JP6929178B2 - Simulation equipment - Google Patents

Description

The present invention relates to a simulation device.

Conventionally, a technique for forming an opening on a wall surface of a building for shading and cutting the line of sight is known (see, for example, Patent Documents 1 and 2). In the technique described in Patent Document 1, light-shielding devices capable of blocking light from a moving light source are arranged in parallel with the plate surfaces facing each other, and a plurality of light-shielding plate materials having a plurality of light-transmitting openings are used. It includes a position-holding member that supports the plurality of the light-shielding plate materials in a state of having a light passing region between the adjacent light-shielding plate materials. As a result, when looking up from the indoor side to the outside while blocking sunlight, it is possible to feel the spatial expanse.

Further, in the technique described in Patent Document 2, the inner wall surface located in the lateral direction facing the opening provided in the outer wall of the building is inclined in the same direction in the out-of-plane direction of the outer wall. As a result, it is possible to suppress the intake of direct light while ensuring the view.

JP-A-2017-66614 Japanese Unexamined Patent Publication No. 2017-66687

However, the techniques described in the above Patent Documents 1 and 2 include calculation of the heat load due to the direct light of the sun on the building, evaluation of the feeling of openness that a person feels when looking at the wall surface, and through a plurality of openings in the wall surface. The brightness of the interior of the building due to sunlight is not calculated.

In consideration of the above facts, the present invention considers the above facts and, as a simulation when a wall surface having a plurality of openings is installed, calculates the heat load due to the direct light of the sun on the building, evaluates the feeling of openness, and the plurality of openings on the wall surface. The purpose is to be able to evaluate from multiple viewpoints at the same time, such as calculating the brightness of the interior of a building by the sunlight through.

The simulation device according to the present invention is a simulation device that performs a simulation when a wall surface having a plurality of openings is installed as an exterior of a building, and the plurality of the wall surface is based on preset solar radiation information. A heat load calculation unit that calculates the heat load due to the direct light of the sun to the building through the opening of the building, and an openness evaluation unit that evaluates the feeling of openness felt by a person who sees the wall surface from inside the building. It is configured to include a brightness calculation unit that calculates the brightness of the interior of the building by the sunlight through the plurality of openings on the wall surface based on the solar radiation information of the sun.

According to the simulation apparatus according to the present invention, the heat load due to the direct light of the sun to the building through the plurality of openings of the wall surface is based on the solar radiation information set in advance by the heat load calculation unit. To calculate. The openness evaluation unit evaluates the openness felt by a person who sees the wall surface from inside the building. In addition, the brightness calculation unit calculates the brightness of the interior of the building by the sunlight through the plurality of openings of the wall surface based on the solar radiation information of the sun.

In this way, as a simulation when a wall surface with a plurality of openings is installed, the calculation of the heat load due to the direct light of the sun on the building, the evaluation of the feeling of openness, and the light of the sun through the multiple openings of the wall surface are performed. It is possible to evaluate multiple viewpoints at the same time, such as calculating the brightness of the interior of a building.

The simulation apparatus according to the present invention further includes an opening shape setting unit that repeatedly sets the shapes of the plurality of openings on the wall surface, and the heat load calculation unit is described for each setting by the opening shape setting unit. Based on the shapes of the plurality of openings on the wall surface and the solar radiation information of the sun, the heat load due to the direct light of the sun on the building through the plurality of openings on the wall surface is calculated, and the feeling of openness is evaluated. For each setting by the opening shape setting unit, the unit gives a feeling of openness felt by the person based on the shape of the plurality of openings on the wall surface and the indoor position of the person who sees the wall surface from the interior of the building. The brightness calculation unit evaluates the shape of the plurality of openings on the wall surface, the solar radiation information of the sun, and the interior reflectance for each setting by the opening shape setting unit and the interior reflectance. , The brightness of the interior of the building due to the sunlight through the plurality of openings on the wall surface can be calculated. As a result, each time the shape of the opening is set, simultaneous evaluation of each viewpoint can be performed, so that the optimum shape can be easily searched.

The simulation apparatus according to the present invention can further include a visualization unit that visualizes the calculation result by the heat load calculation unit, the evaluation result by the openness evaluation unit, and the calculation result by the brightness calculation unit. As a result, the evaluation results of each viewpoint are visualized, so that the optimum shape can be easily searched.

