JP2020154627A - Heat insulation performance evaluation device - Google Patents

Abstract

To appropriately evaluate the heat insulation performance of a building.SOLUTION: In the heat insulation performance evaluation device 10, a reception unit 40 receives structural information of each part of an outer skin of a steel-framed house, attribute information of each member in the structural information, and building information including heat insulation specifications of the individual parts. A first calculation unit 44 calculates a heat loss amount q1 by using a heat transmission coefficient U for a general part for each part and a linear heat transmission ratio Ψ for a thermal bridge part, and a second calculation unit 46 calculates a heat loss amount q2 using a heat transmission coefficient Us. A heat insulation performance determination unit 56 determines the heat insulation performance of the house based on an average heat transmission coefficient of the outer skin calculated from a heat loss amount q set for each part using a smaller one of the heat loss amount q1 and the heat loss amount q2. As a result, the heat insulating performance of the house can be appropriately evaluated, making it possible to prevent the heat insulation performance of the house from becoming excessive.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heat insulating performance evaluation device for evaluating the heat insulating performance of a building.

Buildings such as houses are required to have heat insulation performance above a specified level (the law concerning improvement of energy consumption performance of buildings (heat insulation performance stipulated in the Building Energy Conservation Law). Therefore, when designing a building, etc. Is to evaluate the insulation performance of the designed building.

Here, the heat insulation performance calculation system for the outer skin of Patent Document 1 calculates the first heat insulation performance of the design factor of the opening using the first heat insulation information which is the heat insulation performance according to a predetermined standard. At the same time, the second heat insulation performance is calculated using the second opening heat insulation information which is the actual heat insulation performance. Further, in the system of Patent Document 1, it is proposed to compare the first heat insulating performance and the second heat insulating performance, and to calculate the heat insulating performance of the exodermis of the building by using the heat insulating performance which is superior in the heat insulating performance. ..

JP-A-2018-731152

By the way, the heat insulation performance of a building is affected not only by the opening but also by the heat loss (heat loss amount) of each part such as the roof (or ceiling), wall, and floor. Therefore, even if the heat insulating performance is evaluated only for the opening, it may not be possible to appropriately evaluate the heat insulating performance of the entire building.

In general, the heat insulation performance of a building is divided into a general part for each part of the outer skin such as the roof (or ceiling), wall, and floor, and a thermal bridge part (heat bridge, etc.) such as a steel frame part, and each part is divided into general parts. On the other hand, the heat transmission coefficient is used, and the linear heat transmission coefficient is used for the thermal bridge portion to calculate the amount of heat loss. In addition, the average heat transmission coefficient of the outer skin calculated from the amount of heat loss of the entire building is used to evaluate the heat insulation performance of the building.

For the calculation of the amount of heat loss, etc. in the evaluation of the heat insulation performance of a building, it is possible to use the calculation method approved in advance by applying to a predetermined organization. From this, a house maker that manufactures a house with a lightweight steel structure such as a steel frame structure obtains a value indicating how heat is transferred per unit area including a thermal bridge part such as a steel frame member as a heat transmission coefficient and manufactures the house. The insulation performance of a house may be evaluated.

In this way, the amount of heat loss and the average heat transmission coefficient of the outer skin calculated by various methods are used to evaluate the heat insulation performance of a house, but if the evaluation of the heat insulation performance is not appropriate, the heat insulation performance will be excessive. It ends up. For this reason, it is desired to evaluate the appropriate heat insulation performance of buildings such as houses.

The present invention has been made in view of the above facts, and an object of the present invention is to provide a heat insulating performance evaluation device capable of appropriately evaluating the heat insulating performance of a building.

The heat insulating performance evaluation device of the first aspect of the present invention for achieving the above object is the structural information of each part of the outer skin of the building having a steel structure, the attribute information of each member in the structural information, and the heat insulating specification of each part. The reception unit that receives the building information including the above, and the first heat transmission coefficient and the linear heat transmission coefficient determined for each part according to the structural information, the attribute information, and the heat insulation specifications for each part are applied. The first calculation for calculating the first heat loss amount for each part by using the first heat transmission coefficient of the part for the general part for each part and the linear heat transmission rate of the part for the thermal bridge part. A second heat transmission coefficient preset as a value of how heat is transferred per unit area including a thermal bridge portion for each part according to the part, the structural information for each part, the attribute information, and the heat insulation specifications. The second calculation unit that calculates the second heat loss amount for each part, and the part that is smaller of the first heat loss amount and the second heat loss amount for each part. It includes an evaluation unit that sets the heat loss amount of the above and evaluates the heat insulation performance of the building based on the heat loss amount set for each part, and an output unit that outputs the evaluation result of the evaluation unit.

In the heat insulating performance evaluation device of the first aspect, the building is targeted for a building having a steel frame structure, and the reception part receives structural information of each part of the outer skin of the building, attribute information of each member in the structural information, and heat insulating specifications of each part. Accepts building information including.

The first calculation unit applies the first heat transmission coefficient and linear heat transmission coefficient determined for each part according to the structural information, attribute information, and heat insulation specifications for each part, and applies the first heat transmission coefficient and linear heat transmission rate for each part to the general part for each part. The first heat loss amount for each part is calculated by using the first heat transmission coefficient and the linear heat transmission coefficient of the relevant part in the thermal bridge portion. In addition, the second calculation unit has a second heat transmission that is preset as a value of how heat is transferred per unit area including the thermal bridge portion for each part according to the structural information, attribute information, and heat insulation specifications for each part. The rate is applied to calculate the second heat loss amount for each part. As a result, the first heat loss amount and the second heat loss amount can be obtained for each part.

The evaluation unit sets the smaller of the first heat loss amount and the second heat loss amount for each part as the heat loss amount for the part, and insulates the building based on the set heat loss amount for each part. The performance is evaluated, and the output unit outputs the evaluation result.

Here, the first calculation unit calculates the first heat loss amount for each part by using the linear heat transmission coefficient for the thermal bridge part such as the steel frame of the skeleton at each part. Further, the second calculation unit calculates the second heat loss amount for each part by using the second heat transmission coefficient set as the value of the heat transfer method per unit area including the thermal bridge part for each part. In addition, the evaluation unit sets the smaller value of the first heat loss amount and the second heat loss amount as the heat loss amount of the portion, and evaluates the heat insulation performance of the building.

As a result, it is possible to prevent the heat insulation performance of the building from being evaluated low (badly), to appropriately evaluate the heat insulation performance of the building, and to prevent the heat insulation performance of the actual building from becoming higher than necessary. it can.

