JP5922907B2 - Air conditioning heat consumption evaluation apparatus and method - Google Patents

Description

  The present invention relates to an air conditioning heat consumption evaluation apparatus and method for detecting waste of heat consumption of air conditioning.

  Conventionally, an energy monitoring system has been proposed as means for grasping the energy usage status and realizing energy saving (see Patent Document 1). The energy monitoring system disclosed in Patent Document 1 monitors the energy usage of electric power, gas, and fuel oil used in a building or factory, and determines the operation schedule, load factor, and set temperature in the building or factory. By simulating energy usage data by setting operating conditions arbitrarily, and comparing simulation results with actual data on energy usage, we will try to grasp the room for energy saving and how to improve energy usage. To do.

  In addition, as another means for realizing energy saving, a building energy saving evaluation monitoring apparatus that centrally manages and analyzes energy consumption of a plurality of buildings has been proposed (see Patent Document 2). The building energy-saving evaluation and monitoring device disclosed in Patent Document 2 calculates the reference energy consumption from past data based on the outside air temperature, room temperature, and the energy consumption data of the equipment installed in the building. When the ratio of the actual measured value of energy consumption to the consumption is above a specified level, it is determined that the system is abnormal, and when a system abnormality is detected, each process value (measurement data) deviates significantly from the past average value. What takes the value is extracted as an abnormal data item.

JP 2002-259508 A Japanese Patent No. 4334176

  The energy monitoring system disclosed in Patent Document 1 can detect wasteful consumption of heat and can identify factors that consume a lot of energy. However, it requires qualitative information such as building attributes, and a large amount of input data. And the setting information is necessary, there is a problem that the application target is limited.

  In addition, the building energy saving evaluation and monitoring device disclosed in Patent Document 2 can detect waste of heat consumption without using qualitative information such as building attributes, but waste detection is limited to an increase from the past. In addition, there is a problem that it is not possible to specify the factor of high energy consumption. That is, since the reference energy consumption in Patent Document 2 is not necessarily an imaginary energy consumption, it is difficult to extract a large room for energy reduction in the determination using the reference energy consumption. In addition, the abnormal data item in Patent Document 2 merely indicates that there is a deviation from the past average value, and it is not always possible to identify the cause of the problem of high energy consumption.

  The present invention has been made to solve the above-mentioned problems, and can detect wasteful consumption of heat without using qualitative information such as building attributes, and can identify a factor of high energy consumption. An object is to provide an air conditioning heat consumption evaluation apparatus and method.

  The air-conditioning heat consumption evaluation apparatus of the present invention includes an air-conditioning heat consumption measuring unit that measures or calculates air-conditioning heat consumption, an outside air enthalpy measurement unit that measures or calculates outside air enthalpy, and an air conditioner that is measured or calculated by the air-conditioning heat consumption measuring unit. With respect to the data stored in the first storage means, the first storage means that stores the heat consumption and the outside air enthalpy measured or calculated by the outside air enthalpy measurement means in association with each other, the outside air enthalpy is taken as one axis, Based on the approximate straight line or the inflection point calculated by the approximate straight line calculating means and the approximate straight line calculating means for calculating the approximate straight line of the data and the inflection point of the approximate curved line when the air conditioning heat consumption is taken on the other axis , Heat consumption consumption extraction means to extract the state of heat consumption that consumes more heat than the ideal amount, and the amount of heat for each heat consumption state A second storage means for preliminarily storing consumption factor information; and a heat quantity consumption factor specifying means for specifying a factor of heat consumption based on the information stored in the second storage means. It is what.

Moreover, in one structural example of the air-conditioning heat consumption evaluation apparatus of the present invention, the approximate line calculating means includes an inflection point searching means for searching for an inflection point of the approximate curve, and an approximate curve deriving means for obtaining the approximate curve. The inflection point search means searches for a first inflection point for air conditioning heat consumption data related to cold water in a region where the outside air enthalpy is equal to or greater than a predetermined value α, and the outside air enthalpy is the first inflection point. The second inflection point is searched for the data of the air conditioning consumption heat amount related to the cold water in the region below the enthalpy of the inflection point, and if the first and second inflection points do not exist, the air conditioning consumption heat amount related to the cold water. The approximate curve deriving means calculates an approximate straight line for the air conditioning consumption heat amount data related to hot water in a region where the outside air enthalpy is equal to or less than a predetermined value β. When the first inflection point exists, an approximate straight line is calculated for the air-conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or greater than the enthalpy of the first inflection point, and the first inflection point is If there is no second inflection point, an approximate straight line is calculated for the air-conditioning heat consumption data related to cold water in an area where the outside air enthalpy is less than or equal to the enthalpy of the first inflection point, and the first inflection point is calculated. When there is a second inflection point, an approximate straight line with respect to the air conditioning heat consumption data related to cold water in the region where the outside enthalpy is greater than or equal to the enthalpy of the second inflection point and less than or equal to the enthalpy of the first inflection point And an approximate straight line is calculated for the air-conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or less than the enthalpy of the second inflection point, and the first and second inflection points exist. In the case where the third inflection point exists, an approximate straight line is calculated for the air-conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or larger than the enthalpy of the third inflection point, and the outside air enthalpy is When an approximate straight line is calculated for the air conditioning heat consumption data related to the cold water in the region below the enthalpy of the third inflection point, and if the third inflection point does not exist, all the air conditioning heat consumption data related to the cold water is obtained. An approximate straight line is calculated as an object .
Further, in one configuration example of the air conditioning heat consumption evaluation apparatus of the present invention, the high heat consumption extraction means includes the approximate straight line calculation means for air conditioning heat consumption data related to cold water in an area where the outside air enthalpy is equal to or greater than a predetermined value α. With regard to the calculated first inflection point, when there is air conditioning heat consumption data related to hot water in the summer in an evaluation target area where the outside air enthalpy is equal to or greater than the enthalpy of the first inflection point, the heat consumption is high. If there is no air-conditioning heat consumption data related to hot water in summer in the evaluation target area, it is determined that the heat consumption is not high, and if the first inflection point exists, An approximate straight line calculated by the approximate straight line calculating means for data of air-conditioning heat consumption regarding cold water in a region where the enthalpy is equal to or greater than the enthalpy of the first inflection point; The first intersection with the axis of the outside air enthalpy is obtained, and the air conditioning heat consumption data relating to the cold water in the region where the first inflection point does not exist and the outside air enthalpy is equal to or lower than the enthalpy of the first inflection point is obtained. When there is no second inflection point searched by the approximate straight line calculation means as a target, and there exists a third inflection point calculated by the approximate straight line calculation means with respect to all data of air-conditioning heat consumption related to cold water , The first intersection of the approximate straight line calculated by the approximate straight line calculation means and the axis of the external air enthalpy for the data of air-conditioning heat consumption related to cold water in the region where the outdoor enthalpy is equal to or greater than the enthalpy of the third inflection point When the third inflection point does not exist, the approximate straight line calculated by the approximate straight line calculation means and the outside air enthalpy axis for all data of air-conditioning heat consumption related to cold water When the enthalpy of the first intersection is greater than or equal to a predetermined value ζ, it is determined that the heat consumption is high, and the enthalpy of the first intersection is less than the predetermined value ζ. If the first and second inflection points exist, the outside enthalpy is greater than or equal to the enthalpy of the second inflection point, and the first inflection point is determined. A second intersection of the approximate straight line calculated by the approximate straight line calculation means and the outside air enthalpy axis for data of air-conditioning heat consumption related to cold water in a region below the enthalpy of the enthalpy is obtained, and the first inflection point exists When the second inflection point does not exist, the approximate straight line calculated by the approximate straight line calculation means for the air-conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or lower than the enthalpy of the first inflection point. And above A second intersection point with the axis of the air enthalpy is obtained, and when the first inflection point does not exist and the third inflection point exists, the outside air enthalpy is equal to or smaller than the enthalpy of the third inflection point. A second intersection point between the approximate straight line calculated by the approximate straight line calculation means and the axis of the outside air enthalpy for the data of the air-conditioning heat consumption related to the cold water in the region is obtained, and the enthalpy of the second cross point is equal to or less than a predetermined value η In this case, it is determined that the heat consumption is high, and if the enthalpy at the second intersection is larger than the predetermined value η, it is determined that the heat consumption is not high and the outside air enthalpy is a predetermined value. A third intersection between the approximate straight line calculated by the approximate straight line calculation means and the axis of the outside air enthalpy for the air conditioning heat consumption data related to hot water in a region equal to or less than β is obtained, and the enthalpy of the third intersection is the center. If there is an inflection point searched by the approximate straight line calculation means for air conditioning heat consumption data relating to cold water within a certain range, it is determined that the heat consumption is high, and the certain range If there is no inflection point, it is determined that the heat consumption is not high.

