Energy-saving performance evaluation system, energy-saving performance evaluation method, and energy-saving performance evaluation program

Abstract

This reduces the effort required from users to evaluate the energy efficiency performance of designed buildings. [Solution] The energy-saving performance evaluation system 1 has a control unit 21 that evaluates energy-saving performance. The control unit 21 acquires basic information about the structure and orientation of the design building to be evaluated, calculates a first load amount related to the environmental load of the standard building based on standard building information about the standard building, acquires customized specification information for adjusting the environmental load of the design building, calculates the solar radiation load using the basic information and customized specification information about the building envelope, identifies the air conditioning capacity corresponding to the solar radiation load, calculates a second load amount that can be compared with the first load amount using the air conditioning capacity and customized specification information about air conditioning and other equipment, and outputs a display comparing the first load amount and the second load amount to the display device of the user device 10.

Description

Technical Field

[0001] The present disclosure relates to an energy-saving performance evaluation system, an energy-saving performance evaluation method, and an energy-saving performance evaluation program.

Background Art

[0002] Towards the realization of carbon neutrality, energy-saving efforts are being made in the construction field. As an example of such efforts, for buildings that consume a large amount of energy, energy-efficient equipment and technologies are being introduced.

[0003] As evaluation methods for the energy-saving performance of buildings, the standard input method and the model building method are used (see, for example, Non-Patent Document 1). The standard input method is a method of calculating by inputting all the information of the building in detail for each room. For example, for air conditioning equipment, it is necessary to input the specifications of all the air conditioning heat source devices in the calculation target part by dividing the room for each heat source device. Therefore, with the standard input method, it takes time and effort for input and the like. In contrast, the model building method is a method of calculating using model buildings set for each use of buildings such as offices, hospitals, schools, etc., and can reduce the labor of the user.

[0004] Also, a system has been proposed that extracts structure data and equipment data from a three-dimensional model of a non-residential building (structure) and performs calculations for verifying the performance of the structure (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Non-Patent Documents

[0006]

Non-Patent Document 1

[0007] However, while the model building method reduces the effort required for data entry, it tends to underestimate the energy efficiency performance of the designed building. Furthermore, in the initial design phase, it is necessary to verify the impact of multiple building and equipment specifications on energy efficiency performance. Ideally, energy efficiency performance should be evaluated with high accuracy.

[0008] However, in the early stages of design, when considering various patterns, inputting data into numerous items as in the standard input method would require a great deal of effort from the user and prolong the evaluation time. Furthermore, in the early stages of design, including the proposal of building plans, a 3D model has not yet been generated, so a system like that described in Patent Document 1 cannot be used. [Means for solving the problem]

[0009] This disclosure provides an energy-saving performance evaluation system. The energy-saving performance evaluation system includes a control unit for evaluating energy-saving performance, which acquires basic information about the structure and orientation of the design building to be evaluated, calculates a first load amount related to the environmental load of the standard building based on standard building information relating to the standard building, acquires customized specification information for adjusting the environmental load of the design building, calculates the solar radiation load using the basic information and the customized specification information relating to the building envelope, identifies the air conditioning capacity corresponding to the solar radiation load, calculates a second load amount that can be compared with the first load amount using the air conditioning capacity and the customized specification information relating to the air conditioning equipment and other equipment, and outputs a display comparing the first load amount and the second load amount to a display device.

[0010] This disclosure provides an energy-saving performance evaluation method. The energy-saving performance evaluation method includes a control unit for evaluating energy-saving performance, which acquires basic information about the structure and orientation of the design building to be evaluated, calculates a first load amount related to the environmental load of the standard building based on standard building information relating to the standard building, acquires customized specification information for adjusting the environmental load of the design building, calculates the solar radiation load using the basic information and the customized specification information relating to the building envelope, identifies the air conditioning capacity corresponding to the solar radiation load, calculates a second load amount that can be compared with the first load amount using the air conditioning capacity and the customized specification information relating to the air conditioning equipment and other equipment, and outputs a display comparing the first load amount and the second load amount to a display device.

[0011] This disclosure provides an energy-saving performance evaluation program. The energy-saving performance evaluation program causes a control unit to evaluate energy-saving performance, and the control unit is configured to acquire basic information about the structure and orientation of the design building to be evaluated, calculate a first load amount related to the environmental load of the standard building based on standard building information relating to the standard building, acquire customized specification information for adjusting the environmental load of the design building, calculate the solar radiation load using the basic information and the customized specification information relating to the building envelope, identify the air conditioning capacity corresponding to the solar radiation load, calculate a second load amount that can be compared with the first load amount using the air conditioning capacity and the customized specification information relating to the air conditioning equipment and other equipment, and output a display comparing the first load amount and the second load amount to a display device. [Effects of the Invention]

[0012] This disclosure makes it possible to reduce the effort required of users to evaluate the energy-saving performance of designed buildings. [Brief explanation of the drawing]

[0013] [Figure 1] This is a schematic diagram of one embodiment of an energy-saving performance evaluation system. [Figure 2] This diagram shows an example of the data structure, with (a) being standard building information, (b) being setting information, (c) being designed building information, (d) being construction performance information, and (e) being prediction information. [Figure 3] This figure shows the hardware configuration of the information processing device of the same embodiment. [Figure 4] This is a flowchart of the procedure for evaluating the energy-saving performance of the embodiment. [Figure 5] This figure shows an example of a plan screen for the same embodiment. [Figure 6] This figure shows an example of the building specification setting screen for the same embodiment. [Figure 7] This figure shows an example of the equipment specification setting screen for another embodiment. [Figure 8](a) shows a graph of the relationship between the air conditioning capacity for simultaneous heating and cooling and the BEI, and (b) shows a graph of the relationship between the air conditioning capacity for heating / cooling switching and the BEI. [Figure 9] It is a diagram showing an example of an evaluation result screen of another embodiment. [Figure 10] It is a diagram showing an example of a planned case screen of a modification.

