Design support system

Abstract

To provide a design support system capable of improving design efficiency by supporting selection of outer skin design and facility equipment necessary for achieving energy performance targeted by a building.SOLUTION: The design support system 1 executes a first calculation step of calculating a target design primary energy consumption amount Et of a building, a second calculation step (S112) of deriving a relationship between a design primary energy consumption amount and an air conditioning capacity by using a property database DB for a plurality of existing buildings and calculating a target air conditioning capacity Q t or Qta corresponding to the target design primary energy consumption amount E t as a design target value on the basis of the relationship, and a third calculation step (S15) of calculating a thermal load of the building and a design air conditioning capacity Q d corresponding to the thermal load from the skin information. The design air conditioning capacity Qd and the target air conditioning capacity Qt or Qta are displayed.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a design support system, and more particularly to a design support system that supports the design of the building envelope. [Background technology]

[0002] Conventionally, a predetermined energy-saving performance (e.g., BEI) is required in the design of a building. In relation to such a requirement for energy-saving performance, Japanese Patent No. 6049681 (Patent Document 1) discloses a technology for automatically and efficiently performing heat load calculations such as air-conditioning heat load calculations, envelope performance calculations, and primary energy consumption calculations using three-dimensional design data of a building. In addition, Japanese Patent Laid-Open No. 2023-147393 (Patent Document 2) discloses a technology for easily predicting the energy-saving performance (BEI) of a building using multiple regression analysis even if not all items of input information have been entered. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6049681 [Patent Document 2] Japanese Patent Application Laid-Open No. 2023-147393 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional design methods, when designing a building, the envelope is generally designed, then the building equipment is selected, and the energy consumption of the designed building is considered. However, if it is found at this stage that the energy performance is not satisfactory, the envelope must be reselected, which creates a problem of pressure on the design time.

[0005] However, the technologies disclosed in Patent Documents 1 and 2 did not solve the above problems. That is, the technology disclosed in Patent Document 1 simply automatically calculates heat load and is not directly useful for studying ways to reduce energy consumption in buildings. Furthermore, the device disclosed in Patent Document 1 required detailed input information for heat load calculations, and it took a long time to obtain the calculation results.

[0006] On the other hand, the technology of Patent Document 2 has the advantage of being able to predict the energy efficiency index (BEI) even if all items of input information have not been input, but it is only capable of predicting the BEI and is not directly useful for considering ways to reduce energy consumption, as with the device of Patent Document 1. In particular, Patent Document 2 does not indicate the design values ​​required to achieve the target energy efficiency, and there may be cases where the minimum required input information cannot be input at an early stage, such as when planning and designing the building.

[0007] Therefore, the present invention aims to provide a design support system that can support the selection of the envelope design and equipment necessary to achieve the target energy performance of a building, thereby improving design efficiency. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a design support system for building envelope design, comprising: a data providing unit that provides data related to the building; a design target value estimating unit that estimates design target values ​​of the building; a design editing unit that allows a user to edit the building envelope information; and an envelope calculation unit that adjusts the edited envelope information based on the design target values, wherein the design target value estimating unit performs an acquisition step of acquiring required data for calculating a target design primary energy consumption of the building from the data providing unit; a first calculation step of calculating the target design primary energy consumption of the building based on the required data; and a design primary energy calculation step of calculating each of the design primary energy consumptions of a plurality of existing buildings. The design support system is configured to execute a second calculation step of deriving the relationship between design primary energy consumption and air conditioning capacity using a property database containing at least data on energy consumption and air conditioning capacity, and calculating a target air conditioning capacity corresponding to the target design primary energy consumption as a design target value based on this relationship; the envelope calculation unit is configured to execute a third calculation step of acquiring envelope information of the building from the design editing unit and calculating the thermal load of the building and the design air conditioning capacity, which is the air conditioning capacity corresponding to the thermal load, from this envelope information; and the design support system is further characterized by having a display unit that displays the design air conditioning capacity and the target air conditioning capacity.

[0009] According to the present invention configured as described above, the design support system can use the property database to estimate a target air conditioning capacity as a design target value for achieving the target design primary energy consumption of the design building from the early stages of the design of the building. Furthermore, the design support system can appropriately estimate the design air conditioning capacity of the design building at the current stage from the envelope information and display the design target value and the current design air conditioning capacity. Therefore, the present invention allows the envelope design to be performed while predicting whether the current envelope design achieves the design target value, and ultimately whether the target design primary energy consumption is achieved. In this way, the present invention allows the design of the design building to be performed while predicting whether the target design primary energy consumption is achieved from the early design stage. Therefore, the present invention makes it possible to avoid making major design changes in the final stages of the design in order to achieve the desired energy performance.

[0010] In the present invention, preferably, the required data is data relating to the building's energy reduction target value, design information necessary for calculating the building's standard primary energy consumption, and equipment information of the building, and the first calculation step is a step of calculating the building's target design primary energy consumption from the building's standard primary energy consumption calculated from the equipment information and the energy reduction target value. According to the present invention configured in this way, the design support system can calculate the building's standard primary energy consumption and the target design primary energy consumption taking into account the energy reduction target value of the designed building in the first calculation step, based on the basic design information and basic equipment information of the designed building.

[0011] In the present invention, the exterior skin calculation unit is preferably configured to compare the design air conditioning capacity with the target air conditioning capacity, and if the design air conditioning capacity is greater than the target air conditioning capacity or if an adjustment instruction command is received, to execute an exterior skin adjustment step of adjusting the exterior skin information so that the design air conditioning capacity is equal to or less than the target air conditioning capacity. According to the present invention configured in this manner, the exterior skin information can be automatically adjusted in accordance with the comparison result between the design air conditioning capacity and the target air conditioning capacity.

[0012] In the present invention, the exterior skin information adjusted by the exterior skin calculation unit preferably includes at least the window area, window specifications, or insulation thickness. According to the present invention configured in this manner, at least the window area, window specifications, insulation specifications, or solar shading specifications can be adjusted to improve exterior skin performance.