As described above, according to the simulation apparatus of the present invention, as a simulation when a wall surface having a plurality of openings is installed, the calculation of the heat load due to the direct sunlight to the building, the evaluation of the feeling of openness, and the wall surface are performed. It is possible to simultaneously evaluate multiple viewpoints such as calculation of the brightness of the interior of a building by the sunlight through a plurality of openings.

It is a block diagram which shows the simulation apparatus which concerns on 1st Embodiment of this invention. It is a functional block diagram which shows the simulation apparatus which concerns on 1st Embodiment of this invention. It is a figure for demonstrating the method of setting the position, shape, and orientation of a building to be calculated. It is a figure for demonstrating the method of setting the position, shape, and orientation of a building existing around the building to be calculated. It is a figure for demonstrating the method of setting the position, shape, and orientation of the wall surface of the building to be calculated. It is a figure for demonstrating the design method of an opening. It is a figure for demonstrating the shape and size of an opening. It is a functional block diagram which shows the structure of the openness calculation part of the simulation apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows (A) the line-of-sight direction, and (B) is a figure which shows a normal distribution. It is a figure which shows the distribution in the line-of-sight direction which is determined. It is a figure which shows the length to each object in the line-of-sight direction. It is a figure which shows the example which visualized the calculation result of a heat load. It is a figure which shows the example which visualized the evaluation result of the feeling of openness. It is a figure which shows the example which visualized the calculation result of brightness. It is a flowchart which shows the content of the simulation processing routine of the simulation apparatus which concerns on 1st Embodiment of this invention. It is a functional block diagram which shows the structure of the openness calculation part of the simulation apparatus which concerns on 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
<Structure of the simulation device according to the first embodiment of the present invention>
As shown in FIG. 1, the simulation apparatus 100 according to the embodiment of the present invention includes a CPU 12, a graphic card 13, a GPU 14, a RAM 16, an HDD 18, a communication interface 21, and a bus 23 for connecting them to each other. There is.

The CPU 12 and GPU 14 execute various programs. The RAM 16 is used as a work area or the like when the CPU 12 executes various programs. The HDD 18 as a recording medium stores various programs and various data including a program for executing a simulation processing routine described later.

The simulation device 100 according to the present embodiment is shown in FIG. 2 in terms of functional blocks according to a program for executing the simulation processing routine. The simulation device 100 includes an input unit 10, a calculation unit 20, and an output unit 50.

The input unit 10 is a three-dimensional model generated by using data of a three-dimensional model representing a building to be calculated (for example, BIM (Building Information Modeling)) in which a wall surface having a plurality of openings is installed as an exterior of the building. Data) and information about the room to be evaluated for the building to be calculated are accepted as inputs.

The calculation unit 20 includes a building information setting unit 22, a peripheral building information setting unit 24, a wall opening setting unit 26, a simulation unit 30, and a visualization unit 40.

The building information setting unit 22 sets information about the building to be calculated in the calculation space based on the data of the three-dimensional model representing the building to be calculated. For example, as shown in FIG. 3, the position, shape, orientation, etc. of the building 60 to be calculated are set.

The peripheral building information setting unit 24 sets information about the peripheral buildings of the building to be calculated in the calculation space based on the data of the three-dimensional model representing each building prepared in advance. For example, as shown in FIG. 4, the position, shape, orientation, and the like of the buildings existing around the building 60 to be calculated are set.

The wall opening setting unit 26 sets information about a plurality of openings on the wall surface of the building to be calculated in the calculation space based on the data of the three-dimensional model representing the building to be calculated. For example, as shown in FIG. 5, the position, shape, orientation, etc. of the wall surface 60A of the building 60 to be calculated are set, and the position and shape of each opening of the wall surface 60A (size of inner opening, outer opening). Size) etc. are set.

Further, the wall surface opening setting unit 26 is repeatedly set while changing the position and shape of each opening of the wall surface 60A.

Here, a method of designing the opening will be described.

First, the opening design method comprises the following STEP1 to STEP3.

In STEP 1, the inner opening and the outer opening are overlapped so as to have the same shape and the same position when viewed from the front.

In STEP2, the inner opening is moved upward by mz (for example, 65 mm) and westward by mx (for example, 100 mm) so as to block the direct light of the solar altitude around 16:00 on July 23 (Fig. 6 (Fig. 6). See A)). However, it is only necessary to be able to cut 33 degrees or more at 16:00, which is the lowest solar altitude. West Sun takes into account the annual average, but shifts it to block direct light west of west-southwest at least as of 16:00 on July 23.