In the first aspect, the heat insulating performance evaluation device of the second aspect evaluates the heat insulating performance of the building based on the average heat transmission coefficient of the outer skin calculated from the heat loss amount set for each part. Including that.

In the heat insulation performance evaluation device of the second aspect, the average heat transmission coefficient of the outer skin of the building is calculated from the set heat loss amount of each part, and the heat insulation performance of the building is evaluated using the calculated average heat transmission coefficient of the outer skin. Here, the average heat transmission coefficient of the exodermis is obtained from the sum of the amount of heat loss with respect to the total area of the outer skin of the building. Therefore, the average heat transmission coefficient of the outer skin is suppressed by suppressing the amount of heat loss set for each part. Can be suppressed from becoming large. As a result, the heat insulating performance of the building can be appropriately evaluated, and it is possible to prevent the heat insulating performance of the building from being evaluated as low (bad).

In the first or second aspect of the heat insulating performance evaluation device of the third aspect, the reception unit receives the orientation information of the building, and the evaluation unit receives the orientation information and the heat set for each part. It includes evaluating the heat insulation performance of each part of the building based on the solar heat gain rate for each part calculated from the amount of loss.

In the heat insulation performance evaluation device of the third aspect, the reception unit receives the orientation information of the building, and the evaluation unit calculates the solar heat acquisition rate from the orientation information and the amount of heat loss for each part, and the calculated solar heat acquisition. Evaluate the insulation performance of each part based on the rate. As a result, the heat insulating performance of each part of the outer skin of the building can be appropriately evaluated. In addition, the evaluation department calculates the solar heat acquisition rate during the heating period of the building and the solar heat acquisition rate during the cooling period of the building from the orientation information and the solar heat acquisition rate for each part, and insulates the building during the heating period and cooling period. Performance may be evaluated.

In the second aspect, the heat insulating performance evaluation device of the fourth aspect calculates the amount of heat loss for each part of the building in contact with the outside air based on the building information, and the total amount of the heat loss is used to calculate the amount of heat loss of the outer skin of the building. The evaluation unit includes a third calculation unit that calculates the average heat transmission coefficient, and the evaluation unit includes an exodermis average heat transmission coefficient calculated from the heat loss amount set for each part and an exodermis average heat transmission calculation calculated by the third calculation unit. It includes evaluating the heat insulation performance of the building using the heat transmission coefficient of the exodermis set from the smaller value of the rate.

In the heat insulation performance evaluation device of the fourth aspect, the third calculation unit calculates the amount of heat loss for each part of the building in contact with the outside air based on the building information, and the average heat transmission coefficient of the outer skin of the building is calculated from the total amount of heat loss. Is calculated. In addition, the evaluation unit uses the exodermis heat transmission coefficient set from the smaller of the exodermis average heat transmission coefficient calculated from the heat loss amount set for each part and the exodermis average heat transmission coefficient calculated by the third calculation unit. Evaluate the insulation performance of the building.

As a result, the heat insulation performance of the building can be evaluated more appropriately using the average heat transmission coefficient of the outer skin of the building, and it is possible to further suppress the evaluation of the heat insulation performance of the building being low (bad).

In the third or fourth aspect in which the heat insulating performance evaluation device of the fifth aspect cites the second and second aspects, the evaluation unit determines the exodermis average heat transmission coefficient and the target exodermis average heat transmission coefficient. Including to evaluate the heat insulating performance of the building by comparison.

In the heat insulating performance evaluation device of the fifth aspect, the evaluation unit compares the average heat transmission coefficient of the outer skin of the building with the average heat transmission coefficient of the outer skin of the target. This makes it possible to easily evaluate whether or not the heat insulating performance of the building satisfies the target heat insulating performance.

In any one of the first to fifth aspects, the heat insulating performance evaluation device of the sixth aspect includes a change receiving unit that accepts a change in the heat insulating specifications of the part of the building, and the evaluation unit is modified. It includes evaluating the heat insulating performance of the building based on the heat insulating specifications.

In the heat insulating performance evaluation device of the sixth aspect, when the change receiving unit receives a change in the heat insulating specification for any part of the building, the heat insulating performance of the building is evaluated according to the changed heat insulating specification. This makes it easy to bring the heat insulation performance of the building closer to the target heat insulation performance.

In any one of the first to sixth aspects of the heat insulating performance evaluation device of the seventh aspect, the evaluation unit is based on the construction unit price set in advance according to the heat insulating specifications of each part. Includes evaluating the construction cost for each.

In the heat insulating performance evaluation device of the seventh aspect, the construction cost (construction cost) corresponding to the heat insulating specification of each part is calculated and evaluated based on the construction unit price set in advance for each heat insulating specification for each part. This makes it possible to set heat insulation specifications that can suppress construction costs while obtaining the target heat insulation performance for the building.

According to the heat insulating performance evaluation device of the first aspect of the present invention, the heat insulating performance of the building is evaluated using the smaller value of the first heat loss amount and the second heat loss amount, so that the heat insulating performance of the building is evaluated. The effect of being able to properly evaluate is obtained.

According to the heat insulating performance evaluation device of the second aspect, the heat insulating performance of the building can be easily evaluated by using the average heat transmission coefficient of the outer skin of the building.

According to the heat insulating performance evaluation device of the third aspect, the effect that the heat insulating performance of each part of the outer skin of the building can be appropriately evaluated can be obtained.

According to the heat insulation performance evaluation device of the fourth aspect, the smaller value of the exodermis average heat transmission coefficient obtained from the heat loss amount for each part and the exodermis average heat transmission rate obtained from the heat loss amount for each part in contact with the outside air. Since the average heat transmission coefficient of the exodermis is used, the effect that the heat insulation performance of the building can be evaluated more appropriately can be obtained.

According to the heat insulating performance evaluation device of the fifth aspect, it is possible to appropriately evaluate whether or not the heat insulating performance of the building satisfies the target heat insulating performance.

According to the heat insulating performance evaluation device of the sixth aspect, the effect that the heat insulating performance of the building can be easily brought close to the target heat insulating performance can be obtained.

According to the heat insulating performance evaluation device of the seventh aspect, it is possible to obtain the effect that the construction cost can be suppressed while obtaining the target heat insulating performance for the building.