[0013] In the present invention, preferably, the required data includes air conditioning specification information for the building, and the second calculation step is configured to select multiple existing buildings that match the building from the property database using the air conditioning specification information for the building when calculating the target air conditioning capacity, and the envelope calculation unit compares the design air conditioning capacity with the target air conditioning capacity, and if the design air conditioning capacity is greater than the target air conditioning capacity, executes a process to suggest to the user changing the air conditioning specifications for the building to more efficient air conditioning specifications based on the air conditioning specification information for the building. According to the present invention configured in this way, if the design air conditioning capacity is greater than the target air conditioning capacity in the current air conditioning specifications (equipment) of the designed building, the user is prompted to change to more efficient air conditioning specifications (equipment), so the user can consider changing the equipment, preferably at an early stage of the design process.

[0014] In the present invention, preferably, the property database further includes data on air conditioning design primary energy consumption, design information, and equipment information for a plurality of existing buildings, and the design target value estimation unit is configured to execute, in the second calculation step, a front-end step of deriving a first relationship between the design primary energy consumption and the air conditioning design primary energy consumption for the plurality of existing buildings and estimating an air conditioning target primary energy consumption corresponding to the target design primary energy consumption based on this first relationship, and a back-end step of deriving a second relationship between the air conditioning design primary energy consumption and the air conditioning capacity for the plurality of existing buildings and estimating a target air conditioning capacity corresponding to the air conditioning target primary energy consumption based on this second relationship. According to the present invention configured in this manner, the property database for past properties is used to statistically estimate the relationship between the design primary energy consumption, the air conditioning design primary energy consumption, and the air conditioning capacity, and it is possible to estimate the target air conditioning capacity from the target design primary energy consumption of the designed building.

[0015] In the present invention, preferably, in the second calculation step, the design target value estimation unit extracts and uses data on multiple existing buildings from the property database that match at least data related to the predetermined design information or predetermined equipment information of the building. According to the present invention configured in this way, by extracting from the property database past properties that match the predetermined design information or equipment information of the designed building and using them for relationship estimation, more accurate estimation is possible. Specifically, the predetermined design information can be building use and / or area classification, and the predetermined equipment information can be air conditioning method and / or air conditioning efficiency.

[0016] In the present invention, the design target value estimation unit is preferably configured to receive a predetermined initial air conditioning capacity from the design editing unit and execute a back-calculation step of calculating an initial design primary energy consumption corresponding to the initial air conditioning capacity using the above relationship. According to the present invention configured in this way, when a desired air conditioning capacity is known, it is possible to perform design taking into account the design primary energy consumption estimated for this desired value and the target design primary energy consumption. [Effects of the Invention]

[0017] The design support system of the present invention can improve design efficiency by supporting the envelope design and selection of equipment required to achieve the target energy performance of a building. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a block diagram showing a configuration of a design support system according to an embodiment of the present invention. [Figure 2A] FIG. 2 is an explanatory diagram of basic design information according to an embodiment of the present invention. [Figure 2B] FIG. 2 is an explanatory diagram of basic design information according to an embodiment of the present invention. [Figure 3] FIG. 2 is an explanatory diagram of basic facility information according to an embodiment of the present invention. [Figure 4] FIG. 10 is an explanatory diagram of design data including skin information according to an embodiment of the present invention. [Figure 5] FIG. 2 is an explanatory diagram of a property database according to an embodiment of the present invention. [Figure 6A] FIG. 10 is an explanatory diagram illustrating estimation of a design target value using a property database according to an embodiment of the present invention. [Figure 6B] 10 is a graph showing the relationship between the design primary energy consumption and the air conditioning design primary energy consumption of past properties extracted from the property database according to an embodiment of the present invention. [Figure 7A] FIG. 10 is an explanatory diagram of a filtering process based on facility information according to an embodiment of the present invention. [Figure 7B] FIG. 10 is an explanatory diagram of another filtering process using facility information according to an embodiment of the present invention. [Figure 8] FIG. 10 is an explanatory diagram of a correction process using another piece of equipment information according to an embodiment of the present invention. [Figure 9] FIG. 10 is an explanatory diagram illustrating the results of a back-calculation function according to an embodiment of the present invention. [Figure 10] 1 is a flowchart of a design support process according to an embodiment of the present invention. [Figure 11] FIG. 10 is a block diagram showing the configuration of a design support system according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, a design support system according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of a design support system according to an embodiment of the present invention. 1, a design support system 1 according to an embodiment of the present invention can be realized as a computer device that a user uses when designing a building. Specifically, in this embodiment, a design support program according to an embodiment of the present invention is installed in the computer device, causing the computer device to function as the design support system 1. The computer device is composed of, for example, a microprocessor, memory, an interface circuit, a display, and software for operating these components.

[0020] The design support system 1 comprises a control unit (microprocessor) 10 that executes various calculation processes, a storage unit (memory) 30 that stores design support programs and various databases, a data input / output unit (interface circuit) 32 that inputs / outputs and communicates data with the outside, a display unit 34, and an input unit (mouse, keyboard, etc.) 36. The design support system 1 is also connected to an external data input device 5 via a communication line 3, and can receive data transmitted by the external data input device 5 from the data input / output unit 32. The external data input device 5 is, for example, a computer terminal device.

[0021] The control unit 10 controls the overall system operation, but in addition to this, it is configured to function as a design target value estimation unit 11 for estimating predetermined design target values ​​of the building, a design editing unit 13 for enabling the user to edit design information including the building's envelope information, and an envelope calculation unit 15 for automatically adjusting the envelope information based on the design target values. The control unit 10 can function as the design target value estimation unit 11, design editing unit 13, and envelope calculation unit 15 using the installed design support program.