Mode for Carrying Out the Invention

[0014] Hereinafter, an embodiment of an energy-saving performance evaluation system, an energy-saving performance evaluation method, and an energy-saving performance evaluation program will be described. In this embodiment, the evaluation of the energy-saving performance of non-residential buildings will be described.

[0015] <Outline of Energy-Saving Performance Evaluation System> As shown in FIG. 1, an energy-saving performance evaluation system 1 (hereinafter referred to as evaluation system 1) includes a user device 10 and a server 20. The user device 10 is an information processing device used by a user who evaluates the energy-saving performance of a building. The server 20 uses the data transmitted from the user device 10 to evaluate the energy-saving performance of a building to be evaluated (hereinafter referred to as a design building). The server 20 transmits evaluation data as an evaluation result to the user device 10. The user checks the evaluation data output to the user device 10.

[0016] The server 20 is composed of one or more information processing devices. The server 20 includes a control unit 21, a reference building information storage unit 22, a setting information storage unit 23, a design building information storage unit 24, a building performance storage unit 31, and a prediction information storage unit 32. Hereinafter, a building to be compared with a design building is referred to as a "reference building". In this embodiment, the reference building is a virtual building assumed to apply the same conditions (for example, orientation and structure) as the design building and have a BEI (Building Energy Index), which is an index of the primary energy consumption of the building, of "1.0". [[ID=?]]

[0017] [[ID=?]] It seems there are some tags with incorrect or incomplete ID numbers in the original text. I've translated it as accurately as possible based on the provided rules. If you have any further clarification regarding those tags, please let me know.The control unit 21 functions as a basic planning unit 25, an envelope load calculation unit 26, a load amount calculation unit 27, a CO2 emission calculation unit 28, a cost calculation unit 29, and an output control unit 30 by executing an energy-saving performance evaluation program.

[0018] The basic planning unit 25 acquires basic information about the structure and orientation of the building to be designed from the user device 10 and stores the basic information in the setting information storage unit 23. The basic planning unit 25 updates the basic information or adds it as new data each time it receives new basic information from the user device 10.

[0019] Furthermore, the basic planning unit 25 retrieves standard building information from the standard building information storage unit 22, which stores standard building information related to the standard building, and calculates the first load amount related to the environmental load of the standard building based on the standard building information.

[0020] The building envelope load calculation unit 26 acquires customized specification information to adjust the environmental load of the designed building. This customized specification information includes data about the building envelope of the designed building. The building envelope load calculation unit 26 then uses the basic information of the designed building and the customized specification information about the building envelope to calculate the solar radiation load.

[0021] In this embodiment, the first load is the primary energy consumption. Primary energy consumption is the value obtained by converting the energy consumed by various equipment installed in the building into heat. The equipment includes air conditioning equipment, ventilation equipment, hot water supply equipment, lighting equipment, and elevator equipment. If a power generation system such as a solar power generation system is installed in the designed building, the amount of energy generated by the power generation system is subtracted from the amount of energy consumed by the equipment. For example, "GJ" and "MJ" can be used as units for primary energy consumption, but in evaluation system 1, these units do not need to be used as long as the energy saving performance can be evaluated relatively. For example, the energy saving performance of the designed building can be shown as a percentage of the energy saving performance of a standard building.

[0022] The load calculation unit 27 identifies the air conditioning capacity (hereinafter referred to as air conditioning capacity) corresponding to the solar radiation load. Air conditioning capacity indicates the capacity of the air conditioning equipment. The custom specification information includes data about the air conditioning equipment of the designed building. The load calculation unit 27 calculates the second load using the air conditioning capacity and the custom specification information regarding the air conditioning equipment. In this embodiment, the second load is the primary energy consumption and is expressed in the same units as the first load.

[0023] Furthermore, the load calculation unit 27 calculates the second load using customized specification information regarding the ventilation equipment, lighting equipment, and hot water supply equipment. This allows for the calculation of the second load for each piece of equipment and the second load for the entire building.

[0024] The CO2 emission calculation unit 28 calculates the CO2 emissions of the standard building and the design building using the primary energy consumption. The CO2 emission calculation unit 28 also calculates operational carbon emitted during the operation of the design building and embedded carbon emitted from non-operational activities such as construction, repair, and demolition.

[0025] The cost calculation unit 29 calculates the costs of the standard building and the design building using the primary energy consumption. The cost calculation unit 29 calculates the initial cost and the running cost as costs.

[0026] The output control unit 30 outputs a design screen, in which the user can select elements related to the building envelope, air conditioning equipment, and other equipment, as well as other screens, to the display device of the user device 10. In this embodiment, data for displaying various screens such as the design screen is transmitted to the user device 10. When an element is selected in the user device 10 based on the user's operation, the user device 10 transmits data indicating the selection, along with user identification data, to the server 20. The control unit 21 (for example, the output control unit 30) receives this data and stores it in the setting information storage unit 23, etc.