  The air conditioning heat consumption evaluation method of the present invention is measured or calculated in an air conditioning heat consumption measurement step for measuring or calculating air conditioning consumption heat, an outside air enthalpy measurement step for measuring or calculating outside air enthalpy, and the air conditioning heat consumption measurement step. The storage step of storing the air-conditioning heat consumption and the outside air enthalpy measured or calculated in the outside air enthalpy measurement step in association with each other and storing them in the first storage means, and the outside air enthalpy with respect to the data stored in the first storage means For one axis, an approximate straight line calculating step for calculating an approximate line of data and an inflection point of the approximate curve when the air conditioning heat consumption is taken for the other axis, and the approximate straight line or variable calculated in this approximate straight line calculating step. Based on the inflection point, heat to extract the state of high heat consumption that consumes more air conditioning heat than ideal amount A multiple consumption extraction step, and a multiple consumption factor identification step for identifying a multiple consumption factor based on the information in the second storage means that prestores the multiple consumption factor information for each high consumption amount state. It is characterized by comprising.

  According to the present invention, the air conditioning consumption heat amount measurement means, the outside air enthalpy measurement means, the first and second storage means, the approximate straight line calculation means, the heat quantity consumption consumption extraction means, and the heat quantity consumption factor identification means are provided. By providing, it is possible to detect waste of heat consumption without using qualitative information such as building attributes, and it is possible to identify a factor of high energy consumption. As an advantage of not using qualitative information such as building attributes, it is possible to save time and effort for inputting information and to expand application target sites.

It is a block diagram which shows the structure of the air-conditioning heat consumption consumption evaluation apparatus which concerns on embodiment of this invention. It is a flowchart explaining operation | movement of the air-conditioning heat consumption evaluation apparatus which concerns on embodiment of this invention. It is a figure explaining the calculation method of the approximate straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a figure explaining the calculation method of the approximate straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a figure explaining the calculation method of the approximate straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a flowchart explaining the calculation method of the approximate straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a figure explaining the search method of the inflection point of the approximate line in embodiment of this invention. It is a figure explaining the search method of the inflection point of the approximate line in embodiment of this invention. It is a flowchart explaining the search method of the inflection point of the approximate line in embodiment of this invention. It is a figure explaining the inflexion point determination process of the approximate straight line in embodiment of this invention. It is a flowchart explaining the inflexion point determination process of the approximate straight line in embodiment of this invention. It is a figure explaining the calculation method of the ideal straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a figure explaining the calculation method of the ideal straight line of the air-conditioning consumption heat amount in embodiment of this invention. It is a figure explaining the calorie | heat amount heavy consumption extraction process in the embodiment of this invention, and a heat | fever amount heavy consumption factor specific process. It is a figure explaining the calorie | heat amount heavy consumption extraction process in the embodiment of this invention, and a heat | fever amount heavy consumption factor specific process. It is a figure explaining the calorie | heat amount heavy consumption extraction process in the embodiment of this invention, and a heat | fever amount heavy consumption factor specific process. It is a figure explaining the calorie | heat amount heavy consumption extraction process in the embodiment of this invention, and a heat | fever amount heavy consumption factor specific process.

[Principle of the Invention]
It is important for building owners to know whether there is room to reduce the amount of heat in their buildings in order to promote energy conservation measures. Further, for example, when the building owner owns a plurality of buildings, the building owner can improve cost and time efficiency by preferentially taking measures against the building where the room for reducing the amount of heat remains. Therefore, there is a need to be able to detect wasteful consumption of heat and to identify factors that consume a lot of energy, but it is desirable to be able to further expand the application target site.

  Here, the inventor pays attention to the fact that the factor that hinders the expansion of the applicable site is the use of qualitative information such as building attributes, and as a result of earnest research, in relation to the heat consumption of the building and the outside air enthalpy, the building It was found that there is a characteristic in the imaginary heat consumption of. Then, as a correlation analysis of the two indexes of the outside air enthalpy and the air conditioning calorific value, it was conceived that the waste of heat consumption in the air conditioning was detected by comparing the ideal air conditioning calorific characteristic with the actual air conditioning calorific characteristic.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an air conditioning heat consumption evaluation apparatus according to an embodiment of the present invention.
The air-conditioning heat consumption evaluation device includes an air-conditioning heat consumption measurement unit 1, an outside air enthalpy measurement unit 2, a measurement value database (measurement value DB) 3, an approximate straight line calculation unit 4, an ideal heat consumption characteristic database (ideal heat consumption characteristic) DB) 5, an ideal straight line calculation unit 6, a large amount of heat consumption extraction unit 7, a large amount of heat consumption factor database (heat amount large consumption factor DB) 8, a large amount of heat consumption factor identification unit 9, and a display unit 10. Is done.

