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

Abstract

The emission calculation unit (21) calculates the CO2 emissions at each of a plurality of stages from the construction to the disposal of the target building. The means setting unit (23) sets reduction means that have a reduction effect on the CO2 emissions at a set stage, which is any one of the plurality of stages. The influence identification unit (24) identifies an influence stage in which the set reduction means affects the CO2 emissions, including stages other than the set stage. The emission calculation unit (21) recalculates the CO2 emissions for the identified influence stage.

Description

Technical Field

[0001] The present disclosure relates to a technique for assisting in formulating a plan to keep the CO2 emissions of a building below a target value.

Background Art

[0002] Definitions of LCCM and ZCB have been established for future carbon neutrality. LCC is an abbreviation for Life-Cycle Carbon Minus. ZCB is an abbreviation for Zero Carbon Building. In LCCM and ZCB, it is defined to make the CO2 balance in the life cycle of a building negative. The CO2 emissions here refer to the amount obtained by subtracting the reduction amount of CO2 emissions from the emission amount of CO2 emissions. The reduction amount is, for example, the amount of CO2 reduced by self-consumption of solar power generation or selling surplus power. The life cycle of a building is from the construction to the demolition of the building, specifically construction, operation, renovation, and demolition. The life cycle of a building may include raw material procurement before construction.

[0003] In order to achieve LCCM and ZCB, it is necessary to formulate a plan to keep the CO2 emissions below the target value. To formulate this plan, it is necessary to predict the CO2 emissions at each stage of the life cycle of the building. Patent Document 1 describes calculating the CO2 emissions at each stage of the life cycle of a building based on the design data of the building.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the registered plan, if the value obtained by subtracting the CO2 reduction amount from the CO2 emission amount does not fall below the target value, the introduction of reduction measures for reducing the CO2 emission amount is incorporated into the plan. Although it is necessary to predict the CO2 emission amount when reduction measures are introduced, recalculating the CO2 emission amount at all stages would require a long processing time. It is also conceivable to recalculate the CO2 emission amount only for the stage where reduction measures are introduced. However, depending on the reduction measures, not only the CO2 emission amount at the introduced stage but also the CO2 emission amounts at other stages are affected. Therefore, if the CO2 emission amount is recalculated only for the stage where reduction measures are introduced, it becomes impossible to predict an appropriate CO2 reduction amount. The present disclosure aims to enable accurate prediction of the CO2 emission amount when reduction measures are introduced while suppressing the processing time.

Means for Solving the Problems

[0006] The emission amount calculation device according to the present disclosure includes an emission amount calculation unit that calculates the CO2 emission amount at each of a plurality of stages from the construction to the disposal of the target building, a means setting unit that sets reduction measures having a CO2 emission reduction effect at a setting stage that is any one of the plurality of stages, and an influence specifying unit that specifies an influence stage in which the reduction measures set by the means setting unit affect the CO2 emission amount, including stages other than the setting stage. The emission amount calculation unit recalculates the CO2 emission amount for the influence stage specified by the influence specifying unit.

Advantages of the Invention

[0007] In the present disclosure, the influence stage in which the reduction measures affect the CO2 emission amount is specified, and the CO2 emission amount is recalculated for the influence stage. Thereby, it is possible to accurately predict the CO2 emission amount when reduction measures are introduced while suppressing the processing time.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0009] Embodiment 1. The emission calculation device 10 for calculating the CO2 emissions of the target building will be described. In Embodiment 1, as the life cycle of the building, it will be described as including four stages: the construction stage, the operation stage, the renovation stage, and the demolition stage. The construction stage is the stage related to the construction of the target building, including the manufacture of the materials of the target building and the construction of the target building. The operation stage is the stage related to the operation of the energy and light, heat, water, etc. of the constructed target building. The renovation stage is the stage related to the renovation such as the repair and replacement of the structure and equipment of the constructed target building. The demolition stage is the stage related to the demolition, removal, and waste treatment of the target building that has ended its operation.

[0010] ***Description of the Configuration*** Referring to FIG. 1, the configuration of the emission amount calculation device 10 according to Embodiment 1 will be described. The emission amount calculation device 10 is a computer. The emission amount calculation device 10 includes hardware such as a processor 11, a memory 12, a storage 13, and a communication interface 14. The processor 11 is connected to other hardware via signal lines and controls these other hardware.

[0011] The processor 11 is an IC that performs processing. IC is an abbreviation for Integrated Circuit. Specific examples of the processor 11 include a CPU, a DSP, and a GPU. CPU is an abbreviation for Central Processing Unit. DSP is an abbreviation for Digital Signal Processor. GPU is an abbreviation for Graphics Processing Unit.