It is a functional block diagram of the heat insulation performance evaluation apparatus which concerns on this embodiment. It is a block diagram which shows the schematic structure of the heat insulation performance evaluation apparatus. It is a flow chart which shows the outline of the heat insulation performance evaluation process which concerns on this Embodiment. It is a chart which shows the outline of the heat insulation specification and the heat transmission coefficient for each part. It is a functional block diagram of the heat insulation performance evaluation apparatus which concerns on modification 1. FIG. It is a chart which shows the outline of the heat insulation specification and construction unit price for each part. It is a functional block diagram of the heat insulation performance evaluation apparatus which concerns on modification 2. FIG. It is a flow chart which shows the outline of the heat insulation performance evaluation process which concerns on modification 2.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present embodiment, a detached house having a steel structure (lightweight steel structure) such as a steel frame structure or a steel frame structure is applied as a building. Further, in the present embodiment, a unit type house (not shown) will be described as an example of a detached house having a lightweight steel structure.

In a unit-type house, multiple building units are used. In the building unit, frame columns are arranged at the four corners, the ceiling frame is joined to the upper part of the frame support, and the floor frame is joined to the lower part. It is formed in the shape of a rectangular box frame. The ceiling frame and floor frame include a pair of girders on the wife side (girder ceiling girder and girder floor girder) and a pair of girders on the girder side (wife ceiling girder and girder floor girder), and a plurality of girders are provided between the girder side girders. Beams (ceiling beams and floor beams) are joined to form a substantially ladder shape.

A plurality of building units are arranged vertically and horizontally and vertically, and building units adjacent to each other are connected to form a steel frame rigid frame structure. In a unit-type house, the roof frame is connected to the frame of the steel frame structure. In such a unit-type house, a vibration damping damper as a vibration damping device may be installed in the building unit.

In the building unit, the ceiling is formed by stretching the ceiling plate on the beam of the ceiling frame (ceiling beam) or the ceiling base formed on the beam in the manufacturing factory, and the beam of the floor frame (floor beam). ) Is used as the base, or the joists provided on the beams are used as the base to form the floor. Further, in the building unit, a partition wall is formed and an outer wall is formed according to the floor plan of the house.

In the present embodiment, the heat insulating performance evaluation device 10 is applied to the evaluation of the heat insulating performance of a house having a lightweight steel structure (unit type house). FIG. 1 shows a functional block diagram of the heat insulating performance evaluation device 10 according to the present embodiment, and FIG. 2 shows a schematic configuration (hardware configuration) of the heat insulating performance evaluation device 10 in a block diagram. There is.

As shown in FIG. 2, the heat insulating performance evaluation device 10 includes a personal computer (PC) 12. The personal computer 12 includes a CPU 14, a ROM 16, a RAM 18, and an input / output port 20, which are connected to each other via a bus 22 such as an address bus, a data bus, and a control bus.

Further, the personal computer 12 includes input / output devices such as a display 24, a keyboard 26, and a mouse 28, as well as an HDD (semiconductor memory) 30 as a storage device, a communication interface (communication I / F) 32 as a communication device, and the like. It is connected to the input / output port 20. Further, the personal computer 12 may be connected to a print output device (printer or the like, not shown) via the input / output port 20 or the communication I / F 32.

In the present embodiment, the CAD system 34 may be connected to the personal computer 12 via the communication I / F 32 to enable input / output of data created by the CAD system 34 or the like. Further, in the personal computer 12, the disk drive 36 is connected to the input / output port 20, and the data created by the CAD system 34 or the like may be input via the disk 38 mounted on the disk drive 36.

The personal computer 12 reads the programs stored in the ROM 16 and the HDD 30 by the CPU 14, and executes various processes while using the RAM 18 as the working memory. The ROM 16 and the HDD 30 of the personal computer 12 store various programs executed for evaluating the heat insulating performance of the house. The personal computer 12 functions as the heat insulating performance evaluation device 10 by the CPU 14 reading and executing a program for evaluating the heat insulating performance of the house stored in the ROM 16 and the HDD 30. The program may be acquired via a network to which the communication I / F 32 is connected, or may be acquired via a disk 38 as a portable recording medium, a USB memory as a semiconductor storage medium, or the like.

As shown in FIG. 1, the heat insulating performance evaluation device 10 is formed with a reception unit 40, a storage unit 42, a first calculation unit 44, a second calculation unit 46, and an output unit 48. Further, the heat insulation performance evaluation device 10 is formed with a comparison unit 50, a solar radiation calculation unit 52, an exodermis performance calculation unit 54, and a heat insulation performance determination unit 56 that form an evaluation unit. The storage unit 42 is realized by the HDD 30, and various data are stored in advance in the storage unit 42, and various information (data) received by the reception unit 40 is stored.

The reception unit 40 functions as a reception unit that receives building information and a change reception unit that receives changes and additions of building information. The reception unit 40 can receive information input by operating the keyboard 26 and the mouse 28 based on a predetermined user interface (UI) displayed on the display 24.

The building information includes information used for evaluating the heat insulation performance of the target house, and the building information includes two-dimensional or three-dimensional CAD data created by a CAD system 34 or the like. The CAD data is input from the CAD system 34 or the like, or is recorded and input from the CAD system 34 or the like on the disk 38. Further, the building information may include data input by operating the keyboard 26 or the mouse 28 in addition to the CAD data.

The average heat transmission coefficient UA (W / m ² K) of the outer skin is used to evaluate the heat insulation performance of the house. There is a method using Eq. (1) to calculate the average heat transmission coefficient UA of the outer skin. For evaluation of the heat insulation performance of a house, for example, the average heat transmission coefficient UA of the outer skin is a preset target value (target outer skin average). Whether or not the heat transmission coefficient UAs) is reached is applied.

In addition, Ai is the area (m ² ) of the outer skin part (general part or opening) i, Ui is the heat transmission coefficient (W / m ² K) of the outer skin part, Hi is the temperature difference coefficient of the outer skin part, Lj. Is the length (m) of the thermal bridge, etc. (outer periphery of the thermal bridge and soil floor) j, Ψj is the linear heat transmission coefficient (W / mK) of the thermal bridge, etc. j, and Hj is the temperature difference coefficient of the thermal bridge, etc. , Aenv is the total area of the outer skin (m ² ).

The above equation (1) is a method using the area of the exodermis (exodermis part) of the house, and the numerator is the heat loss (heat loss amount) for each exodermis part and the heat loss (heat loss amount) for the thermal bridge. ) Is shown. In the present embodiment, as one method of calculating the average heat transmission coefficient UA of the outer skin, the heat loss amount qi of each part such as the roof (or ceiling), the wall, and the floor, which is the outer skin, is calculated and calculated for the heat loss amount. The sum of the heat loss amount qi for each part is used. The exodermis includes the foundation of a house and the like, and the amount of heat loss is calculated for the foundation and the like, but in the present embodiment, the description of the foundation and the like will be omitted.

