GHG emission amount calculation device and GHG emission amount calculation method
The GHG emission calculation device and method address the challenge of inaccurate hydrogen transportation emissions by integrating real-time energy consumption and equipment-related emissions into hydrogen ID calculations, providing precise data for hydrogen sorting and route selection.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- KAWASAKI JUKOGYO KK
- Filing Date
- 2025-10-15
- Publication Date
- 2026-04-23
AI Technical Summary
Existing methods fail to accurately calculate greenhouse gas (GHG) emissions associated with hydrogen transportation, particularly at hydrogen compressors, which are significant sources of energy consumption and emissions.
A GHG emission calculation device and method that acquires hydrogen identification codes and associated emissions, calculates GHG emissions from energy consumption at hydrogen compressors, and adds these emissions to the hydrogen ID, incorporating real-time measurements and emissions from equipment manufacture, maintenance, and non-operating activities.
Provides accurate, moment-by-moment GHG emission calculations for hydrogen transportation, offering objective indicators for hydrogen sorting and route selection, enhancing transparency and efficiency in hydrogen supply chains.
Smart Images
Figure JP2025036276_23042026_PF_FP_ABST
Abstract
Description
GHG emission calculation device and GHG emission calculation method
[0001] This disclosure relates to a GHG emission calculation device and a GHG emission calculation method.
[0002] Patent Document 1 proposes an evaluation system that can evaluate the amount of environmentally harmful substances emitted from fuel in a fuel supply facility that supplies fuel that has been temporarily stored to consumers.
[0003] Japanese Patent Publication No. 2008-243110
[0004] This disclosure aims to provide, as an example, a GHG emission calculation device and a GHG emission calculation method that can be associated with the identification code of hydrogen in a hydrogen transport route and calculate GHG emissions that change moment by moment at a hydrogen compressor more appropriately than conventional methods.
[0005] To solve the above problems, a GHG emission calculation device according to one aspect of the present disclosure is a device for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, comprising: an acquirer that acquires an identification code of hydrogen transported from a hydrogen supply source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the identification code of hydrogen; and a processing circuit that calculates a first GHG emission due to the consumption of a first energy from the energy consumed at the facility by the hydrogen compressor, and adds the first GHG emission to the GHG emissions associated with the identification code of hydrogen.
[0006] Furthermore, a method for calculating GHG emissions according to one aspect of the present disclosure is a method for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, the method comprising: obtaining the identification code of hydrogen transported from a hydrogen source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the identification code of hydrogen; calculating a first GHG emission due to the consumption of a first energy from the energy consumed at the facility by the hydrogen compressor; and adding the first GHG emission to the GHG emissions associated with the identification code of hydrogen.
[0007] The GHG emission calculation device and GHG emission calculation method disclosed herein are associated with the identification code of hydrogen in the hydrogen transport route, and have the effect of being able to calculate GHG emissions that change moment by moment at the hydrogen compressor more appropriately than before.
[0008] Figure 1 is a diagram showing an example of an overall system equipped with a GHG emission calculation device of the first embodiment. Figure 2 is a diagram showing an example of a GHG emission calculation device of the first embodiment. Figure 3 is a flowchart showing an example of the operation (GHG emission calculation method) of the GHG emission calculation device of the first embodiment. Figure 4 is a diagram showing an example of a GHG emission calculation device in an embodiment of the first embodiment. Figure 5 is a diagram illustrating an example of the processing content of a processing circuit in a GHG emission calculation device of the second embodiment. Figure 6 is a diagram illustrating an example of the processing content of a processing circuit in a modified GHG emission calculation device of the second embodiment. Figure 7 is a diagram showing an example of a GHG emission calculation device of the third embodiment. Figure 8 is a diagram illustrating an example of the processing content of a processing circuit in a GHG emission calculation device of the third embodiment.
[0009] In response to the recent trend towards decarbonization, the use of non-fossil energy sources such as hydrogen is progressing. However, fossil energy may still be used at various stages, such as hydrogen production and hydrogen transportation. As a result, greenhouse gases (GHGs) may be emitted at each of these stages.
[0010] In general, the energy sources required for hydrogen production are often identified, so it is possible to determine the GHG emissions resulting from hydrogen production.
[0011] When producing hydrogen, carbon dioxide (CO2), which is an example of a GHG, is used. ２ It is generally known that there are two types of hydrogen: hydrogen that is released into the atmosphere as CO2 and hydrogen that is not. An example of the former is hydrogen produced from fossil fuels such as natural gas in a reformer. An example of the latter is CO2 generated by the reforming reaction of fossil fuels. ２Examples include hydrogen processed using underground storage methods, or hydrogen produced in water electrolysis devices using renewable energy such as solar or wind power. Therefore, at the hydrogen production stage, it is possible to estimate the GHG emissions caused by hydrogen production by understanding the proportion of each of the above types of hydrogen produced.
[0012] In contrast, the energy sources required to transport hydrogen via hydrogen transport routes have not been accurately determined. Furthermore, the more energy consumed in hydrogen transport, the greater the potential for GHG emissions resulting from hydrogen transport, and a considerable amount of energy is consumed in hydrogen compressors along the hydrogen transport route.