[0012] The memory 12 is a storage device that temporarily stores data. Specific examples of the memory 12 include SRAM and DRAM. SRAM is an abbreviation for Static Random Access Memory. DRAM is an abbreviation for Dynamic Random Access Memory.

[0013] The storage 13 is a storage device that stores data. Specific examples of the storage 13 include an HDD. HDD is an abbreviation for Hard Disk Drive. Further, the storage 13 may be a portable recording medium such as an SD (registered trademark) memory card, a CompactFlash (registered trademark), a NAND flash, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD. SD is an abbreviation for Secure Digital. DVD is an abbreviation for Digital Versatile Disk.

[0014] The communication interface 14 is an interface for communicating with an external device. As a specific example, the communication interface 14 is a port for Ethernet (registered trademark), USB, or HDMI (registered trademark). USB is the abbreviation of Universal Serial Bus. HDMI is the abbreviation of High-Definition Multimedia Interface.

[0015] The emission calculation device 10 includes, as functional components, an emission calculation unit 21, a target determination unit 22, a means setting unit 23, and an influence identification unit 24. The functions of the respective functional components of the emission calculation device 10 are realized by software. The emission calculation unit 21 includes an architectural calculation unit 211, an operation calculation unit 212, a renovation calculation unit 213, and a disposal calculation unit 214. The storage 13 stores a program for realizing the functions of the respective functional components of the emission calculation device 10. This program is read into the memory 12 by the processor 11 and executed by the processor 11. Thereby, the functions of the respective functional components of the emission calculation device 10 are realized.

[0016] The storage 13 stores design information 31, operation plan information 32, renovation plan information 33, and influence range information 34.

[0017] In FIG. 1, only one processor 11 was shown. However, there may be a plurality of processors 11, and a plurality of processors 11 may execute the programs for realizing the respective functions in cooperation.

[0018] ***Description of the operation*** With reference to FIGS. 2 to 4, the operation of the emission calculation device 10 according to Embodiment 1 will be described. The operation procedure of the emission calculation device 10 according to Embodiment 1 corresponds to the emission calculation method according to Embodiment 1. Also, the program for realizing the operation of the emission calculation device 10 according to Embodiment 1 corresponds to the emission calculation program according to Embodiment 1.

[0019] Referring to FIG. 2, the processing flow of the emission calculation device 10 according to Embodiment 1 will be described. (Step S11: Design Information Acquisition Process) The emission calculation unit 21 acquires the design information 31, operation plan information 32, and renovation plan information 33 of the target building. Specifically, the emission calculation unit 21 acquires the design information 31, operation plan information 32, and renovation plan information 33 of the target building input by the user. The user is, for example, the designer of the building. The design information 31 is information including BIM data, CAD data, information indicating the floor area and the number of floors, etc. BIM is the abbreviation of Building Information Modeling. CAD is the abbreviation of Computer-Aided Design. The operation plan information 32 is information defining the operation method of the energy, light, heat, water, and related facilities of the target building. The renovation plan information 33 is information defining the renovation method and renovation timing of each part of the target building.

[0020] (Step S12: Emission Calculation Process) The emission calculation unit 21 calculates the CO2 emissions at each of a plurality of stages from the construction to the disposal of the target building based on the design information 31, operation plan information 32, and renovation plan information 33 acquired in Step S11. Specifically, the building calculation unit 211 calculates the CO2 emissions at the construction stage of the target building based on the design information 31. The operation calculation unit 212 calculates the CO2 emissions at the operation stage of the target building based on the design information 31 and the operation plan information 32. The renovation calculation unit 213 calculates the CO2 emissions at the renovation stage of the target building based on the design information 31 and the renovation plan information 33. The disposal calculation unit 214 calculates the CO2 emissions at the disposal stage of the target building based on the design information 31.

[0021] Here, the CO2 emissions include not only the CO2 emissions generated from the consumption of energy and the like, but also the CO2 emissions reduced through power generation. That is, the CO2 emissions are the amount obtained by subtracting the reduction amount that reduces the CO2 emissions from the emission amount that emits CO2. The reduction amount can be obtained, for example, by introducing solar power generation for power generation.

[0022] (Step S13: Target Judgment Process) The target judgment unit 22 determines whether the total amount of CO2 emissions at each of the plurality of stages calculated in step S22 is less than or equal to the target amount. Specifically, the target judgment unit 22 sums up the CO2 emissions at each stage calculated in step S22 to calculate the total amount. That is, the target judgment unit 22 sums up the CO2 emissions in the construction stage, the CO2 emissions in the operation stage, the CO2 emissions in the renovation stage, and the CO2 emissions in the disposal stage to calculate the total amount. The target judgment unit 22 determines whether the total amount is less than or equal to the target amount. The target amount is a value set in advance. For example, if the purpose is to achieve LCCM and ZCB, the target amount is 0. If the total amount is less than or equal to the target amount, the target judgment unit 22 presents the reduction means set so far in step S14 described later and ends the process. On the other hand, if the total amount is more than the target amount, the target judgment unit 22 advances the process to step S14.