In STEP3, the inner opening is enlarged with the lower right corner O'of the inner opening as a base point in order to increase the brightness by taking in a large amount of indirect light within a range that does not interfere with the solar radiation shielding effect (FIG. 6 (B)). reference). As a result, the light reflected on the fore-edge area of the window opening, which is larger than before the shift, can be taken into the room as indirect light (for example, the size of the inner opening is 180 for the size of the outer opening of 140 × 140). × 180.).

By designing as described above, the brightness inside the building can be optimized without impairing the solar radiation shielding effect. For example, by setting the average brightness inside the window surface to 3000 cd / m ² or less and increasing the amount of indirect light that hits the window frame, it is possible to obtain comfortable brightness with suppressed brightness of the window surface.

Next, parameters related to the position and size of the opening will be described.

As shown in FIG. 7, the dimension of the outer opening is a × b, the dimension of the enlarged inner opening is c × d, and the lower right corner of the inner opening is the lower right corner of the inner opening with the lower right corner O of the outer opening as the base point. Let O'be the position mz upward and mx westward.

By using these parameters, various data regarding the position and size of the opening can be determined as follows.

Inner opening size: x = a, z = b
Outer opening size: x = c, z = d
Coordinates of the center point A of the outer opening when the base point is O (0,0) at the lower right corner of the outer opening and O'is the lower right corner of the inner opening: (1 / 2a, 1 / 2b) )
Coordinates of center point B of inner opening: (1 / 2c, 1 / 2d)
Distance traveled from base point O to O': x = mx, z = mz
Movement distance of the center point hx: x = mx + 1 / 2c-1 / 2a
hz: z = mz + 1 / 2d-1 / 2b
Opening magnification: (c × d) / (a × b) × 100%
Shade edge length (up / down / left / right)> t

Based on the above, the wall surface opening setting unit 26 according to the present embodiment has the dimensions a × b of the outer opening and the dimensions c × d of the inner opening after enlargement as the position and shape of each opening of the wall surface 60A. , Set the deviations mz and mx of the lower right corner O'of the inner opening with the lower right corner O of the outer opening as the base point.

The simulation unit 30 includes a heat load calculation unit 32, an openness calculation unit 34, and a brightness calculation unit 36.

The heat load calculation unit 32 has data of a three-dimensional model representing the building to be calculated, the shapes of the plurality of openings of the wall surface 60A, and preset solar radiation information for each setting by the wall surface opening setting unit 26. Based on the above, the heat load due to the direct light of the sun to the building to be calculated is calculated through the plurality of openings of the wall surface 60A. Specifically, the heat load due to the direct light of the sun on the building to be calculated is calculated for each time period of the year at each time zone of the day.

The openness calculation unit 34 is based on the data of the three-dimensional model representing the building to be calculated, the shapes of the plurality of openings of the wall surface 60A, and the indoor position of the person for each setting by the wall surface opening setting unit 26. , Evaluate the feeling of openness felt by a person who sees the wall surface 60A from the interior of the building to be calculated.

As shown in FIG. 8, the openness calculation unit 34 includes a line-of-sight direction determination unit 72, a measurement data acquisition unit 74, a filter application unit 76, and a weighted average unit 78.

The line-of-sight direction determination unit 72 transfers each measurement position in the room to be evaluated from the measurement position to the wall surface based on the data of the three-dimensional model representing the building and the information about the room to be evaluated of the building. A plurality of line-of-sight directions are determined according to a predetermined line-of-sight distribution centered on a reference direction. In the present embodiment, the reference direction is a direction toward a predetermined reference position for the wall surface, and the line-of-sight distribution is a normal distribution centered on the reference direction as shown in FIG. As a result, the closer the line-of-sight direction is to the reference direction, the higher the density of the determined line-of-sight direction, and the farther the line-of-sight direction is from the reference direction, the lower the density of the determined line-of-sight direction (see FIG. 10). Further, there may be a plurality of reference directions. For example, a plurality of reference positions on the wall surface may be set, and a plurality of line-of-sight directions may be determined for each reference position based on the distribution of the line-of-sight with the direction toward the reference position as the reference direction.