[0027] Furthermore, the output control unit 30 outputs a display device showing a comparison between the first load of the reference building and the second load of the design building. In this embodiment, the output control unit 30 outputs to the display device at least the primary energy consumption, CO2 emissions, cost, and an estimated BEI value based on the primary energy consumption for the reference building and the design building. BEI is the ratio of the design building's primary energy consumption to the reference building's primary energy consumption (design primary energy consumption / reference primary energy consumption).

[0028] The information stored in memory units 22-24, 31, and 32 will be explained with reference to Figure 2. As shown in Figure 2(a), the reference building information memory unit 22 stores the reference building information 220.

[0029] The reference building information 220 includes at least the following data: design building identification data, structure, orientation, standard primary energy consumption, BEI value, CO2 emissions, initial cost, and running cost. The design building identification data is the identification data of the design building to be compared with the reference building. The structure is identical to the structure of the design building. For example, the structure includes the building's planned site, building width, depth, number of floors, standard floor area, and total floor area. The orientation is identical to the orientation of the design building.

[0030] As shown in Figure 2(b), the setting information storage unit 23 stores setting information 230 for the design building to be evaluated. The setting information 230 is updated according to the elements selected by the user. The setting information 230 includes building identification data, basic information, building specifications, and equipment specifications. The building identification data is the identification data for the design building. The basic information includes the building's planned site, building width, depth, number of floors, standard floor area, and total floor area, etc.

[0031] The building identification data is the name or assigned number of the designed building. The site indicates the location of the land on which the designed building will be constructed. The building width, depth, number of floors, standard floor area, and total floor area are data for the designed building and can be set by the user.

[0032] The building specifications include the orientation of the main facade (the front of the building's exterior), the presence or absence of glass in the facade (exterior), the type of glass, the presence or absence of eaves, the height of openings, and information about the building structure. When glass is used in many parts of the facade, or when glass is used in facades facing directions with high solar radiation, the indoor temperature tends to rise easily, generally requiring a larger air conditioning capacity and increasing primary energy consumption. The opening height refers to the height of the openings in the facade. Glass material is installed in the openings. Generally, the larger the opening height, the larger the air conditioning capacity required and the higher the primary energy consumption.

[0033] Glass types include single-pane glass, double-pane glass, sun-shielding double-pane glass, and double-skin glass with a double-layer structure that allows air to circulate between the layers. When materials that block sunlight are used, the air conditioning capacity is generally reduced, and primary energy consumption tends to decrease.

[0034] The structural frame is a selection factor related to building materials that reduce CO2 emissions, such as low-carbon concrete (Cleancrete, registered trademark), electric furnace steel, and hybrid wood construction. CO2 emissions are reduced when low-carbon materials are used.

[0035] The equipment specifications include information on selectable elements related to air conditioning, ventilation, lighting, and hot water supply systems. The equipment specifications indicate the user-defined selectable elements. Building specifications and equipment specifications are part of the customized specifications information.

[0036] As shown in Figure 2(c), the design building information 240 includes at least building identification data, envelope load, air conditioning capacity, primary energy consumption, estimated BEI value, CO2 emissions, initial cost, and running cost data. The building identification data is linked to the building identification data in the setting information 230. The design building information 240 is data generated by the control unit 21 using the setting information 230 to evaluate the energy-saving performance of the design building.

[0037] As shown in Figure 2(d), the construction performance information 250 includes case identification data. The construction performance information 250 is information based on past cases (construction performance), and the case identification data is data assigned to each building. Before commencing construction on a building that meets certain conditions, the building owner is required to submit an energy conservation plan for the building to the relevant administrative authority. The construction performance information 250 is based on this energy conservation plan submitted. In addition to the case identification data, the construction performance information 250 includes basic information about the case, building specifications, equipment specifications, building envelope load, air conditioning capacity, primary energy consumption, BEI value, CO2 emissions, initial cost, and running cost.

[0038] As shown in Figure 2(e), the prediction information 260 includes at least the predicted impact values ​​for air conditioning equipment, ventilation equipment, lighting equipment, and hot water supply equipment. The prediction information is data verified based on the building performance information 250 and shows how much the elements of equipment that contribute to energy conservation (energy-saving items) affect the building's BEI value.

[0039] For example, the predicted impact of air conditioning equipment includes the predicted impact on the BEI value for each energy-saving item. For instance, if an air conditioning system capable of variable airflow control is selected for a designed building, the predicted impact on the BEI value is "-0.04". This indicates that selecting an air conditioning system capable of variable airflow control will lower the BEI value of the air conditioning system by approximately "-0.04". Since the BEI value decreases as the energy-saving performance of the designed building increases, the predicted impact values ​​for energy-saving items are 0 or negative, and the absolute value increases as the energy-saving effect increases.

[0040] <Hardware Configuration> Referring to Figure 3, the hardware configuration of the server 20 and the user device 10 will be described. The server 20 and the user device 10 are each composed of an information processing device H10.

[0041] The information processing device H10 comprises a processor H11, a communication device H12, and a storage device H13. Note that this hardware configuration is an example, and it can be implemented using other hardware.

[0042] The storage device H13 (computer-readable medium) stores data and various programs necessary to perform the above functions. Examples of storage devices H13 include ROM, RAM, and hard disks. Storage devices H13 include any available recording media that can be accessed by a general-purpose or dedicated computer. The storage device H13 contains the energy-saving performance evaluation program and various data used to execute the program.

