Hydrogen Supply System

Abstract

To return environmental values associated with consumption of green hydrogen to consumers.SOLUTION: A hydrogen production device 110 produces hydrogen by electrolyzing water by using renewable energy electricity. An environmental value aggregation server 120 calculates a total amount of carbon dioxide that has been reduced in producing the hydrogen by multiplying an electricity amount of the renewable energy electricity used for the electrolysis by an amount of carbon dioxide contained in a unit amount of electricity generated by using fossil fuels, and applies to a certification server to issue a certificate that certifies the amount of carbon dioxide. A certificate trading server 130 generates income information regarding income earned by selling the certificate. An environmental value distribution server 140 outputs, to a hydrogen trading server 114, distribution information required for distributing income according to an amount of purchase. The hydrogen trading server 114 reflects the distribution on a bill according to the amount of purchase based on the distribution information.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a hydrogen supply system, method, and program for supplying hydrogen to consumers. [Background technology]

[0002] Conventionally, configurations that visualize the environmental contribution of electricity consumption as environmental value have been known. For example, Japanese Patent Application Laid-Open No. 2021-34826 (Patent Document 1) discloses an energy trading system that generates environmental coins based on transactions related to electricity that have environmental value. These environmental coins can be traded in the non-fossil value trading market of the wholesale electricity exchange in conjunction with J-Credits or Green Power Certificates. This energy trading system can provide incentives for renewable energy suppliers and consumers to contribute to the environment. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-34826 Summary of the Invention [Problem to be solved by the invention]

[0004] Hydrogen produced by the electrolysis of water is a well-known energy source produced using electricity. Hydrogen produced using electricity is classified as green hydrogen if the electricity comes from renewable energy sources, and as gray hydrogen if the electricity comes from fossil fuels. When consumers use green hydrogen, the environmental contribution of carbon dioxide (CO2) reduction is generated as environmental value attributed to the consumer compared to when consumers use gray hydrogen. However, it is often economically unreasonable for consumers to measure the amount of green hydrogen consumed and aggregate the environmental value corresponding to that consumption to a tradable scale. As a result, the environmental value corresponding to the amount of green hydrogen consumed may go unrewarded and not be returned to the consumer.

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to return the environmental value associated with the consumption of green hydrogen to consumers. [Means for solving the problem]

[0006] A hydrogen supply system according to one aspect of the present disclosure supplies hydrogen to consumers. The hydrogen supply system includes a hydrogen production device, a hydrogen trading server, an environmental value aggregation server, a certificate trading server, and an environmental value distribution server. The hydrogen production device produces hydrogen by electrolyzing water using renewable energy electricity. The hydrogen trading server bills consumers according to the amount purchased from the hydrogen supply system. The environmental value aggregation server calculates the total amount of carbon dioxide reduced in hydrogen production by multiplying the amount of renewable energy electricity used in the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels, and applies to the authentication server for the issuance of a certificate with an authenticated amount of carbon dioxide. The certificate trading server generates income information regarding income obtained by selling the certificate. The environmental value distribution server uses the income information and the amount of hydrogen produced corresponding to the amount of electricity to output distribution information necessary for distributing income according to the amount purchased to the hydrogen trading server. The hydrogen trading server reflects the distribution in the bill based on the distribution information.

[0007] In the hydrogen supply system, the distribution information may include sales price data for reducing a standard charge based on the amount of hydrogen purchased based on the distribution. The hydrogen trading server may determine the charge based on the amount of hydrogen purchased based on the sales price data.

[0008] In the hydrogen supply system, the distribution information may include point conversion data for converting a purchased amount of hydrogen into common points. The hydrogen trading server may award common points to the consumer according to the purchased amount based on the point conversion data.

[0009] A method according to another aspect of the present disclosure is carried out in a hydrogen supply system that supplies hydrogen to consumers. The method includes the steps of producing hydrogen by electrolyzing water using renewable energy electricity, billing the consumer according to the amount of hydrogen purchased from the hydrogen supply system, calculating the total amount of carbon dioxide reduced in the production of hydrogen by multiplying the amount of renewable energy electricity used for the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels, applying to an authentication server for issuance of a certificate in which the amount of carbon dioxide is authenticated, generating income information on income obtained by selling the certificate, outputting distribution information necessary for distributing income according to the amount of purchase using the income information and the amount of hydrogen produced corresponding to the amount of electricity, and reflecting the distribution in the bill based on the distribution information.

