Discharge amount calculation device, discharge amount calculation method, and discharge amount calculation program

Abstract

The emission calculation unit (21) calculates the CO2 emissions of the target building at various stages from construction to demolition. The means setting unit (23) sets a reduction means that has a CO2 emission reduction effect at a setting stage, which is any of the multiple stages. The impact determination unit (24) determines the impact stage on the CO2 emissions caused by the set reduction means, including stages other than the setting stage. The emission calculation unit (21) recalculates the CO2 emissions for the determined impact stage.

Description

Technical Field

[0001] This disclosure relates to technologies that support the development of plans to bring CO2 emissions from buildings below target levels. Background Technology

[0002] The definitions of LCCM and ZCB were established for future carbon neutrality. LCCM stands for Life Cycle Carbon Minus, and ZCB stands for Zero Carbon Building. Both LCCM and ZCB define a building's CO2 balance as negative throughout its lifecycle. The CO2 emissions referred to here are the total CO2 emissions minus the CO2 reductions achieved through methods such as personal consumption of solar power or selling surplus electricity. The building's lifecycle extends from construction to disposal, specifically including construction, operation, renovation, and disposal. The building's lifecycle can also include raw material procurement before construction begins.

[0003] To achieve LCCM and ZCB, a plan needs to be developed to keep CO2 emissions below target values. Developing this plan requires predicting CO2 emissions at each stage of a building's lifecycle. Patent Document 1 describes a method for calculating CO2 emissions at each stage of a building's lifecycle based on its design data.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-041117 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] The plan incorporates measures to reduce CO2 emissions if the result of subtracting CO2 reductions from total CO2 emissions is not below the target value. Predicting CO2 emissions under these measures is necessary; however, recalculating CO2 emissions across all phases would require a lengthy process.

[0009] Alternatively, CO2 emissions could be recalculated only for the phase in which reduction measures were implemented. However, depending on the reduction measures employed, the impact can sometimes extend beyond the initial phase to other phases. Therefore, recalculating CO2 emissions only for the phase in which reduction measures were implemented cannot predict the appropriate level of CO2 reduction.

[0010] The purpose of this disclosure is to enable high-precision prediction of CO2 emissions when reduction measures are implemented, while minimizing processing time.

[0011] Methods for solving problems

[0012] The emission calculation apparatus disclosed herein includes: an emission calculation unit that calculates CO2 emissions for a target building at multiple stages from construction to abandonment; a means setting unit that sets a reduction means having a CO2 emission reduction effect at a setting stage which is any one of the multiple stages; and an impact determination unit that determines an impact stage in which the reduction means set by the means setting unit affects CO2 emissions, the impact stage also including stages other than the setting stage, and the emission calculation unit recalculates CO2 emissions for the impact stage determined by the impact determination unit.

[0013] Invention Effects

[0014] In this disclosure, the impact stages of reduction measures on CO2 emissions are identified, and CO2 emissions are recalculated for each impact stage. This allows for high-precision prediction of CO2 emissions even when reduction measures are implemented, while minimizing treatment time. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the emission calculation device 10 according to Embodiment 1.

[0016] Figure 2 This is a flowchart illustrating the processing flow of the emission calculation device 10 according to Embodiment 1.

[0017] Figure 3 This is a diagram illustrating an example of the reduction method in Implementation 1.

[0018] Figure 4 This is an explanatory diagram of the influence range information 34 of implementation method 1.

[0019] Figure 5 This is a structural diagram of the emission calculation device 10 of Embodiment 2.

[0020] Figure 6 This is a flowchart illustrating the processing flow of the emission calculation device 10 according to Embodiment 2.

[0021] Figure 7 This is a flowchart illustrating the processing flow of the emission calculation device 10 according to Embodiment 3.

[0022] Figure 8 This is an explanatory diagram of the influence range information 34 of implementation method 3.

[0023] Figure 9 This is a flowchart illustrating the processing flow of the emission calculation device 10 according to Embodiment 4.

[0024] Figure 10 This is a structural diagram of the emission calculation device 10 of embodiment 5.

[0025] Figure 11 This is a flowchart illustrating the processing flow of the emission calculation device 10 according to Embodiment 5. Detailed Implementation

[0026] Implementation method 1.

[0027] The emission calculation device 10 for calculating the CO2 emissions of the target building will be described. In Embodiment 1, the life cycle of the building is defined as including four stages: construction stage, operation stage, renovation stage, and abandonment stage. The construction stage is the stage related to the construction of the target building, including the manufacture of materials and construction of the target building. The operation stage is the stage related to the use of energy, light, heat, water, etc., of the constructed target building. The renovation stage is the stage related to renovation, such as the repair and replacement of the building structure and equipment of the constructed target building. The abandonment stage is the stage related to abandonment, such as the dismantling and removal of the target building after its operation ends and the disposal of waste.