[0013] Therefore, after careful consideration, the Disclosers have found that GHG emissions resulting from the energy consumed by the hydrogen compressor for its hydrogen compression operation are valuable data from the perspective of providing hydrogen consumers and hydrogen transporters with accurate information on GHG emissions attributable to hydrogen transport, objective indicators regarding hydrogen sorting managed for each hydrogen identification code, and appropriate information regarding the selection of hydrogen transport routes. This led them to conceive of the above-described aspects of this disclosure.
[0014] The following describes specific examples of each of the above embodiments of this disclosure with reference to the attached drawings. The specific examples described below are all examples of each of the above embodiments of this disclosure. Therefore, the shapes, numerical values, components, arrangement positions of components, and connection configurations shown below do not limit the scope of the claims unless they are described in the claims.
[0015] Furthermore, among the components described below, those not described in the independent claim representing the highest-level concept of this disclosure will be described as optional components. Also, in the drawings, components with the same reference numeral may not be described. The drawings are schematic representations of each component for ease of understanding, and the shape and dimensional ratios may not be accurately represented.
[0016] Furthermore, in the operation of the apparatus, the order of the processes may be changed or known processes may be added as needed. The "hydrogen transport route" can, for example, be composed of a hydrogen pipeline, but is not limited thereto. Also, the "hydrogen compressor" is not necessarily limited to a compression device that compresses hydrogen flowing through a hydrogen pipeline. For example, the process of transporting hydrogen by ship, truck, etc., may constitute part of the "hydrogen transport route." In the following embodiment, the case where the "hydrogen transport route" is composed of a hydrogen pipeline will be described.
[0017] (First Embodiment) [Device Configuration] Figure 1 is a diagram showing an example of an overall system equipped with the GHG emission calculation device of the first embodiment. Figure 2 is a diagram showing an example of the GHG emission calculation device of the first embodiment.
[0018] The overall system shown in Figure 1 comprises a facility 100 and a GHG emission calculation device 50.
[0019] Here, facility 100 includes a hydrogen pipeline 10, which comprises an introduction pipeline 10A and an exhaust pipeline 10B, and at least one hydrogen compressor 11.
[0020] In the example shown in Figure 1, hydrogen transported from a hydrogen supply source through an introduction pipeline 10A to a hydrogen compressor 11 is pressurized to a desired pressure by the hydrogen compressor 11. The compressed hydrogen then discharged from the hydrogen compressor 11 flows through an exhaust pipeline 10B. Such a hydrogen compressor 11 is a device that compresses hydrogen to high pressure for storage or transport by consuming energy such as electricity or fuel, and has been conventionally used for various applications. The configuration of the hydrogen compressor 11 itself is well known, so a detailed explanation is omitted.
[0021] A hydrogen supply source may include, for example, a hydrogen generator and a hydrogen storage device. The hydrogen generator may be a reformer that produces hydrogen from fossil fuels such as natural gas, or a water electrolysis device that produces hydrogen by electrolyzing water using renewable energy such as solar or wind power, but is not limited to these. A hydrogen storage device may be, for example, a hydrogen tank, but is not limited to this.
[0022] Facility 100 may be equipment that constitutes hydrogen infrastructure installed in factories, power plants, hydrogen refueling stations, etc., or it may be equipment that constitutes a system for an international hydrogen supply chain, but is not limited to these.
[0023] As shown in Figure 2(A), the GHG emission calculation device 50 comprises an acquisition device 50A and a processing circuit 50B of a control device.
[0024] The data acquisition device 50A acquires the identification code (hereinafter referred to as the hydrogen ID) of hydrogen transported from the hydrogen supply source through the introduction pipeline 10A to the hydrogen compressor 11, and the GHG emissions associated with the hydrogen ID. Examples of data acquisition devices 50A include communication devices. Examples of communication devices include I / O interfaces.
[0025] Here, the hydrogen transported to the hydrogen compressor 11 can be identified as a "hydrogen ID" based on the mass flow rate of the hydrogen passing through the introduction pipeline 10A. The mass flow rate of hydrogen can be determined, for example, from the temperature, pressure, and flow rate of the hydrogen in the introduction pipeline 10A. Here, the GHG emission calculation device 50 may include a thermometer T for measuring the temperature of the hydrogen in the hydrogen compressor 11, a pressure meter P for measuring the pressure of the hydrogen, and a flow meter F for measuring the flow rate of the hydrogen, as shown in Figure 2(B). Then, the processing circuit 50B can calculate the mass flow rate of hydrogen in the hydrogen compressor 11 based on the measurement data from the thermometer T, the pressure meter P, and the flow meter F, and as a result, the GHG emission calculation device 50 can accurately estimate the amount of GHG emissions caused by changes in the mass flow rate of hydrogen.
