Driving assistance methods, driving assistance devices, and computer programs

Abstract

This invention provides an operation support method that assists the operation of a cogeneration system by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system. [Solution] The operation support method supports the operation of a cogeneration system 20 that generates electricity and heat using multiple energy sources as fuel. The operation support method includes calculating a control value for the cogeneration system 20 that maximizes the profit obtained by operating the cogeneration system 20, based on information about energy sources including the purchase price, heat quantity, and environmental value index of each energy source, and sales price information including the sales price of heat, the sales price of electricity, and the sales price of environmental value, and outputting the control value that maximizes the profit.

Description

[Technical Field]

[0001] This disclosure relates to a driver assistance method, a driver assistance device, and a computer program. [Background technology]

[0002] Patent Document 1 discloses a cogeneration system. The cogeneration system in Patent Document 1 comprises a gas turbine and a gas engine, and a control means. The control means controls the output of the gas turbine and the gas engine based on cost factors such as gas fuel charges. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2019-157639 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, while the cogeneration system described in Patent Document 1 takes into account the cost of gas fuel to control the output of the gas turbine and gas engine, it does not take into account the environmental value of the gas fuel.

[0005] The purpose of this disclosure is to provide an operation support device, an operation support method, and a computer program that support the operation of a cogeneration system by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system. [Means for solving the problem]

[0006] The operation support method relating to this disclosure is an operation support method for supporting the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, and includes calculating a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system, based on information about the energy sources, including the purchase price, heat quantity, and environmental value index of each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, and outputting the control value.

[0007] The operation support device according to this disclosure is an operation support device that supports the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, and comprises: a storage unit that stores information about the energy sources, including the purchase price, heat quantity, and environmental value index of each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value; a processing unit that calculates a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system based on the information about the energy sources and the sales price information; and an output unit that outputs the control value.

[0008] The computer program relating to this disclosure is a computer program that supports the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, and causes the computer to function to calculate a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system, based on information about the energy sources, including the purchase price, heat quantity, and environmental value index of each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, and to output the control value. [Effects of the Invention]

[0009] According to the driver assistance device, driver assistance method, and computer program described herein, it is possible to support the operation of a cogeneration system by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows a driver assistance device and a cogeneration system according to an embodiment of the present disclosure. [Figure 2] This figure shows the flow of a first process executed by a processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 3] This diagram shows the flow of the control value calculation process performed by the processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 4] This diagram shows the flow of the output processing of control values ​​performed by the processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 5] This figure shows a table stored in a memory unit included in a driver assistance device according to an embodiment of this disclosure. [Figure 6] This diagram shows the relationship between the amount of CO2 reduced and green value-added sales. [Figure 7] This figure shows the output information output by the processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 8] This figure shows the flow of a second process executed by a processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 9] This diagram shows the flow of a third process performed by a processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 10] This diagram shows the flow of a fourth process performed by a processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 11] This diagram shows the flow of the fifth process performed by the processing unit included in the driver assistance device according to the embodiment of this disclosure. [Figure 12]It is a diagram showing the flow of the sixth process executed by a processing unit included in an operation support device according to an embodiment of the present disclosure.

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of an operation support device, an operation support method, and a computer program according to the present disclosure will be described with reference to the drawings (FIGS. 1 to 12). However, the present disclosure is not limited to the following embodiments, and can be implemented in various aspects without departing from the gist thereof. Note that descriptions of overlapping parts may be omitted as appropriate. Also, in the drawings, the same or corresponding parts are denoted by the same reference numerals and the description will not be repeated.

[0012] FIG. 1 is a diagram showing an operation support device 100 and a cogeneration system 20 according to the present embodiment. First, the cogeneration system 20 will be described with reference to FIG. 1. The cogeneration system 20 generates electric power and heat using a plurality of energy sources as fuel. In the present embodiment, as shown in FIG. 1, the cogeneration system 20 is installed in a factory 40. Also, in the present embodiment, the cogeneration system 20 includes an operation instruction device 21, a cogeneration device 22, a first auxiliary device 23, a second auxiliary device 24, a hydrogen tank 41, an LNG tank 42, a hydrogen supply pipe 44, an LNG supply pipe 45, flow rate adjustment valves 44a and 44b, flow rate adjustment valves 45a and 45b, and a flow rate adjustment valve 46a.