In the present embodiment, the building information includes structural information of each of the roof (or ceiling), wall, floor, etc., which is a part of the exodermis, attribute information of each member including the steel frame member used for each part of the exodermis, and each. Includes site insulation specifications. Further, it is preferable that the building information includes information indicating the orientation of the building. Structural information includes information on the configuration of thermal bridges such as columns (frame columns) and beams (beams and beams) using steel materials in each part of the exodermis, and information on openings such as windows and doors, and attribute information. Includes the shape, dimensions, arrangement, etc. of each member. In addition, the building information including the structural information, attribute information, and heat insulation specifications of each part includes information that can specify information indicating how heat is transferred in each part.

Information indicating how heat is transferred in each part includes the heat transmission coefficient U (W / m ² K) of the general part (general part or opening excluding the thermal bridge part) in each part of the outer skin, and the thermal bridge part (W / m ² K). contains the parameters of the linear thermal transmission coefficient of thermal bridges, etc.) Ψ (W / mK), it may include parameters such as correction heat transmission coefficient ^{Ur (W / m 2 K)} . These information (each parameter) may be included in the CAD data, may be input separately from the CAD data by operating the keyboard 26, the mouse 28, or the like, or may be stored in advance in the storage unit 42.

On the other hand, for the calculation of the amount of heat loss of each part, there is a method of applying to a predetermined public institution (for example, National Research and Development Corporation Building Research Institute) and using an approved calculation formula (or calculation method). As a method different from the above-mentioned method of calculating the average heat transmission coefficient UA of the outer skin, in the present embodiment, the heat transmission coefficient Us (W) as the second heat transmission coefficient, which is a numerical value replacing the heat transmission coefficient Ui for each part. / ^m 2 K) to apply.

In the present embodiment, as information used for evaluating the heat insulation performance, in addition to the above parameters, heat transmission is a value of how heat is transferred per unit area including a thermal bridge portion (thermal bridge, etc.) for each part of the exodermis. The rate Us (W / m ² K) is calculated in advance, obtained, and stored in the storage unit 42.

As a result, the first calculation unit 44 and the second calculation unit 46 calculate the heat loss amount q for each part by using different methods. In the first calculation unit 44, the heat transmission coefficient U is applied as the first heat transmission coefficient of each part, and the heat transmission rate U (may include the corrected heat transmission rate Ur) and the linear heat transmission rate Ψ for each part are Used, the heat loss amount q ₁ (heat loss amount per unit temperature difference (W / K)) as the first heat loss amount is calculated for each part. Further, in the second calculation unit 46, the heat transmission coefficient Us stored in the storage unit 42 is used to calculate the heat loss amount q ₂ (W / K) as the second heat loss amount for each part. To.

The comparison unit 50, for each region of the skin, the heat loss calculated by the first calculation unit 44 q ₁ and the heat loss q ₂ calculated by the second calculating section 46 is compared, it is either smaller The heat loss amount q of the relevant part is set. The solar radiation calculation unit 52 calculates the solar heat acquisition rate η for each part of the target house based on the heat loss amount q for each part. Further, the solar radiation calculation unit 52 may calculate the solar heat acquisition rate ηh in the heating period of the house and the solar heat acquisition rate ηc in the cooling period of the house.

Further, the outer skin performance calculation unit 54 calculates the total amount of heat loss of the target house from the amount of heat loss q for each part (the total amount of heat loss of the outer skin part and the total amount of heat loss of the thermal bridge, etc.). The average heat transmission coefficient UA of the outer skin of the house is calculated.

The heat insulating performance determination unit 56 determines whether or not the outer skin average heat transmission coefficient UA calculated by the outer skin performance calculation unit 54 has reached a preset target value (target outer skin average heat transmission coefficient UAs). Will be done. At this time, the heat insulating performance determination unit 56 determines (evaluation) that the target heat insulating performance of the house is satisfied when the average heat transmission coefficient UA of the outer skin is equal to or less than the average heat transmission coefficient UAs (UA ≤ UAs) of the outer skin. To do. Further, in the heat insulating performance determination unit 56, when the average heat transmission coefficient UA of the outer skin exceeds the average heat transmission coefficient UAs of the outer skin (UA> UAs), the heat insulating performance targeted by the house is not reached (not satisfied). Judgment (evaluation).

Further, the heat insulating performance determining unit 56 determines whether or not the solar heat acquisition rate η satisfies a preset target value for each part of the outer skin of the target house. In addition, the heat insulation performance determination unit 56 obtains the solar heat acquisition rate ηh in the heating period and the solar heat acquisition rate ηc in the cooling period from the solar heat acquisition rate η of each part of the outer skin, and these values. Determines whether or not meets the preset target value (reference value) (whether or not the target value is reached). In addition, the value set for each part of the house is applied to each target value.

The output unit 48 is achieved by a print output device such as a printer connected to the display 24 or the input / output port 20, a disk 38 mounted on the disk drive 36, and the like. The output unit 48 outputs the determination result of the heat insulation performance determination unit 56 as the evaluation result of the heat insulation performance of the target house. Further, the output unit 48 uses the calculation result of the first calculation unit 44 (heat loss amount q ₁ ), the calculation result of the second calculation unit (heat loss amount q ₂ ), and the comparison result of the comparison unit 50 for each part (each). The heat loss amount q) of the part, the solar heat acquisition rate η of each part calculated by the solar radiation calculation unit 52, the outer skin average heat transmission coefficient UA calculated by the outer skin performance calculation unit 54, and the like may be output. The output unit 48 may output a determination result or the like based on a request from an external processing terminal connected to the personal computer 12 via the communication I / F 32.

Next, as the operation of the present embodiment, the heat insulating performance evaluation process in the heat insulating performance evaluation device 10 will be described with reference to FIG. FIG. 3 is a flow chart showing an outline of the heat insulating performance processing executed by the heat insulating performance evaluation device 10.

The heat insulation performance evaluation device 10 executes the flowchart of FIG. 3 in a state where predetermined data is stored in the storage unit 42 in advance. In the first step 100, the building information of the target house is input, the input building information is received, and the received building information is stored in the storage unit 42 (step 102). As a result, various data that can be used for each of the first calculation unit 44, the second calculation unit 46, the solar radiation calculation unit 52, the exodermis performance calculation unit 54, and the heat insulation performance determination unit 56 are stored in the storage unit 42.