[0026] "GHG emissions associated with hydrogen ID" can be identified from GHG emissions resulting from hydrogen production, GHG emissions resulting from hydrogen transport in the introduction pipeline 10A, etc. For example, when producing hydrogen, carbon dioxide (CO2), which is an example of GHG, is emitted. ２It is generally known that there are two types of hydrogen: hydrogen that is released into the atmosphere as CO2 and hydrogen that is not. An example of the former is hydrogen produced from fossil fuels such as natural gas in a reformer. An example of the latter is CO2 generated by the reforming reaction of fossil fuels. ２ Examples include hydrogen processed using underground storage methods, or hydrogen produced in a water electrolysis device using renewable energy such as solar or wind power generation. Then, by obtaining information on the mass flow rate of each of the above types of hydrogen in the hydrogen pipeline 10 linked to the hydrogen ID, it is possible to grasp the GHG emissions resulting from hydrogen production.
[0027] The control device's processing circuit 50B calculates the first GHG emissions resulting from the first energy being consumed by the hydrogen compressor 11 out of the energy consumed at the facility 100, and adds the first GHG emissions to the GHG emissions associated with the hydrogen ID.
[0028] Here, "addition" may mean, but is not limited to, adding "GHG emissions" and "first GHG emissions". For example, if "GHG emissions" are stored and managed in a tabular format for each ID in the memory circuit of the control device, the above "addition" may be performed by adding the data for "first GHG emissions" as a new item to this table. In this case, the hydrogen ID may be newly registered or split and updated in accordance with the first GHG emissions due to the consumption of first energy by the hydrogen compressor 11, but in such a form, since the GHG emissions caused by the hydrogen compressor 11 change moment by moment, there is a possibility that the number of hydrogen IDs will be excessive or that the hydrogen IDs will be too subdivided.
[0029] Therefore, it is preferable to maintain the hydrogen ID as is, without performing new registration or renewal registration, and define the cumulative value of "GHG emissions" during the compression period in which hydrogen is compressed by the hydrogen compressor 11 as the "additional GHG emissions" corresponding to this hydrogen ID.
[0030] The "first energy source" may be electricity or fuel used to perform the hydrogen compression operation in the hydrogen compressor 11. In the case of the hydrogen compressor 11, for example, if electricity is used as the power source, the "first GHG emissions" can be calculated by measuring the electricity using a power meter or the like. A specific example of such a calculation method will be explained in the example.
[0031] Furthermore, the control device may include a memory circuit for storing a control program in addition to the processing circuit 50B, and may control the overall operation of the facility 100. Examples of the processing circuit 50B include an MPU, a CPU, etc. Examples of the memory circuit include a memory, etc. The control device may consist of a single controller that performs centralized control, or it may consist of multiple controllers that cooperate with each other to perform distributed control.
[0032] The functions of the elements disclosed herein can be performed using circuits or processing circuits, including general-purpose processors, dedicated processors, integrated circuits, ASICs (Application Specific Integrated Circuits), conventional circuits, or combinations thereof, configured or programmed to perform the disclosed functions. A processor is considered a processing circuit or circuit because it includes transistors and other circuits. In this specification, a circuit, unit, or means is hardware that performs the enumerated functions, or hardware programmed to perform the enumerated functions. The hardware may be hardware disclosed herein, or other known hardware that is programmed or configured to perform the enumerated functions. If the hardware is a processor, which is considered a type of circuit, then the circuit, unit, or means is a combination of hardware and software, and the software is used to configure the hardware or processor.
[0033] [Operation] Figure 3 is a flowchart showing an example of the operation (GHG emission calculation method) of the GHG emission calculation device of the first embodiment.
[0034] The following operations may be performed, for example, when the processing circuit 50B of the control device reads a control program from the storage circuit of the control device. However, it is not necessarily essential to perform the following operations by the processing circuit 50B of the control device. The operator may perform some of the operations. In the following example, the case where the operations are controlled by the processing circuit 50B will be described.
[0035] In step S1, a hydrogen ID and a GHG emission amount associated with the hydrogen ID are acquired. For example, the hydrogen ID and the GHG emission amount associated with the hydrogen ID may be acquired via a communication network by a communicator which is an example of the acquirer 50A. The data communication of the communication network may be a method in which communication is performed one-to-one.
[0036] Next, in step S2, among the energy consumed in the facility 100, a first GHG emission amount due to the consumption of the first energy by the hydrogen compressor 11 is calculated. The "first energy" may be, as described above, electric power or fuel for performing a hydrogen compression operation by the hydrogen compressor 11.
[0037] Next, the "first GHG emission amount" in step S3 is added to the "GHG emission amount" in step S1. The content of "addition" is the same as above, so the description is omitted.
[0038] As described above, the GHG emission amount calculation device 50 and the GHG emission amount calculation method of the present embodiment are associated with the hydrogen ID of the hydrogen pipeline 10, and the GHG emission amount that changes moment by moment in the hydrogen compressor 11 can be calculated more appropriately than in the prior art.
[0039] Specifically, the energy source required when transporting hydrogen through the hydrogen pipeline 10 has not been accurately grasped conventionally. And, the more energy is consumed in hydrogen transportation, the more likely the GHG emission amount due to hydrogen transportation is to increase. A considerable amount of energy is consumed in the hydrogen compressor 11 on the hydrogen pipeline 10.