Hereinafter, the operation of the air conditioning heat consumption evaluation apparatus of the present embodiment will be described. FIG. 2 is a flowchart for explaining the operation of the air conditioning heat consumption evaluation apparatus.
The air-conditioning heat consumption measuring unit 1 measures the air-conditioning heat consumption Q for at least one of the heat medium (cold water, hot water, steam) supplied to an air conditioner (not shown) (step S1 in FIG. 2). Alternatively, the air conditioning consumption heat quantity measuring unit 1 calculates ΔT as the difference between the return temperature of the heat medium supplied from the heat source to the air conditioner and the return temperature of the heat medium returned from the air conditioner to the heat source, and the flow rate of the heat medium. Where F is the heat capacity, C is the heat capacity of the heat medium, and c is the specific heat of the heat medium.
Q = ΔT × F × C × c (1)
In addition, when the amount of energy input to the heat source is I and the efficiency of the heat source is K, the air-conditioning consumed heat amount Q may be calculated as follows.
Q = I × K (2)

  The outside air enthalpy measuring unit 2 measures the outside air enthalpy E (step S2 in FIG. 2). Alternatively, the outside air enthalpy measuring unit 2 may calculate the outside air enthalpy E from the outside air temperature and the outside air humidity. The air conditioning consumption heat quantity Q measured or calculated by the air conditioning consumption heat quantity measurement unit 1 and the outside air enthalpy E measured or calculated by the outside air enthalpy measurement unit 2 are stored in the measurement value DB 3 in association with each other (step S3 in FIG. 2). By repeating the acquisition of the air-conditioning heat consumption Q and the outside air enthalpy E every predetermined time, it is possible to acquire a large number of data consisting of a set of the air-conditioning heat consumption Q and the outside air enthalpy E.

  Next, the approximate straight line calculation unit 4 takes the data stored in the measurement value DB 3 when the outside air enthalpy E is taken on the X axis (horizontal axis) and the air-conditioning heat consumption Q is taken on the Y axis (vertical axis). An approximate straight line is calculated (step S4 in FIG. 2). The approximate straight line calculation unit 4 has an inflection point searching means (not shown) and an approximate curve deriving means (not shown).

  3A, FIG. 3B, FIG. 4A, FIG. 4B, and FIG. 5 are diagrams for explaining an approximate straight line calculation method, and FIG. 6 is an air-conditioning heat consumption Q related to cold water (hereinafter referred to as cold heat). It is a flowchart explaining the calculation method of the approximate straight line of quantity Qc). 3 (A), FIG. 3 (B), FIG. 4 (A), FIG. 4 (B), and FIG. 5, 30 is the data of the amount of cold heat Qc, 31 is the amount of air-conditioning heat consumption Q related to hot water (hereinafter referred to as the amount of heat Qh). It is data of.

  First, the approximate straight line calculation unit 4 searches the first inflection point P1 for the data of the amount of heat Qc in the region where the outside air enthalpy is equal to or greater than the predetermined value α [kJ / kg (DA)] (step S100 in FIG. 6). ). Here, α is a predetermined value, and is the outside air enthalpy that should not have consumed the heat. An inflection point search method will be described later. When the first inflection point P1 exists, the approximate straight line calculation unit 4 calculates the approximate straight line L1 with respect to the data of the heat quantity Qc in the region where the outside air enthalpy is equal to or larger than the enthalpy of the first inflection point P1 ( FIG. 6 step S101). In this way, as shown in FIG. 3A, the first inflection point P1 is searched, and the approximate straight line L1 is calculated.

  Subsequently, the approximate straight line calculation unit 4 searches for the second inflection point P2 for the data of the amount of heat Qc in the region where the outside air enthalpy is equal to or less than the enthalpy of the first inflection point P1 (step S102 in FIG. 6). . By the processing in step S102, the second inflection point P2 is searched as shown in FIG.

  When the second inflection point P2 exists, the approximate line calculation unit 4 compares the enthalpy of the second inflection point P2 with the predetermined value α as shown in FIG. 4A (step S103 in FIG. 6). ). The approximate straight line calculation unit 4 matches the enthalpy of the second inflection point P2 with the predetermined value α, or the enthalpy of the second inflection point P2 falls within a certain error range centered on the predetermined value α. In some cases, the first and second inflection points P1 and P2 with respect to the data of the cooling energy Qc in the region where the outside air enthalpy is greater than or equal to the enthalpy of the second inflection point P2 and less than or equal to the enthalpy of the first inflection point P1. An approximate straight line L2 is calculated, and an approximate straight line L3 is calculated for the data of the amount of heat Qc in the region where the outside air enthalpy is equal to or smaller than the enthalpy of the second inflection point P2 (step S104 in FIG. 6). Thus, approximate lines L2 and L3 are calculated as shown in FIG.

  The approximate straight line calculation unit 4 does not match the enthalpy of the second inflection point P2 with the predetermined value α, and the enthalpy of the second inflection point P2 falls within a certain error range centered on the predetermined value α. If not, an approximate straight line is calculated for the data of the amount of heat Qc in the region where the outside air enthalpy is equal to or less than the enthalpy of the first inflection point P1 (step S105 in FIG. 6). In addition, when the second inflection point P2 does not exist in step S102, the approximate straight line calculation unit 4 approximates the data of the cooling energy Qc in the region where the outside enthalpy is equal to or less than the enthalpy of the first inflection point P1. Is calculated (step S106 in FIG. 6).

  In addition, when the first inflection point P1 does not exist in step S100, the approximate straight line calculation unit 4 searches for the third inflection point P3 for all the data of the cooling energy Qc (step S107 in FIG. 6). When the third inflection point P3 exists, the approximate straight line calculation unit 4 compares the enthalpy of the third inflection point P3 with the predetermined value α (step S108 in FIG. 6). The approximate straight line calculation unit 4 matches the enthalpy of the third inflection point P3 with the predetermined value α, or the enthalpy of the third inflection point P3 falls within a certain error range centered on the predetermined value α. In some cases, an approximate straight line is calculated for the data of the amount of heat Qc in the region where the outside air enthalpy is equal to or greater than the enthalpy of the third inflection point P3, and further, An approximate straight line is calculated for the data of the amount of heat Qc (step S109 in FIG. 6).

  The approximate straight line calculation unit 4 does not match the enthalpy of the third inflection point P3 with the predetermined value α, and the enthalpy of the third inflection point P3 falls within a certain error range centered on the predetermined value α. If not, an approximate straight line is calculated for all data of the cooling energy Qc (step S110 in FIG. 6). Further, when the third inflection point P3 does not exist in step S107, the approximate line calculation unit 4 calculates an approximate line for all the data of the cooling energy Qc (step S111 in FIG. 6). Thus, the calculation process of the approximate straight line of the amount of heat Qc is completed.

  Next, the approximate straight line calculation unit 4 calculates the approximate straight line L4 for the data of the heat quantity Qh in the region where the outside air enthalpy is equal to or less than the predetermined value β [kJ / kg (DA)]. Here, β is a predetermined value, and is usually the outside air enthalpy in which heat is consumed. Thus, the approximate straight line L4 is calculated as shown in FIG.