[0023] (Step S14: Means Setting Process) The means setting unit 23 sets a reduction means that has an effect of reducing CO2 emissions at the set stage, which is any one of the plurality of stages. Specifically, as shown in FIG. 3, the means setting unit 23 sets one reduction means to be used from among the plurality of reduction means prepared for each stage. For example, the means setting unit 23 sets the reduction means designated by the user.

[0024] (Step S15: Influence Identification Process) The impact specific part 24 specifies an impact stage at which the reduction means set in step S14 affects the CO2 emission amount. Here, the impact specific part 24 specifies an impact stage including stages other than the setting stage corresponding to the reduction means set in step S14. Specifically, the impact specific part 24 refers to the impact range information 34 to specify the impact stage. As shown in FIG. 4, the impact range information 34 shows the stages at which each of a plurality of reduction means affects the CO2 emission amount. In FIG. 4, for the setting stage which is the stage corresponding to the reduction means, since there is naturally a reduction effect on the CO2 emission amount, it is hatched. For stages other than the setting stage, "impact (〇)" and "no impact (×)" are set. "Impact" means that the CO2 emission amount increases or decreases.

[0025] Specific examples of the impact on the CO2 emission amount other than the setting stage are as follows. (1) In the construction stage, when the material is changed from steel frame to wood, the heat insulation property changes. This affects the CO2 emission amount in the operation stage. (2) In the operation stage, when the operation time of the equipment is changed, the service life of the equipment changes. This affects the CO2 emission amount in the renovation stage. (3) In the renovation stage, the renovation cycle is extended from 10 years to 13 years. In this case, the CO2 emission amount in the renovation stage is reduced. However, old equipment will operate from 11 years to 13 years after installation, which affects the CO2 emission amount in the operation stage.

[0026] The impact specific part 24 instructs the emission amount calculation part 21 to recalculate the CO2 emission amount for the specified impact stage, and returns the process to step S12. Then, in step S12, the emission amount calculation part 21 recalculates the CO2 emission amount using the reduction means set in step S14.

[0027] In this way, reduction measures are added until the total amount of CO2 emissions in each of the multiple stages is equal to or less than the target amount. As a result, the plan for each stage is gradually improved, and finally a plan is derived in which the total amount of CO2 emissions is equal to or less than the target amount.

[0028] The calculation method of the CO2 emissions in each stage in step S12 of FIG. 2 will be described. (Construction stage) The emission calculation unit 21 calculates the CO2 emissions for each building material such as concrete and steel. First, the emission calculation unit 21 calculates the amount of each building material from the design information 31. Then, the emission calculation unit 21 multiplies the calculated amount of each building material by the CO2 conversion factor to calculate the CO2 emissions for that building material. In addition, the emission calculation unit 21 calculates the CO2 emissions associated with the transportation of each building material. The emission calculation unit 21 multiplies the value obtained by multiplying the transportation amount by the transportation distance of each building material by the CO2 conversion factor to calculate the CO2 emissions associated with the transportation of that building material. Note that the emission calculation unit 21 specifies the distance from the production location to the construction site as the transportation distance when the production location of each building material can be specified. The emission calculation unit 21 may use a predetermined distance as the transportation distance when the production location cannot be specified. The emission calculation unit 21 calculates the CO2 emissions in the construction stage by summing the CO2 emissions for each building material and the CO2 emissions associated with the transportation of each building material. It is conceivable to use the information set in the emission factor database as the CO2 conversion factor.

[0029] (Operation stage) The discharge amount calculation unit 21 acquires the floor plan, area, heat insulation properties of walls and windows, and the capacity of equipment installed in each room, etc. from the design information 31. In addition, the discharge amount calculation unit 21 acquires information on the average annual climate of the region where the target building is located from a server such as the Japan Meteorological Agency. The discharge amount calculation unit 21 estimates the annual energy consumption of each piece of equipment when operating according to the plan indicated by the operation plan information 32 using the acquired information. Each piece of equipment is an air conditioner, a ventilation device, a lighting device, a water heater, an elevator, etc. For estimating the energy consumption, it is conceivable to use a simulator that reproduces the digital twin of the building and estimates the energy consumption of each piece of equipment. The discharge amount calculation unit 21 calculates the energy consumption from the time the target building is constructed until it is demolished from the estimated annual energy consumption. The period from when the target building is constructed until it is demolished is, for example, a period of 50 years. The discharge amount calculation unit 21 may calculate the energy consumption for that period by multiplying the annual energy consumption by the number of years of the period from when the target building is constructed until it is demolished. Also, for each year since construction, the energy consumption for that year may be calculated by multiplying the annual energy consumption by a coefficient considering the deterioration of each piece of equipment, and the calculated energy consumptions may be summed up to calculate the energy consumption for that period. The discharge amount calculation unit 21 calculates the CO2 emission amount by multiplying the energy consumption from the time the target building is constructed until it is demolished by the CO2 conversion coefficient. It is conceivable to use a value corresponding to the power company with which the target building has a contract as the CO2 conversion coefficient.