[0013] The operation instruction device 21 communicates with the cogeneration device 22. The operation instruction device 21 transmits various control values ​​to the cogeneration device 22. Similarly, the operation instruction device 21 communicates with the first auxiliary device 23 and the second auxiliary device 24. The operation instruction device 21 transmits corresponding various control values ​​to the first auxiliary device 23 and the second auxiliary device 24, respectively. The operation instruction device 21 may be, for example, a computer. For example, the operation instruction device 21 may be a workstation. Alternatively, the operation instruction device 21 may be a control device such as a control panel or a programmable controller.

[0014] The cogeneration device 22 generates electricity and heat using multiple energy sources as fuel. Specifically, the cogeneration device 22 includes a gas turbine 221, a waste heat boiler 222, and a first control device 223. The first control device 223 is an example of a "control device that controls the cogeneration system 20 based on control values."

[0015] The gas turbine 221 generates electricity and heat. More specifically, the gas turbine 221 has a combustion chamber and a turbine. Fuel is supplied to the combustion chamber. The gas turbine 221 burns the fuel in the combustion chamber. As a result, a high-temperature, high-pressure gas is generated in the combustion chamber. In this embodiment, multiple energy sources are supplied to the combustion chamber as fuel. The gas turbine 221 burns the multiple energy sources in the combustion chamber.

[0016] High-temperature, high-pressure gas is sent from the combustion chamber to the turbine. The turbine rotates using the high-temperature, high-pressure gas sent from the combustion chamber to the turbine, generating electricity. The electricity generated by the gas turbine 221 is sold to the power company. Specifically, the electricity generated by the gas turbine 221 is supplied to the commercial power grid.

[0017] The high-temperature, high-pressure gas (exhaust gas) remaining after rotating the turbine is sent to the waste heat boiler 222. In other words, heat is transferred from the turbine to the waste heat boiler 222. The waste heat boiler 222 recovers the heat contained in the exhaust gas and generates steam. The exhaust gas, after being used to generate steam, is discharged from the waste heat boiler 222.

[0018] More specifically, the waste heat boiler 222 has a feedwater piping. Water is supplied to the feedwater piping. The water flowing through the feedwater piping is heated by the high-temperature, high-pressure gas (exhaust gas) after the turbine has been rotated. As a result, steam is generated from the water flowing through the feedwater piping. The steam is supplied from the feedwater piping to the steam supply piping 46 laid in the factory 40.

[0019] The steam supply piping 46 circulates steam to multiple steam-consuming equipment 43 installed in the factory 40. These multiple steam-consuming equipment 43 may include, for example, heating equipment and hot water supply equipment. The multiple steam-consuming equipment 43 may also include production lines that utilize heat.

[0020] In this embodiment, the multiple energy sources include multiple types of energy sources. Therefore, the gas turbine 221 co-fires multiple types of energy sources in the combustion chamber. Specifically, the multiple types of energy sources include hydrogen and liquefied natural gas (LNG). Therefore, the gas turbine 221 co-fires hydrogen and liquefied natural gas in the combustion chamber. Hereinafter, liquefied natural gas may be referred to as "LNG".

[0021] More specifically, hydrogen is supplied from hydrogen tank 41 to the combustion chamber of gas turbine 221 via hydrogen supply piping 44. LNG is supplied from LNG tank 42 to the combustion chamber of gas turbine 221 via LNG supply piping 45.

[0022] In this embodiment, the multiple energy sources further include multiple energy sources of the same type. Specifically, the multiple energy sources may include multiple LNGs that are different from each other. Also, the multiple energy sources may include multiple hydrogens that are different from each other. The multiple LNGs may be stored in different LNG tanks 42, or they may be stored in one LNG tank 42. Similarly, the multiple hydrogens may be stored in different hydrogen tanks 41, or they may be stored in one hydrogen tank 41.