  Next, an inflection point search method will be described. 7A, 7B, 8A, and 8B are diagrams illustrating an inflection point search method, and FIG. 9 is a flowchart illustrating an inflection point search method. .

  When searching for an inflection point, the approximate straight line calculation unit 4 equally divides the target data area with five outdoor enthalpies E1, E2, E3, E4, and E5 as shown in FIG. 7A (FIG. 9). Step S200). In the search process of step S100, the target data area is an area where the outside air enthalpy is equal to or greater than the predetermined value α. In the search process of step S102, the outside air enthalpy is an area where the outside air enthalpy is equal to or less than the enthalpy of the first inflection point P1. Yes, in the case of the search processing in step S107, it is the entire data area. The approximate line calculation unit 4 selects a point that is a candidate for the inflection point by the inflection point determination process for the target data area after the division process in step S200 (step S201 in FIG. 9). The inflection point determination process will be described later.

  Subsequently, the approximate straight line calculation unit 4 includes a divided area including the inflection point candidates selected in step S201 (the area from E3 to E4 in the example of FIG. 7A) and the adjacent divided area (FIG. 7 ( In the example of A), the region from E2 to E3) is set as the next division target, and this division target is equally divided into five outdoor enthalpies E6, E7, E8, E9, and E10 as shown in FIG. Divide (step S202 in FIG. 9). After the dividing process in step S202, the approximate line calculation unit 4 selects a point that is an inflection point candidate by the inflection point determination process for the target data area (step S203 in FIG. 9).

  Subsequently, the approximate straight line calculation unit 4 includes a divided region (the region from E9 to E10 in the example of FIG. 7B) including the inflection point candidate selected in step S203 and the adjacent divided region (FIG. 7 (FIG. 7 (B)). In the example of B), the region from E8 to E9) is set as the next division target, and this division target is evenly divided into five outdoor enthalpies E11, E12, E13, E14, and E15 as shown in FIG. Divide (step S204 in FIG. 9). After the dividing process in step S204, the approximate line calculation unit 4 selects a point that is a candidate for the inflection point by the inflection point determination process for the target data area (step S205 in FIG. 9). Finally, the approximate line calculation unit 4 determines the point selected in step S205 as the inflection point P (step S206 in FIG. 9). In this way, the inflection point P can be searched as shown in FIG.

Next, the inflection point determination process will be described. FIG. 10 is a diagram for explaining the inflection point determination process, and FIG. 11 is a flowchart for explaining the inflection point determination process.
The approximate straight line calculation unit 4 calculates an approximate straight line for the data of the amount of heat Qc in the target data area located on the low enthalpy side from the boundary point between two adjacent divided areas, and at the high enthalpy side from the boundary point. An approximate straight line is calculated with respect to the data of the amount of heat Qc in the target data area (step S300 in FIG. 11). In the example of FIG. 10, when the divided areas from the outside air enthalpies E20 to E21 and the divided areas from the outside air enthalpies E21 to E22 are set, the enthalpy lower than the boundary point E21 between the two adjacent divided areas is set. An approximate straight line L10 is calculated for the data 50 of the amount of cold Qc in the target data area on the side, and an approximate line L11 for the data 51 of the amount of heat Qc in the target data area on the higher enthalpy side than the boundary point E21. It has been calculated.

  The approximate line calculation unit 4 performs such calculation of the approximate line for all two adjacent divided areas included in the target data area. For example, in the inflection point determination process in step S203, regarding the two areas of the divided area from the outside air enthalpy E2 to E6 and the divided area from the outside air enthalpy E6 to E7, the target data area located on the lower enthalpy side than the boundary point E6. An approximate line is calculated for the data of the amount of heat Qc, and an approximate line is calculated for the data of the amount of heat Qc in the target data area on the higher enthalpy side than the boundary point E6. Further, regarding the two areas of the divided area from the outside air enthalpy E6 to E7 and the divided area from the outside air enthalpy E7 to E8, it is approximated to the data of the cold energy Qc in the target data area on the lower enthalpy side than the boundary point E7. A straight line is calculated, and an approximate straight line is calculated for the data of the amount of heat Qc in the target data area located on the higher enthalpy side than the boundary point E7. In addition, with respect to the two areas of the divided area from the outside air enthalpy E7 to E8 and the divided area from the outside air enthalpy E8 to E9, it is approximated to the data of the cold energy Qc in the target data area on the lower enthalpy side than the boundary point E8. A straight line is calculated, and an approximate straight line is calculated for the data of the amount of heat Qc in the target data area located on the higher enthalpy side than the boundary point E8. In addition, with respect to the two areas of the divided area from the outside air enthalpy E8 to E9 and the divided area from the outside air enthalpy E9 to E10, approximation is made to the data of the cooling energy Qc in the target data area on the lower enthalpy side than the boundary point E9. While calculating a straight line, an approximate straight line is calculated with respect to the data of the amount of heat Qc in the target data area on the higher enthalpy side than the boundary point E9. Furthermore, with respect to the two areas of the divided area from the outside air enthalpy E9 to E10 and the divided area from the outside air enthalpy E10 to E4, it is approximated to the data of the cold energy Qc in the target data area on the lower enthalpy side than the boundary point E10. While calculating a straight line, an approximate straight line is calculated with respect to the data of the amount of heat Qc in the target data area on the higher enthalpy side than the boundary point E10.

Subsequently, the approximate straight line calculation unit 4 calculates the amount of heat of the target data area on the lower enthalpy side than the approximate straight line and the boundary point calculated for the target data area on the lower enthalpy side than the boundary point between two adjacent divided areas. The sum of squares of errors from the data of Qc is calculated, and the approximate straight line calculated for the target data region on the higher enthalpy side than the boundary point and the cold energy Qc of the target data region on the higher enthalpy side than the boundary point are calculated. By calculating the sum of squares of errors with data and adding these calculation results, the sum of squares of errors in the target data area on the lower enthalpy side than the boundary point and on the higher enthalpy side than the boundary point A total value e with the sum of squares of errors in the target data area is calculated (step S301 in FIG. 11). If the sum of squares of errors in the target data area on the lower enthalpy side than the boundary point is e1, and the square sum of errors in the target data area on the higher enthalpy side of the boundary point is e2, the square sum of errors. The total value e of
e = e1 + e2 (3)

The approximate straight line calculation unit 4 performs such calculation of the sum of squares of errors for all two adjacent divided areas included in the target data area.
Next, the approximate straight line calculation unit 4 obtains the minimum value of the total value e of the square sum of errors calculated in step S301 (step S302 in FIG. 11).