[0028] Structural description

[0029] Reference Figure 1 The structure of the emission calculation device 10 of Embodiment 1 will be explained.

[0030] The emission calculation device 10 is a computer.

[0031] The emissions calculation device 10 includes hardware such as a processor 11, a memory 12, a storage device 13, and a communication interface 14. The processor 11 is connected to other hardware via signal lines and controls these other hardware components.

[0032] Processor 11 is the IC that performs processing. IC is short for Integrated Circuit. Specifically, processor 11 can be a CPU, DSP, or GPU. CPU is short for Central Processing Unit. DSP is short for Digital Signal Processor. GPU is short for Graphics Processing Unit.

[0033] Memory 12 is a storage device for temporarily storing data. Specifically, memory 12 is SRAM or DRAM. SRAM is short for Static Random Access Memory. DRAM is short for Dynamic Random Access Memory.

[0034] Storage device 13 is a storage device for storing data. As a specific example, storage device 13 is an HDD. HDD is short for Hard Disk Drive. Alternatively, storage device 13 can also be a removable recording medium such as an SD (trademarked) memory card, CompactFlash (trademarked), NAND flash memory, floppy disk, optical disc, compressed disc, Blu-ray disc, or DVD. SD is short for Secure Digital. DVD is short for Digital Versatile Disk.

[0035] Communication interface 14 is an interface used for communicating with external devices. Specifically, communication interface 14 is a port for Ethernet (registered trademark), USB, or HDMI (registered trademark). USB is short for Universal Serial Bus. HDMI is short for High-Definition Multimedia Interface.

[0036] The emission calculation device 10 includes an emission calculation unit 21, a target determination unit 22, a means setting unit 23, and an impact determination unit 24 as functional components. The functions of each functional component of the emission calculation device 10 are implemented by software. The emission calculation unit 21 includes a construction calculation unit 211, an operation calculation unit 212, a modification calculation unit 213, and a disposal calculation unit 214.

[0037] The memory 13 stores a program that implements the functions of each functional component of the emission calculation device 10. This program is read into the memory 12 by the processor 11 and executed by the processor 11. Thus, the functions of each functional component of the emission calculation device 10 are implemented.

[0038] The storage device 13 stores design information 31, application plan information 32, modification plan information 33, and scope of impact information 34.

[0039] exist Figure 1 Only one processor 11 is shown in the diagram. However, there can be multiple processors 11, and multiple processors 11 can cooperate to execute programs that implement various functions.

[0040] Description of the action

[0041] Reference Figures 2 to 4 This explains the operation of the emission calculation device 10 in Embodiment 1.

[0042] The operation steps of the emission calculation device 10 in Embodiment 1 are equivalent to the emission calculation method in Embodiment 1. Furthermore, the program for implementing the operation of the emission calculation device 10 in Embodiment 1 is equivalent to the emission calculation program in Embodiment 1.

[0043] Reference Figure 2 The processing flow of the emission calculation device 10 in Implementation Method 1 is explained.

[0044] (Step S11: Design Information Acquisition and Processing)

[0045] The emission calculation unit 21 obtains the design information 31, operation plan information 32, and renovation plan information 33 of the target building.

[0046] Specifically, the emissions calculation unit 21 obtains design information 31, usage plan information 32, and renovation plan information 33 of the target building, input by the user. The user is, for example, the building's designer. Design information 31 includes BIM data, CAD data, information representing the total building area and number of floors, etc. BIM stands for Building Information Modeling. CAD stands for Computer-Aided Design. Usage plan information 32 determines the usage methods for the target building's energy, lighting / heat / water, and related equipment. Renovation plan information 33 determines the renovation methods and timing for various parts of the target building.

[0047] (Step S12: Emissions calculation and processing)

[0048] Based on the design information 31, application plan information 32, and renovation plan information 33 obtained in step S11, the emission calculation unit 21 calculates the CO2 emissions of the target building at each of the multiple stages from construction to decommissioning.

[0049] Specifically, the construction calculation unit 211 calculates the CO2 emissions of the target building during the construction phase based on design information 31. The operation calculation unit 212 calculates the CO2 emissions of the target building during the operation phase based on design information 31 and operation plan information 32. The renovation calculation unit 213 calculates the CO2 emissions of the target building during the renovation phase based on design information 31 and renovation plan information 33. The abandonment calculation unit 214 calculates the CO2 emissions of the target building during the abandonment phase based on design information 31.

[0050] Here, CO2 emissions include not only CO2 emissions from energy consumption, but also CO2 emissions reduced by electricity generation. In other words, CO2 emissions are the amount obtained by subtracting the reduction in CO2 emissions from the total CO2 emissions. This reduction can be achieved, for example, by generating electricity through solar power.

[0051] (Step S13: Target determination and processing)

[0052] The target determination unit 22 determines whether the sum of the CO2 emissions of each of the multiple stages calculated in step S22 is below the target amount.