[0030] In the operation stage, there may be means for reducing the CO2 emission amount. For example, there may be a possibility that a solar power generation facility is installed in the target building. When a solar power generation facility is installed, the discharge amount calculation unit 21 acquires the capacity, installation location, installation enclosure, and installation angle of the solar power generation facility from the design information 31. In addition, the discharge amount calculation unit 21 acquires the average annual solar radiation amount and solar radiation time of the region where the target building is located from a server such as the Japan Meteorological Agency. The discharge amount calculation unit 21 estimates the generated energy using the acquired information. The discharge amount calculation unit 21 calculates the CO2 reduction amount by multiplying the estimated generated energy by the CO2 conversion coefficient. Then, the emission calculation unit 21 subtracts the reduction amount from the above-described CO2 emissions to calculate the CO2 emissions during the operation stage.

[0031] (Renovation stage) The emission calculation unit 21 identifies the number of updated building materials and equipment and the number of update times from the renovation plan information 33. For each building material and equipment, the renovation plan information 33 sets the update timing based on the service life and the like. The emission calculation unit 21 multiplies the value obtained by multiplying the number of updated items by the number of update times for each building material and equipment by the CO2 conversion coefficient to calculate the CO2 emissions. The emission calculation unit 21 sums up the CO2 emissions calculated for each building material and equipment to calculate the CO2 emissions during the renovation stage. Note that the CO2 conversion coefficient can be obtained from the emission intensity database used in the construction stage.

[0032] (Disposal stage) The emission calculation unit 21 calculates the floor area and the amount of waste of the target building from the design information 31. The emission calculation unit 21 multiplies the floor area and the amount of waste by the CO2 conversion coefficients for demolition and landfill to calculate the CO2 conversion coefficient during the disposal stage. Note that the CO2 conversion coefficient can be the information set in the emission intensity database used for calculating the CO2 emissions in the construction stage.

[0033] Note that in each stage, in addition to the CO2 emissions, the cost may also be calculated. By showing the calculated cost to the user, it becomes easier to select reduction measures considering the cost. The calculation method of the cost for each stage will be described.

[0034] (Construction stage) The emission calculation unit 21 calculates the cost for each building material and equipment. First, the emission calculation unit 21 calculates the amount of each building material and equipment from the design information 31. Then, the emission calculation unit 21 multiplies the calculated amount for each building material and equipment by the unit price to calculate the cost for that building material or equipment. The discharge amount calculation unit 21 calculates the costs associated with transporting each building material and each facility. The discharge amount calculation unit 21 calculates the number of trucks from the transport volume for each building material and each facility. The discharge amount calculation unit 21 multiplies the number of trucks by the transport distance and then multiplies by the transport unit price (gasoline cost + labor cost) to calculate the cost of transportation. The discharge amount calculation unit 21 calculates the cost (labor cost) associated with the construction work. The discharge amount calculation unit 21 calculates the floor area of the target building from the design information 31. The discharge amount calculation unit 21 multiplies the floor area by the work unit price (yen / m 2 ) to calculate the cost incurred during the work. The discharge amount calculation unit 21 calculates the cost of construction in the construction stage by summing up the costs for each building material and each facility, the costs associated with transporting each building material and each facility, and the costs associated with the construction work.

[0035] (Operation stage) The discharge amount calculation unit 21 calculates the purchased electricity energy and the sold electricity energy for one year from the consumed energy and the generated energy for one year. The discharge amount calculation unit 21 calculates the contract power (kW) and the consumed electricity volume (kWh) from the purchased electricity energy for one year, and multiplies each by the basic charge (yen / kW) and the electricity volume charge (yen / kWh) respectively to calculate the cost of purchasing electricity. Also, the discharge amount calculation unit 21 multiplies the sold electricity energy for one year by the selling electricity price (yen / kWh) to calculate the cost of selling electricity. The cost of purchasing electricity and selling electricity is added together to calculate the cost in the operation stage.

[0036] (Renovation stage) The discharge amount calculation unit 21 identifies the number of updated items and the number of update times for each building material and each facility from the renovation plan information 33. For each building material and each facility, the discharge amount calculation unit 21 multiplies the value obtained by multiplying the number of updated items by the number of update times by the unit price to calculate the cost for that building material or facility. Also, the discharge amount calculation unit 21 calculates the cost of transportation and the cost of work in the same way as in the construction stage. Then, the discharge amount calculation unit 21 calculates the cost in the renovation stage by summing up the costs for each building material and each facility, the costs associated with transporting each building material and each facility, and the costs associated with the work.