The measurement data acquisition unit 74 determines each measurement position in the room to be evaluated by the line-of-sight direction determination unit 72 based on the data of the three-dimensional model representing the building and the information about the room to be evaluated of the building. For each of the plurality of line-of-sight directions, the length from the measurement position to the object in the line-of-sight direction is acquired (see FIG. 11). At this time, as shown in FIG. 11, when the opening of the wall surface exists in the line-of-sight direction, the length to the object in the line-of-sight direction becomes long.

The filter application unit 76 has a range of upper and lower limit values of a predetermined distance for each measurement position in the room to be evaluated with respect to the length to the object acquired in each of the plurality of line-of-sight directions. Apply a filter to convert to be inside. As a result, when the length to the object is very short, such as when there is a floor surface in the line-of-sight direction, the length to the object is changed to the lower limit by applying the filter. If there is an opening on the wall surface in the line-of-sight direction and the length to the object is very long, the length to the object is changed to the upper limit by applying the filter.

The weighted average unit 78 has an opening on the wall surface in the line-of-sight direction in the filter application result for the length to the object acquired for each of the plurality of line-of-sight directions for each measurement position in the room to be evaluated. By multiplying the weighted coefficient according to whether or not it is present and calculating the weighted average, the feeling of openness felt by the person who sees the wall surface at the measurement position is evaluated. Specifically, when there is an opening on the wall surface in the line-of-sight direction, a large predetermined weighting coefficient is applied, while when there is no opening on the wall surface in the line-of-sight direction, the weight is applied. Let the coefficient be 1.

As described above, each process of the line-of-sight direction determination unit 72, the measurement data acquisition unit 74, the filter application unit 76, and the weighted average unit 78 is repeatedly executed for each measurement position in the room to be evaluated.

The brightness calculation unit 36 is a wall surface 60A obtained from the setting by the wall surface opening setting unit 26 and the data of the three-dimensional model representing the building to be calculated for each interior reflectance and the setting by the wall surface opening setting unit 26. Evaluation of the building to be calculated by the sunlight through the multiple openings of the wall surface 60A based on the shape and physical property values of the plurality of openings, the preset solar radiation information, and the interior reflectance. Calculate the brightness in the target room.

Specifically, for a specific time zone in a specific period of the year, the brightness in the brightness image at each position in the room to be evaluated is the brightness in the room of the building to be calculated. Calculate the scale value (NB value). Here, the brightness scale value (NB value) is the value of the brightness of each point in the brightness distribution image and is expressed in 13 steps from 1 to 13 (1 = very dark, 3 =). Dark, 5 = slightly dark, 7 = neither, 9 = slightly bright, 11 = bright, 13 = very bright). For the calculation method of NB value, refer to References (Naofumi Fujita, "Evaluation of Visual Environment in Office Space Incorporating Daylight", Architectural Institute of Japan Conference Academic Lecture Abstracts / Architectural Design Presentation Abstracts, July 20, 2013 Since it is the same as the day), the description is omitted.

The visualization unit 40 visualizes the calculation result by the heat load calculation unit 32, the evaluation result by the openness calculation unit 34, and the calculation result by the brightness calculation unit 36, and outputs the calculation result by the output unit 50.

Specifically, the visualization unit 40 calculates the heat load due to the direct light of the sun to the building to be calculated at each time zone of the day by the heat load calculation unit 32 at each time of the year. The result is visualized and output by the output unit 50. For example, as shown in FIG. 12, by visualizing the heat load due to the direct light of the sun on the building to be calculated at each time of the day at each time of the year by color-coding, 1 It is possible to grasp the heat load at each time and time zone of the year.

The visualization unit 40 visualizes the evaluation result of the openness feeling for each measurement position in the room to be evaluated by the openness feeling calculation unit 34, and outputs it by the output unit 50. For example, as shown in FIG. 13, the distribution of the feeling of openness according to the position in the room can be grasped by visualizing the evaluation result of the feeling of openness for each measurement position in the room by color coding.

The visualization unit 40 visualizes the calculation result of the NB value at each position in the room to be evaluated as the brightness of the room of the building to be calculated by the brightness calculation unit 36, and outputs it by the output unit 50. For example, as shown in FIG. 14, the distribution of brightness in the room can be grasped by visualizing the calculation result of the NB value for each position in the room by color coding.