[0010] According to another aspect of the present disclosure, at least one program is executed in a hydrogen supply system that supplies hydrogen to consumers. The hydrogen is produced by electrolyzing water using renewable energy electricity. When executed by a processor, the at least one program bills the consumer according to the amount of hydrogen purchased from the hydrogen supply system, calculates the total amount of carbon dioxide reduced in the production of hydrogen by multiplying the amount of renewable energy electricity used in the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels, applies to an authentication server for issuance of a certificate verifying the amount of carbon dioxide, generates income information regarding income obtained by selling the certificate, outputs distribution information necessary for distributing income according to the amount of purchase using the income information and the amount of hydrogen produced corresponding to the amount of electricity, and reflects the distribution in the invoice based on the distribution information. [Effects of the Invention]

[0011] According to the present disclosure, the environmental value associated with the consumption of green hydrogen can be returned to consumers by reflecting the distribution of income according to the amount of green hydrogen purchased in the invoice based on the distribution information necessary for the distribution of income according to the amount of green hydrogen purchased. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram showing the configuration of a hydrogen supply system according to a first embodiment. [Figure 2] 2 is a diagram showing the hardware configuration of each of the hydrogen trading server, the environmental value aggregation server, the certificate trading server, and the environmental value distribution server of FIG. 1. FIG. [Figure 3] FIG. 2 is a flowchart showing the flow of processing carried out at each sampling time by each of the environmental value distribution server, the environmental value aggregation server, and the certificate transaction server of FIG. 1. [Figure 4] FIG. 10 is a block diagram showing the configuration of a hydrogen supply system according to a second embodiment. [Figure 5]FIG. 5 is a diagram showing a flowchart illustrating the flow of processing carried out at each sampling time by each of the environmental value distribution server, the environmental value aggregation server, and the certificate transaction server of FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, the same parts and components are designated by the same reference numerals, and redundant description will not be repeated.

[0014] [Embodiment 1] FIG. 1 is a block diagram showing the configuration of a hydrogen supply system 100 according to the first embodiment. As shown in FIG. 1, the hydrogen supply system 100 includes a hydrogen production device 110, a power metering device 111, a hydrogen metering device 112, a hydrogen trading server 114, an environmental value aggregation server 120, a certificate trading server 130, and an environmental value distribution server 140. The hydrogen supply system 100 produces hydrogen by electrolyzing water using carbon-free electricity (renewable energy electricity) supplied by a power generation company 200, and supplies the hydrogen to consumers via a hydrogen station 300. The consumers are, for example, users of hydrogen vehicles (fuel cell vehicles (FCVs)) 600. The power generation company 200 generates carbon-free electricity by power generation using renewable energy sources (for example, solar, wind, hydroelectric, geothermal, or biomass) or by nuclear power generation.

[0015] The hydrogen production device 110 produces hydrogen by electrolyzing water using carbon-free electricity supplied by the power generation company 200, and supplies the hydrogen to the hydrogen station 300. The hydrogen station 300 includes a hydrogen supply device 310 and a payment system 320. The hydrogen supply device 310 outputs sales data regarding the amount of hydrogen sold from the hydrogen station 300 to the hydrogen trading server 114. The power metering device 111 measures the amount of carbon-free electricity supplied by the power generation company 200, and outputs this amount of electricity to the environmental value aggregation server 120. The hydrogen metering device 112 measures the production amount (shipment amount) of hydrogen produced by the hydrogen production device 110, and outputs this production amount to the environmental value distribution server 140.

[0016] The user of the hydrogen vehicle 600 refuels the hydrogen vehicle 600 with hydrogen from the hydrogen supply device 310 at the hydrogen station 300. The user of the hydrogen vehicle 600 pays the hydrogen supply system 100 via the payment system 320 an amount corresponding to the amount of hydrogen refueled (consumed) in the hydrogen vehicle 600. The hydrogen trading server 114 bills the user according to the amount refueled (purchased) from the hydrogen station 300.