[0037] (Disposal stage) The discharge amount calculation unit 21 calculates the floor area and the amount of waste of the target building from the design information 31. The discharge amount calculation unit 21 multiplies the floor area and the amount of waste by the unit price to calculate the cost at the disposal stage.

[0038] Explain the method of selecting reduction means in step S14 of FIG. 2. As described above, the user may be allowed to select any reduction means. However, the means setting unit 23 may preferentially select the reduction means extracted by any one of the following (Method 1) to (Method 3). For example, the means setting unit 23 may display the reduction means extracted by any one of the following (Method 1) to (Method 3) and allow the user to select the reduction means to be set. Further, the means setting unit 23 may set any reduction means among the reduction means extracted by any one of the following (Method 1) to (Method 3).

[0039] (Method 1) The means setting unit 23 extracts reduction means such that the processing time required for recalculating the CO2 emission amount is shortened. The reduction means such that the processing time required for recalculating the CO2 emission amount is shortened are reduction means that have no or few affected stages. For example, the means setting unit 23 extracts the reduction means with the fewest affected stages.

[0040] (Method 2) The means setting unit 23 extracts reduction means with a large reduction amount of CO2 emissions. Specifically, in the list of reduction means shown in FIG. 3, reference values of the reduction amounts of CO2 emissions for each reduction means are held. The means setting unit 23 refers to this reference value and extracts the reduction means with the largest reduction amount, the reference number of reduction means from the ones with a large reduction amount, or all reduction means with a reduction amount greater than the reference amount. The reference value of the reduction amount of CO2 emissions is calculated by averaging the trial calculation results of the reduction amounts for a plurality of buildings designed in the past with respect to the floor area and the like. By preferentially selecting reduction measures with large reduction amounts, the total amount can be made below the target amount with fewer reduction measures. As a result, the processing time required for recalculating the CO2 emissions can be shortened.

[0041] (Method 3) The means setting unit 23 extracts reduction means with low costs. Specifically, in the list of reduction means shown in FIG. 3, reference values of costs for each reduction means are held. The means setting unit 23 refers to this reference value and extracts the reduction means with the lowest cost, the reference number of reduction means from the ones with lower costs, or all reduction means whose costs are less than the reference value. The reference value of the cost is calculated by averaging the cost estimation results for a plurality of buildings designed in the past with respect to the floor area or the like.

[0042] ***Effect of Embodiment 1*** As described above, the emission amount calculation device 10 according to Embodiment 1 specifies the influence stage in which the reduction means affects the CO2 emission amount, and recalculates the CO2 emission amount only for the influence stage. Thereby, it is possible to accurately predict the CO2 emission amount when the reduction means is introduced while suppressing the processing time.

[0043] ***Other Configurations***

[0044] <Modification Example 1> In Embodiment 1, each functional component is realized by software. However, as Modification Example 1, each functional component may be realized by hardware. Regarding this Modification Example 1, differences from Embodiment 1 will be described.

[0045] When each functional component is realized by hardware, the emission amount calculation device 10 includes an electronic circuit instead of the processor 11, the memory 12, and the storage 13. The electronic circuit is a dedicated circuit that realizes the functions of each functional component, the memory 12, and the storage 13.

[0046] As the electronic circuit, a single circuit, a composite circuit, a programmed processor, a parallel-programmed processor, a logic IC, a GA, an ASIC, and an FPGA are assumed. GA is the abbreviation of Gate Array. ASIC is the abbreviation of Application Specific Integrated Circuit. FPGA is the abbreviation of Field-Programmable Gate Array. Each functional component may be realized by one electronic circuit, or each functional component may be realized by being distributed to a plurality of electronic circuits.

[0047] <Modification Example 2> As Modification Example 2, some of each functional component may be realized by hardware and the other each functional component may be realized by software.

[0048] 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 realized by the processing circuit.

[0049] Further, the "section" in the above description may be read as "circuit", "step", "procedure", "process", or "processing circuit".

[0050] Embodiment 2. Embodiment 2 is different from Embodiment 1 in that the reduction means newly added is set in the influence range information 34. In Embodiment 2, this different point will be described, and the description of the same point will be omitted.

[0051] ***Description of Configuration*** With reference to FIG. 5, the configuration of the emission amount calculation device 10 according to Embodiment 2 will be described. The emission amount calculation device 10 is different from the emission amount calculation device 10 shown in FIG. 1 in that it includes an influence range setting unit 25 as a functional component. The function of the influence range setting unit 25 is realized by software or hardware in the same manner as other functional components.