[0053] Specifically, the target determination unit 22 calculates the total CO2 emissions by summing the CO2 emissions from each stage calculated in step S22. That is, the target determination unit 22 calculates the total CO2 emissions by summing the CO2 emissions from the construction stage, the operation stage, the renovation stage, and the decommissioning stage. The target determination unit 22 determines whether the total CO2 emissions are below the target amount. The target amount is a pre-set value. For example, if the goal is to achieve LCCM and ZCB, the target amount is 0.

[0054] If the total quantity is below the target quantity, the target determination unit 22 will prompt the previously set reduction measures in step S14 (described later) and end the process. On the other hand, if the total quantity is greater than the target quantity, the target determination unit 22 will cause the process to proceed to step S14.

[0055] (Step S14: Method setting process)

[0056] The means setting unit 23 sets a reduction means that has the effect of reducing CO2 emissions in the setting stage, which is any of the multiple stages.

[0057] Specifically, the means setting section 23 is as follows: Figure 3 As shown, one reduction method to be used is set from among the multiple reduction methods prepared for each stage. For example, the method setting unit 23 sets the reduction method specified by the user.

[0058] (Step S15: Impact Determination Processing)

[0059] The impact determination unit 24 determines the stage in which the reduction measures set in step S14 affect CO2 emissions, i.e., the impact stage. Here, the impact determination unit 24 also determines the impact stage, which includes stages other than the set stage corresponding to the reduction measures set in step S14.

[0060] Specifically, the impact determination unit 24 determines the impact stage by referring to the impact scope information 34. For example... Figure 4 As shown, the scope of impact information 34 illustrates the stages that affect CO2 emissions for each of the multiple reduction measures. In Figure 4 In the diagram, the stage corresponding to the reduction measures, i.e. the set stage, naturally has a CO2 emission reduction effect and is therefore marked with a diagonal line. For stages other than the set stage, the options are set as having an effect (〇) and having no effect (×). Having an effect means that CO2 emissions increase or decrease.

[0061] The following are specific examples that have an impact on CO2 emissions outside of the set phase.

[0062] (1) If the material is changed from steel frame to wood during the construction phase, the thermal insulation will change. This will affect the CO2 emissions during the operation phase.

[0063] (2) If the operating time of the equipment is changed during the operation phase, the service life of the equipment will change. This will affect the CO2 emissions during the retrofit phase.

[0064] (3) During the retrofit phase, the retrofit period is extended from 10 years to 13 years. In this case, CO2 emissions are reduced during the retrofit phase. However, the operation of the old equipment between 11 and 13 years after installation will affect CO2 emissions during the operational phase.

[0065] The impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage, causing the process to return to step S12. Therefore, in step S12, the emission calculation unit 21 recalculates the CO2 emissions using the reduction measures set in step S14.

[0066] In this way, additional reduction measures are implemented until the combined CO2 emissions from each of the multiple phases are below the target level. Thus, the plans for each phase are gradually refined (brushed up), ultimately leading to a plan where the combined CO2 emissions are below the target level.

[0067] right Figure 2 The calculation method for CO2 emissions in each stage of step S12 is explained.

[0068] (Construction Phase)

[0069] The emission calculation unit 21 calculates the CO2 emissions for each building material, such as concrete and steel reinforcement. First, the emission calculation unit 21 calculates the quantity of each building material based on the design information 31. Then, for each building material, the emission calculation unit 21 multiplies the calculated quantity by a CO2 conversion factor to calculate the CO2 emissions for that building material.

[0070] Furthermore, the emission calculation unit 21 calculates the CO2 emissions incurred in transporting each building material. For each building material, the emission calculation unit 21 multiplies the transport volume by the transport distance by a CO2 conversion factor to calculate the CO2 emissions incurred in transporting that building material. Additionally, for each building material, if the manufacturing location can be determined, the emission calculation unit 21 determines the transport distance from the manufacturing location to the construction site. If the manufacturing location cannot be determined, the emission calculation unit 21 may use a predetermined distance as the transport distance.

[0071] The emission calculation unit 21 calculates the CO2 emissions during the construction phase by summing the CO2 emissions of each building material and the CO2 emissions incurred in transporting each building material.

[0072] In addition, regarding the CO2 conversion factor, we will consider using the information set in the emission intensity database.

[0073] (Application Phase)

[0074] The emission calculation unit 21 obtains information from the design information 31, including the layout and area of ​​each room, the insulation of walls and windows, and the capacity of equipment installed in each room. Furthermore, the emission calculation unit 21 obtains annual average climate information for the region where the target building is located from servers such as those of a meteorological bureau. Using this information, the emission calculation unit 21 estimates the annual energy consumption of each piece of equipment under the operating plan shown in the operation plan information 32. This equipment includes air conditioners, ventilation systems, lighting fixtures, hot water supply systems, and elevators, among others. In estimating energy consumption, a simulator that reproduces a digital twin of the building and estimates the energy consumption of each piece of equipment is considered.