Generally, as the average heat transmission coefficient UA of the outer skin of a house, the heat loss amount qi (W / K) of each part such as a roof (or ceiling), a wall, and a floor is used. The amount of heat loss qi in each part is obtained from the amount of heat loss in the general part (general part or opening) and the amount of heat loss in the thermal bridge part, and the amount of heat loss in the general part is the heat transmission coefficient Ui ( Obtained from W / m ² K) and the area S (m ² ) of the general part, the amount of heat loss of the thermal bridge part is the linear heat transmission coefficient Ψj (W / mK) for each thermal bridge part and for each thermal bridge part. Obtained from length Lj (m). The linear heat transmission coefficient Ψj can be derived from the found area of the steel column and the beam and the thermal resistance of the exterior material and the heat insulating reinforcing material. Further, the heat transmission coefficient Ui of each portion is corrected by using the corrected heat transmission coefficient Ur (W / m ² K) derived from the thermal resistance between the exterior material and the heat insulating reinforcing material.

In step 104 (first calculation unit 44), for each part, the heat transmission coefficient Ui of the general part i of the part, the corrected heat transmission rate Ur of the general part i, the target area S of the general part, and the linear heat of the thermal bridge part j. The heat loss amount qi is calculated using the transmission coefficient Ψj and the length of the thermal bridge portion j (thermal bridge portion length) Lj (see equation (2)).
q ₁ = qi = (Ui + Ur) × S + Ψj × Lj ・ ・ ・ (2)

Further, the storage unit 42 stores the heat transmission coefficient Us calculated by using a calculation formula approved in advance as a numerical value indicating how heat is transferred per unit area including the thermal bridge portion. FIG. 4 is a chart showing a part of the data calculated based on the approved calculation formula and stored in the storage unit 42.

The numerical value indicating how heat is transferred per unit area including the thermal bridge part differs depending on the structure of each part, the members used, the heat insulation specifications, and the like. In addition, the heat insulation specifications are determined by the combination of the heat insulation material used, the heat insulation structure (construction method of the heat insulation material), the outer wall material, the interior material, etc., and the heat transmission specifications are different even in the same part, so that heat transmission flows The rate Us is different.

As shown in FIG. 4, the heat transmission coefficient Us (Usi) is calculated and set for each part such as the roof (or ceiling), wall, and floor for each structure and each heat insulation specification. It should be noted that, for example, the structure and the like of the wall and the like are different from the case where the vibration damping damper is not provided in the construction of the heat insulating material because the vibration damping damper or the like is installed inside. For such a portion, the heat transmission coefficient Us is calculated and set as a special portion separately from the general portion.

In step 106 (second calculation unit), the heat loss amount qi, which is the heat loss amount q ₂ of each part, is calculated using the heat transmission coefficient Us (Usi) stored in the storage unit 42. Equation (3) is used to calculate the amount of heat loss qi (q ₂ ). The area S (m ² ) is the area including the general part i and the thermal bridge part (found area) j for each part.
q ₂ = qi = Usi × S ・ ・ ・ (3)

As a result, in step 104, the heat loss amount q ₁ is acquired in association with the heat transmission coefficient Ui for each part, and in step 106, the heat loss amount q ₂ is acquired in association with the heat transmission rate Usi for each part. To. In step 108, the heat loss amount q ₁ and the heat loss amount q ₂ are compared for each part, and the smaller value of the heat loss amounts q ₁ and q ₂ is set as the heat loss amount q of the part.

The next steps 110 and 112 may be executed in parallel or in sequence. In step 110, the solar heat acquisition rate η and the like are calculated for the portion that receives the solar radiation. The solar heat acquisition rate η is obtained by multiplying the heat transmission coefficient U of the relevant portion by a preset coefficient. As the heat transmission coefficient U, a value (heat transmission coefficient Ui or heat transmission coefficient Usi) corresponding to the heat loss amount q set for the relevant portion is used.

Further, in step 110, the solar heat acquisition rate ηh in the heating period and the solar heat acquisition rate ηc in the cooling period of the target house are calculated from the solar heat acquisition rate η of each part. The solar heat acquisition rate ηh in the heating period is calculated from the solar heat acquisition amount mh in the heating period and the target area A (ηh = mh / A), and the solar heat acquisition rate ηc in the cooling period is the cooling of each part. It is calculated from the solar heat gained amount mc of the period and the target area A (ηc = mc / A).

The amount of solar heat gained in the heating period for each part is obtained from the target area A of the part, the solar heat gain rate η, and the orientation coefficient vh in the heating period of the part, and the amount of solar heat gained mh in the heating period is each part. It is calculated as the total amount of solar heat gained during the heating period. Further, the amount of solar heat gained in the cooling period for each part is obtained from the target area A of the part, the solar heat gain rate η, and the orientation coefficient vc in the cooling period of the part, and the amount of solar heat gained mc in the cooling period is It is calculated as the total amount of solar heat gained during the heating period of each part. The azimuth coefficients vh and vc are stored in the storage unit 42 in advance, and are determined for each part by inputting a direction according to building information or the like. Such a solar heat acquisition rate η, a solar heat acquisition rate ηh in the heating period, and a solar heat acquisition rate ηc in the cooling period are calculated by known methods.

In step 112, the average heat transmission coefficient UA of the outer skin of the target house is calculated from the heat loss amount q of each set portion and the total area Sa of the outer skin (UA = q / Sa).

In step 114, the calculated exodermis average heat transmission coefficient UA is compared with the exodermis average heat transmission coefficient UAs that can obtain the target heat insulation performance, and it is determined (evaluated) whether or not the house satisfies the target heat insulation performance. ). The target exodermis average heat transmission coefficient UAs may be a value based on the energy saving standard corresponding to the detached house, or may be a standard value set by the house maker or the like in consideration of the product quality.

Further, in step 114, the solar heat acquisition rate η of each part, the solar heat acquisition rate ηh in the heating period of the house, and the solar heat acquisition rate ηc in the cooling period of the house are determined. This determination is made by comparing preset target values, and the solar heat acquisition rate η of each part, the solar heat acquisition rate ηh during the heating period of the house, and the solar heat acquisition rate ηc during the cooling period of the house. It is judged whether or not each of the above has reached the target value. The target values of the solar heat acquisition rate η of each part, the solar heat acquisition rate ηh during the heating period of the target house, and the solar heat acquisition rate ηc during the cooling period of the target house are set by the housing manufacturer. The standard value that is set can be applied.