[0052] ***Description of Operation*** Referring to FIG. 6, the processing flow of the emission calculation device 10 according to Embodiment 2 will be described. The processing shown in FIG. 6 is executed as a preparation before the processing shown in FIG. 2. (Step S21: New means determination process) The influence range setting unit 25 determines whether a new reduction means has been added. A new reduction means is set by the user at an arbitrary timing. At this time, the new reduction means is associated with any stage. If a new reduction means is added, the influence range setting unit 25 advances the process to step S22. On the other hand, if no new reduction means is added, the influence range setting unit 25 ends the process.

[0053] The processes of step S22 and step S23 are executed for each new reduction means.

[0054] (Step S22: Emission calculation process) The emission calculation unit 21 calculates the CO2 emissions at each of a plurality of stages when the target new reduction means is applied to a past building that was designed in the past. That is, the emission calculation unit 21 calculates the CO2 emissions when the target new reduction means is applied for all stages. The emission calculation unit 21 calculates the CO2 emissions when the target new reduction means is not applied to the past building. If the CO2 emissions when the target new reduction means is not applied are stored in the storage 13 or the like, the emission calculation unit 21 may read out the stored CO2 emissions. Note that, in principle, the case where the new reduction means is applied and the case where the target new reduction means is not applied are the same except for the application or non-application of the new reduction means.

[0055] (Step S23: Influence range setting process) For each of a plurality of stages other than the stage to which the target new reduction measure corresponds, the influence range setting unit 25 calculates the difference between the CO2 emissions when the target new reduction measure is applied and the CO2 emissions when the new reduction measure is not applied. The influence range setting unit 25 identifies, as the stages affected by the CO2 emissions of the new reduction measure, the stages among the plurality of stages where the difference is equal to or greater than the reference. Then, the influence range setting unit 25 adds the new reduction measure to the influence range information 34. At this time, for the new reduction measure, the influence range setting unit 25 sets a diagonal line for the corresponding stage, sets "affected (〇)" for the identified stage, and sets "not affected (×)" for the remaining stages.

[0056] ***Effects of Embodiment 2*** As described above, when a new reduction measure is added, the emission amount calculation device 10 according to Embodiment 2 identifies the affected stages and adds them to the influence range information 34. This makes it possible to appropriately identify the affected stages even when a new reduction measure is added.

[0057] Embodiment 3. Regarding the operation stage, Embodiment 3 is different from Embodiments 1 and 2 in that it identifies the equipment affected and recalculates the CO2 emissions only for the identified equipment. Embodiment 3 will explain this difference and omit the explanation for the same points. In Embodiment 3, the case where functions are added to Embodiment 1 will be described. However, it is also possible to add functions to Embodiment 2.

[0058] ***Explanation of Operations*** With reference to FIG. 7, the processing flow of the emission amount calculation device 10 according to Embodiment 3 will be described. The processing from step S31 to step S35 is the same as the processing from step S11 to step S15 in FIG. 2. However, in step S35, the influence identification unit 24 does not instruct the emission amount calculation unit 21 to recalculate the CO2 emissions for the yet-to-be-identified affected stages.

[0059] (Step S36: Operation Stage Determination Process) The impact identification unit 24 determines whether the operation stage is included in the impact stage specified in step S35. If the operation stage is included in the impact stage, the impact identification unit 24 proceeds with the process to step S37. On the other hand, if the operation stage is not included in the impact stage, the impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the specified impact stage and returns the process to step S32. Then, in step S32, the emission calculation unit 21 recalculates the CO2 emissions using the reduction means set in step S34.

[0060] (Step S37: Facility Identification Process) The impact identification unit 24 identifies the facility affected by the reduction means set in step S34 as the impact facility. Specifically, the impact identification unit 24 refers to the impact range information 34 to identify the impact facility. As shown in FIG. 8, the impact range information 34 indicates the stage that affects the CO2 emissions for each of the plurality of reduction means and also indicates the presence or absence of an impact on each facility for the operation stage.

[0061] The impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the specified impact stage and returns the process to step S32. At this time, for the operation stage, the impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions after designating the impact facility. Then, in step S32, the emission calculation unit 21 recalculates the CO2 emissions using the reduction means set in step S34. By recalculating the CO2 emissions for the impact facility for the operation stage, the emission calculation unit 21 recalculates the CO2 emissions for the operation stage.

[0062] ***Effects of Embodiment 3*** As described above, for the operation stage, the emission calculation device 10 according to Embodiment 3 identifies the affected facilities where the reduction means affects the CO2 emissions, and recalculates the CO2 emissions only for the affected facilities. Thereby, when the reduction means is introduced, it is possible to accurately predict the CO2 emissions with a shorter processing time than the configuration of Embodiment 1.