[0022] In Japan, buildings are required to comply with energy consumption performance standards (energy conservation standards) under the Act on Improvement of Energy Consumption Performance of Buildings (also known as the Building Energy Conservation Act). These laws stipulate the BEI as a standard indicator for determining compliance with energy conservation standards. The BEI is based on an energy consumption performance calculation program and is the ratio of the primary energy consumption of a designed building to the primary energy consumption of a standard building. In other words, the BEI is the value obtained by dividing the designed primary energy consumption of a designed building by the standard primary energy consumption determined by the area classification, building use, room usage conditions, etc.

[0023] Primary energy consumption is the total of the energy consumption of air conditioning, ventilation, lighting, hot water supply, elevators, office and information equipment, etc. The Building Energy Conservation Act prescribes area classifications (1 to 8) and building uses (offices, etc., hotels, etc., hospitals, etc., department stores, etc., schools, restaurants, etc., assembly halls, etc., factories, etc.). The design support system 1 stores this prescribed data as data necessary to calculate the standard primary energy consumption and design primary energy consumption, or makes this prescribed data available via communication line 3.

[0024] When designing a new building (also referred to as a "designed building"), the design target value estimation unit 11 estimates a design target value (target air conditioning capacity) related to the design primary energy consumption of the designed building based on simple input data from the user. As will be described later, this design target value (target air conditioning capacity) can preferably be made to match the basic equipment information (e.g., air conditioning method, air conditioning efficiency, etc.) of the designed building. Therefore, the design target value estimation unit 11 acquires basic data related to the design information and equipment information of the designed building (basic design information, basic equipment information), and the energy reduction target value Tr from the input unit 36 ​​or the external data input device 5.

[0025] 2A and 2B are explanatory diagrams of the basic design information, and Fig. 3 is an explanatory diagram of the basic equipment information. The basic design information includes data necessary for calculating the standard primary energy consumption Es of the designed building, such as the property name, building use, energy conservation standard area classification, and total floor area shown in Fig. 2A, and the room use and area of ​​each property shown in Fig. 2B.

[0026] In this embodiment, the energy reduction target value Tr is included in the basic design information. However, the design target value estimation unit 11 may acquire the energy reduction target value Tr as information separate from the basic design information. This energy reduction target value Tr is, for example, the BEI. When high energy-saving efficiency is required, the user sets the BEI to a value smaller than the reference value (BEI=1.0) (for example, BEI=0.48).

[0027] The basic equipment information also includes information about the air conditioning of the designed building, such as the air conditioning method (central heat source method, individual distribution method; multi-air conditioner (e.g., "Building Multi"), pair air conditioner, etc.) and air conditioning efficiency (also called "COP") shown in Figure 3. Here, COP (Coefficient of Performance; average energy consumption efficiency of heating and cooling) is the cooling and heating capacity (kW) per kW of power consumption under specified temperature conditions, and the higher the value, the higher the air conditioning efficiency. Furthermore, the basic equipment information includes, as air conditioning specification information, various data related to at least one of the air conditioning specifications, such as the number of air conditioners, air conditioning control method, pump water temperature, pump control method, and pump power consumption, in addition to the air conditioning method and air conditioning efficiency.

[0028] In addition, the design target value estimation unit 11 calculates the standard primary energy consumption Es of the designed building from the acquired basic design information based on the Building Energy Conservation Act (Act on Improving the Energy Consumption Performance of Buildings), and calculates the target design primary energy consumption Et of the designed building from this standard primary energy consumption Es and the energy reduction target value Tr using the following formula (first calculation step). Et = Es × Tr

[0029] Generally, data such as coefficients related to each primary energy consumption amount required to calculate the standard primary energy consumption amount Es is specified by the Building Energy Conservation Act, and this basic data is stored in the memory unit 30 or is available via the communication line 3. In addition, basic data for calculating the thermal load of the building and the air conditioning capacity corresponding to this thermal load is also stored in the memory unit 30 or is available via the communication line 3.

[0030] Furthermore, the design target value estimation unit 11 uses the property database DB described below to calculate the target air conditioning capacity Qt corresponding to the target design primary energy consumption Et as the design target value based on the relationship (actual value) between the design primary energy consumption and the air conditioning capacity in multiple existing buildings (past properties) (second calculation process).

[0031] The design editing unit 13 functions as, for example, 2D or 3D CAD, BIM for architectural design, etc. A user can input and edit design data for a design building using the input unit 36 ​​and display the design data on the display unit 34. The design data is stored in the memory unit 30. FIG. 4 shows a portion of the design data, which also includes envelope information necessary for calculating the heat load of the design building. Furthermore, the design editing unit 13 can display design drawing data and the calculated values ​​as described above (standard primary energy consumption Es, energy reduction target value Tr, target design primary energy consumption Et, target air conditioning capacity Qt, design air conditioning capacity Qd, etc.) on the display unit 34.

[0032] Furthermore, the envelope calculation unit 15 acquires design data including envelope information of the design building edited by the design editing unit 13, and calculates the thermal load of the design building and the design air conditioning capacity Qd, which is the air conditioning capacity corresponding to this thermal load, from this data (third calculation step). The design data input and edited by the design editing unit 13 includes data necessary to calculate the thermal load and air conditioning capacity of the design building.

[0033] Furthermore, the exterior skin calculation unit 15 compares the design air conditioning capacity Qd with the target air conditioning capacity Qt, and if the design air conditioning capacity Qd is greater than the target air conditioning capacity Qt (Qd>Qt), it executes an exterior skin adjustment process in which the exterior skin information is automatically adjusted to improve exterior skin performance so that the design air conditioning capacity Qd is equal to or less than the target air conditioning capacity Qt. This automatic adjustment involves optimizing and changing the design values ​​of one or more parameters related to the exterior skin (e.g., window area, window specifications, insulation specifications (thickness, type, etc.), solar shading specifications (sun shading dimensions, etc.)). The automatically adjusted parameters are parameters specified by the user or preset parameters.

[0034] In addition, in this embodiment, if the exterior skin adjustment process by the exterior skin calculation unit 15 is unable to reduce the design air conditioning capacity Qd so that the design air conditioning capacity Qd is equal to or less than the target air conditioning capacity Qt, a process of changing the basic equipment information is performed to increase the target air conditioning capacity Qt.