[0043] The processor H11 reads programs and data stored in the memory device H13 via the bus H14, etc., and performs control using them. Examples of processor H11 include CPUs, MPUs, NPUs, etc. This processor H11 loads programs into RAM and executes various processes for each operation. The processor H11 is not limited to performing software processing for all the operations it performs. For example, the processor H11 may have dedicated hardware circuits (e.g., application-specific integrated circuits: ASICs) that perform hardware processing for at least a portion of the operations it performs. In other words, the processor H11 can be composed of any of the following:

[0044] [1] One or more H11 processors that operate according to a computer program (software) [2] One or more dedicated hardware circuits that perform at least some of the various processes. [3] Circuits (circuitry) that include combinations of these. By executing the energy-saving performance evaluation program stored in the memory device H13, the processor H11 functions as the basic planning unit 25 and other components described above. The control unit 21 is a hardware configuration that includes the processor H11 and other components for performing these functions.

[0045] Communication device H12 is an interface that establishes a communication path with other devices via a network and performs data transmission and reception via wireless or wired communication. Furthermore, the information processing device H10 may also include an input device H15 and a display device H16. The input device H15 is a device that receives user instructions, such as a touch panel, mouse, keyboard, or microphone. The display device H16 is one of the output devices, and is a display such as a liquid crystal panel or an organic EL panel. The information processing device H10 may also include other output devices, such as a speaker that outputs sound.

[0046] <Overview of Energy Efficiency Performance Evaluation> Referring to Figure 4, the procedure for evaluating the energy efficiency performance of the designed building will be explained. The control unit 21 acquires basic information of the designed building from the user device 10 (step S1). The control unit 21 stores the basic information in the setting information storage unit 23.

[0047] The control unit 21 generates reference building information 220 that matches the basic information and displays it on the display device H16 of the user device 10 (step S2). Here, the primary energy consumption, CO2 emissions, and cost of the reference building are calculated. The control unit 21 stores the generated reference building information 220 in the reference building information storage unit 22.

[0048] The control unit 21 sets the building specifications (step S3). Here, the control unit 21 receives the building specifications of the designed building from the user device 10 and stores them in the setting information storage unit 23. The control unit 21 sets the equipment specifications (step S4). Here, the control unit 21 receives customized specification information from the user device 10 as the equipment specifications for the designed building and stores it in the setting information storage unit 23.

[0049] The control unit 21 then displays the evaluation results of the designed building on the display device H16 of the user device 10 (step S5). The control unit 21 evaluates the energy-saving performance of the designed building using the reference building information 220 and the building specifications and equipment specifications entered by the user. The control unit 21 displays the reference information of the reference building and the evaluation results of the designed building on the display device H16. The evaluation results reflect the basic information obtained in step S1, the building specifications obtained in step S3, and the equipment specifications obtained in step S4. The evaluation results also include the primary energy consumption, CO2 emissions, and cost of the designed building.

[0050] <Acquiring basic information and displaying reference information> Referring to Figure 5, the acquisition of basic information of the designed building (Step S1) and the display of standard information (Step S2) will be explained in detail. Figure 5 is an example of a plan screen 40 output to the display device H16 of the user device 10. The user device 10 outputs web data transmitted from the server 20 to the display device H16. The web data includes files written in markup languages ​​such as HTML.

[0051] The plan screen 40 includes a site setting area 41, a building setting area 42, a map display area 43, an area display area 44, a building image area 45, and a reference building display area 46. The user enters the location of the site in the site setting area 41. Upon entering the location of the site, a map including the location is displayed in the map display area 43.

[0052] The building setting area 42 is where the user inputs the building width, depth, and number of floors. The area display area 44 displays the standard floor area and total floor area calculated from the aforementioned building width, depth, and number of floors information. The building image area 45 displays a building model 47 having a shape based on the settings in the building setting area 42. The orientation of the building model 47 may also be set in the building image area 45.

[0053] The user device 10 transmits the data entered in the planned site setting area 41, the building setting area 42, and the area display area 44 to the server 20. The server 20 stores this information as basic information in the setting information storage unit 23.

[0054] The control unit 21 also generates standard building information 220 that reflects the acquired basic information. Specifically, the control unit 21 includes the number of floors, total floor area, etc. set on the plan screen 40 as structural elements in the standard building information 220. The control unit 21 also identifies the standard primary energy consumption corresponding to the set total floor area from a graph (not shown) that correlates the total floor area with standard values ​​for primary energy consumption. Furthermore, the control unit 21 calculates CO2 emissions (operational carbon) and running costs from the standard primary energy consumption using a predetermined formula. It also calculates CO2 emissions (embossed carbon) and initial costs using the total floor area and a predetermined formula.

[0055] Furthermore, the plan screen 40 displays a button 40A for transitioning to the plan screen 40, and buttons 50A, 60A, and 70A for transitioning to the respective screens 50, 60, and 70, which will be described later.

[0056] <Setting building specifications> Referring to Figure 6, the setting of building specifications (step S3) will be explained. Figure 6 is an example of the building specifications setting screen 50. The building specifications setting screen 50 includes a orientation setting area 51, a glass position setting area 52, a type setting area 53, a structural frame setting area 54, an envelope load display area 55, and a comparison display area 56. In addition, the building specifications setting screen 50 may also include the width, depth, number of floors, and image of the building being designed.