[0040] Therefore, in the GHG emission calculation device 50 and the GHG emission calculation method of the present embodiment, the first GHG emission amount due to the consumption of the first energy by the hydrogen compressor 11 is added to the GHG emission amount associated with the hydrogen ID, so that accurate information on GHG emissions caused by hydrogen transportation, an objective index regarding hydrogen sorting managed for each hydrogen ID, appropriate information regarding the selection of a hydrogen transportation route, etc. can be provided to hydrogen consumers and hydrogen transportation operators.
[0041] (Example) FIG. 4 is a diagram showing an example of a GHG emission calculation device according to an example of the first embodiment.
[0042] As shown in FIG. 4, the GHG emission calculation device 50 includes an acquirer 50A, a processing circuit 50B of a control device, and a first measuring instrument 50C. Here, since the acquirer 50A is the same as described above, the description thereof is omitted.
[0043] The first measuring instrument 50C is a device that measures in real time the power for performing the hydrogen compression operation by the hydrogen compressor 11. Examples of the first measuring instrument 50C include, but are not limited to, a wattmeter that measures the power transmitted from the power system to the hydrogen compressor 11.
[0044] When the GHG is carbon dioxide, the processing circuit 50B of the control device multiplies the integrated value (kWh) of the measurement data of the first measuring instrument 50C in a predetermined compression period by a predetermined emission factor [(t - CO ２ ) / kWh] to calculate the first GHG emission amount (t - CO ２ ) due to the consumption of power by the hydrogen compressor 11.
[0045] Here, the "predetermined emission factor" is, for example, when grid power is used as the power source of the hydrogen compressor 11, the emission factors listed by electric power companies [(t - CO ２Information on [) / kWh] is publicly available and can be found from such publicly available lists. In this case, the first GHG emissions are classified as Scope 2 under the GHG Protocol (indirect emissions associated with the use of electricity, heat, and steam provided by other companies). However, if the power source for the hydrogen compressor 11 is supplied by the operator's own power generation, the first GHG emissions are classified as Scope 1 under the GHG Protocol (direct emissions of GHG by the operator itself).
[0046] As described above, the GHG emission calculation device 50 of this embodiment measures the power used to compress hydrogen in the hydrogen compressor 11 in real time. Compared to the case where such power is not measured in real time, this device can promptly determine the first GHG emissions resulting from the power consumption of the hydrogen compressor 11.
[0047] However, the above is merely an example and is not limited to this example. For example, if fuel is used as the power source for the hydrogen compressor 11, the first measuring instrument 50C may be a device that measures the flow rate of fuel for performing the hydrogen compression operation in the hydrogen compressor 11 in real time. In this case, the first GHG emissions are classified as Scope 1 (direct emissions of GHG by the operator itself) in the GHG protocol.
[0048] The GHG emission calculation device 50 of this embodiment may be the same as that of the first embodiment, except for the features described above.
[0049] (Second Embodiment) The GHG emission calculation device 50 of the second embodiment is the same as that of the first embodiment, except for the processing content of the processing circuit 50B of the control device described below.
[0050] The control device's processing circuit 50B calculates the secondary GHG emissions by distributing the total GHG emissions resulting from the manufacture of equipment or machinery purchased from other companies over the planned operating life of the equipment or machinery, and adds the secondary GHG emissions to the GHG emissions associated with the hydrogen ID. The details of the "addition" are the same as described above, so the explanation is omitted.
[0051] Figures 5A and 5B of Figure 5 show an example of the processing content of the control device's processing circuit 50B when the equipment purchased from another company is a hydrogen compressor 11.
[0052] As shown in Figure 5A, the control device's processing circuit 50B calculates the second GHG emission by distributing the total GHG emissions resulting from the manufacture of the hydrogen compressor 11 at a fixed rate over the planned operating period of the hydrogen compressor 11, and adds the second GHG emission to the GHG emission associated with the hydrogen ID. After the planned operating period of the hydrogen compressor 11 has elapsed, the second GHG emission may be set to zero, or to a fixed amount greater than zero.
[0053] Furthermore, as shown in Figure 5B, the control device's processing circuit 50B calculates the second GHG emissions by distributing the total GHG emissions resulting from the manufacture of the hydrogen compressor 11 at a fixed rate over the planned operating period of the hydrogen compressor 11, and adds the second GHG emissions to the GHG emissions associated with the hydrogen ID. After the planned operating period of the hydrogen compressor 11 has elapsed, the second GHG emissions may be set to zero, or to a fixed amount that is greater than zero and less than the fixed amount.
[0054] Here, the "total GHG emissions" can be determined by receiving reports from other companies, such as "The total GHG emissions related to the manufacture of hydrogen compressors were XX tons."
[0055] The "planned operating life of the hydrogen compressor 11" can be predicted from the catalog specifications of the hydrogen compressor 11 or its useful life under tax law.