Then, the approximate straight line calculation unit 4 obtains the correlation coefficient R ² and the first order coefficient γ of the approximate straight line for each of the two adjacent regions where the total sum e of the squares of errors is minimized (see FIG. 11 step S303). For example, the sum of squares of errors in the target data area on the lower enthalpy side than the boundary point E21 between the two adjacent divided areas shown in FIG. 10 and the error 2 in the target data area on the higher enthalpy side than the boundary point E21. Assuming that the total value e with the sum of multiplications is the minimum value, the equation of the approximate straight line L10 in the target data region on the lower enthalpy side than the boundary point E21 is Y = 0.5076X + 1.1968, and the correlation coefficient R ² is 0. .2746, the linear coefficient γ of the approximate straight line L10 is 0.5076. Further, the equation of the approximate line L11 in the target data region on the higher enthalpy side than the boundary point E21 is Y = 1.4087X-27.952, the correlation coefficient R ² is 0.5268, and the first order coefficient of the approximate line L11 γ is 1.4087.

Next, when at least one of the two correlation coefficients R ² calculated in step S303 is equal to or less than a predetermined threshold value TH1 (YES in step S304 in FIG. 11), the approximate straight line calculation unit 4 squares the error. The combination of two adjacent divided areas whose sum total value e is minimized is excluded from the minimum value determination target (step S305 in FIG. 11), and the process returns to step S302. The reason why the processes of steps S304 and S305 are performed is to exclude the case where the number of data is small and the sum of squares of errors is accidentally small.

  Further, when the difference between the two coefficients γ calculated in step S303 is equal to or less than a predetermined threshold value TH2 (YES in step S306 in FIG. 11), the approximate straight line calculation unit 4 determines that the total sum e of errors is equal to e. The combination of two adjacent divided areas that are minimized is excluded from the minimum value determination target (step S305 in FIG. 11), and the process returns to step S302. The reason why the processes of steps S306 and S305 are performed is to exclude the case where the sum of squares of the error is small but the characteristic of the amount of cold heat Qc has not changed.

Finally, the approximate straight line calculation unit 4 determines two adjacent divided regions in which the two correlation coefficients R ² are larger than the threshold value TH1 and the difference between the two coefficients γ is larger than the threshold value TH2. (NO in steps S304 and S306 in FIG. 11), the boundary point between the two adjacent divided regions is determined as a candidate point of the inflection point (step S307 in FIG. 11). For example, in the example of FIG. 10, the outside air enthalpy E21 is a candidate point of inflection point. This is the end of the inflection point determination process. In each step described with reference to FIG. 11, the sum of absolute values of errors may be used instead of the square sum of errors.

  Next, the operation of the ideal straight line calculation unit 6 will be described. 12A, 12B, and 13 are diagrams for explaining an ideal straight line calculation method. 12A, 12B, and 13, 30 is data of the amount of cold Qc, and 31 is data of the amount of heat Qh.

  In the ideal heat consumption characteristic DB5, an ideal heat consumption characteristic is stored in advance. The ideal straight line calculation unit 6 calculates an ideal straight line of data when the outside air enthalpy E is taken on the X axis (horizontal axis) and the air-conditioning heat consumption Q is taken on the Y axis (vertical axis) with respect to the data stored in the measurement value DB 3. Calculate (step S5 in FIG. 2).

  First, as shown in FIG. 12 (A), the ideal straight line calculation unit 6 performs a first inflection point of data of a predetermined outside air enthalpy a [kJ / kg (DA)] on the X axis and the amount of cold heat Qc. A straight line passing through P1 is calculated, and this straight line is defined as an ideal straight line L20 of the amount of heat Qc in the region where the outside air enthalpy is equal to or larger than the enthalpy of the first inflection point P1. The outside air enthalpy a is a value stored in advance in the ideal heat consumption characteristic DB5.

  Further, the ideal straight line calculation unit 6 performs the first inflection point of the data of the predetermined outside air enthalpy b [kJ / kg (DA)] on the X axis and the data of the cold energy Qc as shown in FIG. A straight line passing through P1 is calculated, and this straight line is defined as an ideal straight line L21 of the amount of heat Qc in a region where the outside air enthalpy is equal to or smaller than the enthalpy of the first inflection point P1. The outside air enthalpy b is a value stored in advance in the ideal heat consumption characteristic DB5.

  Further, as shown in FIG. 13, the ideal straight line calculation unit 6 is connected to an ideal straight line L20 with respect to a straight line L22 parallel to the Y axis and passing through a predetermined outside air enthalpy b [kJ / kg (DA)] on the X axis. Calculate a line with line symmetry. Then, the ideal straight line calculation unit 6 sets the straight line having the calculated straight line slope and passing through the point of the outside air enthalpy b [kJ / kg (DA)] on the X axis as the ideal straight line L23 of the heat quantity Qh. . Above, the process of the ideal straight line calculation part 6 is complete | finished.

  Next, the high heat consumption extraction unit 7 is based on the approximate straight line or the inflection point calculated by the approximate straight line calculation unit 4, and the heat consumption high heat consumption state Q is consumed more than the ideal amount. Is extracted (step S6 in FIG. 2). FIGS. 14 to 17 are diagrams for explaining the heat consumption intensive extraction process and the heat consumption intensive factor specifying process.

  For example, in the case of trying to extract a state of high heat consumption in air conditioning in summer, the heat consumption intensive extraction unit 7 has hot water in an evaluation target area where the outside air enthalpy is equal to or higher than the enthalpy of the first inflection point P1 as shown in FIG. Evaluate whether or not is consumed. When the enthalpy of the first inflection point P1 is in the vicinity of the predetermined value ε [kJ / kg (DA)], the outside enthalpy is greater than or equal to the enthalpy of the first inflection point P1. The area is set as the evaluation target area. In addition, when the first inflection point P1 is not in the vicinity of the predetermined value ε [kJ / kg (DA)], the heat consumption intensive extraction unit 7 has the outside air enthalpy of the predetermined value ε [kJ / kg (DA)]. The above area is set as an evaluation target area.

  When the hot water is consumed in the evaluation target area (when the data of the hot heat quantity Qh exists in the evaluation target area), the hot energy consumption extraction unit 7 consumes the hot water in the summer, and the heat consumption is high. Judge that it is. In addition, when the hot water is not consumed in the evaluation target area, the heat consumption intensive extraction unit 7 determines that there is no problem and the heat consumption is not high. In this way, it is possible to extract a state of high heat consumption in air conditioning in summer.

  In addition, for example, when the heat consumption intensive extraction unit 7 tries to extract a heat consumption intensive state in air conditioning in the summer season, as shown in FIG. 15, the heat in the region where the outside air enthalpy is equal to or greater than the enthalpy of the first inflection point P1. By calculating the intersection point of the approximate line L1 of the quantity Qc with the X axis, it is evaluated whether or not the heat consumption is high.