After that, in step 116, the determination result (evaluation result) is output from the output unit 48. The determination result is output when the average heat transmission coefficient UA of the outer skin is equal to or less than the average heat transmission coefficient UA of the outer skin, and the target house satisfies the target heat insulation performance. Further, when the average heat transmission coefficient UA of the outer skin is larger than the average heat transmission coefficient UA of the outer skin, the determination result is output as not satisfying the target heat insulation performance of the target house.

In addition, the output judgment results are the solar heat acquisition rate η of each part, the solar heat acquisition rate ηh in the heating period of the house, the solar heat acquisition rate ηc in the cooling period of the house, and whether or not each of them reaches the target value. Kagami may be included. In step 116, for each part, the heat insulation specifications for each part, the calculation result of the first calculation unit 44 (heat loss amount q ₁ ), the calculation result of the second calculation unit (heat loss amount q ₂ ), and the comparison unit. The comparison results of 50 (heat loss amount q of each part) and the like may be combined and output.

On the other hand, in step 118, it is confirmed whether or not to change the heat insulation specification of any part of the target house. For example, if it is evaluated from the output judgment result that the target house does not meet the target heat insulation performance, it is necessary to change the heat insulation specifications so that the target house meets the target heat insulation performance. .. In addition, even if the target house is evaluated to meet the target heat insulation performance, if the exodermis average heat transmission coefficient UA is different from the exodermis average heat transmission rate UAs, the insulation specifications will be used. There is room for change.

Furthermore, even if the target house is evaluated to meet the target heat insulation performance, the solar heat acquisition rate η of each part, the solar heat acquisition rate ηh during the heating period of the target house, and In some cases, one of the solar heat gain rates ηc during the cooling period of the target house has not reached the target.

From here, when a change in the heat insulation specification is instructed, an affirmative determination is made in step 118 and the process proceeds to step 120. If the heat insulation specifications are not changed (when no change instruction is input), or if the evaluation of the heat insulation performance of the target house is completed, a negative determination is made in step 118 and the process is terminated.

In step 120, for example, when the keyboard 26 or the mouse 28 is operated based on the UI (user interface) displayed on the display 24 and a change in heat insulation specifications is input for at least one of the parts, the change is made. We accept heat insulation specifications. After that, by returning to step 102, the heat insulation performance of the target house is re-evaluated based on the changed heat insulation specifications. Further, when the target heat insulating performance of the target house is not reached, step 118 may be omitted and the process proceeds to step 120 to accept changes in the heat insulating specifications and the like. In addition, when the structural information and attribute information of the relevant part are changed due to the change of the heat insulating specification, the structural information and the attribute information are changed together with the heat insulating specification.

In this way, in the heat insulation performance evaluation device 10, the first calculation unit 44 and the second calculation unit 46 calculate the heat loss amounts q ₁ and q ₂ that can be applied to the evaluation of the heat insulation performance, respectively, and the calculated heat loss amount q. _The smaller value of ₁ and q ₂ is set as the heat loss amount q of the relevant portion. As a result, it is possible to suppress an increase in the heat loss amount q for each part of the exodermis, and it is possible to evaluate an appropriate heat insulating performance using the heat loss amount q for each part of the exodermis.

Further, the heat insulating performance evaluation device 10 calculates the average heat transmission coefficient UA of the outer skin of the target house, and compares the calculated average heat transmission coefficient UA of the outer skin with the average heat transmission coefficient UA of the outer skin. As a result, the heat insulating performance of the target house can be evaluated more appropriately, and it is possible to prevent the heat insulating performance of the target house from becoming excessive.

Further, since the heat insulation performance evaluation device 10 can output the heat loss amount q and the like for each part, the heat insulation performance of each part of the outer skin of the house can be easily grasped. Further, the heat insulating performance evaluation device 10 can output the solar heat acquisition rate η for each part of the outer skin, and also output the solar heat acquisition rate ηh in the heating period and the solar heat acquisition rate ηc in the cooling period. For this reason, it becomes easy to grasp the solar radiation performance of each part of the exodermis of the target house, and it is possible to easily grasp the heat insulation performance of the heating period and the cooling period of the house. As a result, for example, when the heat insulating performance of a house becomes excessive or the heat insulating performance is insufficient, it becomes easy to grasp the part (insulation specification) that causes the heat insulation performance of each part. it can.

Further, in the heat insulating performance evaluation device 10, by changing the heat insulating specifications of any part, it is possible to re-evaluate the heat insulating performance of the house based on the changed heat insulating specifications. Therefore, if it is evaluated that the target heat insulation performance is not satisfied, the heat insulation specifications can be changed so that the target heat insulation performance can be obtained, and the heat insulation performance of the target house satisfies the target heat insulation performance. Insulation specifications can be changed to prevent excessively high insulation performance. As a result, the heat insulation specifications of each part of the house can be determined so that appropriate heat insulation performance can be obtained.

[Modification 1]
Next, a modification 1 of the present embodiment will be described.
FIG. 5 shows a schematic configuration of the heat insulating performance evaluation device 60 according to the first modification in a functional block diagram. The heat insulating performance evaluation device 60 according to the modified example 1 has the same basic configuration as the heat insulating performance evaluation device 10, and the heat insulating performance evaluation device 60 has the same configuration as the heat insulating performance evaluation device 10 in the modified example 1. The same reference numerals as 10 are given and detailed description thereof will be omitted.

As shown in FIG. 5, the heat insulation performance evaluation device 60 is provided with a cost calculation unit 62, and the heat insulation performance evaluation device 60 is different from the heat insulation performance evaluation device 10 in that it has the cost calculation unit 62. The cost calculation unit 62 calculates the construction cost corresponding to the heat insulation specification for each part of the outer skin of the house. Further, in the heat insulating performance evaluation device 60, the construction cost for each of the heat insulating specifications of each part is calculated in advance and stored in the storage unit 42. In FIG. 6, a part of the data stored in advance in the storage unit 42 in the first modification is shown in a chart.

As shown in FIG. 6, the storage unit 42 stores a plurality of heat insulating specifications set for each structure for each part of the outer skin of the house and the construction unit price calculated for each heat insulating specification. The construction unit price is converted into the construction cost (construction cost) per unit area when the construction of the corresponding heat insulation specifications is performed.

The cost calculation unit 62 calculates the construction cost (construction cost) of each part from the construction unit price corresponding to the heat insulation specification and the target area. The output unit 48 outputs the heat insulation specifications and the construction cost for each part together with the determination result of the heat insulation performance of the house.