[0057] In the orientation setting area 51, the orientation of the main facade is adjusted. Glass building materials are used for the main facade. In the glass position setting area 52, the presence or absence of glass building materials in facades other than the main facade is entered. In the type setting area 53, the type of glass, the presence or absence of eaves, and the opening height are entered. In the structural frame setting area 54, the type of structural frame is entered. The control unit 21 calculates the CO2 emissions (embodied carbon) of the designed building using the type of structural frame and a predetermined formula.

[0058] When an element is selected in the orientation setting area 51, the glass position setting area 52, the type setting area 53, and the structural frame setting area 54, the user device 10 transmits data containing the selected element to the server 20. The control unit 21 stores the orientation of the main facade as basic information in the setting information storage unit 23 from the received data, and stores the other received data as building specifications in the setting information storage unit 23.

[0059] The control unit 21 calculates the envelope load of the designed building based on the building specifications. For example, the control unit 21 may calculate the envelope load by dividing the sum of the direct heat load and the heat transfer load by the floor area of ​​the air-conditioned area, as shown in equation (1) below.

[0060] Envelope load = (Direct heat load + Heat transfer load) / Air conditioning area area ... (1) The direct heat load is the solar radiation load on the glass surface. The control unit 21 performs a solar radiation simulation on the designed building and calculates the amount of direct solar radiation for each of the east, west, north, and south sides based on the type of glass, presence or absence of eaves, and opening height entered in the type setting area 53.

[0061] The thermal transfer load is the sum of the exterior wall thermal transfer load and the glass surface thermal transfer load. The exterior wall thermal transfer load is calculated using the thermal transmittance of the exterior wall material, the outside air temperature, the indoor temperature, the standard floor area, the opening height of the standard floor, and the exterior wall area of ​​the standard floor. The glass surface thermal transfer load is calculated using the thermal transmittance of the glass surface, the outside air temperature, the indoor temperature, the standard floor area, and the opening height of the standard floor.

[0062] The control unit 21 displays the calculated building envelope load in the building envelope load display area 55. As illustrated in Figure 6, the building envelope load display area 55 may also show the range of change in the building envelope load when the building width, orientation, opening width, presence or absence of eaves, and glass type are changed.

[0063] Furthermore, the control unit 21 calculates provisional values ​​for the designed building, including the designed primary energy consumption, CO2 emissions, and BEI (Building Energy Index). The control unit 21 displays these provisional values ​​as numerical values ​​or graphs in the comparison display area 56.

[0064] <Setting equipment specifications> Next, the setting of equipment specifications (step S4) will be explained with reference to Figures 7 and 8. Figure 7 shows an example of the equipment specification setting screen 60. The equipment specification setting screen 60 includes an equipment specification setting area 61, a BEI estimated value display area 62, and a comparison display area 63.

[0065] The equipment specification setting area 61 includes areas for selecting each element (energy saving item) of the air conditioning equipment, ventilation equipment, lighting equipment, hot water supply equipment, and energy generation equipment. In the area for selecting the elements of the air conditioning equipment, the user inputs the heat source type, equipment efficiency, heating and cooling operation type, outside air intake during preheating, variable airflow control, number of units control, outside air cooling, total heat exchange, etc.

[0066] The control unit 21 obtains predicted impact values ​​for the BEI value corresponding to the selected element from the prediction information 260, and reflects these predicted impact values ​​in the estimated BEI value of the air conditioning equipment in the building being designed. If the predicted BEI impact value is "-0.04", "0.04" is subtracted from the estimated BEI value of the air conditioning equipment.

[0067] Furthermore, the equipment specification setting area 61 includes an area for selecting elements of lighting equipment specifications, an area for selecting elements of hot water supply equipment, and an area for selecting elements of energy generation systems (energy creation) such as solar power generation.

[0068] In the equipment specification setting area 61, the provisionally calculated primary energy consumption of the designed building can be reduced by selecting equipment elements such as high-efficiency equipment, simultaneous heating and cooling operation, and unit control. When an element is selected in the equipment specification setting area 61, the user device 10 transmits data containing the selected element to the server 20. The control unit 21 stores the received data as equipment specifications in the setting information storage unit 23.

[0069] Furthermore, the equipment specification setting area 61 includes a recommended value display area 64. The recommended value display area 64 displays the recommended value for air conditioning capacity per total floor area and the specified value for air conditioning capacity. The recommended value is an estimated value of the air conditioning capacity estimated to be necessary for the building envelope load of the designed building, as determined by the control unit 21, and refers to a value that serves as a guideline for the user to select the specified value for air conditioning capacity. In other words, the recommended value changes depending on the building envelope load of the designed building.

[0070] The control unit 21 calculates a recommended value using a predetermined formula. Based on the selected air conditioning capacity and the element selections for each item in the equipment specification setting area 61, an estimated BEI value is calculated. The control unit 21 calculates an estimated BEI value each time an element is selected and displays it on the display device H16.

[0071] Furthermore, the control unit 21 calculates an estimated BEI value based on the building specifications and equipment specifications and displays it in the estimated BEI value display area 62. The control unit 21 calculates an estimated BEI value based on the specified air conditioning capacity using a pre-stored graph or formula. The graph is a prediction graph of the estimated BEI value based on the combination of air conditioning capacity, selection of simultaneous cooling and heating model or cooling and heating switching model, equipment efficiency, and whether or not unit-based control is enabled.