[0023] More specifically, multiple energy sources of the same type include multiple energy sources of the same type that originate from different sources. For example, multiple energy sources of the same type that originate from different sources include LNG that originates from different locations. Furthermore, multiple energy sources of the same type that originate from different sources may include, for example, hydrogen produced by water electrolysis using electricity derived from renewable energy, hydrogen produced by water electrolysis using electricity derived from fossil fuels, hydrogen derived from fossil fuels such as lignite in which carbon dioxide emitted during the hydrogen production process is recovered, and hydrogen derived from fossil fuels such as lignite in which carbon dioxide emitted during the hydrogen production process is not recovered.

[0024] Furthermore, multiple energy sources of the same type include multiple energy sources of the same type that have different values ​​for their environmental value indicators. The environmental value indicator shows the amount of greenhouse gases (GHGs) emitted from the time the energy source is manufactured until it is used as fuel. Greenhouse gas emissions increase from the time the energy source is manufactured until it is used as fuel. Hereafter, greenhouse gas emissions may be referred to as "GHG emissions."

[0025] For example, hydrogen is sold to a business that owns a cogeneration system 20 via multiple supply chain operators. For example, hydrogen is produced by a hydrogen manufacturer and then converted into liquefied hydrogen by a liquefied hydrogen manufacturer. The liquefied hydrogen is stored at a base by a base operator or transported by a transport operator. The liquefied hydrogen is transported by ships, vehicles or rail, etc. Therefore, greenhouse gases related to hydrogen include greenhouse gases related to hydrogen production, greenhouse gases related to hydrogen liquefaction, greenhouse gases related to the storage of liquefied hydrogen, and greenhouse gases related to the transportation of liquefied hydrogen. Note that a hydrogen manufacturer may also be a liquefied hydrogen manufacturer.

[0026] GHG emissions related to hydrogen production are calculated based on the activity level of the hydrogen production plant or facility. This activity level includes, for example, the consumption of electricity transmitted from the power grid. If fuel is used in hydrogen production, the activity level of the hydrogen production plant or facility includes the amount of fuel used. If waste disposal is required as a result of hydrogen production, the activity level of the hydrogen production plant or facility includes the amount of waste disposed of. Similarly, GHG emissions related to hydrogen liquefaction are calculated based on the activity level of the hydrogen liquefaction plant or facility. GHG emissions related to the storage of liquefied hydrogen are calculated based on the activity level of the storage base. GHG emissions related to the transportation of liquefied hydrogen are calculated based on the activity level of transport ships, vehicles, or railways. Note that hydrogen with low greenhouse gas emissions related to its production is sometimes referred to as "low-carbon hydrogen."

[0027] Similar to hydrogen, LNG is sold to operators who own cogeneration systems 20 via multiple supply chain operators. Specifically, natural gas is first extracted by extraction operators. Then, natural gas is converted into LNG by LNG manufacturers. LNG is stored at terminals by terminal operators or transported by transport operators. Like liquefied hydrogen, LNG is transported by ships, vehicles or rail, etc. Therefore, greenhouse gas emissions related to LNG include greenhouse gases related to natural gas extraction, greenhouse gases related to natural gas liquefaction, greenhouse gases related to LNG storage, and greenhouse gases related to LNG transportation. Greenhouse gas emissions related to LNG are calculated based on the activity levels of each supply chain operator, similar to greenhouse gas emissions related to hydrogen.

[0028] It should be noted that even if the energy source originates from the same source, the environmental value index may differ. For example, even with the same low-carbon hydrogen, the environmental value index may differ due to differences in origin, manufacturing facilities, manufacturing period, transportation methods, etc. For instance, low-carbon hydrogen includes hydrogen derived from geothermal power, nuclear power, solar power, and wind power. Therefore, even with the same low-carbon hydrogen, the environmental value index may differ due to differences in manufacturing facilities. Furthermore, even with hydrogen derived from solar power, the environmental value index may differ due to differences in the type and performance of the solar power generation equipment, etc.