In addition, the heat insulation performance evaluation device 60 determines the heat insulation performance based on the changed heat insulation specification by changing the heat insulation specification, and includes the portion where the heat insulation specification is changed together with the judgment result of the heat insulation performance of the house. Output the heat insulation specifications and construction cost of each part. As a result, the heat insulation performance evaluation device 60 can output the determination result of the heat insulation performance for each heat insulation specification and the construction cost for the heat insulation specification for the target house.

Houses for which heat insulation performance is evaluated (target houses) include houses for which construction is requested by customers. The heat insulation performance evaluation device 60 can present to the customer a determination result of the heat insulation performance for each heat insulation specification and a list of construction costs for the heat insulation specification for the target house. As a result, the customer can select the heat insulating specification in consideration of the construction cost and the heat insulating performance.

[Modification 2]
Next, a modification 2 of the present embodiment will be described.
FIG. 7 shows a schematic configuration of the heat insulating performance evaluation device 70 according to the modified example 2 in a functional block diagram, and FIG. 8 shows an outline of the heat insulating performance evaluation process according to the modified example 2 in a flow diagram. There is. The heat insulating performance evaluation device 70 according to the modified example 2 has the same basic configuration as the heat insulating performance evaluation device 10, and the heat insulating performance evaluation device 70 has the same configuration as the heat insulating performance evaluation device 10 in the modified example 2. The same reference numerals as 10 are given and detailed description thereof will be omitted.

As shown in FIG. 7, the heat insulating performance evaluation device 70 is provided with a first comparison unit 72 instead of the comparison unit 50. Further, the heat insulation performance evaluation device 70 is provided with a third calculation unit 74 and a second comparison unit 76, and is provided with a heat insulation performance determination unit 78 instead of the heat insulation performance determination unit 56. In the heat insulation performance evaluation device 70, the solar radiation calculation unit 52 is omitted.

First comparing section 72, a comparing unit 50 heat loss q ₁ calculated by the first arithmetic unit 44 for each part functioning similarly to the heat loss quantity q ₂ calculated by the second arithmetic unit 46 For comparison, the smaller value is set as the heat loss amount q of the relevant portion. The exodermis performance calculation unit 54 calculates the exodermis average heat transmission coefficient UA (hereinafter referred to as exodermis average heat transmission coefficient UA ₁ ) based on the heat loss amount q of each part.

The third calculation unit 74 uses a method different from calculating the exodermis average heat transmission coefficient UA ₁ from the calculation results of the first calculation unit 44 and the second calculation unit 46, and uses a method different from the calculation of the exodermis average heat transmission coefficient UA ₁ of the house having a lightweight steel structure. The transmission rate UA (hereinafter referred to as the exodermis average heat transmission rate UA ₂ ) is calculated.

There is a method of calculating the average heat transmission coefficient UA of the outer skin for a wooden detached house without using the area of the outer skin or the like. The third calculation unit 74 calculates the exodermis average heat transmission coefficient UA ₂ by using the same method as that for a house having a lightweight steel structure without using the area of the exodermis, which is a calculation method for a wooden detached house. To do.

In the second modification, the unit type house (house with a lightweight steel structure) is regarded as a standard dwelling unit. The third calculation unit 74 is the exodermis heat loss amount (heat loss amount) per unit temperature difference of each part in contact with the outside air (the part in contact with the outside air for each part of the exodermis) in each direction of the house (standard dwelling unit). Calculate Q (W / K). Further, the third calculation unit 74 has a second outer skin average heat transmission coefficient from the total of the calculated heat loss amount Q and the area of the outer skin portion (the portion in contact with the outside air) in the house (area A'env (m ² )). The average heat transmission coefficient UA ₂ of the exodermis is calculated as (see equation (4)).
UA ₂ = Q / A'env ・ ・ ・ (4)

The amount of heat loss Q includes the area of the general part such as the roof (or ceiling), wall (general part and opening), and floor that covers the entire circumference of the house and the temperature difference coefficient for each part. The amount of heat loss calculated for each part in the general part is included from H and the heat transmission coefficient U for each part. In addition, the heat loss amount Q includes the length of the thermal bridge, etc. (foundation, etc.) in contact with the outside air over the entire circumference of the house, the temperature difference coefficient H for each thermal bridge, and the line for each thermal bridge, etc. The amount of heat loss calculated for each thermal bridge, etc. from the heat transmission coefficient Ψ is included. As the heat loss amount Q, the sum of the heat loss amount calculated for each part in the general part and the heat loss amount calculated for each thermal bridge or the like is applied.

Each part of the calculation target of the amount of heat loss, the thermal bridge, etc. is the part in contact with the outside air, and the target area or length is the area (sum of the areas in each direction) or the length (sum of the areas in each direction) over the entire circumference of the house. It is the sum of the lengths of each direction).

For example, the amount of heat loss (W / K) of the roof as a general part is (roof area Aroof (m ² )) × (roof temperature difference coefficient Hroof) × (roof heat transmission coefficient Uroof (W / m ² )). Calculated from K)). The heat loss amount (W / K) of the wall as a general part is (sum of areas in each direction (m ² )) × (temperature difference coefficient Hwall of the wall) × (heat transmission coefficient Ubase (W / K) of the wall). Calculated from m ² K)). Thermal bridges and the like have foundations, and the foundations include entrance foundations, bathroom foundations, and other foundations (excluding entrance foundations and bathroom foundations). For example, the amount of heat loss (W / K) of the other foundation is (the length of the part of the other foundation in contact with the outside air (sum of the lengths in each direction) (m)) × (the temperature difference coefficient of the other foundation). Hbase) × (Linear heat transmission coefficient Ψbase (W / mK) of other foundations).

The temperature difference coefficient H of each part and the thermal bridge is set in advance and stored in the storage unit 42. Further, the heat transmission coefficient U of each part and the linear heat transmission coefficient Ψ of the thermal bridge or the like are set by being calculated in advance and input as building information or are associated with the building information and stored in the storage unit 42 in advance. Be remembered.

The second comparison unit 76 compares the exodermis average heat transmission coefficient UA ₁ with the exodermis average heat transmission coefficient UA ₂ . Further, the second comparison unit 76 sets the exodermis average heat transmission coefficient UA ₁ and the exodermis average heat transmission coefficient UA ₂ whichever is smaller as the outer skin average heat transmission coefficient UA of the house. The heat insulating performance determination unit 78 determines whether or not the average heat transmission coefficient UA of the outer skin of the house has reached the target average heat transmission coefficient UA of the outer skin.