[0075] The emission calculation unit 21 calculates the energy consumption of the target building from construction to abandonment based on the estimated annual energy consumption. The period from construction to abandonment of the target building is, for example, 50 years. Alternatively, the emission calculation unit 21 can multiply the annual energy consumption by the number of years in the period from construction to abandonment of the target building to calculate the energy consumption for that period. Furthermore, it can calculate the annual energy consumption by multiplying the deterioration coefficient of each piece of equipment by the annual energy consumption for each year after construction, and then sum the calculated energy consumption to calculate the energy consumption for that period.

[0076] The emissions calculation unit 21 calculates CO2 emissions by multiplying the energy consumption of the target building from construction to abandonment by a CO2 conversion factor. Regarding the CO2 conversion factor, the value corresponding to the power company with which the target building has a contract can be considered.

[0077] During the application phase, there is a possibility of implementing measures to reduce CO2 emissions. For example, there is a possibility of installing solar power generation equipment on the target building. When solar power generation equipment is installed, the emissions calculation unit 21 obtains the capacity, installation location, orientation, and angle of the solar power generation equipment from the design information 31. Furthermore, the emissions calculation unit 21 obtains the annual average sunshine duration and sunshine hours for the area where the target building is located from a server such as a meteorological bureau. The emissions calculation unit 21 uses the obtained information to estimate the power generation capacity. The emissions calculation unit 21 multiplies the estimated power generation capacity by a CO2 conversion factor to calculate the CO2 reduction.

[0078] Then, the emission calculation unit 21 calculates the CO2 emissions during the application phase by subtracting the reduction amount from the CO2 emissions mentioned above.

[0079] (Renovation Phase)

[0080] The emission calculation unit 21 determines the number and frequency of replacements for each building material and piece of equipment based on the renovation plan information 33. The renovation plan information 33 specifies replacement schedules for each building material and piece of equipment based on factors such as lifespan. The emission calculation unit 21 calculates CO2 emissions by multiplying the number of replacements by the number of replacements for each building material and piece of equipment by a CO2 conversion factor. The emission calculation unit 21 then sums the calculated CO2 emissions for each building material and piece of equipment to calculate the total CO2 emissions during the renovation phase.

[0081] In addition, CO2 conversion factors should be obtained from the emission intensity database used during the construction phase.

[0082] (Abandonment phase)

[0083] The emission calculation unit 21 calculates the total building area and the amount of waste of the target building based on the design information 31. The emission calculation unit 21 multiplies the total building area and the amount of waste by the CO2 conversion factor for dismantling and landfilling, and calculates the CO2 conversion factor for the disposal stage.

[0084] In addition, regarding the CO2 conversion factor, information set in the emission intensity database used to calculate CO2 emissions during the construction phase will be considered.

[0085] In addition to calculating CO2 emissions, costs can also be calculated at each stage. By showing the calculated costs to users, it is easy to consider costs when choosing reduction measures.

[0086] The methods for calculating costs at each stage are explained.

[0087] (Construction Phase)

[0088] The emission calculation unit 21 calculates the cost of each building material and each piece of equipment. First, the emission calculation unit 21 calculates the quantity of each building material and each piece of equipment based on the design information 31. Then, for each building material and each piece of equipment, the emission calculation unit 21 multiplies the calculated quantity by the unit price to calculate the cost of that building material or equipment.

[0089] The emission calculation unit 21 calculates the cost of transporting each building material and each piece of equipment. For each building material and each piece of equipment, the emission calculation unit 21 calculates the number of trucks required based on the transport volume. The emission calculation unit 21 multiplies the number of trucks by the transport distance and then by the transport unit price (fuel cost + labor cost) to calculate the transport cost.

[0090] The emission calculation unit 21 calculates the cost (labor cost) incurred in the construction work. Based on the design information 31, the emission calculation unit 21 calculates the total building area of ​​the target building. The emission calculation unit 21 multiplies the total building area by the work unit price (JPY / m²). 2 ), calculate the cost incurred when performing the task.

[0091] The emission calculation unit 21 calculates the construction phase cost by summing the costs of each building material and equipment, the costs of transporting each building material and equipment, and the costs of construction operations.

[0092] (Application Phase)

[0093] The emissions calculation unit 21 calculates the annual purchased and sold electricity based on the annual energy consumption and generation. The emissions calculation unit 21 calculates the contracted electricity (kW) and used electricity (kWh) based on the annual purchased electricity, multiplying them by the basic fee (JPY / kW) and the electricity fee (JPY / kWh) respectively to calculate the cost of purchasing electricity. Furthermore, the emissions calculation unit 21 multiplies the annual sold electricity by the electricity price (JPY / kWh) to calculate the cost of selling electricity. The costs of purchasing and selling electricity are then added together to calculate the costs during the operation phase.