From the above visualization, the user can determine whether or not the position and shape of each opening of the wall surface 60A are set to effectively use the opening. For example, it is possible to cut off the direct sunlight on July 23, optimize the brightness of the room, and determine whether the feeling of openness felt by the person in the room can be optimized. do.

<Operation of simulation device>
Next, the operation of the simulation device 100 according to the first embodiment of the present invention will be described.

When the data of the three-dimensional model representing the building in which the wall surface having a plurality of openings is installed as the exterior of the building by the input unit 10 and the information about the room to be evaluated of the building are received as inputs, the simulation device 100 displays the figure. The simulation processing routine shown in 15 is executed.

First, in step S100, the building information setting unit 22 sets information about the building to be calculated in the calculation space based on the data of the three-dimensional model representing the building to be calculated.

In step S102, the peripheral building information setting unit 24 sets information about the peripheral buildings of the building to be calculated in the calculation space based on the data of the three-dimensional model representing each building prepared in advance.

In step S104, the wall surface opening setting unit 26 sets information about a plurality of openings on the wall surface of the building to be calculated in the calculation space based on the data of the three-dimensional model representing the building to be calculated.

In step S106, the heat load calculation unit 32 presets the data of the three-dimensional model representing the building to be calculated, the shapes of the plurality of openings of the wall surface 60A set by the wall surface opening setting unit 26, and the shapes of the plurality of openings of the wall surface 60A. Based on the solar radiation information of the sun, the heat load due to the direct light of the sun to the building to be calculated is calculated through the plurality of openings of the wall surface 60A.

In step S108, the openness calculation unit 34 calculates based on the data of the three-dimensional model representing the building to be calculated and the shapes of the plurality of openings of the wall surface 60A set by the wall surface opening setting unit 26. Evaluation of the target building The feeling of openness felt by a person who sees the wall surface 60A from inside the target room is evaluated.

In step S110, the brightness calculation unit 36 has data of a three-dimensional model representing the building to be calculated and a plurality of wall surface 60A set by the wall surface opening setting unit 26 for each interior reflectance given in advance. A room to be evaluated by the building to be calculated by the sunlight through a plurality of openings on the wall surface 60A based on the shape of the opening, the preset solar radiation information, and the interior reflectance. Calculate the brightness inside.

In step S112, the visualization unit 40 visualizes the calculation result by the heat load calculation unit 32, the evaluation result by the openness calculation unit 34, and the calculation result for each interior reflectance by the brightness calculation unit 36, and is output by the output unit 50. do.

Then, in step S114, it is determined whether or not to end the repetitive calculation for other settings of the wall surface opening setting unit 26. When the calculation is repeated for other settings of the wall surface opening setting unit 26, the process returns to step S104. On the other hand, when the repetitive calculation for the other settings of the wall opening setting unit 26 is finished, the simulation processing routine is finished.

As described above, according to the simulation apparatus according to the first embodiment of the present invention, the calculation of the heat load due to the direct sunlight to the building is performed as a simulation when a wall surface having a plurality of openings is installed. It is possible to simultaneously evaluate a feeling of openness and a plurality of viewpoints such as calculation of the brightness of the interior of a building by the sunlight through a plurality of openings on the wall surface. As a result, it is possible to improve the solar radiation shielding performance by the wall surface having a plurality of openings, secure a feeling of openness, and improve the brightness. The feeling of openness can be ensured by quantitatively evaluating the feeling of openness. Further, since the wall surface having a plurality of openings can reflect the reflected light to the ceiling surface and the wall surface to brighten the entire room, the brightness can be improved by calculating the brightness of the room.

[Second Embodiment]
Next, the simulation apparatus according to the second embodiment will be described. The parts having the same configuration as that of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the second embodiment, in order to calculate the evaluation value of the feeling of openness, the first point is that a trained model in which the length to the acquired object is input for each of the plurality of line-of-sight directions is used. It is different from the embodiment of.

<Structure of the simulation device according to the second embodiment of the present invention>
As shown in FIG. 16, the openness calculation unit 234 of the simulation device according to the present embodiment includes a line-of-sight direction determination unit 72, a measurement data acquisition unit 74, a filter application unit 76, a weighting unit 278, and an evaluation unit 280. There is.