[0072] Figure 8 shows examples of graphs 80 and 81 used to calculate approximate BEI values ​​for air conditioning equipment based on specified air conditioning capacity. The graphs are stored in the prediction information storage unit 32. Each graph 80 and 81 is pre-generated based on building performance information 250, etc.

[0073] The graph in Figure 8(a) shows the relationship between air conditioning capacity and BEI when a simultaneous cooling and heating model is selected, which allows switching between cooling and heating operation for each room. In this graph, the estimated BEI value increases as the air conditioning capacity increases. Graph 80 may further consist of multiple graphs depending on equipment efficiency, the presence or absence of unit-by-unit control, etc.

[0074] Furthermore, the control unit 21 can calculate the design primary energy consumption by multiplying the estimated BEI value by the standard primary energy consumption. The control unit 21 may also add or subtract predetermined correction values ​​or amounts of change obtained from other graphs depending on the elements selected in other items (such as variable airflow control) in the equipment specification setting area 61.

[0075] Figure 8(b) shows the relationship between air conditioning capacity and BEI change value when a cooling / heating switching model is selected, which operates a predetermined number of indoor units in either cooling or heating mode. When a cooling / heating switching model is selected, the estimated BEI value is calculated by reflecting the BEI change value identified using Figure 8(b) in the estimated BEI value identified using Graph 80 for the simultaneous cooling / heating model. The BEI change value decreases as the air conditioning capacity increases. Graph 81 may consist of multiple graphs corresponding to equipment efficiency and the presence or absence of unit-based control, etc.

[0076] In the area where elements of the ventilation system are selected, the user can choose whether or not to include a high-efficiency motor, an inverter, and airflow control. The control unit 21 obtains predicted impact values ​​on the BEI value corresponding to the selected elements from the prediction information 260 and reflects these predicted impact values ​​in the estimated BEI value of the ventilation system. If the predicted BEI impact value is "-0.01", "0.01" is subtracted from the estimated BEI value of the ventilation system.

[0077] In the area where lighting equipment elements are selected, the user can choose illuminance, lighting type, presence or absence of a person presence detection function, presence or absence of a brightness detection function, presence or absence of a schedule management function, and presence or absence of an initial illuminance correction function. The control unit 21 obtains predicted impact values ​​on the BEI value corresponding to the selected elements from the prediction information 260 and reflects these predicted impact values ​​in the approximate BEI value of the lighting equipment.

[0078] In the area where elements of the hot water supply equipment are selected, the user can choose whether or not to include power-saving devices and whether or not to include pipe insulation functions. The control unit 21 obtains predicted impact values ​​on the BEI value corresponding to the selected elements from the prediction information 260 and reflects these predicted impact values ​​in the estimated BEI value of the hot water supply equipment.

[0079] In this embodiment, since the elevator equipment accounts for a small percentage of the total primary energy consumption, the estimated BEI value for the elevator equipment is set to "1". The control unit 21 multiplies the estimated BEI value calculated for each piece of equipment by the standard value of the primary energy consumption share of each piece of equipment relative to the entire building. The share is a general value and is set as, for example, "61%" for air conditioning equipment and "5%" for ventilation equipment. For example, the control unit 21 multiplies the estimated BEI value of the air conditioning equipment by "61%" and the estimated BEI value of the ventilation equipment by "5%".

[0080] The control unit 21 then adds the value obtained by multiplying the estimated BEI value for each piece of equipment by the occupancy rate to obtain the design BEI value, and displays it in the estimated BEI value display area 62. At this time, the control unit 21 may display estimated BEI values ​​for each of the following: air conditioning (AC), ventilation (V), lighting (L), hot water supply (HW), and elevators (EV), as shown in Figure 7. In addition, in the area for selecting elements of the energy generation equipment, the user can select the installation area ratio of the solar power generation equipment, etc. Based on these user selections, the control unit 21 calculates and displays estimated BEI values. The user can adjust the estimated design BEI value to match the target estimated BEI value by selecting the selection elements for each piece of equipment.

[0081] Furthermore, the control unit 21 calculates CO2 emissions (operational carbon). Specifically, the control unit 21 calculates CO2 emissions (operational carbon) using a value obtained by multiplying the primary energy consumption by an estimated BEI value, as shown in equation (3). The control unit 21 displays the calculated CO2 emissions (operational carbon) in the comparison display area 63.

[0082] CO2 emissions (operational carbon) = (area of ​​use × primary energy consumption × estimated BEI value + amount of solar power generation energy - amount of renewable energy reduction) × reduction rate × conversion factor ... (3) The control unit 21 stores the calculated primary energy consumption, CO2 emissions, and costs for the designed building in the designed building information storage unit 24. The renewable energy reduction amount indicates the amount of energy reduced according to the number of renewable energy utilization methods applied to the designed building. The number of renewable energy utilization methods refers to the number of selections made regarding the use of renewable energy (geothermal energy, solar thermal energy, cool tubes, passive solar, night purging, natural ventilation, natural lighting) in the equipment specification setting area 61 of Figure 7. The reduction rate is a coefficient corresponding to the level of operational conditions that constitute efficient operation in the designed building. Here, the reduction rate is set to "1".