[0094] (Renovation Phase)

[0095] The emission calculation unit 21 determines the number of replacements and the number of replacements for each building material and each piece of equipment based on the renovation plan information 33. For each building material and each piece of equipment, the emission calculation unit 21 multiplies the number of replacements by the number of replacements by the unit price to calculate the cost of that building material or equipment.

[0096] In addition, the emission calculation unit 21 calculates the costs incurred in transportation and operations in the same way as in the construction phase. Then, the emission calculation unit 21 sums up the costs of each building material and each piece of equipment, the costs incurred in transporting each building material and each piece of equipment, and the costs incurred in operations to calculate the cost of the renovation phase.

[0097] (Abandonment phase)

[0098] The emission calculation unit 21 calculates the total building area and the amount of waste of the target building based on the design information 31. The emission calculation unit 21 multiplies the total building area and the amount of waste by the unit price to calculate the cost of the disposal phase.

[0099] illustrate Figure 2 The method for selecting reduction measures in step S14.

[0100] As described above, the user can also select any reduction method. However, the method setting unit 23 may also preferentially select a reduction method extracted by any of the following methods (1) to (3). For example, the method setting unit 23 may also display reduction methods extracted by any of the following methods (1) to (3), allowing the user to select the reduction method to be set. Furthermore, the method setting unit 23 may also set any reduction method among the reduction methods extracted by any of the following methods (1) to (3).

[0101] (Method 1)

[0102] The means setting unit 23 selects reduction measures that have the shortest processing time required to recalculate CO2 emissions. Reduction measures with short processing time for recalculating CO2 emissions are those with no or few impact stages. For example, the means setting unit 23 selects reduction measures with the fewest impact stages.

[0103] (Method 2)

[0104] The method setting section 23 extracts reduction methods that significantly reduce CO2 emissions. Specifically, in Figure 3 In the list of reduction measures shown, a reference value for the CO2 emission reduction amount of each reduction measure is maintained in advance. The measure setting unit 23 refers to this reference value to extract the reduction measure with the largest reduction amount, the reference number of reduction measures starting from the reduction measure with the largest reduction amount, or all reduction measures with a reduction amount greater than the reference amount.

[0105] A reference value for the reduction in CO2 emissions is calculated by averaging the trial results of reductions for multiple buildings designed in the past using the total building area.

[0106] By prioritizing reduction methods that result in larger reductions, it is possible to bring the total emissions below the target level with fewer reduction measures. As a result, the processing time required to recalculate CO2 emissions can be reduced.

[0107] (Method 3)

[0108] The method setting department 23 extracts low-cost reduction methods. Specifically, in Figure 3 In the list of reduction measures shown, a reference value for the cost of each reduction measure is maintained in advance. The measure setting unit 23 refers to this reference value and extracts the reduction measure with the lowest cost, a base number of reduction measures starting from the lowest cost reduction measure, or all reduction measures with a cost less than the base value.

[0109] A reference value for cost is calculated by averaging the cost estimates of multiple buildings designed in the past using the total building area.

[0110] Effects of Implementation Method 1

[0111] As described above, the emission calculation device 10 of Embodiment 1 determines the impact stage of the reduction measures on CO2 emissions and recalculates CO2 emissions only for the impact stage. Therefore, it is possible to predict CO2 emissions with high accuracy when reduction measures are implemented while minimizing processing time.

[0112] Other structures

[0113] <Variation Example 1>

[0114] In Implementation Example 1, each functional component is implemented by software. However, as a variation 1, each functional component can also be implemented by hardware. Regarding this variation 1, the differences from Implementation Example 1 will be explained.

[0115] When the various functional components are implemented in hardware, the emission calculation device 10 has electronic circuitry instead of the processor 11, memory 12, and storage device 13. The electronic circuitry is a dedicated circuitry that implements the functions of each functional component, the memory 12, and the storage device 13.

[0116] As an electronic circuit, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, a GA, an ASIC, or an FPGA is contemplated. GA is an abbreviation for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuit. FPGA is an abbreviation for Field-Programmable Gate Array.

[0117] Each functional component can be implemented by one electronic circuit, or each functional component can be dispersed among multiple electronic circuits for implementation.

[0118] <Variant Example 2>

[0119] As Variant Example 2, it is also possible that some of the functional components are implemented by hardware and the other functional components are implemented by software.

[0120] The processor 11, the memory 12, the storage 13, and the electronic circuit are referred to as a processing circuit. That is, the functions of each functional component are implemented by the processing circuit.

[0121] In addition, the "section" in the above description can also be replaced with "circuit", "process", "step", "processing", or "processing circuit".

[0122] Embodiment 2.

[0123] The difference between Embodiment 2 and Embodiment 1 is that a newly added reduction means is set in the impact range information 34. In Embodiment 2, this difference is described, and the description of the same points is omitted.

[0124] Description of the structure

[0125] Refer to Figure 5 to describe the structure of the emission calculation device 10 of Embodiment 2.