[0056] As described above, the GHG emission calculation device 50 of this embodiment can accurately calculate the GHG emissions associated with a hydrogen ID by adding the total GHG emissions resulting from the manufacture of equipment or machinery purchased from other companies to the GHG emissions associated with a hydrogen ID, compared to the case where such total GHG emissions are not considered.
[0057] The GHG emission calculation device 50 of this embodiment may be the same as that of the first embodiment or an example of the first embodiment, except for the features described above.
[0058] (Modified Version) The GHG emission calculation device 50 of the modified version of the second embodiment is the same as the first embodiment, except for the processing content of the processing circuit 50B of the control device described below.
[0059] The control device's processing circuit 50B calculates the third GHG emission by distributing the total GHG emissions resulting from the maintenance of equipment or machinery purchased from other companies over the maintenance cycle of the equipment or machinery, and adds the third GHG emission to the GHG emission associated with the hydrogen ID. The details of the "addition" are the same as described above, so the explanation is omitted.
[0060] Figures 6A and 6B of Figure 6 show an example of the processing content of the control device's processing circuit 50B when the equipment purchased from another company is a hydrogen compressor 11.
[0061] As shown in Figure 6A, the control device's processing circuit 50B calculates a third GHG emission by distributing the total GHG emissions resulting from the maintenance of the hydrogen compressor 11 at a constant rate over the maintenance cycle of the hydrogen compressor 11, and adds the third GHG emission to the GHG emissions associated with the hydrogen ID.
[0062] Furthermore, as shown in Figure 6B, the control device's processing circuit 50B calculates a third GHG emission by distributing the total GHG emissions resulting from the maintenance of the hydrogen compressor 11 at a fixed rate over the maintenance cycle of the hydrogen compressor 11, and adds the third GHG emission to the GHG emissions associated with the hydrogen ID.
[0063] Here, the "total GHG emissions" can be determined by receiving reports from other companies, such as "The total GHG emissions related to hydrogen compressor maintenance were XX tons."
[0064] The maintenance cycle for the hydrogen compressor 11 can be predicted from the catalog specifications of the hydrogen compressor 11.
[0065] As described above, the modified GHG emission calculation device 50 can accurately calculate the GHG emissions associated with hydrogen IDs compared to the case where such total GHG emissions are not considered, by adding the total GHG emissions resulting from the maintenance of equipment or machinery purchased from other companies to the GHG emissions associated with hydrogen IDs.
[0066] The modified GHG emission calculation device 50 may be the same as that of the first embodiment, the embodiment of the first embodiment, and the second embodiment, except for the features described above.
[0067] (Third Embodiment) The GHG emission calculation device 50 of the third embodiment is the same as that of the first embodiment, except for the processing content of the processing circuit 50B of the control device described below.
[0068] The control device's processing circuit 50B calculates the fourth GHG emissions from non-operating GHG emissions related to the activities of the operator of facility 100, and adds the fourth GHG emissions to the GHG emissions associated with the hydrogen ID. The details of the "addition" are the same as described above, so the explanation is omitted.
[0069] Here, "GHG emissions from non-operating entities related to the activities of the operator of Facility 100" corresponds to Scope 3 (emissions from other entities related to the activities of the operator) in the GHG Protocol, and such GHG emissions include (A) GHG emissions that can be measured in real time, resulting from energy consumption such as electricity and fuel, and (B) GHG emissions that cannot be measured in real time, resulting from labor by workers, procurement of raw materials, transportation of products, waste disposal, etc.
[0070] Therefore, in this embodiment, the fourth GHG emission is calculated as follows, based on GHG emissions from non-operators related to the facility operator's activities, by dividing them into (A) GHG emissions and (B) GHG emissions.
[0071] Figure 7 shows an example of a GHG emission calculation device according to the third embodiment. Figure 8 is a diagram illustrating an example of the processing content of the processing circuit in the GHG emission calculation device according to the third embodiment.
[0072] As shown in FIG. 7, the GHG emission calculation device 50 includes an acquirer 50A, a processing circuit 50B of the control device, and a second measuring device 50D. Here, since the acquirer 50A is the same as described above, the description thereof is omitted.
[0073] The second measuring device 50D is a device that measures, in real time, second energy other than the energy directly consumed by the facilities in the facility 100 among the energy consumed in the facility 100.
[0074] Here, the "second energy" may be electric power or fuel consumed in the back office.
[0075] Therefore, in the following example, the case where the second measuring device 50D is an electricity meter that measures electric power will be described.
[0076] The processing circuit 50B of the control device multiplies a value G obtained by multiplying the integrated value (kWh) of the measurement data of the second measuring device 50D in a predetermined period by the power ratio M of the facilities in the facility 100 by a predetermined emission factor [(t - CO ２ 2) / kWh] to further calculate the first emission amount (t - CO ２ 2) included in the fourth GHG emission amount due to GHG emissions by parties other than the operator related to the activities of the operator of the facility 100. As a result, by measuring the electric power consumed in the back office in real time, compared with the case where such electric power is not measured in real time, the first emission amount included in the fourth GHG emission amount due to GHG emissions by parties other than the operator related to the activities of the operator of the facility 100 can be grasped in a timely manner.