[0017] Consumers (purchasers) of green hydrogen, such as users of hydrogen vehicles 600, accrue environmental value in the form of reduced carbon dioxide emissions compared to the consumption of gray hydrogen. However, it is often economically unreasonable for consumers to measure the amount of green hydrogen consumed each time they consume it and aggregate the environmental value corresponding to that consumption to a tradable scale. As a result, the environmental value corresponding to the amount of green hydrogen consumed may go unrewarded and not be returned to the consumer.

[0018] The hydrogen production device 110 uses the amount of electricity C (kWh) to generate A (Nm 3) of green hydrogen produced, the CO2 reduction amount D for the green hydrogen supplier and the total CO2 reduction amount B for the green hydrogen consumer are expressed as the following equations (1) and (2), respectively. The coefficient γ (kg-CO2 / kWh) in equation (1) is the amount of CO2 emitted in conjunction with the production of a unit of normal electricity generated using fossil fuels. The coefficient α (kg-CO2 / Nm 3 ) is the amount of CO2 emitted in producing one unit of grey hydrogen.

[0019]

number

[0020] The amount of green hydrogen produced, A, is calculated by dividing the amount of electricity, C, by the conversion efficiency, β (Nm 3 / kWh), it is expressed as the following equation (3).

[0021]

number

[0022] The coefficient α is expressed as the following equation (4) using the coefficient γ and the conversion efficiency β.

[0023]

number

[0024] By substituting equations (3) and (4) into equation (2), we can derive that the total CO2 reductions for green hydrogen consumers, B, is equal to the CO2 reductions for green hydrogen suppliers, D, as shown in equation (5) below.

[0025]

number

[0026] From equation (5), the total CO2 reductions (B) for green hydrogen consumers can be calculated as the CO2 reductions (D) for green hydrogen suppliers. Therefore, the hydrogen supply system 100 aggregates the environmental value generated by consumers' consumption of green hydrogen as the CO2 reductions for green hydrogen suppliers. The aggregated environmental value is made visible as a tradable certificate, and revenues earned through the trading of the certificates are distributed to consumers according to the amount of green hydrogen consumed. The hydrogen supply system 100 can return the environmental value associated with green hydrogen consumption to consumers. Furthermore, hydrogen consumers can obtain added value (incentives) by switching from gray hydrogen to green hydrogen, thereby promoting decarbonization in hydrogen consumption. Furthermore, the benefits of green hydrogen production and consumption can improve the competitiveness of hydrogen supply businesses. Furthermore, the carbon dioxide reduction effect can be documented and treated as environmental value in hydrogen trading, thereby improving the profitability of hydrogen supply businesses.

[0027] The environmental value distribution server 140 instructs the environmental value aggregation server 120 to certify the environmental value that is generated when the amount A of hydrogen produced by the hydrogen production device 110 is consumed by a consumer.

[0028] The environmental value aggregation server 120 calculates the total amount of carbon dioxide reduced in the production of green hydrogen (CO2 reduction) by multiplying the amount of electricity received from the power metering device 111 by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels (CO2 content). The CO2 content may be, for example, publicly available information on the CO2 content of general electricity published by the Ministry of the Environment. A value determined by actual machine experiments or simulations may also be used as the CO2 content. The environmental value aggregation server 120 applies to the authentication server 400 for the issuance of a certificate (CO2 reduction certificate) that certifies the amount of CO2 reduction. The certificate may be issued and traded using, for example, a blockchain. The environmental value aggregation server 120 transfers the certificate received from the authentication server 400 to the certificate trading server 130.

[0029] The certificate trading server 130 transfers the CO2 reduction certificates received from the authentication server 400 to the certificate trading server 500 of the CO2 emitting company, and receives payment for the CO2 reduction certificates from the external certificate trading server 500. The certificate trading server 130 outputs income information regarding the income obtained by selling the CO2 reduction certificates to the environmental value distribution server 140. A CO2 emitting company that purchases a CO2 reduction certificate can use the CO2 reduction certificate to prove that the CO2 reduction amount achieved by green hydrogen consumers is the CO2 reduction amount achieved by the CO2 emitting company. The trading price of the CO2 reduction certificate may be determined in advance, for example, through a bidding process.