[0083] <Output of evaluation results> Next, the display of evaluation results (step S5) will be explained with reference to Figure 9. Figure 9 shows an example of the evaluation results screen 70. The evaluation results screen 70 includes at least a building specifications area 71, an equipment specifications setting area 72, and a comparison display area 73. The building specifications are displayed in the building specifications area 71. The equipment specifications are displayed in the equipment specifications setting area 72.

[0084] The comparison display area 73 displays the estimated BEI value, primary energy consumption, generated energy consumption, embedded carbon, operational carbon, initial cost ratio, and running cost ratio for the standard building, the designed building, and the designed building with solar power generation applied. The control unit 21 calculates the total primary energy consumption of the designed building from the designed BEI value and the standard primary energy consumption value. The control unit 21 also calculates the primary energy consumption for each piece of equipment, such as elevators, hot water supply equipment, lighting equipment, ventilation equipment, and air conditioning equipment, from the estimated BEI value for each piece of equipment, and displays it in a bar graph along with the generated energy.

[0085] The control unit 21 calculates the amount of energy generated based on the reference information of the reference building where the solar power generation equipment is installed. For example, the control unit 21 sets a predetermined percentage (10% to 70%) of the standard floor area of ​​the design building as the installation area for the solar power generation equipment. Then, it calculates the amount of energy generated by the design building by increasing or decreasing the amount of energy generated by the design building according to the ratio of the installation area of ​​the design building to the installation area of ​​the solar power generation equipment of the reference building. Finally, it reflects the amount of energy generated by the design building in the design primary energy consumption.

[0086] The control unit 21 also calculates running costs using primary energy consumption and the usage ratios of electricity, gas, kerosene, and heavy oil. Furthermore, it calculates initial costs using the building specification information and equipment customization specification information selected in the building specification area 71 and the equipment specification setting area 72, along with a predetermined formula.

[0087] In the comparison display area 73, the evaluations of the standard building and the design building are displayed side by side, allowing the user to visually see the impact of the design building's equipment on its energy-saving performance. Furthermore, the design building's evaluation also reflects the amount of energy generated, allowing the user to estimate the effectiveness of installing solar power generation equipment. In addition, the building specification setting screen 50 and the equipment specification setting screen 60 correspond to each item entered using the standard input method, and the calculated evaluation values ​​such as the BEI estimate are close to those of the standard input method, allowing for an accurate evaluation of the design building's energy-saving performance.

[0088] <Effects of this embodiment> As described above, the following effects can be obtained according to the embodiment. (1) In the above embodiment, the control unit 21 acquires basic information about the structure and orientation of the design building to be evaluated, and calculates the primary energy consumption related to the environmental load of the reference building based on the basic information. The control unit 21 also acquires customized specification information to adjust the environmental load of the design building, and uses the basic information and customized specification information regarding the building envelope to calculate the solar radiation load and identify the air conditioning capacity corresponding to the solar radiation load. Furthermore, the control unit 21 uses the air conditioning capacity and customized specification information regarding air conditioning and other various equipment to calculate the primary energy consumption of the design building, and outputs a display comparing these primary energy consumptions to the display device H16. Since the user only needs to input the basic information and customized specification information, the effort required from the user is reduced, and relatively accurate energy-saving performance evaluations can be performed in a short time. Therefore, the building specifications and equipment specifications can be verified in the initial stages of design so that energy-saving performance can be improved.

[0089] (2) In the above embodiment, the elements of the air conditioning and other various equipment selected on the equipment specification setting screen 60 are reflected in the primary energy consumption and BEI value and displayed in the comparison display area 63. Therefore, energy saving performance can be verified while selecting the air conditioning and other various equipment.

[0090] (3) In the above embodiment, the orientation and structural elements of the building design selected on the building specification setting screen 50 are reflected in the primary energy consumption and BEI value of the building design and displayed in the comparison display area 56. Therefore, energy saving performance can be verified while selecting air conditioning equipment.

[0091] <Example of changes> The above embodiments can be implemented with the following modifications. Each embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0092] <1st load amount> In the above embodiment, the first load was set to the primary energy consumption. Alternatively, the first load may be other parameters such as cost or CO2 emissions.

[0093] <Draft Plan Screen> As shown in Figure 10, when a location is entered on the plan screen 40, the building model 100 may be displayed in the map display area 43. Alternatively, the orientation of the designed building may be determined by rotating the building model 100. Furthermore, the total floor area and the area of ​​the standard floor may be changed by changing the size of the building model 100.

[0094] <Building specifications and equipment specifications> In the above embodiment, the control unit 21 receives customized specification information for building specifications and equipment specifications from the user device 10 and reflects it in the second load, which is the designed primary energy consumption, etc. Alternatively, the control unit 21 may acquire only customized specification information for equipment specifications and reflect it in the second load, which is the designed primary energy consumption, etc. In this case, the control unit 21 sets the envelope load of the designed building to be the same as that of the standard building.

[0095] <Energy-saving performance evaluation system> In the above embodiment, the server 20 executes the energy-saving performance evaluation program and displays the evaluation results on the display device H16 of the user device 10. Alternatively, the user device 10 may execute the energy-saving performance evaluation program and display the evaluation results on the display device H16. In this case, the user device 10 has the energy-saving performance evaluation program implemented. The processor H11 of the user device 10 executes the above program and constitutes the control unit 21. Also, each screen 40, 50, 60, and 70 may be output by the user device 10 after reading from the storage device H13, rather than being web data transmitted from the server 20.