[0063] Embodiment 4. Embodiment 4 is different from Embodiments 1 to 3 in that it identifies the area where there is an impact and recalculates the CO2 emissions only for the identified area. In Embodiment 4, this difference will be described, and the description of the same points will be omitted. In Embodiment 4, the case where functions are added to Embodiment 1 will be described. However, it is also possible to add functions to Embodiments 2 and 3.

[0064] Referring to FIG. 9, the processing flow of the emission calculation device 10 according to Embodiment 4 will be described. The processing from step S41 to step S45 is the same as the processing from step S11 to step S15 in FIG. 2. However, in step S45, the impact identification unit 24 does not instruct the emission calculation unit 21 to recalculate the CO2 emissions for the impact stage that has not yet been identified.

[0065] (Step S46: Area identification process) The impact identification unit 24 identifies the area affected by the reduction means set in step S44 as the impact area and as the affected facility. Specifically, the impact identification unit 24 identifies the impact area, for example, by designating the area where the reduction means is to be introduced. For example, when the floor where the reduction means is to be introduced is determined, the impact identification unit 24 identifies the floor where the reduction means is to be introduced as the impact area.

[0066] The impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the identified impact stage, and returns the process to step S42. At this time, the impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions after designating the impact area. Then, in step S42, the emission calculation unit 21 recalculates the CO2 emissions by recalculating the CO2 emissions of the impact area using the reduction means set in step S44.

[0067] ***Effects of Embodiment 4*** As described above, the emission calculation device 10 according to Embodiment 4 identifies the impact area where the reduction means affects the CO2 emissions, and recalculates the CO2 emissions only for the impact area. Thereby, it is possible to accurately predict the CO2 emissions when the reduction means is introduced with higher accuracy while suppressing the processing time compared to the configuration of Embodiment 1.

[0068] Embodiment 5. Embodiment 5 is different from Embodiments 1 to 4 in that when the operation plan information 32 is changed by the reduction means, the renovation plan information 33 is changed based on the changed operation plan information 32. In Embodiment 4, this different point will be described, and the description of the same points will be omitted. In Embodiment 5, the case where functions are added to Embodiment 1 will be described. However, it is also possible to add functions to Embodiments 2 to 4.

[0069] ***Description of Configuration*** Referring to FIG. 10, the configuration of the emission calculation device 10 according to Embodiment 5 will be described. The emission calculation device 10 is different from the emission calculation device 10 shown in FIG. 1 in that it includes a renovation plan change unit 26 as a functional component. The function of the renovation plan change unit 26 is realized by software or hardware, like other functional components.

[0070] ***Description of Operation*** Referring to FIG. 11, the processing flow of the emission calculation device 10 according to Embodiment 5 will be described. The processing from step S51 to step S55 is the same as the processing from step S11 to step S15 in FIG. 2. However, in step S35, the impact identification unit 24 does not instruct the emission calculation unit 21 to recalculate the CO2 emissions for the identified impact stage.

[0071] (Step S56: Operation stage determination process) The impact identification unit 24 determines whether the setting stage corresponding to the reduction means set in step S54 is the operation stage. If the setting stage is the operation stage, the impact identification unit 24 advances the process to step S37. On the other hand, if the setting stage is not the operation stage, the impact identification unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the identified impact stage and returns the process to step S52. Then, in step S52, the emission calculation unit 21 recalculates the CO2 emissions using the reduction means set in step S54.

[0072] (Step S57: Retrofit plan change process) The retrofit plan change unit 26 identifies the impact of the change in the operation stage by the reduction means on the retrofit stage and changes the retrofit stage plan according to the identified impact. Specifically, the operation plan information 32 may be changed by the reduction means. The retrofit plan change unit 26 identifies the change content of the operation plan information 32 by the reduction means and changes the retrofit plan information 33, which is the plan for the retrofit stage, according to the identified change content. For example, the retrofit plan change unit 26 may change the service life of each facility according to the operation plan and change the retrofit plan so that retrofits are performed at a frequency according to the service life. The service life of the facilities in a building such as an air conditioner, a ventilation device, and a lighting device changes according to the operation plan. As a specific example, facilities that operate 24 hours a day have a short service life, but the service life can be extended by shortening the operation time. Also, facilities with a high frequency of on / off switching or setting changes have a short service life, but the 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 performing retrofits can be reduced.

[0073] The impact specifying unit 24 instructs the emission calculation unit 21 to recalculate the CO2 emissions for the specified impact stage and returns the process to step S52. Then, in step S52, the emission calculation unit 21 recalculates the CO2 emissions by recalculating the CO2 emissions using the reduction means set in step S54. At this time, for the renovation stage, the emission calculation unit 21 recalculates the CO2 emissions based on the changed plan.

