodiment, canceling the first insulation renovation specification 21a for the ceiling 4 results in a total cost of 880,000 yen. Therefore, under the constraint of 320,000 yen, it becomes possible to select a new first insulation renovation specification 21a for building material 3 that has not yet been selected, or to upgrade the insulation renovation specification 21 for building material 3 that has already been selected.

In this embodiment, either the floor 6 is upgraded from the first insulation renovation specification 21a to the second insulation renovation specification 21b, or a new selection of the first insulation renovation specification 21a for a building material 3 (ceiling 4 or exterior wall 5) that has not yet been selected is implemented. Regarding the increase in operating temperature 43f in this embodiment, the second insulation renovation specification 21b for the floor 6 is "+0.07°C", the first insulation renovation specification 21a for the ceiling 4 is "+0.02°C", and the first insulation renovation specification 21a for the exterior wall 5 is "+0.05°C". Of these insulation renovation specifications 21, the increase in operating temperature 43f for the second insulation renovation specification 21b for the floor 6 is the largest, and the total increase in operating temperature 43f can be maximized.

If the second insulation renovation specification 21b for floor 6 is selected, the total increase in operating temperature is +0.53°C. Furthermore, the cost required for selecting the second insulation renovation specification 21b for floor 6 is 300,000 yen, satisfying the aforementioned constraint of 320,000 yen.

As shown in Figure 9, the heat loss reduction of the selected floor 6 under the second insulation renovation specification 21b is obtained by adding the increment value 43e (12.0 W/K) of the heat loss reduction of the second insulation renovation specification 21b to the heat loss reduction 43b (12.0 W/K) of the first insulation renovation specification 21a. As mentioned above, the heat loss reduction of the already selected opening 7 under the third insulation renovation specification 21c is 83.6 W/K. The total heat loss reduction, obtained by summing these heat loss reductions, is 107.6 W/K, achieving the target heat loss reduction (100 W/K). Therefore, in the selection step S4 of this embodiment, the first insulation renovation specification 21a of the floor 6 is upgraded to the second insulation renovation specification 21b.

Thus, in this embodiment, the insulation renovation specification 21 is selected so that the total value of the temperature rise 43f is maximized, making it possible to create an insulation renovation plan that can further enhance comfort. Furthermore, in this embodiment, the insulation renovation specification 21 can be changed to one that can further enhance insulation performance within the allowable cost range, making it possible to create an insulation renovation plan that can further enhance comfort.

In step S5 of this embodiment, the total value of the temperature rise 43f may be output to the display device 14 shown in Figure 10. This makes it easier for salespeople to explain to clients the improved comfort resulting from the insulation renovation.

Although particularly preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments and can be implemented in various modified forms.

[Note]
The present invention includes the following embodiments.