[0096] In the above embodiment, the energy-saving performance evaluation system 1 includes a reference building information storage unit 22, a setting information storage unit 23, a design building information storage unit 24, a building performance storage unit 31, and a prediction information storage unit 32. The energy-saving performance evaluation system 1 may provide these storage units 22-24, 31, and 32 as a single storage device H13, or as multiple storage devices H13. Furthermore, if the storage units 22-24, 31, and 32 are provided as multiple storage devices H13, they may each be provided on a different information processing device.

[0097] In the above embodiment, the energy-saving performance evaluation system 1 includes a building performance storage unit 31 that stores building performance information 250. The building performance information 250 may be transmitted from multiple user devices 10. As a result, building performance information 250 is collected from a large number of users, and the reliability of the prediction information 260 is increased by the increase in the number of samples.

[0098] In the above embodiment, an example was described in which the energy-saving performance evaluation system 1 evaluates the energy-saving performance of a non-residential building. The energy-saving performance evaluation system 1 may also be a system for evaluating the energy-saving performance of a house. In this case, the energy-saving performance evaluation system 1 will be adapted to the standards for energy-saving performance of a house.

[0099] In the above embodiment, the design primary energy consumption when a solar power generation system is installed in the designed building was evaluated, but this may be omitted. Next, the technical concepts that can be understood from the above embodiments and alternative examples are described below.

[0100] [A] An evaluation system characterized in that the first load and the second load are carbon dioxide emissions corresponding to the life cycle of the building. [B] The control unit further evaluates the cost of the customized specification information and outputs the evaluation result, the energy-saving performance evaluation system according to claim 1. [Explanation of Symbols]

[0101] 1...Energy saving performance evaluation system, 10...User device, 20...Server, 21...Control unit, 22...Reference building information storage unit, 23...Setting information storage unit, 24...Design building information storage unit, 220...Reference building information, H16...Display device.

Claims

1. The control unit that evaluates energy saving performance Basic information on the structure and orientation of the design building to be evaluated is obtained, and the first load amount related to the environmental load of the standard building is calculated based on the standard building information of the standard building. To obtain customized specification information for adjusting the environmental load of the aforementioned designed building, Using the aforementioned basic information and the aforementioned customized specification information regarding the building envelope, the solar radiation load is calculated. The air conditioning capacity corresponding to the aforementioned solar radiation load is determined, Using the aforementioned air conditioning capacity and the aforementioned customized specification information regarding the air conditioning equipment and other equipment, a second load amount that can be compared with the first load amount is calculated. An energy-saving performance evaluation system that outputs a display comparing the first load and the second load to a display device.

2. The control unit, A settings screen is displayed on the display device that allows the user to select elements of each piece of equipment, including the aforementioned air conditioning equipment. The aforementioned customization specification information includes data indicating the element selected on the settings screen, The energy-saving performance evaluation system according to claim 1, wherein the setting screen displays the first load amount of the reference building and the second load amount of the design building in which the elements selected by the user are reflected.

3. The control unit, A settings screen is displayed on the display device that allows the user to select elements related to the orientation and structure of the aforementioned building design. The aforementioned customization specification information includes data indicating the element selected on the settings screen, The energy-saving performance evaluation system according to claim 1, wherein the setting screen displays the first load amount of the reference building and the second load amount of the design building in which the elements selected by the user are reflected.

4. The first load and the second load are the primary energy consumption of the designed building, The memory unit stores predicted values ​​of the influence that each element of the equipment, including the air conditioning equipment, has on the ratio of the second load to the first load. The energy-saving performance evaluation system according to any one of claims 1 to 3, wherein the control unit acquires the predicted value corresponding to the element selected by the user based on the customized specification information, and reflects the acquired predicted value in the proportion of the designed building.

5. The amount of energy generated will be reduced if a solar power generation system is installed in the aforementioned building, The energy-saving performance evaluation system according to claim 1, wherein the display device outputs a display comparing the first load, the second load, and the load obtained by subtracting the energy generation amount from the second load.

6. The control unit that evaluates energy saving performance Basic information on the structure and orientation of the design building to be evaluated is obtained, and the first load amount related to the environmental load of the standard building is calculated based on the standard building information of the standard building. To obtain customized specification information for adjusting the environmental load of the aforementioned designed building, Using the aforementioned basic information and the aforementioned customized specification information regarding the building envelope, the solar radiation load is calculated. The air conditioning capacity corresponding to the aforementioned solar radiation load is determined, Using the aforementioned air conditioning capacity and the aforementioned customized specification information regarding the air conditioning equipment and other equipment, a second load amount that can be compared with the first load amount is calculated. An energy-saving performance evaluation method that outputs a display comparing the first load and the second load to a display device.

7. An energy-saving performance evaluation program that causes the control unit to evaluate energy-saving performance, The control unit, Basic information on the structure and orientation of the design building to be evaluated is obtained, and the first load amount related to the environmental load of the standard building is calculated based on the standard building information of the standard building. To obtain customized specification information for adjusting the environmental load of the aforementioned designed building, Using the aforementioned basic information and the aforementioned customized specification information regarding the building envelope, the solar radiation load is calculated. The air conditioning capacity corresponding to the aforementioned solar radiation load is determined, Using the aforementioned air conditioning capacity and the aforementioned customized specification information regarding the air conditioning equipment and other equipment, a second load amount that can be compared with the first load amount is calculated. An energy-saving performance evaluation program that functions as a means for outputting a display comparing the first load and the second load to a display device.

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