[0030] The environmental value distribution server 140 uses the income information from the certificate trading server 130 and the amount of green hydrogen produced by the hydrogen metering device 112 to output to the hydrogen trading server 114 distribution information necessary for distributing the income from the certificate trading according to the amount of green hydrogen purchased by the consumer. Specifically, the environmental value distribution server 140 deducts expenses according to a predetermined profit rate from the income from the CO2 reduction certificate trading, outputs sales price data necessary for lowering the normal selling price (standard billing amount) of green hydrogen using the remaining trading income to the hydrogen trading server 114, and instructs the hydrogen trading server 114 to determine the price of green hydrogen based on the sales price data. The hydrogen trading server 114 reduces the normal selling price of green hydrogen based on the sales price data from the environmental value distribution server 140, thereby reflecting the distribution of income from the certificate trading according to the amount of green hydrogen purchased in the bill to the consumer. For example, if the amount of CO2 reduction associated with the shipment of green hydrogen A (>0) is certificated and revenue G is obtained after deducting the profit margin through trading of the CO2 reduction certificates, the normal selling price of green hydrogen per unit amount will be reduced by G / A.

[0031] Figure 2 is a diagram showing the hardware configuration of each of the hydrogen trading server 114, the environmental value aggregation server 120, the certificate trading server 130, and the environmental value distribution server 140 in Figure 1. Hereinafter, each of the hydrogen trading server 114, the environmental value aggregation server 120, the certificate trading server 130, and the environmental value distribution server 140 in Figure 1 will be collectively referred to simply as the servers of the hydrogen supply system 100.

[0032] 2, the server of the hydrogen supply system 100 includes, as its main components, a processor 101 that executes a program, a ROM (Read Only Memory) 102 that stores data in a non-volatile manner, a RAM (Random Access Memory) 103 that volatilely stores data generated by the execution of the program by the processor 101 or data input via an input device, a hard disk drive (HDD) 104 that stores data in a non-volatile manner, a communication IF (Interface) 105, operation keys 106, a power supply circuit 107, and a display 108. The components are interconnected by a data bus 109. The communication IF 105 is an interface for communicating with other devices.

[0033] The processing in the server of the hydrogen supply system 100 is realized by each piece of hardware and a program Pg executed by the processor 101. Such a program Pg is pre-stored in the HDD 104. However, the program Pg may also be stored in other storage media and distributed as a program product. Alternatively, the program Pg may be provided as a downloadable program product by an information provider connected to the Internet. Such a program Pg is read from the storage medium by a reading device or downloaded via the communication IF 105 or the like, and then stored in the HDD 104. The processor 101 reads the program Pg from the HDD 104 and executes the program Pg.

[0034] Figure 3 is a diagram showing a flowchart illustrating the flow of processing carried out at each sampling time by each of the environmental value distribution server 140, the environmental value accumulating server 120, and the certificate transaction server 130 of Figure 1. The processing shown in Figure 3 is executed by a main routine (not shown) that comprehensively controls each of the environmental value distribution server 140, the environmental value accumulating server 120, and the certificate transaction server 130. Below, steps will simply be abbreviated as S.

[0035] 3, in S101, the environmental value distribution server 140 determines whether the production amount A of green hydrogen is greater than 0. If the production amount A of green hydrogen is 0 (NO in S101), the environmental value distribution server 140 returns the process to the main routine of the environmental value distribution server 140. If the production amount A of green hydrogen is greater than 0 (YES in S101), the environmental value distribution server 140 sends, in S102, to the environmental value aggregation server 120 an instruction to certify the environmental value that will be generated when the production amount A of green hydrogen is consumed by consumers, and proceeds to the process in S103. In S103, the environmental value distribution server 140 waits until it receives income information for the CO2 reduction certificate from the certificate trading server 130.

[0036] In S201, the environmental value aggregating server 120 determines whether or not it has received an instruction to certify the environmental value from the environmental value distribution server 140. If it has not received an instruction to certify the environmental value from the environmental value distribution server 140 (NO in S201), the environmental value aggregating server 120 returns the process to the main routine of the environmental value aggregating server 120. If it has received an instruction to certify the environmental value from the environmental value distribution server 140 (YES in S201), the environmental value aggregating server 120 calculates the amount of CO2 reduction in S202 and proceeds to the process in S203. In S203, the environmental value aggregating server 120 sends an application for certifying the amount of CO2 reduction to the authentication server 400 and proceeds to the process in S204. In S204, the environmental value aggregating server 120 waits until it receives a CO2 reduction certificate from the authentication server 400. The environmental value aggregating server 120 proceeds to S205 in response to receiving the CO2 reduction certificate from the authentication server 400. In S205, the environmental value aggregating server 120 transmits the CO2 reduction certificate to the certificate trading server 130 and returns the process to the main routine of the environmental value aggregating server 120.