[0035] Next, the property database DB in this embodiment will be described with reference to Fig. 5. Fig. 5 shows a portion of the property database DB. The property database DB is data on past design examples (buildings) and has performance data for various items for each of multiple past properties. The property database DB includes at least design information and equipment information that links the relationship between the design energy consumption and air conditioning capacity of past properties.

[0036] The property database DB contains all the design information necessary to calculate the BEI, including data on the BEI (BEI for the entire building, BEI / AC (air conditioning), BEI / V (ventilation), BEI / L (lighting), BEI / HW (hot water supply), BEI / EV (elevator)), building use (office, hotel, hospital, school, etc.), room use within the building (office, conference room, hallway, etc.), building and room area, energy conservation standard area classification (areas 1 to 8), envelope information (insulation materials, window specifications, etc.), structural type, annual solar radiation area classification, etc.

[0037] The equipment information contained in the property database DB includes all the air conditioning specification information necessary to calculate the BEI. The air conditioning specification information includes various data on air conditioning specifications, such as at least one of the air conditioning method, air conditioning efficiency, number of air conditioners, air conditioning control method, pump water temperature, pump control method, and pump power consumption.

[0038] Next, the process of estimating design target values ​​by the design target value estimation unit 11 will be described with reference to Figures 6A, 6B, 7A, 7B, and 8. First, a process is executed to select from the property database DB a plurality of past properties that match the predetermined design information of the newly designed building (in this example, building use, energy conservation standard zoning) (see Figure 6A). In the example of Figure 6A, a plurality of past properties with "building use" set to "office" and "energy conservation standard zoning" set to "7" are selected. This selection process is not essential, but in this example, past properties similar to the designed building are selected to improve the estimation accuracy of the design target values.

[0039] FIG. 6B shows data points for a selected past property (see FIG. 6A) plotted on a graph of the design primary energy consumption (horizontal axis) and the air-conditioning design primary energy consumption (vertical axis) for the entire building. Then, a process is executed to calculate a relational equation that expresses the relationship between the design primary energy consumption and the air-conditioning design primary energy consumption from these multiple data points. The relational equation is a predetermined mathematical expression calculated using, for example, the least squares method. The relational equation can be a linear equation, a quadratic or higher order equation, an exponential function, or the like.

[0040] In the example of FIG. 6B, the relational expression is expressed by the following linear equation (see the line L in FIG. 6B).

[0041] Eac=a1×Eall+b1...(Formula 1) Eac: Design primary energy consumption of air conditioning Eall: Design primary energy consumption of the entire building a1 (coefficient): slope b1 (coefficient): intercept By using this relational expression 1, the target primary energy consumption Etac of air conditioning is estimated as follows for the target design primary energy consumption Et of the designed building (preceding the second calculation step): Etac=a1×Et+b1

[0042] When estimating the target primary energy consumption amount Etac for air conditioning, the properties may be narrowed down in advance to those whose "air conditioning method" is "multi-air conditioner" or "central heat source," as described below.

[0043] Next, a process is performed in which the selected past properties are further narrowed down by filtering to past properties that match the specified equipment information (e.g., air conditioning system) of the designed building. Figure 7A shows the selected past properties narrowed down to properties where the "air conditioning system" is "multi-air conditioner," and each data point of the narrowed down past properties is plotted on a graph of air conditioning design primary energy consumption (horizontal axis) and air conditioning capacity (vertical axis). Similarly, Figure 7B shows an example where the "air conditioning system" is narrowed down to "central heat source." In each example, a process is performed to calculate a relational equation that represents the relationship between the air conditioning design primary energy consumption and air conditioning capacity. Figures 7A and 7B show a straight line M1 or a curve M2 that represents the calculated relational equation.

[0044] In FIG. 7A, the relationship between multiple data points is approximated by a linear equation. Q=a2×Eac+b2...(Formula 2)

[0045] In Figure 7B, the relationship between multiple data points is approximated by an exponential function. Q=a3×E Eac +b3 (Equation 3) Q:Air conditioning capacity Eac: Design primary energy consumption of air conditioning a2, a3 (coefficients): slope b2, b3 (coefficients): intercept E: Napier's number The type of approximation formula to be used can be set in advance as appropriate according to the facility information to be narrowed down.

[0046] When "multi-air conditioner" is selected as the "air conditioning method" as shown in Figure 7A, the target air conditioning capacity Qt for the target primary energy consumption Etac of the air conditioning is estimated as follows by using relational expression 2 (process subsequent to the second calculation process): Qt=a2×Etac+b2

[0047] Furthermore, when "central heat source" is selected as the "air conditioning method," the target air conditioning capacity Qt for the target primary energy consumption Etac of air conditioning is estimated as follows using relational expression 3: Qt=a3×E Etac +b3

[0048] Furthermore, the relational equations described with reference to Figures 7A and 7B can be corrected using other equipment information (air conditioning efficiency and pump power consumption) to further match the equipment specifications of the designed building. This correction can be performed, for example, when changing the originally planned air conditioning equipment in the equipment information of the designed building to a more efficient air conditioning equipment. Figure 8 shows an example in which the relational equation calculated by filtering the air conditioning method by "multi-air conditioner" as in Figure 7A is corrected using air conditioning efficiency.

[0049] Specifically, the multiple properties narrowed down by "multi-air conditioner" (see Figure 7A) include properties with a variety of air conditioning efficiencies. In the correction process, the average value of the air conditioning efficiencies of the multiple properties narrowed down by the filter process is calculated, and the value α obtained by dividing the (updated) air conditioning efficiency of the designed building (design air conditioning efficiency; for example, 3.6) by the calculated average value is used as the correction coefficient. The corrected relational equation 4 can be calculated by multiplying this correction coefficient α by relational equation 2. In Figure 8, relational equation 2 before correction is represented by line L1, and relational equation 4 after correction is represented by line L2.