[0077] The "predetermined emission factor" can be known from such a published list, for example, when grid power is used as the power source of the back office, the information on the emission factor [(t - CO ２ 2) / kWh] listed for each electric power company is published.
[0078] Here, the "value G obtained by multiplying the integrated value (kWh) of the measurement data of the second measuring device 50D by the power ratio M of the facilities in the facility 100" can be formulated by the following formula (1).
[0079] G = ((Total power consumption of the facility - Direct power consumption of equipment within the facility) time integral) × M ... (1) In equation (1), "(Total power consumption of the facility) - (Direct power consumption of equipment within the facility) time integral" corresponds to the integral value (kWh) of the measurement data of the second measuring instrument 50D over a predetermined period.
[0080] Furthermore, in equation (1), the power ratio M of the equipment within facility 100 can be formulated by the following equation (2).
[0081] M = Power consumption of equipment within facility 100 / Σ Power consumption of each piece of equipment within the facility ... (2) In equation (2), "Σ Power consumption of each piece of equipment within the facility" means the sum of the power consumption consumed by each piece of equipment within facility 100.
[0082] Thus, in this embodiment, in calculating the first emissions caused by electricity consumed in the back office, the electricity obtained by subtracting the total electricity directly consumed by each piece of equipment within the facility 100 from the total electricity consumption of the entire facility 100 is considered as the electricity consumption of the back office. Of this electricity consumption, the power ratio M of the equipment within the facility 100 is allocated to the equipment, thereby deriving "the value G obtained by multiplying the integral value (kWh) of the measurement data of the second measuring instrument 50D by the power ratio M of the equipment within the facility 100".
[0083] The control device's processing circuit 50B calculates the second emission amount included in the fourth GHG emission amount from non-operators related to the facility 100's activities by averaging over a predetermined period, as shown in the averaging addition in Figure 8(B). This averages the GHG emissions from non-operators related to the facility 100's activities that cannot be measured in real time. As a result, the second emission amount included in the fourth GHG emission amount from non-operators related to the facility 100's activities is added to the GHG emission amount associated with the hydrogen ID, allowing for a more accurate calculation of the GHG emission amount associated with the hydrogen ID compared to when such second emission amount is not considered.
[0084] Examples of "GHG emissions that cannot be measured in real time" include GHG emissions resulting from the labor of workers, the purchase of raw materials, etc., as mentioned above.
[0085] For GHG emissions that cannot be measured in real time, the amount of GHG emissions may be calculated using emission reports provided by other companies, or by the business operator itself through appropriate information gathering.
[0086] In the latter case, for example, as an example of "GHG emissions that cannot be measured in real time," let's explain "GHG emissions caused by employees' commutes." Information such as the employee's commute distance and means of commuting is collected, the GHG emission coefficient based on the means of commuting is confirmed, and the GHG emissions due to employees' commutes are calculated by multiplying the commute distance by the GHG emission coefficient.
[0087] As described above, the GHG emission calculation device 50 of this embodiment can accurately calculate the GHG emission associated with a hydrogen ID by adding the fourth GHG emission from non-operators related to the activities of the operator of facility 100 to the GHG emission associated with a hydrogen ID, compared to the case where such fourth GHG emission is not considered.
[0088] The GHG emission calculation device 50 of this embodiment may be the same as any of the first embodiment, an example of the first embodiment, the second embodiment, and a modified version of the second embodiment, except for the features described above.
[0089] Furthermore, the first embodiment, the embodiment of the first embodiment, the second embodiment, the modified form of the second embodiment, and the third embodiment may be combined with each other, as long as they do not exclude one another.
[0090] From the above description, many improvements and other embodiments of the disclosure will be apparent to those skilled in the art. Therefore, the above description should be interpreted as illustrative only and is provided for the purpose of teaching those skilled in the art how to implement the disclosure. The structure and function of the disclosure can be substantially modified without departing from the spirit of the disclosure. For example, while carbon dioxide is given as an example of a GHG above, the technology of the disclosure can be adapted to other greenhouse gases such as methane.
[0091] (Regarding the various aspects of this disclosure) Based on the above description, the following aspects of this disclosure can be devised.
[0092] A GHG emission calculation device according to a first aspect of this disclosure is a device for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, comprising: an acquirer that acquires an identification code for hydrogen transported from a hydrogen source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the hydrogen identification code; and a processing circuit that calculates a first GHG emission due to the consumption of first energy by the hydrogen compressor from the energy consumed at the facility, and adds the first GHG emission to the GHG emissions associated with the hydrogen identification code.
[0093] With the above configuration, the GHG emission calculation device of this embodiment can be associated with the identification code of hydrogen in the hydrogen transport route, and the GHG emissions that change moment by moment at the hydrogen compressor can be calculated more appropriately than in the conventional method. Specifically, the energy sources required when transporting hydrogen via the hydrogen transport route have not been accurately determined in the past. Furthermore, the more energy consumed in hydrogen transport, the greater the potential for GHG emissions attributable to hydrogen transport, and a considerable amount of energy is consumed at the hydrogen compressor along the hydrogen transport route.