  When the first inflection point P1 exists, the heat-intensive consumption extraction unit 7 approximates a straight line of the cold heat amount Qc in the region where the outside air enthalpy is equal to or larger than the enthalpy of the first inflection point P1, as shown in FIG. Find the intersection n of L1 with the X axis. In addition, the heat-intensive consumption extraction unit 7 does not have the first inflection point P1, has the third inflection point P3, and cools the heat in the region where the outside enthalpy is equal to or greater than the enthalpy of the third inflection point P3. When the approximate line is calculated using the data of the quantity Qc, the intersection point of the approximate curve with the X axis is obtained. In addition, the heat-intensive consumption extraction unit 7 does not have the third inflection point P3, or the enthalpy of the third inflection point P3 does not match the predetermined value α, and the third inflection point P3. Is not within a certain error range centered on the predetermined value α, the intersection point with the X axis of the approximate straight line calculated using all the data of the amount of heat Qc is obtained.

  When the enthalpy at the intersection of the approximate straight line with the X axis is equal to or greater than a predetermined value ζ [kJ / kg (DA)], for example, the heat consumption intensive extraction unit 7 determines that the heat consumption is high. In addition, when the enthalpy at the intersection is less than the predetermined value ζ [kJ / kg (DA)], for example, the high heat consumption extraction unit 7 determines that there is no problem and the heat consumption is not high. In this way, it is possible to extract a state of high heat consumption in air conditioning in summer.

  Further, for example, when the heat consumption intensive extraction section 7 tries to extract the heat consumption intensive state in the air conditioning in the summer and winter seasons, the enthalpy of the outside inflection point P2 is shown in FIG. As described above, by calculating the intersection point of the approximate straight line L2 of the cold energy Qc with the X axis in the region below the enthalpy of the first inflection point P1, it is evaluated whether or not the heat consumption is high.

  When the first and second inflection points P1 and P2 are present, the heat intensive consumption extraction unit 7 has an outside enthalpy that is equal to or greater than the enthalpy of the second inflection point P2, as shown in FIG. The intersection point n with the X axis of the approximate straight line L2 of the amount of heat Qc in the region below the enthalpy of the bending point P1 is obtained. Further, the heat-intensive consumption extraction unit 7 does not have the second inflection point P2, or the enthalpy of the second inflection point P2 does not match the predetermined value α, and the second inflection point P2. Is not within a certain error range centered on the predetermined value α, the intersection of the outside air enthalpy with the X axis of the approximate straight line of the heat quantity Qc in the region below the enthalpy of the first inflection point P1 Ask. Further, the heat-intensive consumption extraction unit 7 does not have the first inflection point P1, has the third inflection point P3, and cools the outside air enthalpy in the region below the enthalpy of the third inflection point P3. When the approximate line is calculated using the data of the quantity Qc, the intersection point of the approximate curve with the X axis is obtained.

  When the enthalpy at the intersection of the approximate straight line with the X axis is equal to or less than a predetermined value η [kJ / kg (DA)], for example, the heat consumption intensive extraction unit 7 determines that the heat consumption is high. Moreover, when the enthalpy of the intersection is larger than, for example, a predetermined value η [kJ / kg (DA)], the high heat consumption extraction unit 7 determines that there is no problem and the heat consumption is not high. In this way, it is possible to extract a state of high heat consumption in the air conditioning in the intermediate period.

  In addition, for example, in the case of trying to extract a state of high heat consumption in air conditioning in winter, the high heat consumption extraction unit 7 obtains an intersection m with the X axis of the approximate straight line L4 of the heat quantity Qh as shown in FIG. It is evaluated whether or not the heat consumption is high depending on whether or not the inflection point of the cold energy Qc exists within a certain range centered on the enthalpy at the intersection m.

  If the inflection point (the second inflection point P2 in the example of FIG. 17) of the cold heat quantity Qc exists within a certain range centered on the enthalpy at the intersection m, the high heat consumption extraction unit 7 consumes a large amount of heat. Judge that it is in the state. Further, the heat-intensive consumption extracting unit 7 determines that there is no problem and the heat-intensive consumption state is not present when the inflection point of the cold energy Qc does not exist within a certain range centered on the enthalpy of the intersection m. To do. In this way, it is possible to extract a state of high heat consumption in air conditioning in winter.

  Next, the high heat consumption factor specifying unit 9 specifies the high heat consumption factor extracted by the high heat consumption extraction unit 7 (step S7 in FIG. 2). In the high heat consumption factor DB 8, factor information of high heat consumption is stored in advance for each state of high heat consumption. The heat quantity consumption factor specifying unit 9 specifies a heat quantity consumption factor based on the information stored in the heat quantity consumption factor DB 8.

The factor of high heat consumption is determined by the range of the outside air enthalpy and the type of heat consumed.
When it is determined that hot water is consumed in the summer and the heat consumption is high, the heat quantity consumption factor specifying unit 9 specifies that summer air conditioning is the cause of the heat consumption.

  Further, the heat quantity high consumption factor specifying unit 9 has an enthalpy at the intersection of the approximate straight line of the heat quantity Qc with the X axis in the region where the outside air enthalpy is equal to or larger than the enthalpy of the first inflection point P1 or the third inflection point P3. As a result of obtaining the intersection of the approximate straight line of the amount of heat Qc with the X axis in the above region, the enthalpy of this intersection is equal to or greater than a predetermined value ζ [kJ / kg (DA)] and the heat consumption is high. If judged, summer air conditioning is identified as a factor of high heat consumption.

  Further, the heat quantity high consumption factor specifying unit 9 has an intersection with the X axis of the approximate straight line of the cold heat quantity Qc in an area where the outside air enthalpy is not less than the enthalpy of the second inflection point P2 and not more than the enthalpy of the first inflection point P1. Alternatively, as a result of obtaining the intersection point of the approximate straight line of the heat quantity Qc with the X axis in the region where the outside air enthalpy is equal to or less than the enthalpy of the third inflection point P3, the enthalpy of this intersection point is a predetermined value η [kJ / kg (DA)]. In the following, if it is determined that the heat consumption is high, the air conditioning in the interim period is specified as the cause of the high heat consumption.

  In addition, the heat consumption-high consumption factor specifying unit 9 obtains an intersection point of the approximate straight line of the heat quantity Qh with the X axis, and confirms that the inflection point of the cold heat quantity Qc exists within a certain range centered on the enthalpy of this intersection point. As a result, if it is determined that the heat consumption is high, air conditioning in the winter season is identified as a factor of high heat consumption.

  The display unit 10 displays the state information indicating the high heat consumption extracted by the high heat consumption extraction unit 7 and the factor information indicating the high heat consumption factor specified by the high heat consumption factor specifying unit 9 (step in FIG. 2). S8). The user who uses the air conditioning heat consumption evaluation apparatus can examine an appropriate improvement method when the factor information of the large heat consumption is displayed.

  As described above, in this embodiment, waste of heat consumption can be detected without using qualitative information such as building attributes, and a factor of high energy consumption can be specified.

  The air-conditioning heat consumption evaluation apparatus according to the present embodiment can be realized by a computer including a CPU, a storage device, and an interface, and a program that controls these hardware resources. The CPU executes the processing described in the present embodiment in accordance with a program stored in the storage device.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a technique for detecting waste of heat consumption of air conditioning and identifying a factor of high energy consumption.