As shown in FIG. 8, when the building information of the target house is input, the heat insulation performance evaluation device 70 receives the input building information (step 100) and stores the received building information in the storage unit 42. (Step 102). After that, the heat loss amount q ₁ and the heat loss amount q ₂ are calculated for each part of the target house (steps 104 and 106), and the heat loss amount for each part is calculated from the heat loss amounts q ₁ and q ₂ for each part. q is set (step 108), and the average heat transmission coefficient UA ₁ of the outer skin of the target house is calculated (step 130).

In step 132 (third calculation unit 74), the exodermis average heat transmission coefficient UA ₂ is calculated. As a result, the exodermis average heat transmission coefficient UA ₁ and UA ₂ calculated by different methods can be obtained.

In the next step 134, the exodermis average heat transmission coefficient UA ₁ and the exodermis average heat transmission coefficient UA ₂ are compared. Further, in step 134, the smaller of the exodermis average heat transmission coefficient UA ₁ and the exodermis average heat transmission coefficient UA ₂ is set to the exodermis average heat transmission coefficient UA of the target house.

After that, in step 136, the heat insulation performance of the target house is determined using the set exodermis average heat transmission coefficient UA, and in step 116, the determination result is output from the output unit 48.

Here, the smaller of the exodermis average heat transmission coefficient UA ₁ and the exodermis average heat transmission coefficient UA ₂ is applied to the exodermis average heat transmission coefficient UA that applies the heat insulation performance of the house to the evaluation. Therefore, when evaluating the heat insulating performance of a house, it is possible to suppress an increase in the average heat transmission coefficient UA of the outer skin. As a result, the heat insulating performance evaluation device 70 can more appropriately evaluate the heat insulating performance of the target house, and can prevent the heat insulating performance of the target house from becoming excessive.

Further, the average heat transmission coefficient UA ₁ of the exodermis is calculated by using a smaller value from the heat loss amount q ₁ and the heat loss amount q ₂ for each part. As a result, the heat insulating performance evaluation device 70 can more appropriately evaluate the heat insulating performance of the target house, and can further suppress the excessive heat insulating performance of the target house.

In the heat insulation performance evaluation device 70 of the second modification, the outer skin average heat transmission coefficient UA ₁ to be compared with the outer skin average heat transmission coefficient UA ₂ is calculated by the first calculation unit 44 as the heat loss amount q ₁ and the _first . 2 Calculated from the heat loss amount q set by comparing with the heat loss amount q ₂ calculated by the calculation unit 46. However, in the heat insulation performance evaluation device, one of the first calculation unit and the second calculation unit is omitted, and the heat loss amount calculated by the other of the first calculation unit and the second calculation unit is used to obtain the average heat transmission coefficient of the outer skin. You may calculate UA ₁ .

In addition, the heat insulation performance evaluation device omits the first calculation unit and the second calculation unit, and uses the exodermis heat transmission coefficient calculated by the third calculation unit as the exodermis heat transmission coefficient of the target house. You may evaluate the heat insulation performance of.

Further, in the present embodiment, the modified example 1 and the modified example 2, the first calculation unit 44 uses the heat transmission coefficient U of the relevant portion for the general portion and the linear heat transmission to the thermal bridge portion for the calculation of the heat loss amount q _1. Using the rate Ψ, the heat transmission coefficient Us was used in the calculation of the heat loss amount q ₂ in the second calculation unit 46. However, the first calculation unit and the second calculation unit may be any as long as they calculate the amount of heat loss for each part by different methods.

10, 60, 70 Insulation performance evaluation device 30 HDD (storage unit)
34 CAD system 40 Reception department (reception department, change reception department)
42 Storage unit 44 1st calculation unit 46 2nd calculation unit 48 Output unit 50 Comparison unit (evaluation unit)
52 Solar radiation calculation unit (evaluation unit)
54 Exodermis performance calculation unit (evaluation unit)
56, 78 Insulation performance judgment unit (evaluation unit)
62 Cost calculation unit 72 First comparison unit (evaluation unit)
74 Third calculation unit 76 Second comparison unit (evaluation unit)

Claims (7)

A reception section that receives structural information of each part of the outer skin of a steel-framed building, attribute information of each member in the structural information, and building information including heat insulation specifications of each part.
The first heat transmission coefficient and the linear heat transmission coefficient determined for each part according to the structural information, the attribute information, and the heat insulation specifications for each part are applied, and the general part of each part is covered with the said part. A first calculation unit that calculates the first heat loss amount for each part by using the first heat transmission coefficient and the linear heat transmission coefficient of the relevant part in the thermal bridge part,
A second heat transmission coefficient set in advance as a value of heat transfer per unit area including a thermal bridge is applied to each part according to the structural information, attribute information, and heat insulation specifications for each part. , A second calculation unit that calculates the second heat loss amount for each part,
The smaller value of the first heat loss amount and the second heat loss amount is set as the heat loss amount of the part for each part, and the building is based on the heat loss amount set for each part. Evaluation department that evaluates the heat insulation performance of
An output unit that outputs the evaluation result of the evaluation unit and
Insulation performance evaluation device including. The evaluation unit evaluates the heat insulation performance of the building based on the average heat transmission coefficient of the outer skin calculated from the heat loss amount set for each part.
The heat insulating performance evaluation device according to claim 1. The reception section receives the orientation information of the building and receives
The evaluation unit evaluates the heat insulation performance of each part of the building based on the azimuth information and the solar heat acquisition rate for each part calculated from the heat loss amount set for each part.
The heat insulating performance evaluation device according to claim 1 or 2. A third calculation unit that calculates the amount of heat loss for each part of the building in contact with the outside air based on the building information and calculates the average heat transmission coefficient of the outer skin of the building from the total amount of the heat loss is included.
The evaluation unit determines the exodermis heat transmission coefficient set from the smaller of the exodermis average heat transmission coefficient calculated from the heat loss amount set for each part and the exodermis average heat transmission coefficient calculated by the third calculation unit. To evaluate the insulation performance of the building,
The heat insulating performance evaluation device according to claim 2. Claim 2 and claim 3 quoting claim 2, wherein the evaluation unit evaluates the heat insulation performance of the building by comparing the average heat transmission coefficient of the outer skin with the target average heat transmission coefficient of the outer skin. Alternatively, the heat insulating performance evaluation device according to claim 4. Including a change reception part that accepts changes in the heat insulation specifications of the part of the building.
The evaluation unit evaluates the heat insulation performance of the building based on the changed heat insulation specifications.
The heat insulating performance evaluation device according to any one of claims 1 to 5, which includes the above. The evaluation unit evaluates the construction cost for each part based on the construction unit price set in advance according to the heat insulation specifications of each part.
The heat insulating performance evaluation device according to any one of claims 1 to 6, which includes the above.