The weighting unit 278 determines whether there is an opening on the wall surface in the line-of-sight direction in the filter application result for the length to the object acquired for each of the plurality of line-of-sight directions for each measurement position in the room to be evaluated. Weighting is performed by multiplying by a weighting coefficient according to whether or not. Specifically, when there is an opening on the wall surface in the line-of-sight direction, a large predetermined weighting coefficient is applied, while when there is no opening on the wall surface in the line-of-sight direction, the weight is applied. Let the coefficient be 1.

For each measurement position in the room to be evaluated, the evaluation unit 280 inputs a value obtained by weighting the filter application result for the length to the object acquired in each of the plurality of line-of-sight directions, and looks at the wall surface. Using a trained model for estimating the evaluation value of the feeling of openness felt by a person, the evaluation value of the feeling of openness felt by a person looking at the wall surface at the measurement position is estimated.

The trained model may be trained in advance as follows. For example, it is obtained by multiplying the filter application result for the length from the measurement position to the object obtained for each of a plurality of line-of-sight directions by a weighting coefficient according to whether or not there is an opening on the wall surface in the line-of-sight direction. A pair of the value to be obtained and the evaluation value of the feeling of openness felt by the person looking at the wall surface from the measurement position is prepared as a plurality of learning data, and based on the learning data, up to the object acquired for each of the plurality of line-of-sight directions. We will learn a model that outputs the evaluation value of the feeling of openness that the person who sees the wall surface feels by inputting the weighted value to the filter application result for the length of.

As described above, each process of the line-of-sight direction determination unit 72, the measurement data acquisition unit 74, the filter application unit 76, the weighting unit 278, and the evaluation unit 280 is repeatedly executed for each measurement position in the room to be evaluated. ..

Since other configurations and operations of the simulation apparatus according to the second embodiment are the same as those of the first embodiment, the description thereof will be omitted.

As described above, according to the simulation apparatus according to the second embodiment of the present invention, the trained model is used to accurately evaluate the feeling of openness felt by a person who sees a wall surface having a plurality of openings. be able to.

The present invention is not limited to the above-described embodiment, and various modifications and applications are possible without departing from the gist of the present invention.

For example, the case where the data of the three-dimensional model representing the building is input is described as an example, but the present invention is not limited to this, and the data measured in the actual building may be input.

Further, the program of the present invention may be stored in a storage medium and provided.

10 Input unit 20 Calculation unit 22 Building information setting unit 24 Peripheral building information setting unit 26 Wall opening setting unit 30 Simulation unit 32 Heat load calculation unit 34 Openness calculation unit 36 Brightness calculation unit 40 Visualization unit 50 Output unit 60 Building 60A Wall surface 72 Line-of-sight direction determination unit 74 Measurement data acquisition unit 76 Filter application unit 78 Weighted average unit 100 Simulation device 234 Openness calculation unit 278 Weighting unit 280 Evaluation unit

Claims (3)

A simulation device that simulates the case where a wall surface with multiple openings is installed as the exterior of a building.
A heat load calculation unit that calculates the heat load due to the direct light of the sun to the building through the plurality of openings in the wall surface based on preset solar radiation information.
An openness evaluation unit that evaluates the openness felt by a person looking at the wall surface from inside the building.
A brightness calculation unit that calculates the brightness of the interior of the building by the sunlight through the plurality of openings on the wall surface based on the solar radiation information of the sun.
Simulation equipment including. Further including an opening shape setting portion for repeatedly setting the shape of the plurality of openings on the wall surface.
The heat load calculation unit passes through the plurality of openings on the wall surface based on the shapes of the plurality of openings on the wall surface and the solar radiation information of the sun for each setting by the opening shape setting unit. Calculate the heat load of the direct sunlight on the building and calculate
The openness evaluation unit is set by the person based on the shapes of the plurality of openings on the wall surface and the indoor position of the person who sees the wall surface from the room of the building for each setting by the opening shape setting unit. Evaluate the feeling of openness
The brightness calculation unit sets the wall surface according to the setting by the opening shape setting unit and the interior reflectance based on the shapes of the plurality of openings on the wall surface, the sunlight information of the sun, and the interior reflectance. The simulation apparatus according to claim 1, wherein the brightness of the interior of the building is calculated by the light of the sun through the plurality of openings. The simulation apparatus according to claim 1 or 2, further comprising a visualization unit that visualizes a calculation result by the heat load calculation unit, an evaluation result by the openness evaluation unit, and a calculation result by the brightness calculation unit.

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