[Invention 1]
A system for generating insulation renovation plans for buildings having one or more spaces,
A first input unit selects at least one space to be insulated from the spaces of the building and inputs a first insulation performance, which is the current insulation performance of the space to be insulated.
A second input unit inputs the second thermal insulation performance, which is the target thermal insulation performance after the thermal insulation renovation of the aforementioned target space,
A calculation unit that calculates a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A specification storage unit stores data relating to a set of predetermined insulation renovation specifications, the cost of each of the insulation renovation specifications, and the amount of heat loss reduction for each of the insulation renovation specifications, for building materials including at least one of the ceiling, exterior walls, floor, and openings that constitute the target space.
A selection unit selects from the specification storage unit at least one insulation renovation specification that achieves the target heat loss reduction and satisfies predetermined cost conditions,
The system includes an output unit that outputs to a display device at least one of the selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications.
A system for generating building insulation renovation plans.
[Invention 2]
The building insulation renovation plan generation system according to the present invention 1, wherein the specification storage unit stores the data for the ceiling, the exterior wall, the floor, and the openings.
[3 of the present invention]
The aforementioned cost condition is the condition that minimizes the total cost, in the building insulation renovation plan generation system according to invention 1 or 2.
[4th Invention]
The building insulation renovation plan generation system according to invention 1 or 2, wherein the cost condition is that the total cost is lower than the allowable cost obtained by adding the minimum cost required to achieve the target heat loss reduction amount and the allowable incremental cost from the minimum cost.
[5th Invention]
The specification storage unit further stores data relating to the increase in operating temperature for each of the multiple insulation renovation specifications.
The building insulation renovation plan generation system according to any one of inventions 1 to 4, wherein the selection unit selects at least one insulation renovation specification from the specification storage unit such that the target heat loss reduction amount is achieved, the cost conditions are met, and the total value of the increase in the operating temperature is maximized.
[Invention 6]
The aforementioned building is an industrialized house in which the height of the space and the initial insulation specifications of the building materials are predetermined.
The system further includes a third input unit for inputting the outer perimeter length and opening area of the target space,
The first input unit calculates the first thermal insulation performance based on the exterior surface area, which can be determined by the height, perimeter length, and opening area of the target space, and the initial thermal insulation specifications, in a building thermal insulation renovation plan generation system according to any one of inventions 1 to 5.
[7th Invention]
The aforementioned output unit further outputs data relating to energy costs after insulation renovation, further comprising the building insulation renovation plan generation system according to any one of inventions 1 to 6.
[8th Invention]
A method for generating an insulation renovation plan for a building having one or more spaces,
The process involves selecting at least one space to be insulated from the spaces of the building, and inputting the current insulation performance of the space, which is the first insulation performance, into a computer.
The process includes inputting the second thermal insulation performance, which is the target thermal insulation performance after thermal insulation renovation of the target space, into the computer.
The aforementioned computer,
A step of calculating a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A step of selecting at least one insulation renovation specification that achieves the target heat loss reduction amount and satisfies predetermined cost conditions from a specification storage unit that stores data on a predetermined number of insulation renovation specifications, the cost of each of the predetermined number of insulation renovation specifications, and the amount of heat loss reduction for each of the predetermined number of insulation renovation specifications, for building materials including at least one of the ceiling, exterior wall, floor, and opening that constitute the target space,
The process involves outputting to a display device at least one of the selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications.
Method for generating building insulation renovation plans.
[Invention 9]
A computer program for generating insulation renovation plans for buildings having one or more spaces,
Computers,
A means for selecting at least one space to be insulated from the space of the building and inputting a first insulation performance, which is the current insulation performance of the space to be insulated,
A means for inputting the second insulation performance, which is the target insulation performance after the insulation renovation of the aforementioned target space,
A means for calculating a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A means for selecting at least one insulation renovation specification that achieves the target heat loss reduction and satisfies predetermined cost conditions from a specification storage unit that stores data on a predetermined number of insulation renovation specifications, the cost of each of the multiple insulation renovation specifications, and the amount of heat loss reduction for each of the multiple insulation renovation specifications, for building materials including at least one of the ceiling, exterior wall, floor, and opening that constitute the target space,
The selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications are to be used as means for outputting at least one of these to a display device.
Computer program.

11. Building insulation renovation plan generation system 14. Display device 19f. Specification storage unit 20a. First input unit 20b. Second input unit 20d. Calculation unit 20e. Selection unit 20f. Output unit.