[0126] The emission calculation device 10 includes an impact range setting section 25 as a functional component, which is different from the emission calculation device 10 shown in Figure 1 . The function of the impact range setting section 25 is implemented by software or hardware in the same way as other functional components.

[0127] Description of the operation

[0128] Refer to Figure 6 to describe the processing flow of the emission calculation device 10 of Embodiment 2.

[0129] Figure 6 The process shown is as Figure 2 The process is carried out in accordance with prior preparations.

[0130] (Step S21: New method judgment and processing)

[0131] The scope of influence setting unit 25 determines whether new reduction measures have been added.

[0132] At any time, the user sets a new reduction method. At this time, the new reduction method is associated with any stage. If a new reduction method is added, the influence range setting unit 25 causes the process to proceed to step S22. On the other hand, if no new reduction method is added, the influence range setting unit 25 terminates the process.

[0133] The new reduction methods are treated as objects to be processed in steps S22 and S23 respectively.

[0134] (Step S22: Emissions calculation and processing)

[0135] The emission calculation unit 21 calculates the CO2 emissions for each of the multiple stages when new reduction measures are applied to existing buildings that were designed in the past. That is, the emission calculation unit 21 calculates the CO2 emissions for all stages when new reduction measures are applied.

[0136] The emission calculation unit 21 calculates the CO2 emissions when no new reduction measures are applied to the existing buildings. If the CO2 emissions when no new reduction measures are applied are stored in the storage device 13 or the like, the emission calculation unit 21 can read the stored CO2 emissions.

[0137] Furthermore, the situations where new reduction measures are applied and those where no new reduction measures are applied are, in principle, the same, except for whether or not new reduction measures are applied.

[0138] (Step S23: Setting the scope of influence)

[0139] The scope of impact setting unit 25 calculates the difference between CO2 emissions when the new reduction measure is applied and CO2 emissions when it is not applied for multiple stages other than the stage corresponding to the new reduction measure. The scope of impact setting unit 25 defines the stages where the difference among the multiple stages is greater than or equal to the baseline as the stages that have an impact on CO2 emissions with respect to the new reduction measure.

[0140] Then, the influence range setting unit 25 adds the new reduction method to the influence range information 34. At this time, the influence range setting unit 25 sets a slash for the corresponding stage for the new reduction method, sets the stage where there is influence (〇), and sets the stage where there is no influence (×).

[0141] Effects of Implementation Method 2

[0142] As described above, when a new reduction measure is added, the emission calculation device 10 of Embodiment 2 determines the affected stage and adds it to the impact range information 34. Therefore, even when a new reduction measure is added, the affected stage can be appropriately determined.

[0143] Implementation method 3.

[0144] The difference between Implementation Method 3 and Implementation Methods 1 and 2 is that, regarding the application stage, only the affected equipment is recalculated for the identified equipment. This difference will be explained in Implementation Method 3, while the similarities will be omitted.

[0145] In Embodiment 3, the case where functionality was added in Embodiment 1 will be described. However, functionality may also be added to Embodiment 2.

[0146] Description of the action

[0147] Reference Figure 7 The processing flow of the emission calculation device 10 in Embodiment 3 is explained.

[0148] Processing of steps S31 to S35 Figure 2 The processing of steps S11 to S15 is the same. However, in step S35, the impact determination unit 24 has not yet instructed the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage.

[0149] (Step S36: Apply stage-based judgment processing)

[0150] The impact determination unit 24 determines whether the impact stage determined in step S35 includes the application stage.

[0151] If the impact phase includes an application phase, the impact determination unit 24 causes the process to proceed to step S37. On the other hand, if the impact phase does not include an application phase, the impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact phase, causing the process to return to step S32. Therefore, in step S32, the emission calculation unit 21 recalculates the CO2 emissions using the reduction measures set in step S34.

[0152] (Step S37: Equipment determination process)

[0153] The impact determination unit 24 determines the device that causes the impact of the reduction means set in step S34 as the impact device.

[0154] Specifically, the impact determination unit 24 refers to the impact range information 34 to determine the affected equipment. For example... Figure 8 As shown, the scope of impact information 34 indicates the stage at which each of the multiple reduction measures has an impact on CO2 emissions, and indicates whether or not each device has an impact on the application stage.

[0155] The impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage, returning the process to step S32. At this time, for the operation stage, the impact determination unit 24, based on the designated impact equipment, instructs the emission calculation unit 21 to recalculate the CO2 emissions. Therefore, in step S32, the emission calculation unit 21 recalculates the CO2 emissions using the reduction measures set in step S34. The emission calculation unit 21 recalculates the CO2 emissions for the operation stage based on the impact equipment, thereby recalculating the CO2 emissions for the operation stage.