[0037] In S301, the certificate transaction server 130 determines whether or not a CO2 reduction certificate has been received from the environmental value aggregating server 120. If a CO2 reduction certificate has not been received from the environmental value aggregating server 120 (NO in S301), the certificate transaction server 130 returns the process to the main routine of the certificate transaction server 130. If a CO2 reduction certificate has been received from the environmental value aggregating server 120 (YES in S301), the certificate transaction server 130 transmits the CO2 reduction certificate to the external certificate transaction server 500 in S302 and proceeds to S303. In S303, the certificate transaction server 130 waits until it receives a notification of completion of payment for the CO2 reduction certificate from the external certificate transaction server 500. In response to receiving the notification of completion of payment for the CO2 reduction certificate from the external certificate transaction server 500, the certificate transaction server 130 proceeds to S304. In S304, the certificate transaction server 130 transmits the income information from the sale of the CO2 reduction certificate to the environmental value distribution server 140, and returns the process to the main routine of the certificate transaction server 130.

[0038] The environmental value distribution server 140, which is on standby in S103, advances the process to S104 in response to receiving the income information from the certificate trading server 130. In S104, the environmental value distribution server 140 transmits the sales price data required to discount the sales price of green hydrogen from the usual price based on the income information to the hydrogen trading server 114, and returns the process to the main routine of the environmental value distribution server 140.

[0039] As described above, according to the hydrogen supply system, method, and program of the first embodiment, the environmental value associated with the consumption of green hydrogen can be returned to consumers in the form of a discount on the sales price of green hydrogen.

[0040] [Embodiment 2] In the first embodiment, we have described a configuration in which the environmental value associated with the consumption of green hydrogen is returned to consumers in the form of a discount on the sales price of green hydrogen. In the second embodiment, we will describe a configuration in which the environmental value associated with the consumption of green hydrogen is returned to consumers in the form of common points that are substitutable for cash.

[0041] Fig. 4 is a block diagram showing the configuration of a hydrogen supply system 100A according to embodiment 2. In the configuration of the hydrogen supply system 100A, the hydrogen trading server 114 and the environmental value distribution server 140 in Fig. 1 are replaced with a hydrogen trading server 114A and an environmental value distribution server 140A, respectively, and a management server 150 is added. Other than this, the configuration of the hydrogen supply system 100A is the same as that of the hydrogen supply system 100, and therefore a description of the similar configuration will not be repeated.

[0042] The management server 150 tracks the transfer of carbon-free hydrogen from the hydrogen production device 110 to the hydrogen supply device 310. Tracking the transfer of carbon-free hydrogen by the management server 150 also enables swap transactions of carbon-free hydrogen.

[0043] The environmental value distribution server 140A deducts expenses based on a predetermined profit rate from the transaction revenue of the CO2 reduction certificate, and uses the remaining transaction revenue to output point conversion data (distribution information) necessary to award common points to purchasers according to the amount of green hydrogen purchased to the hydrogen trading server 114A. The hydrogen trading server 114A then instructs the hydrogen trading server 114A to award common points to purchasers of green hydrogen based on the point conversion data. The hydrogen trading server 114A awards common points to purchasers of green hydrogen according to the amount of green hydrogen purchased based on the point conversion data from the environmental value distribution server 140A, thereby reflecting the distribution of revenue from the certificate transaction according to the amount of green hydrogen purchased in the invoice to the consumer. Note that the invoice to the consumer and the awarding of common points do not necessarily have to be made at the same time; the common points may be awarded after the settlement associated with the invoice to the consumer has been made.

[0044] Fig. 5 is a diagram showing a flowchart showing the flow of processing carried out at each sampling time by each of the environmental value distribution server 140A, the environmental value aggregation server 120, and the certificate transaction server 130 of Fig. 4. The flowchart shown in Fig. 5 is a flowchart in which S104 shown in Fig. 3 has been replaced with S104A. Other processing shown in Fig. 5 is similar to the processing shown in Fig. 3, and therefore description of similar processing will not be repeated.