[0050] Specifically, relational expression 4 is as follows:

[0051] Qa = Q × α = (a2 × Eac + b2) × α (Equation 4) Qa: Corrected air conditioning capacity α: correction coefficient Therefore, when "multi-air conditioner" is selected as the "air conditioning method" and correction is made based on the air conditioning efficiency, using relational expression 4, the corrected target air conditioning capacity Qta for the air conditioning target primary energy consumption Etac can be estimated as follows:

[0052] Qta=(a2×Eac+b2)×α...(Formula 5) In the example of Figure 8, the air conditioning efficiency of the designed building (e.g., 3.6) is higher than the average air conditioning efficiency of the selected past properties (e.g., 3.0), so the correction coefficient α (= 3.6 / 3.0 = 1.2) is greater than 1 (α > 1), and the slope of line L2 (a2 × α) is greater than the slope of line L1 (a2).

[0053] By using relational expression 5, an updated target air conditioning capacity Qta (corrected value) for the design building is estimated. If a higher air conditioning efficiency (or lower pump power consumption) is adopted in the design building, α>1, so the estimated corrected target air conditioning capacity Qta for the design building will be larger than the target air conditioning capacity Qt before correction. Therefore, even if the envelope performance is relatively low, it becomes easier to achieve the target air conditioning capacity Qta (or the target primary energy consumption Etac for air conditioning). In other words, for example, by changing the design, a more efficient air conditioning equipment can be adopted, allowing for relatively low envelope performance.

[0054] In this embodiment, the property database DB is used to first determine the relationship between the design primary energy consumption and the design primary energy consumption of the air conditioning, and then determine the relationship between the design primary energy consumption of the air conditioning and the air conditioning capacity. However, this is not limited to this, and the relationship between the design primary energy consumption and the air conditioning capacity may also be determined directly.

[0055] Next, the additional back-calculation function of the design target value estimation unit 11 will be described. This back-calculation function is a function that calculates the primary energy consumption of air conditioning (and the primary energy consumption of the entire building) by back-calculating from the desired air-conditioning capacity during the design stage of the designed building. Relational formula 4 (or relational formula 2 or 3) is configured to calculate the corrected air-conditioning capacity Qa (or the uncorrected air-conditioning capacity Q) from the designed primary energy consumption Eac of the air-conditioning. On the other hand, this relational formula 4 (or relational formula 2 or 3) can be used to modify the formula so that the designed primary energy consumption Eac of the air-conditioning is calculated from the corrected air-conditioning capacity Qa (or the uncorrected air-conditioning capacity Q).

[0056] Relational formula 4 can be transformed as follows to derive the following inverse calculation formula for calculating the design primary energy consumption amount Eac of the air conditioning from the corrected air conditioning capacity Qa.

[0057] Eac=(Qa-α×b2) / (α×a2) (Formula 4-1) Similarly, from Relational Expressions 2 and 3, the following equations can be derived to calculate the design primary energy consumption amount Eac of the air conditioning from the air conditioning capacity Q.

[0058] Eac=(Q-b2) / a2 (Formula 2-1) Eac=ln[(Q-b3) / a3] (Formula 3-1) Furthermore, Relational Formula 1 can also be modified as follows to calculate the design primary energy consumption of the entire building from the design primary energy consumption of the air conditioning:

[0059] Eall=(Eac-b1) / a1...(Formula 1-1) When a user has a desired initial air conditioning capacity Qr in the original design of a building to be designed, the user can use a back-calculation formula to estimate the initial design primary energy consumption Eacr of the air conditioning from this air conditioning capacity Qr. The design target value estimation unit 11 uses the back-calculation function to predict the initial design primary energy consumption Eacr of the air conditioning corresponding to the air conditioning capacity Qr by using relational expression 4-1 (relational expression 2-1 or 3-1) (i.e., by substituting "Qr" for "Qa" or "Q" in the formula).

[0060] Furthermore, the design target value estimation unit 11 can use the reverse calculation function to predict the initial design primary energy consumption Eallr of the entire building corresponding to the estimated initial design primary energy consumption Eacr of the air conditioning by using the relational expression 1-1 (i.e., by substituting "Eacr" for "Eac" in the expression).The design target value estimation unit 11 can then display this prediction result on the display unit 34 (see FIG. 9).

[0061] In the example of FIG. 9, the standard primary energy consumption (BEI = 1) of the designed building, the initial design primary energy consumption Eallr when the desired initial air conditioning capacity Qr of the original design is used (in this example, the BEI is calculated as 0.51 as a "comparison value"), and the target design primary energy consumption Et when the target primary energy consumption Etac of the air conditioning is used (in this example, the BEI is 0.48) are shown as stacked bar graphs of each energy consumption. Note that energy other than air conditioning energy does not need to be calculated, but can be calculated as appropriate. For example, for each energy source, such as ventilation, lighting, hot water supply, and elevators, the BEI for other sources can be automatically calculated according to the air conditioning BEI (the target primary energy consumption for air conditioning relative to the standard primary energy consumption for air conditioning), and the energy amounts for each source can be automatically calculated based on these BEIs. Alternatively, the values ​​of the original design entered by the user can be used.

[0062] In other words, when an initial air conditioning capacity Qr is set at the original design stage, the user can use the back-calculation function to check the estimated initial design primary energy consumption Eacr and initial design primary energy consumption Eallr of the air conditioning in the original design that correspond to this value, and in particular, when comparing the target primary energy consumption Etac of the air conditioning with the initial design primary energy consumption Eacr of the air conditioning, the user can consider in advance whether or not to consider reducing the initial design primary energy consumption Eacr of the air conditioning.

[0063] Next, the flow of the design support process in this embodiment will be described with reference to Fig. 10. When the design support process is started in the design support system 1, the control unit 10 (design target value estimation unit 11) acquires data related to the designed building from the data providing unit (i.e., the input unit 36 ​​or the external data input device 5) via the data input / output unit 32 (S10). This data includes the basic design information, the energy reduction target value, and the basic equipment information, as described above.