[0094] Therefore, in the GHG emission calculation device of this embodiment, by adding the first GHG emission resulting from the consumption of first energy in the hydrogen compressor to the GHG emission associated with the hydrogen identification code, accurate information on GHG emissions caused by hydrogen transport, objective indicators regarding hydrogen sorting managed for each hydrogen identification code, and appropriate information regarding the selection of hydrogen transport routes can be provided to hydrogen consumers and hydrogen transport operators. In the second embodiment of the GHG emission calculation device of this disclosure, the GHG emission calculation device of the first embodiment is further equipped with a flow meter for measuring the flow rate of hydrogen in the hydrogen compressor, a thermometer for measuring the temperature of the hydrogen, and a pressure meter for measuring the pressure of the hydrogen, and the processing circuit may calculate the mass flow rate of hydrogen in the hydrogen compressor based on the measurement data of the flow meter, thermometer, and pressure meter. With the above configuration, the GHG emission calculation device of this embodiment can accurately estimate the amount of GHG emissions caused by changes in the mass flow rate of hydrogen by calculating the mass flow rate of hydrogen in the hydrogen compressor.
[0095] A third aspect of the present disclosure is a GHG emission calculation device that, in the first or second aspect of the present disclosure, includes a first measuring instrument for measuring first energy in real time, and the processing circuit may calculate first GHG emissions by multiplying the integral value of the measurement data of the first measuring instrument during a predetermined compression period by a predetermined emission coefficient.
[0096] With the above configuration, the GHG emission calculation device of this embodiment can measure the first energy required to perform the hydrogen compression operation in the hydrogen compressor in real time, and compared to the case where such first energy is not measured in real time, it can grasp the first GHG emissions resulting from the consumption of the first energy in the hydrogen compressor in a timely manner.
[0097] A fourth aspect of the present disclosure is a GHG emissions calculation device in any one of the first to third aspects, wherein the first energy may be electricity or fuel consumed by a hydrogen compressor.
[0098] The fifth aspect of the present disclosure is a GHG emission calculation device in any one of the first to fourth aspects, in which the processing circuit calculates a second GHG emission by distributing the total GHG emissions resulting from the manufacture of equipment or machinery purchased from another company over the planned number of years of operation of the equipment or machinery, and adds the second GHG emission to the GHG emission associated with the hydrogen identification code.
[0099] With the above configuration, the GHG emission calculation device of this embodiment can accurately calculate the GHG emissions associated with the hydrogen identification code compared to cases where such total GHG emissions are not considered, because the total GHG emissions resulting from the manufacture of equipment or machinery purchased from other companies are added to the GHG emissions associated with the hydrogen identification code.
[0100] The sixth aspect of the present disclosure is a GHG emission calculation device in any one of the first to fifth aspects, in which the processing circuit calculates a third GHG emission by distributing the total GHG emissions resulting from the maintenance of equipment or machinery purchased from another company over the scheduled maintenance cycle of the equipment or machinery, and adds the third GHG emission to the GHG emission associated with the hydrogen identification code.
[0101] With the above configuration, the GHG emission calculation device of this embodiment can accurately calculate the GHG emissions associated with the hydrogen identification code compared to the case where such total GHG emissions are not considered, because the total GHG emissions resulting from the maintenance of equipment or machinery purchased from other companies are added to the GHG emissions associated with the hydrogen identification code.
[0102] The GHG emission calculation device of the seventh aspect of this disclosure, in any one of the GHG emission calculation devices of the first to sixth aspects, may have a processing circuit that calculates a fourth GHG emission due to GHG emissions from non-operators related to the facility operator's activities, and adds the fourth GHG emission to the GHG emission associated with the hydrogen identification code.
[0103] With the above configuration, the GHG emission calculation device of this embodiment can accurately calculate the GHG emission associated with the hydrogen identification code compared to the case where such fourth GHG emissions are not considered, by adding the fourth GHG emission from non-operators related to the facility operator's activities to the GHG emission associated with the hydrogen identification code.
[0104] The GHG emission calculation device of the eighth aspect of this disclosure is a GHG emission calculation device of the seventh aspect that includes a second measuring instrument that measures in real time a second energy other than the energy directly consumed by the equipment within the facility, and the processing circuit may calculate the first emission included in the fourth GHG emission due to GHG emissions from non-operators related to the facility operator's activities by multiplying the integral value of the measurement data of the second measuring instrument over a predetermined period by the power ratio of the equipment within the facility, and further multiplying the result by a predetermined emission coefficient. Furthermore, the GHG emission calculation device of the ninth aspect of this disclosure is a GHG emission calculation device of the eighth aspect that the second energy may be electricity or fuel consumed in the back office.
[0105] With the above configuration, the GHG emission calculation device of this embodiment can measure the second energy consumed in the back office in real time, and compared to the case where such second energy is not measured in real time, it can timely grasp the first emissions included in the fourth GHG emissions from GHG emissions other than those of businesses related to the facility operator's activities.