Claims (9)

A system for generating insulation renovation plans for buildings having one or more spaces,
A first input unit selects at least one space to be insulated from the spaces of the building and inputs a first insulation performance, which is the current insulation performance of the space to be insulated.
A second input unit inputs the second thermal insulation performance, which is the target thermal insulation performance after the thermal insulation renovation of the aforementioned target space,
A calculation unit that calculates a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A specification storage unit stores data relating to a set of predetermined insulation renovation specifications, the cost of each of the insulation renovation specifications, and the amount of heat loss reduction for each of the insulation renovation specifications, for building materials including at least one of the ceiling, exterior walls, floor, and openings that constitute the target space.
A selection unit selects one of the multiple insulation renovation specifications for at least one of the building materials from the specification storage unit so as to achieve the target heat loss reduction and satisfy predetermined cost conditions,
The system includes an output unit that outputs to a display device at least one of the selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications.
A system for generating building insulation renovation plans.
The building insulation renovation plan generation system according to claim 1, wherein the specification storage unit stores the data for multiple ceilings, exterior walls, floors, and openings. The building insulation renovation plan generation system according to claim 1 or 2, wherein the cost condition is the condition that minimizes the total cost. The building insulation renovation plan generation system according to claim 1 or 2, wherein the cost condition is such that the total cost is lower than the allowable cost obtained by adding the minimum cost required to achieve the target heat loss reduction amount and the allowable incremental cost from the minimum cost. The specification storage unit further stores data relating to the increase in operating temperature for each of the multiple insulation renovation specifications.
The building insulation renovation plan generation system according to claim 1 or 2, wherein the selection unit selects one of the plurality of insulation renovation specifications from the specification storage unit for at least one of the building materials such that the target heat loss reduction amount is achieved, the cost condition is met, and the total value of the increase in the operating temperature is maximized.
The aforementioned building is an industrialized house in which the height of the space and the initial insulation specifications of the building materials are predetermined.
The system further includes a third input unit for inputting the outer perimeter length and opening area of the target space,
The building insulation renovation plan generation system according to claim 1 or 2, wherein the first input unit calculates the first insulation performance based on the exterior area, which can be determined by the height, perimeter length, and opening area of the target space, and the initial insulation specifications. The building insulation renovation plan generation system according to claim 1 or 2, wherein the output unit further outputs data regarding energy costs after insulation renovation. A method for generating an insulation renovation plan for a building having one or more spaces,
The process involves selecting at least one space to be insulated from the spaces of the building, and inputting the current insulation performance of the space, which is the first insulation performance, into a computer.
The process includes inputting the second thermal insulation performance, which is the target thermal insulation performance after thermal insulation renovation of the target space, into the computer.
The aforementioned computer,
A step of calculating a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A step of selecting one of the multiple insulation renovation specifications for at least one of the building materials, including the ceiling, exterior wall, floor, and openings that constitute the target space, from a specification storage unit that stores data on a predetermined number of insulation renovation specifications, the cost of each of the multiple insulation renovation specifications, and the amount of heat loss reduction for each of the multiple insulation renovation specifications, in order to achieve the target amount of heat loss reduction and satisfy the predetermined cost conditions.
The process involves outputting to a display device at least one of the selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications.
Method for generating building insulation renovation plans.
A computer program for generating insulation renovation plans for buildings having one or more spaces,
Computers,
A means for selecting at least one space to be insulated from the space of the building and inputting a first insulation performance, which is the current insulation performance of the space to be insulated,
A means for inputting the second insulation performance, which is the target insulation performance after the insulation renovation of the aforementioned target space,
A means for calculating a target heat loss reduction amount, which is the amount of heat loss reduction that the target space should achieve through insulation renovation, based on the difference between the first insulation performance and the second insulation performance,
A means for selecting one of the multiple insulation renovation specifications for at least one of the building materials, including the ceiling, exterior wall, floor, and openings that constitute the target space, from a specification storage unit that stores data on a predetermined number of insulation renovation specifications, the cost of each of the multiple insulation renovation specifications, and the amount of heat loss reduction for each of the multiple insulation renovation specifications, such that the target amount of heat loss reduction is achieved and predetermined cost conditions are met.
The selected insulation renovation specifications, the total heat loss reduction obtained by summing the heat loss reduction amounts of the selected insulation renovation specifications, and the total cost of the selected insulation renovation specifications are to be used as means for outputting at least one of these to a display device.
Computer program.