[0045] As shown in Figure 5, after the environmental value distribution server 140A, the environmental value aggregation server 120, and the certificate trading server 130 each perform processing similar to that shown in Figure 3, in S104A, the environmental value distribution server 140A sends to the hydrogen trading server 114A the point conversion data required to award the purchaser common points according to the amount of green hydrogen purchased, and returns processing to the main routine of the environmental value distribution server 140A.

[0046] As described above, according to the hydrogen supply system, method, and program of embodiment 2, the environmental value associated with the consumption of green hydrogen can be returned to consumers in the form of common points that are interchangeable with cash.

[0047] The embodiments disclosed herein are intended to be combined appropriately within the scope of compatibility. The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present disclosure is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0048] 100,100A Hydrogen supply system, 101 Processor, 102 ROM, 103 RAM, 104 HDD, 105 Communication IF, 106 Operation keys, 107 Power supply circuit, 108 Display, 109 Data bus, 110 Hydrogen production device, 111 Power metering device, 112 Hydrogen metering device, 114,114A Hydrogen trading server, 120 Environmental value aggregation server, 130,500 Certificate trading server, 140,140A Environmental value distribution server, 150 Management server, 200 Power generation company, 300 Hydrogen station, 310 Hydrogen supply device, 320 Payment system, 400 Authentication server, 600 Hydrogen vehicle, Pg program.

Claims

1. A hydrogen supply system that supplies hydrogen to a consumer, comprising: a hydrogen production device that produces the hydrogen by electrolyzing water using renewable energy electricity; a hydrogen trading server that bills the consumer according to the amount of hydrogen purchased from the hydrogen supply system; an environmental value aggregation server that calculates the amount of carbon dioxide reduction achieved in the production of hydrogen by multiplying the amount of electricity from the renewable energy used in the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels, and applies to an authentication server for the issuance of a certificate certifying the amount of carbon dioxide reduction; a certificate transaction server that generates revenue information regarding revenue earned by selling said certificates; an environmental value distribution server that uses the income information and the amount of hydrogen produced corresponding to the amount of electricity to output to the hydrogen trading server distribution information necessary for distributing the income according to the amount of purchase, The hydrogen trading server reflects the distribution in the bill based on the distribution information.

2. the distribution information includes sales price data for reducing a standard charge amount according to the purchase amount based on the distribution; The hydrogen supply system according to claim 1 , wherein the hydrogen trading server determines a billing amount according to the purchase amount based on the sales price data.

3. the distribution information includes point conversion data for converting the purchase amount into common points, The hydrogen supply system according to claim 1 , wherein the hydrogen trading server provides the consumer with the common points according to the purchase amount based on the point conversion data.

4. 1. A method carried out in a hydrogen supply system that supplies hydrogen to a consumer, comprising: producing the hydrogen by electrolyzing water using renewable energy electricity; billing the consumer according to the amount of hydrogen purchased from the hydrogen supply system; Calculating the amount of carbon dioxide reduced in the production of hydrogen by multiplying the amount of electricity of the renewable energy electricity used in the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using fossil fuels; applying to an authentication server for issuance of a certificate that certifies the carbon dioxide reduction amount; generating revenue information regarding revenue earned from selling said certificates; a step of outputting distribution information necessary for distributing the income according to the purchase amount using the income information and the production amount of the hydrogen corresponding to the amount of electricity; and reflecting said distribution in said billing based on said distribution information.

5. At least one program executed in a hydrogen supply system that supplies hydrogen to a consumer, the program comprising: The hydrogen is produced by electrolyzing water using renewable energy electricity; The at least one program, when executed by a processor, billing the consumer according to the amount of hydrogen purchased from the hydrogen supply system; Calculate the amount of carbon dioxide reduction achieved in the production of hydrogen by multiplying the amount of electricity of the renewable energy electricity used in the electrolysis by the amount of carbon dioxide contained in a unit amount of electricity generated using a fossil fuel; Apply to an authentication server for the issuance of a certificate that certifies the amount of carbon dioxide reduction; generating revenue information regarding revenue earned from selling said certificates; outputting distribution information necessary for distributing the income according to the purchase amount using the income information and the production amount of the hydrogen corresponding to the amount of electricity; A program that reflects the distribution in the invoice based on the distribution information.

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