  DESCRIPTION OF SYMBOLS 1 ... Air-conditioning consumption heat amount measurement part, 2 ... Outside air enthalpy measurement part, 3 ... Measurement value database, 4 ... Approximate straight line calculation part, 5 ... Ideal heat consumption characteristic database, 6 ... Ideal straight line calculation part, 7 ... Excess heat consumption extraction part , 8 ... Heat consumption factor database, 9 ... Heat consumption factor specifying part, 10 ... Display part.

Claims (6)

An air-conditioning heat consumption measuring means for measuring or calculating air-conditioning heat consumption;
Outside air enthalpy measuring means for measuring or calculating outside air enthalpy,
First storage means for storing the air conditioning consumption heat quantity measured or calculated by the air conditioning consumption heat quantity measurement means and the outside air enthalpy measurement or calculation by the outside air enthalpy measurement means in association with each other;
With respect to the data stored in the first storage means, an approximate straight line for calculating an approximate line of data and an inflection point of the approximate curve when the outside air enthalpy is taken on one axis and the heat consumption of air conditioning is taken on the other axis. A calculation means;
Based on the approximate straight line or the inflection point calculated by the approximate straight line calculating means, the heat quantity high consumption extracting means for extracting the state of high heat consumption that consumes more air conditioning heat consumption than the ideal amount; and
Second storage means for preliminarily storing factor information of heat consumption, for each state of heat consumption;
A heat consumption evaluation apparatus for air conditioning heat consumption, comprising: a heat consumption intensive factor specifying means for specifying a factor of heat consumption based on information stored in the second storage means. In the air conditioning heat consumption evaluation apparatus according to claim 1,
The approximate straight line calculating means includes
An inflection point searching means for searching for an inflection point of the approximate curve;
An approximate curve deriving means for obtaining the approximate curve;
The inflection point search means searches for a first inflection point for air conditioning heat consumption data related to cold water in a region where the outside air enthalpy is equal to or greater than a predetermined value α, and the outside air enthalpy is the enthalpy of the first inflection point. When the second inflection point is searched for the air conditioning heat consumption data related to cold water in the following areas, and the first and second inflection points do not exist, all the air conditioning heat consumption data related to cold water is obtained. Search for the third inflection point as a target,
The approximate curve deriving means calculates an approximate straight line for air-conditioning heat consumption data relating to hot water in a region where the outside air enthalpy is equal to or less than a predetermined value β, and when the first inflection point exists, the outside air enthalpy is the first. When an approximate straight line is calculated for the air conditioning heat consumption data relating to the cold water in a region equal to or greater than the enthalpy of the inflection point, the outside air is present when the first inflection point exists and the second inflection point does not exist. When the enthalpy calculates an approximate straight line for the air-conditioning heat consumption data relating to the cold water in the region below the enthalpy of the first inflection point, and the first and second inflection points exist, An approximate straight line is calculated for the air-conditioning heat consumption data related to the cold water in the region from the enthalpy of the second inflection point to the enthalpy of the first inflection point, and the outside air enthalpy An approximate straight line is calculated for the air conditioning heat consumption data relating to the cold water in the region below the enthalpy of the second inflection point, the first and second inflection points do not exist, and the third inflection point Is present, an approximate straight line is calculated for the air-conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or greater than the enthalpy of the third inflection point, and the outside air enthalpy is equal to or less than the enthalpy of the third inflection point. An approximate straight line is calculated for the air-conditioning heat consumption data relating to the chilled water in the region, and if there is no third inflection point, the approximate straight line is calculated for all the air-conditioning heat consumption data relating to the chilled water. Air conditioning heat consumption evaluation device. In the air-conditioning heat consumption evaluation apparatus according to claim 1 or 2,
The heat consumption intensive extraction means relates to the first inflection point calculated by the approximate straight line calculation means for the air conditioning heat consumption data relating to cold water in a region where the outside air enthalpy is equal to or greater than a predetermined value α, and the outside air enthalpy is the first inflection point. If there is data on air-conditioning heat consumption related to hot water in the summer in the evaluation area above the enthalpy of the inflection point, it is determined that the heat consumption is high and the air-conditioning consumption related to the hot water in the summer If there is no heat data, it is determined that the heat consumption is not high, and if the first inflection point exists, the cold water in the region where the outside enthalpy is equal to or greater than the enthalpy of the first inflection point. A first intersection of the approximate straight line calculated by the approximate straight line calculating means for the air conditioning heat consumption data relating to the axis of the outside air enthalpy is obtained, and the first There is no inflection point, and there is a second inflection point searched by the approximate straight line calculation means for the air conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or less than the enthalpy of the first inflection point. First, when there is a third inflection point calculated by the approximate straight line calculation means for all data of air-conditioning heat consumption related to cold water, the outside air enthalpy relates to the cold water in the region above the enthalpy of the third inflection point. A first intersection point between the approximate straight line calculated by the approximate straight line calculation means and the outside air enthalpy axis for the air conditioning heat consumption data is obtained, and if the third inflection point does not exist, the air conditioning heat consumption related to cold water. A first intersection point between the approximate straight line calculated by the approximate straight line calculation means and the axis of the outside air enthalpy is obtained for all the data, and the enthalpy of the first intersection point is predetermined. If the value ζ is greater than or equal to the value ζ, it is determined that the heat consumption is high, and if the enthalpy at the first intersection is less than the predetermined value ζ, it is determined that the heat consumption is not high, and the first In the case where the second inflection point exists, the approximation for the air-conditioning heat consumption data related to the cold water in the region where the outside enthalpy is greater than the enthalpy of the second inflection point and less than the enthalpy of the first inflection point. A second intersection point between the approximate straight line calculated by the straight line calculating means and the axis of the outside air enthalpy is obtained, and when the first inflection point exists and the second inflection point does not exist, the outside air enthalpy is A second intersection point between the approximate straight line calculated by the approximate straight line calculating means and the axis of the outside air enthalpy for the data of the heat consumption of air conditioning related to cold water in a region below the enthalpy of the first inflection point is obtained, and the first Inflection point When the third inflection point exists, the approximate straight line calculation means calculates the air-conditioning heat consumption data regarding the cold water in the region where the outside enthalpy is equal to or less than the enthalpy of the third inflection point. A second intersection of the approximate straight line and the axis of the outside air enthalpy is obtained, and when the enthalpy of the second intersection is equal to or less than a predetermined value η, it is determined that the heat consumption is high, and the second When the enthalpy at the intersection is larger than the predetermined value η, it is determined that the heat consumption is not high, and the approximate straight line calculation means is targeted for air conditioning heat consumption data related to hot water in an area where the outside air enthalpy is equal to or less than the predetermined value β. The third intersection of the approximate straight line calculated by the above and the axis of the outside air enthalpy is obtained, and the air-conditioning heat consumption data related to the cold water is within a certain range centered on the enthalpy of the third intersection. If there is an inflection point searched by the approximate straight line calculation means as an elephant, it is determined that the heat consumption is high, and if there is no inflection point within the certain range, the heat consumption is high An air-conditioning heat consumption evaluation apparatus characterized in that it is determined not to be An air-conditioning heat consumption measurement step for measuring or calculating air-conditioning heat consumption;