[0106] The GHG emission calculation device of the tenth aspect of this disclosure, in the GHG emission calculation device of the seventh aspect, may calculate the second emission amount included in the fourth GHG emission amount due to GHG emissions from non-operators related to the facility operator's activities by averaging over a predetermined period the GHG emissions from non-operators related to the facility operator's activities that cannot be measured in real time.
[0107] With the above configuration, the GHG emission calculation device of this embodiment can accurately calculate the GHG emission associated with the hydrogen identification code compared to the case where such second emission is not considered, because the second emission included in the fourth GHG emission due to GHG emissions that cannot be measured in real time is added to the GHG emission associated with the hydrogen identification code.
[0108] A method for calculating GHG emissions according to an eleventh aspect of this disclosure is a method for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, comprising: obtaining an identification code for hydrogen transported from a hydrogen source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the hydrogen identification code; calculating a first GHG emission due to the consumption of a first energy from the energy consumed at the facility by the hydrogen compressor; and adding the first GHG emission to the GHG emissions associated with the hydrogen identification code.
[0109] Based on the above, the GHG emission calculation method of this embodiment can be associated with the identification code of hydrogen in the hydrogen transport route, and the GHG emissions that change moment by moment in the hydrogen compressor can be calculated more appropriately than in the conventional method. The details of the effects of the GHG emission calculation method of this embodiment are the same as the details of the effects of the GHG emission calculation device of the first embodiment, so the explanation will be omitted.
[0110] 10: Hydrogen pipeline 10A: Intake pipeline 10B: Discharge pipeline 11: Hydrogen compressor 50: GHG emission calculation device 50A: Acquisition device 50B: Processing circuit 50C: First measuring instrument 50D: Second measuring instrument 100: Facility
Claims
1. A GHG emission calculation device for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, comprising: an acquirer that acquires an identification code of hydrogen transported from a hydrogen supply source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the identification code of the hydrogen; and a processing circuit that calculates a first GHG emission due to the consumption of a first energy from the energy consumed at the facility by the hydrogen compressor, and adds the first GHG emission to the GHG emissions associated with the identification code of the hydrogen.
2. The GHG emission calculation device according to claim 1, comprising a flow meter for measuring the flow rate of hydrogen in the hydrogen compressor, a thermometer for measuring the temperature of the hydrogen, and a pressure meter for measuring the pressure of the hydrogen, wherein the processing circuit calculates the mass flow rate of the hydrogen in the hydrogen compressor based on the measurement data of the flow meter, the thermometer, and the pressure meter.
3. The GHG emission calculation device according to claim 1, comprising a first measuring instrument for measuring the first energy in real time, wherein the processing circuit calculates the first GHG emission by multiplying the integral value of the measurement data of the first measuring instrument during a predetermined compression period by a predetermined emission coefficient.
4. The GHG emission calculation device according to any one of claims 1 to 3, wherein the first energy is electricity or fuel consumed by the hydrogen compressor.
5. The GHG emission calculation device according to claim 1, wherein the processing circuit calculates a second GHG emission by distributing the total GHG emissions resulting from the manufacture of equipment or machinery purchased from another company over the planned number of years of operation of the equipment or machinery, and adds the second GHG emission to the GHG emission associated with the hydrogen identification code.
6. The GHG emission calculation device according to claim 1, wherein the processing circuit calculates a third GHG emission by distributing the total GHG emissions resulting from the maintenance of equipment or machinery purchased from another company over the scheduled maintenance cycle of the equipment or machinery, and adds the third GHG emission to the GHG emission associated with the hydrogen identification code.
7. The GHG emission calculation device according to claim 1, wherein the processing circuit calculates a fourth GHG emission due to GHG emissions from non-operators related to the activities of the operator of the facility, and adds the fourth GHG emission to the GHG emission associated with the hydrogen identification code.
8. The GHG emission calculation device according to claim 7, comprising a second measuring instrument that measures in real time a second energy other than the energy directly consumed by the equipment within the facility, and the processing circuit calculates the first emission included in the fourth GHG emission by multiplying the integral value of the measurement data of the second measuring instrument over a predetermined period by the power ratio of the equipment within the facility, and further multiplying the result by a predetermined emission coefficient.
9. The GHG emissions calculation device according to claim 8, wherein the second energy is electricity or fuel consumed in the back office.
10. The GHG emission calculation device according to claim 7, wherein the processing circuit calculates the second emission amount included in the fourth GHG emission amount by averaging over a predetermined period the GHG emission amount from GHG emissions other than those of the aforementioned business operator that cannot be measured in real time.
11. A method for calculating GHG emissions in a facility equipped with at least one hydrogen compressor, comprising: obtaining an identification code for hydrogen transported from a hydrogen source to the hydrogen compressor via a hydrogen transport route and the GHG emissions associated with the identification code for hydrogen; calculating a first GHG emission due to the consumption of a first energy component by the hydrogen compressor from the energy consumed at the facility; and adding the first GHG emission to the GHG emissions associated with the identification code for hydrogen.