[0156] Effects of Implementation Method 3

[0157] As described above, the emission calculation device 10 of Embodiment 3 recalculates CO2 emissions only for the affected devices, specifically those affected by the reduction measures during the application phase. Therefore, compared to the structure of Embodiment 1, it is possible to predict CO2 emissions with high accuracy even when reduction measures have been implemented, while minimizing processing time.

[0158] Implementation method 4.

[0159] The difference between Implementation Method 4 and Implementation Methods 1-3 is that the affected area is identified, and CO2 emissions are recalculated only for the identified area. This difference will be explained in Implementation Method 4, while the similarities will be omitted.

[0160] In Embodiment 4, the case where functionality was added in Embodiment 1 will be described. However, functionality may also be added to Embodiments 2 and 3.

[0161] Reference Figure 9 The processing flow of the emission calculation device 10 in Embodiment 4 is explained.

[0162] Processing of steps S41 to S45 Figure 2 The processing of steps S11 to S15 is the same. However, in step S45, the impact determination unit 24 has not yet instructed the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage.

[0163] (Step S46: Region Determination Processing)

[0164] The impact determination unit 24 determines the area affected by the reduction means set in step S44 as the impact area and uses it as the impact device.

[0165] Specifically, the influence determination unit 24 determines the influence area by specifying the area where the reduction measures are introduced. For example, if the influence determination unit 24 determines the floor where the reduction measures are introduced, it determines the floor where the reduction measures are introduced as the influence area.

[0166] The impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage, returning the process to step S42. At this time, the impact determination unit 24, based on the designated impact area, instructs the emission calculation unit 21 to recalculate the CO2 emissions. Therefore, in step S42, the emission calculation unit 21 recalculates the CO2 emissions for the impact area using the reduction measures set in step S44, thereby recalculating the CO2 emissions.

[0167] Effects of Implementation Method 4

[0168] As described above, the emission calculation device 10 of Embodiment 4 determines the area affected by the reduction measures on CO2 emissions and recalculates CO2 emissions only for the affected area. Therefore, compared to the structure of Embodiment 1, it is possible to predict CO2 emissions with high accuracy when reduction measures are implemented while suppressing processing time.

[0169] Implementation method 5.

[0170] The difference between Embodiment 5 and Embodiments 1-4 is that, when the application plan information 32 is changed by reduction means, the modification plan information 33 is changed based on the changed application plan information 32. In Embodiment 4, this difference will be explained, while the similarities will be omitted.

[0171] In Embodiment 5, the case where functions were added in Embodiment 1 will be described. However, functions may also be added to Embodiments 2 through 4.

[0172] Structural description

[0173] Reference Figure 10 The structure of the emission calculation device 10 in Embodiment 5 will be explained.

[0174] The emission calculation device 10 has a modification plan change unit 26 as a functional component, which is consistent with... Figure 1 The emission calculation device 10 shown is different. The function of the modification plan change unit 26 is implemented through software or hardware in the same way as other functional components.

[0175] Description of the action

[0176] Reference Figure 11 The processing flow of the emission calculation device 10 in Implementation Method 5 is explained.

[0177] Processing of steps S51 to S55 Figure 2 The processing of steps S11 to S15 is the same. However, in step S35, the impact determination unit 24 has not yet instructed the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage.

[0178] (Step S56: Apply stage-based judgment processing)

[0179] The influence determination unit 24 determines whether the setting stage corresponding to the reduction means set in step S54 is an application stage.

[0180] If the setting phase is the application phase, the impact determination unit 24 causes the process to proceed to step S37. On the other hand, if the setting phase is not the application phase, the impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact phase, causing the process to return to step S52. Therefore, in step S52, the emission calculation unit 21 recalculates the CO2 emissions using the reduction measures set in step S54.

[0181] (Step S57: Modification plan change processing)

[0182] The Modification Plan Change Department 26 determines the impact of changes to the application phase based on reduction measures on the modification phase, and changes the modification phase plan accordingly. Specifically, sometimes the application plan information 32 changes due to reduction measures. The Modification Plan Change Department 26 determines the changes to the application plan information 32 based on reduction measures, and changes the modification plan information 33, which is the plan for the modification phase, accordingly.

[0183] For example, the renovation plan modification department 26 could consider modifying the service life of each piece of equipment according to the usage plan, and modifying the plan at a frequency corresponding to the service life. The service life of building equipment such as air conditioners, ventilation systems, and lighting fixtures varies according to the usage plan. Specifically, equipment operating 24 hours a day has a short service life, but its service life can be extended by shortening its operating time. Furthermore, equipment with a high frequency of on / off switching or setting changes has a short service life, but its service life can be extended by reducing the frequency of on / off switching or setting changes. If the service life is extended, the frequency of modification can be reduced.

[0184] The impact determination unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the determined impact stage, causing the process to return to step S52. Therefore, in step S52, the emission calculation unit 21 recalculates the CO2 emissions using the reduction measures set in step S54, thereby recalculating the CO2 emissions. At this time, the emission calculation unit 21 recalculates the CO2 emissions based on the revised plan for the modification stage.