[0064] Next, the control unit 10 (design target value estimation unit 11) estimates the target primary energy consumption Etac for air conditioning of the designed building based on the acquired data and the property database DB, etc. (S11). In this step S11, the control unit 10 first calculates the standard primary energy consumption Es of the designed building, and calculates the target design primary energy consumption Et of the designed building using the energy reduction target value Tr (first calculation step). Next, in subsequent step S11, the control unit 10 estimates the target primary energy consumption Etac for air conditioning from the target design primary energy consumption Et of the designed building using the property database DB (see FIG. 6B; previous step of the second calculation step).

[0065] Furthermore, in step S12, the control unit 10 (design target value estimation unit 11) uses the property database DB to estimate the target air conditioning capacity Qt (or the corrected target air conditioning capacity Qta) from the target primary energy consumption Etac of the air conditioning (see Figures 7A, 7B, and 8; a process subsequent to the second calculation process).

[0066] Next, the control unit 10 (design editing unit 13) displays at least the estimated target air conditioning capacity Qt (or the corrected target air conditioning capacity Qta) on the display unit 34 (S13). Based on this target air conditioning capacity, the user can use the input unit 36, etc. to design and edit the building on the CAD screen.

[0067] Next, the control unit 10 (design editing unit 13) acquires design data of at least the exterior skin information edited by the user for the designed building (S14). This exterior skin information design data includes data necessary for calculating the design air-conditioning capacity Qd (data on the exterior skin, window specifications, solar radiation shielding, etc.).

[0068] Once the user has finished editing the design of the building, the control unit 10 (envelope calculation unit 15) uses the envelope information of the building to calculate the design air conditioning capacity Qd of the building based on a predetermined heat load calculation procedure for the building (S15). The control unit 10 (design editing unit 13) displays at least the calculated design air conditioning capacity Qd on the display unit 34 (S16). At this time, the control unit 10 (design editing unit 13) may display the design air conditioning capacity Qd together with the target air conditioning capacity Qt (or corrected target air conditioning capacity Qta) on the display unit 34.

[0069] Next, the control unit 10 (envelope calculation unit 15) determines whether the design air conditioning capacity Qd is equal to or less than the target air conditioning capacity Qt (S17), and if the determination is affirmative (YES; Qd≦Qt), the process ends. On the other hand, if the determination is negative (NO; Qd>Qt), the control unit 10 (envelope calculation unit 15) automatically optimizes and adjusts the envelope information of the designed building so that the design air conditioning capacity Qd is equal to or less than the target air conditioning capacity Qt (S18; envelope adjustment process). The control unit 10 displays the adjustment results (adjusted design air conditioning capacity Qd, target air conditioning capacity Qt, etc.) on the display unit 34 (S19).

[0070] The control unit 10 (external skin calculation unit 15) may automatically start step S18 after a negative determination in step S17, or may start step S18 upon receipt of an adjustment instruction command from the user. In this case, the control unit 10 displays a negative determination in step S17 on the display unit 34, and in response, the user can input an adjustment instruction command via the input unit 36 ​​or the like.

[0071] In addition, the user can specify one or more exterior design items that should be adjusted as a priority in the adjustment instruction command (e.g., window area, window specifications, insulation specifications, solar shading specifications, etc.). The user can also specify adjustable numerical ranges, selection ranges, etc. for the adjustment items. The control unit 10 (exterior calculation unit 15) can adjust the exterior information so as to improve the exterior performance within the specified items and ranges. If the control unit 10 does not receive an adjustment instruction command from the user, it adjusts the exterior information based on preset adjustment items, adjustable numerical ranges, selection ranges, etc.

[0072] The control unit 10 (outer skin calculation unit 15) determines whether the design air conditioning capacity Qd is equal to or less than the target air conditioning capacity Qt as a result of the optimization adjustment (S20), and if the determination is affirmative (YES), ends the processing. On the other hand, if the determination is negative (NO), proceeds to step S21. However, the control unit 10 may be configured to repeatedly execute steps S18 and S19. In this case, the control unit 10 can receive additional instructions from the user or automatically select to change the adjustment items, the numerical ranges, the selection ranges, etc., and re-execute steps S18 and S19.

[0073] If the determination in step S20 is negative, the user can understand from the displayed adjustment results that the design air conditioning capacity Qd cannot be adjusted to be equal to or less than the target air conditioning capacity Qt simply by improving the exterior performance. In this case, the user inputs a command to end the adjustment of the exterior information. This causes the control unit 10 (exterior calculation unit 15) to execute a process to change the equipment information (S21).

[0074] In step S21, the control unit 10 can suggest to the user changes to more energy-efficient equipment. For example, the control unit 10 can suggest to the user via the display unit 34 changes to equipment or air conditioning specifications with higher efficiency than the equipment or air conditioning specifications identified based on the current basic equipment information (air conditioning specification information). Specifically, this is a change to a higher air conditioning efficiency and / or air conditioning method, or a change to a lower pump power consumption. This may be a presentation of the product, or may be a presentation of only the numerical range after the change in air conditioning efficiency. Based on this, the user can select more energy-efficient equipment using the input unit 36 ​​or the like and input the changed equipment information. For example, the change in equipment information is a change to air conditioning specification information (air conditioning efficiency, air conditioning method, number of air conditioners, air conditioning control method, pump water temperature, pump control method, pump power consumption, etc.).

[0075] When the equipment information is newly changed in step S21, the control unit 10 (design target value estimating unit 11) executes the processing of step S12 again. The change in the equipment information is, for example, the air conditioning efficiency, as described above. In this case, for example, when the air conditioning efficiency of the designed building is changed from 3.0 (before the change) to 3.6 (after the change), the relational expression is changed as described with reference to FIG. 8 (in FIG. 8, the line L1 is changed to the line L2). As a result, the target air conditioning capacity Qt estimated in step S12 is changed to a larger target air conditioning capacity Qta, and the processing from step S13 onwards is executed. As a result, in this embodiment, a positive determination is finally made in step S17 or S20, and the processing can be terminated.

[0076] The above embodiment may be modified as follows.