[0074] ***Effects of Embodiment 5*** As described above, when the operation plan information 32 is changed by the reduction means, the emission calculation device 10 according to Embodiment 5 changes the renovation plan information 33 based on the changed operation plan information 32. As a result, the CO2 emissions are calculated based on an appropriate renovation plan, and the CO2 emissions can be calculated appropriately.

[0075] The embodiments and modification examples of the present disclosure have been described above. Some of these embodiments and modification examples may be combined and implemented. Also, any one or some of them may be implemented partially. Note that the present disclosure is not limited to the above embodiments and modification examples, and various changes can be made as needed.

Explanation of Reference Numerals

[0076] 10 Emission calculation device, 11 Processor, 12 Memory, 13 Storage, 14 Communication interface, 21 Emission calculation unit, 211 Building calculation unit, 212 Operation calculation unit, 213 Renovation calculation unit, 214 Disposal calculation unit, 22 Target determination unit, 23 Means setting unit, 24 Impact specifying unit, 25 Impact range setting unit, 26 Renovation plan change unit, 31 Design information, 32 Operation plan information, 33 Renovation plan information, 34 Impact range information.

Claims

1. an emission calculation unit that calculates CO2 emissions in each of a plurality of stages from construction to disposal of the target building; a means setting unit that sets a reduction means having a CO2 emission reduction effect at a setting stage that is one of the plurality of stages; an impact identification unit that identifies an impact stage in which the reduction means set by the means setting unit affects CO2 emissions, including impact stages other than the set stage; Equipped with The emission calculation unit recalculates CO2 emissions for the impact stage identified by the impact identification unit using the reduction means set by the means setting unit.

2. The emission calculation device further comprises: a target determination unit that determines whether the total amount of CO2 emissions in each of the plurality of stages calculated by the emission calculation unit is equal to or less than a target amount; Equipped with The means setting unit sets a new reduction means until the target determination unit determines that the total amount is equal to or less than the target amount. The emission calculation device according to claim 1 .

3. The impact identification unit refers to impact range information indicating a stage of impact on CO2 emissions for each of a plurality of reduction measures, and identifies the impact stage for the reduction measure. The emission calculation device according to claim 1 .

4. when a new reduction measure is added, the emission calculation unit calculates CO2 emissions at each of the plurality of stages for a past building that is a building designed in the past when the new reduction measure is applied to the past building, The emission calculation device further comprises: an impact range setting unit that adds, among the plurality of stages, a stage where the difference between the CO2 emissions when the new reduction measure is applied and the CO2 emissions when the new reduction measure is not applied is equal to or greater than a standard, as a stage where the new reduction measure has an impact on the CO2 emissions, to the impact range information; The emission calculation device according to claim 3 , comprising:

5. The plurality of stages includes an operation stage of operating the target building, When the operation stage is included in the impact stage, the impact identification unit identifies, among the facilities used in the operation stage, facilities that are affected by the reduction means as impact facilities; The emission calculation unit recalculates the CO2 emission amount for the operation stage by recalculating the CO2 emission amount for the affected equipment for the operation stage. The emission calculation device according to claim 1 .

6. the impact identification unit identifies an area in the target building that will be affected by the reduction means as an impact area; The emission calculation unit recalculates the CO2 emission amount for the influence stage by recalculating the CO2 emission amount for the influence area for the influence stage. The emission calculation device according to claim 1 .

7. The plurality of stages includes an operation stage for operating the target building and a renovation stage for renovating the target building; The emission calculation device further comprises: a modification plan change unit that, when the setting stage is an operation stage, identifies an impact that a change to the operation stage by the reduction means will have on the modification stage, and changes a plan for the modification stage in accordance with the identified impact; Equipped with When the plan for the renovation stage is changed by the renovation plan change unit, the emission calculation unit recalculates the CO2 emission amount for the renovation stage based on the changed plan. The emission calculation device according to claim 1 .

8. The computer calculates the CO2 emissions for each of the multiple stages from construction to disposal of the target building, The computer sets a reduction means having a CO2 emission reduction effect at a setting stage which is one of the plurality of stages, The computer identifies an impact stage in which the reduction means affects CO2 emissions, including impact stages other than the setting stage; An emissions calculation method in which a computer recalculates CO2 emissions for the impact stage using the reduction means.

9. An emission calculation process for calculating CO2 emissions at each of multiple stages from construction to disposal of the target building; a means setting process for setting a reduction means having a CO2 emission reduction effect at a setting stage that is one of the plurality of stages; an impact identification process for identifying an impact stage in which the reduction means set by the means setting process affects CO2 emissions, including impact stages other than the setting stage; The computer functions as an emission calculation device that performs the following: In the emission calculation process, the emission calculation program recalculates CO2 emissions for the impact stage identified in the impact identification process using the reduction means set in the means setting process.

Images