[0185] Effects of Implementation Method 5

[0186] As described above, when the operation plan information 32 is changed due to reduction measures, the emission calculation device 10 of Embodiment 5 changes the modification plan information 33 based on the changed operation plan information 32. Therefore, CO2 emissions can be calculated appropriately based on a suitable modification plan.

[0187] The embodiments and variations of this disclosure have been described above. Several of these embodiments and variations may also be combined. Furthermore, any one or more of them may be implemented partially. Moreover, this disclosure is not limited to the above embodiments and variations, and various modifications can be made as needed.

[0188] Label Explanation

[0189] 10 Emissions calculation device, 11 Processor, 12 Memory, 13 Storage, 14 Communication interface, 21 Emissions calculation unit, 211 Construction calculation unit, 212 Operation calculation unit, 213 Retrofit calculation unit, 214 Decommissioning calculation unit, 22 Target determination unit, 23 Means setting unit, 24 Impact determination unit, 25 Impact range setting unit, 26 Retrofit plan modification unit, 31 Design information, 32 Operation plan information, 33 Retrofit plan information, 34 Impact range information.

Claims

1. An emission calculation device, wherein, The emission calculation device includes: The emissions calculation department calculates the CO2 emissions of a target building at multiple stages from construction to demolition. The means setting unit sets a reduction means with a CO2 emission reduction effect in a setting stage that is any one of the plurality of stages. as well as The impact determination unit determines the impact stage on CO2 emissions set by the means setting unit, and this impact stage also includes stages other than the setting stage. The emission calculation unit recalculates CO2 emissions using the reduction measures set by the means setting unit for the impact stage determined by the impact determination unit.

2. The emission calculation device according to claim 1, wherein, The emission calculation device further includes a target determination unit, which determines whether the total CO2 emissions calculated by the emission calculation unit for each of the multiple stages are below a target amount. The means setting unit sets a new reduction means until the target determination unit determines that the total amount is below the target amount.

3. The emission calculation device according to claim 1 or 2, wherein, The impact determination unit, for each of the multiple reduction measures, determines the impact stage of the reduction measure by referring to the impact range information indicating the stage that has an impact on CO2 emissions.

4. The emission calculation device according to claim 3, wherein, When new reduction measures are added, the emission calculation unit calculates the CO2 emissions for each of the various stages of a previously designed building (i.e., a previous building) when the new reduction measures are applied. The emission calculation device also includes an influence range setting unit, which takes the difference between the CO2 emissions when the new reduction method is applied and the CO2 emissions when the new reduction method is not applied as a benchmark in the plurality of stages, and adds the stages that have an impact on CO2 emissions with respect to the new reduction method to the influence range information.

5. The emission calculation device according to any one of claims 1 to 4, wherein, The plurality of stages includes an application stage that utilizes the object building. If the impact determination unit includes the application phase in the impact phase, it determines the device whose reduction means have an impact in the equipment used in the application phase as the impacting device. The emission calculation unit recalculates the CO2 emissions for the affected equipment for the application phase, thereby recalculating the CO2 emissions for the application phase.

6. The emission calculation device according to any one of claims 1 to 5, wherein, The impact determination unit identifies the area within the target building affected by the reduction measures as the impact area. The emission calculation unit recalculates the CO2 emissions of the affected area for the affected stage, thereby recalculating the CO2 emissions for the affected stage.

7. The emission calculation device according to any one of claims 1 to 6, wherein, The multiple stages include an application stage of the object building and a renovation stage of the object building. The emission calculation device further includes a retrofit plan modification unit, which, when the set phase is an operation phase, determines the impact of changes in the operation phase based on the reduction measures on the retrofit phase, and modifies the retrofit phase plan according to the determined impact. If the modification plan change department alters the plan for the modification phase, the emission calculation unit recalculates the CO2 emissions for the modification phase based on the changed plan.

8. A method for calculating emissions, wherein, Computers calculate the CO2 emissions of a building at various stages from construction to demolition. The computer sets reduction measures that have a CO2 emission reduction effect at any of the multiple stages. The computer determines the impact phase of the reduction measures on CO2 emissions, which also includes phases other than the predetermined phase. The computer recalculates CO2 emissions using the reduction measures for the aforementioned impact phase.

9. An emissions calculation program that enables a computer to function as an emissions calculation device, wherein, The emission calculation device performs the following processing: Emissions calculation and processing: Calculate the CO2 emissions of the target building at multiple stages from construction to demolition. The means setting process sets a reduction means with a CO2 emission reduction effect in a setting stage that is any of the multiple stages. as well as The impact determination process identifies the impact stages on CO2 emissions caused by the reduction measures set through the aforementioned methods, including stages other than the set-stage process. In the emission calculation process, for the impact stage determined by the impact determination process, the CO2 emissions are recalculated using the reduction measures set by the means setting process.

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