[0077] In the above embodiment, the design support system 1 is configured by a computer device as shown in FIG. 1. However, as shown in FIG. 11, the design support system 1 may be configured by a combination of a computer device (device 100) and an external computer device 200 connected to the device 100 via a communication line 3 or the like. In this case, the control unit 10A of the device 100 used by the user functions as a design editing unit 13. On the other hand, the external computer device 200 is configured by a computer device similar to the device 100, but the control unit 10B functions as a design target value estimating unit 11 and an outer skin calculation unit 15. In this configuration, a large number of devices 100 can be connected to the external computer device 200, and the user can use the external computer device 200 as a calculation resource.

[0078] Alternatively, the design support system 1 may be configured by installing all the functions of the design support program in an external computer device such as a server on a computer network (communication line 3). In this case, the external computer device has all the functions of the design support system, and a user can use a terminal device (computer device) to access the external computer device via the communication line 3 and operate the design support system.

[0079] In the above embodiment, if the determination in step S17 is negative, the outer skin adjustment step in step S18 is executed, but step S21 may be executed without executing steps S18 to S20. In this case, as described above, the process for setting a change to a more efficient facility device is executed, followed by the process in step S12 and subsequent steps.

[0080] The operation of the design support system 1 according to the embodiment of the present invention will be described below.

[0081] The design support system 1 for building envelope design of this embodiment includes a data providing unit (input unit 36, external data input device 5) that provides data related to the building, a design target value estimating unit 11 for estimating design target values ​​of the building, a design editing unit 13 that allows a user to edit the building envelope information, and an envelope calculation unit 15 that adjusts the edited envelope information based on the design target values. The design target value estimating unit 11 performs an acquisition step (S10) of acquiring required data for calculating the target design primary energy consumption Et of the building from the data providing unit, a first calculation step of calculating the target design primary energy consumption Et of the building based on the required data, and a second calculation step of calculating the target design primary energy consumption Et of the building based on the required data. The design support system 1 is configured to execute a second calculation step (S12) of deriving the relationship between the design primary energy consumption and the air conditioning capacity using a property database DB containing at least data related to the design primary energy consumption Et, and calculating the target air conditioning capacity Qt or Qta corresponding to the target design primary energy consumption Et as a design target value based on this relationship; the envelope calculation unit 15 is configured to acquire the envelope information of the building from the design editing unit 13 (S14), and execute a third calculation step (S15) of calculating the thermal load of the building and the design air conditioning capacity Qd, which is the air conditioning capacity corresponding to the thermal load, from this envelope information; and the design support system 1 is further characterized by having a display unit 34 that displays the design air conditioning capacity Qd and the target air conditioning capacity Qt or Qta.

[0082] In this embodiment, the design support system 1 can use the property database DB to estimate the target air conditioning capacity Qt or Qta as a design target value for achieving the target design primary energy consumption Et of the design building from the early stages of the design of the building. Furthermore, the design support system 1 can appropriately estimate the design air conditioning capacity Qd of the design building at the current stage from the exterior skin information and display the design target value (target air conditioning capacity Qt or Qta) and the current design air conditioning capacity Qd. Therefore, in this embodiment, the exterior skin design can be performed while predicting whether the current exterior skin design (design air conditioning capacity Qd) achieves the design target value (target air conditioning capacity Qt or Qta), and ultimately whether the target design primary energy consumption Et is achieved. In this way, in this embodiment, the design of the design building can be performed while predicting whether the target design primary energy consumption Et is achieved from the initial design stage. Therefore, in this embodiment, it is possible to avoid major design changes in the final design stage in order to achieve the desired energy performance.

[0083] Furthermore, in this embodiment, the required data is preferably data relating to the building's energy reduction target value (BEI), design information necessary for calculating the building's standard primary energy consumption Es, and equipment information for the building, and the first calculation step is a step of calculating the building's target design primary energy consumption Et from the building's standard primary energy consumption Es calculated from the equipment information and the energy reduction target value (BEI). In this embodiment configured as described above, in the first calculation step, the design support system 1 can calculate the building's standard primary energy consumption Es and the target design primary energy consumption Et taking into account the energy reduction target value (BEI) for the designed building based on the basic design information and basic equipment information for the designed building.

[0084] In addition, in this embodiment, preferably, the exterior skin calculation unit 15 is configured to compare the design conditioning capacity Qd with the target conditioning capacity Qt or Qta (S17), and if the design conditioning capacity Qd is greater than the target conditioning capacity Qt or Qta, or if an adjustment instruction command is received, to execute an exterior skin adjustment step (S18) of adjusting the exterior skin information so that the design conditioning capacity Qd is equal to or less than the target conditioning capacity Qt or Qta. In this embodiment configured in this manner, the exterior skin information can be automatically adjusted according to the comparison result between the design conditioning capacity Qd and the target conditioning capacity Qt or Qta.

[0085] In this embodiment, preferably, the exterior skin information adjusted by the exterior skin calculation unit 15 includes at least the window area, window specifications, heat insulation specifications, or sun shading specifications. In this embodiment configured as above, at least the window area, window specifications, heat insulation specifications, or sun shading specifications can be adjusted to improve the exterior skin performance.

[0086] In this embodiment, the required data preferably includes the building's air conditioning specification information, and the second calculation step (S12) is configured to select multiple existing buildings that match the building from the property database DB using the building's air conditioning specification information when calculating the target air conditioning capacity Qt or Qta. The envelope calculation unit 15 compares the design air conditioning capacity Qd with the target air conditioning capacity Qt or Qta, and if the design air conditioning capacity Qd is greater than the target air conditioning capacity Qt or Qta (S17, S20), executes a process (S21) to suggest to the user changing the building's air conditioning specifications to more efficient air conditioning specifications based on the building's air conditioning specification information. In this embodiment configured as above, if the design air conditioning capacity Qd is greater than the target air conditioning capacity Qt or Qta in the current air conditioning specifications (equipment) of the designed building, the user is prompted to change to more efficient air conditioning specifications (equipment), allowing the user to consider changing the equipment, preferably at an early stage of the design process.