Outside air enthalpy measurement step for measuring or calculating outside air enthalpy,
A storage step of storing in the first storage means the air conditioning consumption heat amount measured or calculated in the air conditioning consumption heat amount measurement step and the outside air enthalpy measured or calculated in the outside air enthalpy measurement step in association with each other;
An approximate straight line for calculating an approximate line of data and an inflection point of the approximate curve when the outside air enthalpy is taken on one axis and the air-conditioning heat consumption is taken on the other axis with respect to the data stored in the first storage means. A calculation step;
Based on the approximate straight line or inflection point calculated in this approximate straight line calculation step, a high heat consumption extraction step for extracting a state of high heat consumption that consumes more heat than the ideal amount of air conditioning,
And a heat consumption factor specifying step for specifying a heat consumption factor based on the information in the second storage means for storing the heat consumption factor information in advance for each heat consumption state. Air conditioning heat consumption evaluation method. In the air-conditioning heat consumption evaluation method according to claim 4 ,
The approximate straight line calculating step includes:
An inflection point searching step for searching for an inflection point of the approximate curve;
An approximate curve deriving step for obtaining the approximate curve,
The inflection point searching step searches for a first inflection point for air conditioning heat consumption data regarding cold water in a region where the outside air enthalpy is a predetermined value α or more, and the outside air enthalpy is the enthalpy of the first inflection point. When the second inflection point is searched for the air conditioning heat consumption data related to cold water in the following areas, and the first and second inflection points do not exist, all the air conditioning heat consumption data related to cold water is obtained. Search for the third inflection point as a target,
The approximating curve derivation step calculates an approximate straight line for air-conditioning heat consumption data relating to hot water in a region where the outside air enthalpy is equal to or less than a predetermined value β, and when the first inflection point exists, the outside air enthalpy is the first. When an approximate straight line is calculated for the air conditioning heat consumption data relating to the cold water in a region equal to or greater than the enthalpy of the inflection point, the first inflection point exists and the second inflection point does not exist. When the enthalpy calculates an approximate straight line for the air-conditioning heat consumption data relating to the cold water in the region below the enthalpy of the first inflection point, and the first and second inflection points exist, An approximate straight line is calculated for air-conditioning heat consumption data relating to cold water in a region not less than the enthalpy of the second inflection point and not more than the enthalpy of the first inflection point, and the outside air enthalpy An approximate straight line is calculated with respect to data of air-conditioning heat consumption related to cold water in a region below the enthalpy of the second inflection point, the first and second inflection points do not exist, and the third inflection point exists. If there is a point, an approximate straight line is calculated for the air conditioning heat consumption data regarding the cold water in the region where the outside air enthalpy is equal to or larger than the enthalpy of the third inflection point, and the outside air enthalpy is the enthalpy of the third inflection point. An approximate straight line is calculated for the air conditioning heat consumption data related to cold water in the following region, and when there is no third inflection point, the approximate straight line is calculated for all the air conditioning heat consumption data related to cold water. Characteristic evaluation method for heat consumption of air conditioning. In the air-conditioning heat consumption evaluation method according to claim 4 or 5,
In the heat consumption intensive extraction step, the outdoor enthalpy is the first inflection point calculated in the approximate straight line calculation step for air conditioning heat consumption data related to cold water in a region where the outdoor air enthalpy is equal to or greater than a predetermined value α. If there is data on air-conditioning heat consumption related to hot water in the summer in the evaluation area above the enthalpy of the inflection point, it is determined that the heat consumption is high and the air-conditioning consumption related to the hot water in the summer If there is no heat data, it is determined that the heat consumption is not high, and if the first inflection point exists, the cold water in the region where the outside enthalpy is equal to or greater than the enthalpy of the first inflection point. obtains a first intersection of the approximate line calculated by the approximate line calculating step the data of the air conditioning heat consumption as an object and the outside air enthalpy axis about Absent the first inflection point, a second variant of the outside air enthalpy may search by the approximate straight line calculating step as the target data of the air conditioning heat consumption related cold water in the following areas enthalpy of the first inflection point When there is no inflection point and there is a third inflection point calculated in the approximate straight line calculation step for all data of air-conditioning heat consumption related to cold water, the outside air enthalpy is equal to or greater than the enthalpy of the third inflection point. If the first intersection point of the approximate straight line calculated in the approximate straight line calculation step and the axis of the outside air enthalpy for the data of the air conditioning consumption heat amount related to the cold water in the region of, and when the third inflection point does not exist, Finding the first intersection of the approximate straight line calculated in the approximate straight line calculating step and the axis of the outside air enthalpy for all data of air conditioning heat consumption related to cold water, When the enthalpy of the first intersection is greater than or equal to the predetermined value ζ, it is determined that the heat consumption is high. When the enthalpy of the first intersection is less than the predetermined value ζ, the heat consumption is high. If the first and second inflection points exist and the outside air enthalpy is greater than or equal to the enthalpy of the second inflection point and less than or equal to the enthalpy of the first inflection point, air conditioning consumption related to cold water A second intersection point between the approximate straight line calculated in the approximate straight line calculation step and the outside air enthalpy axis is obtained for heat quantity data, the first inflection point exists, and the second inflection point is If not, the approximate straight line calculated in the approximate straight line calculation step for the air conditioning heat consumption data related to cold water in the region where the outside air enthalpy is equal to or lower than the enthalpy of the first inflection point and the axis of the outside air enthalpy And when the first inflection point does not exist and the third inflection point exists, the outside air enthalpy relates to the cold water in the region below the enthalpy of the third inflection point. A second intersection between the approximate straight line calculated in the approximate straight line calculation step and the outside air enthalpy axis is obtained for air conditioning heat consumption data, and when the enthalpy at the second intersection is equal to or less than a predetermined value η, If the enthalpy at the second intersection is greater than the predetermined value η, it is determined that the heat consumption is not high, and the outside enthalpy is in a region where the external air enthalpy is equal to or less than the predetermined value β. We obtain a third intersection point of the approximate line calculated by the approximate straight line calculating step as the target data of the air conditioning heat consumption regarding hot water and the outside air enthalpy axis, fixed around the enthalpy of the third intersection The囲内, if the inflection point of searching by the approximate straight line calculating step as the target data of the air conditioning heat consumption related cold water is present, determines that the state of the heat-intensive, inflection in the range of the constant When there is no point, it is determined that the heat consumption is not high, and the air conditioning heat consumption evaluation method is characterized.

Images