[0087] In this embodiment, the property database DB preferably further includes data on air conditioning design primary energy consumption, design information, and equipment information for a plurality of existing buildings, and the design target value estimation unit 11 is configured to execute the following steps in the second calculation step: a first step of deriving a first relationship between the design primary energy consumption and the air conditioning design primary energy consumption for the plurality of existing buildings and estimating an air conditioning target primary energy consumption Etac corresponding to the target design primary energy consumption Et based on this first relationship; and a second step of deriving a second relationship between the air conditioning design primary energy consumption and the air conditioning capacity for the plurality of existing buildings and estimating a target air conditioning capacity Qt or Qta corresponding to the air conditioning target primary energy consumption based on this second relationship. In this embodiment configured as described above, the property database DB for past properties is used to statistically estimate the relationship between the design primary energy consumption, the air conditioning design primary energy consumption, and the air conditioning capacity, and the target air conditioning capacity Qt or Qta can be estimated from the target design primary energy consumption Et of the designed building.

[0088] In addition, in this embodiment, preferably, in the second calculation step, the design target value estimation unit 11 extracts and uses data on multiple existing buildings that match at least data related to the predetermined design information or predetermined equipment information of the building from the property database DB. In this embodiment configured as above, by extracting past properties that match the predetermined design information or equipment information of the designed building from the property database DB and using them for relationship estimation, more accurate estimation is possible. Specifically, the predetermined design information can be the building use and / or area classification, and the predetermined equipment information can be the air conditioning method and / or air conditioning efficiency.

[0089] Furthermore, in this embodiment, the design target value estimation unit 11 is preferably configured to receive a predetermined initial air conditioning capacity Qr from the design editing unit 13, and to execute a back-calculation process to calculate an initial design primary energy consumption corresponding to the initial air conditioning capacity Qr using the above relationship. In this embodiment configured in this manner, when a desired air conditioning capacity is available, it is possible to perform design taking into consideration the design primary energy consumption estimated for this desired value and the target design primary energy consumption Et. [Explanation of symbols]

[0090] 1 Design support system 5. External data input device 10 Control Unit 11 Design target value estimation section 13 Design Editorial Department 15 Shell calculation part

Claims

1. A design support system for building envelope design, a data providing unit that provides data related to the building; a design target value estimation unit for estimating a design target value of the building; a design editing unit for allowing a user to edit the building envelope information; an outer skin calculation unit that adjusts the edited outer skin information based on the design target value; The design target value estimation unit an acquisition step of acquiring required data for calculating the target design primary energy consumption of the building from the data providing unit; a first calculation step of calculating a target design primary energy consumption of the building based on the required data; a second calculation step of deriving a relationship between the design primary energy consumption and the air conditioning capacity using a property database including at least data on the design primary energy consumption and the air conditioning capacity of each of a plurality of existing buildings, and calculating a target air conditioning capacity corresponding to the target design primary energy consumption as the design target value based on this relationship; The outer skin calculation unit a third calculation step of acquiring envelope information of the building from the design editing unit, and calculating a thermal load of the building and a design air conditioning capacity, which is an air conditioning capacity corresponding to the thermal load, from the envelope information; The design support system further includes a display unit that displays the design air conditioning capacity and the target air conditioning capacity.

2. The required data is data relating to an energy reduction target value of the building, design information required to calculate a standard primary energy consumption of the building, and equipment information of the building, 2. The design support system of claim 1, wherein the first calculation step is a step of calculating the target design primary energy consumption of the building from the standard primary energy consumption of the building calculated from the design information and the energy reduction target value.

3. The design support system of claim 1, wherein the exterior calculation unit is configured to compare the design air conditioning capacity with the target air conditioning capacity, and if the design air conditioning capacity is greater than the target air conditioning capacity or if an adjustment instruction command is received, to execute an exterior adjustment process to adjust the exterior information so that the design air conditioning capacity is less than or equal to the target air conditioning capacity.

4. The design support system according to claim 3 , wherein the exterior information adjusted by the exterior calculation unit includes at least a window area, a window specification, a heat insulating material specification, or a solar shading specification.

5. the required data includes air conditioning specification information of the building, and the second calculation step is configured to select the plurality of existing buildings that match the building from the property database using the air conditioning specification information of the building when calculating the target air conditioning capacity; 2. The design support system according to claim 1, wherein the envelope calculation unit compares the design air conditioning capacity with the target air conditioning capacity, and if the design air conditioning capacity is greater than the target air conditioning capacity, executes a process of presenting to a user a change from the air conditioning specifications of the building to more efficient air conditioning specifications based on the air conditioning specification information of the building.

6. the property database further includes data on air conditioning design primary energy consumption, design information, and equipment information for a plurality of existing buildings; In the second calculation step, the design target value estimation unit a pre-process of deriving a first relationship between the design primary energy consumption and the air-conditioning design primary energy consumption for the plurality of existing buildings using the property database, and estimating an air-conditioning target primary energy consumption corresponding to the target design primary energy consumption based on this first relationship; a post-process of deriving a second relationship between air conditioning design primary energy consumption and air conditioning capacity for the plurality of existing buildings using the property database, and estimating the target air conditioning capacity corresponding to the air conditioning target primary energy consumption based on this second relationship.

7. 2. The design support system according to claim 1, wherein the design target value estimation unit extracts and uses data on a plurality of existing buildings from the property database that matches at least data regarding specified design information or specified equipment information of the building in the second calculation step.

8. The design support system according to claim 7 , wherein the predetermined design information is a building use and / or an area classification.

9. The design support system according to claim 7 , wherein the predetermined facility information is an air conditioning method and / or an air conditioning efficiency.

10. 2. The design support system according to claim 1, wherein the design target value estimation unit is configured to receive a predetermined initial air conditioning capacity from the design editing unit and to execute a back-calculation step of calculating an initial design primary energy consumption amount corresponding to the initial air conditioning capacity using the relationship.

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