[0029] The operation instruction device 21 transmits a first control value to the first control device 223. Based on the first control value transmitted from the operation instruction device 21, the first control device 223 controls the gas turbine 221 and the waste heat boiler 222. Specifically, the first control value includes the energy source ratio and the electric heat ratio. The energy source ratio and the electric heat ratio are examples of "control values ​​for the gas turbine 221".

[0030] The energy source ratio indicates the ratio of multiple energy sources used to generate electricity and heat by the cogeneration system 20. For example, the energy source ratio includes the ratio of the multiple types of energy sources mentioned above. Specifically, the energy source ratio indicates the ratio of the amounts of multiple energy sources. In this embodiment, the energy source ratio includes the ratio of the amounts of hydrogen and LNG supplied to the gas turbine 221.

[0031] The first control device 223 controls the amount of each of the multiple energy sources supplied to the gas turbine 221 based on the energy source ratio. In this embodiment, the first control device 223 controls the amount of hydrogen and LNG supplied to the gas turbine 221. Specifically, the first control device 223 may control the flow rate of hydrogen and the flow rate of LNG supplied to the gas turbine 221. The flow rate may represent the volume of gas flowing per unit time. For example, the first control device 223 may control the amount of hydrogen and the amount of LNG supplied to the gas turbine 221 by controlling the flow control valve 44a provided in the hydrogen supply pipe 44 and the flow control valve 45a provided in the LNG supply pipe 45 based on the energy source ratio. A flow control valve is a valve that adjusts the flow rate of gas flowing through the pipe. For example, the flow control valve may have an adjustable opening. Specifically, the flow control valve may be a solenoid valve.

[0032] The electricity-heat ratio indicates the ratio of the amount of electricity generated by the cogeneration system 20 to the amount of heat energy recovered by the cogeneration system 20. Specifically, the electricity-heat ratio indicates the ratio of the amount of electricity generated by the gas turbine 221 to the amount of heat energy recovered from the exhaust gas in the waste heat boiler 222. Hereinafter, the electricity generated by the gas turbine 221 may be referred to as "generated electricity." Also, the amount of heat energy recovered from the exhaust gas in the waste heat boiler 222 may be referred to as "recovered heat energy."

[0033] The first control device 223 controls the heat recovery efficiency of the cogeneration device 22 based on the electricity-heat ratio. The heat recovery efficiency represents the ratio of the amount of recovered thermal energy to the amount of energy (heat) of the fuel supplied to the gas turbine 221.

[0034] Specifically, the heat recovery efficiency can be controlled by adjusting the amount of fuel supplied to the gas turbine 221. Alternatively, the heat recovery efficiency can be controlled by adjusting the load on the gas turbine 221. For example, the first control device 223 may adjust the amount of fuel supplied to the gas turbine 221 by controlling the flow rates of hydrogen and LNG supplied to the gas turbine 221.

[0035] In this embodiment, the first control value further includes the control value of the waste heat boiler 222. The control value of the waste heat boiler 222 includes a first set value, which is a set value for the amount of steam to be generated in the waste heat boiler 222. The first set value may indicate the flow rate of steam flowing from the feedwater pipe to the steam supply pipe 46. The first control device 223 may control the amount of steam generated in the waste heat boiler 222 by adjusting the flow rate of water supplied to the feedwater pipe provided in the waste heat boiler 222 based on the first set value. For example, the first control device 223 may adjust the amount of steam generated in the waste heat boiler 222 by controlling a flow control valve provided in the feedwater pipe.

[0036] The first control device 223 may be, for example, a computer. For example, the first control device 223 may be a workstation. Alternatively, the first control device 223 may be a control panel or a control device such as a programmable controller.

[0037] Next, the first auxiliary device 23 will be described. The first auxiliary device 23 generates steam. The steam generated by the first auxiliary device 23 is supplied to the steam supply pipe 46. Specifically, the operation instruction device 21 activates the first auxiliary device 23 when the amount of steam supplied from the cogeneration device 22 (waste heat boiler 222) is less than the amount of steam consumed by the multiple steam consumption devices 43 (steam demand).

[0038] Specifically, the first auxiliary device 23 includes an auxiliary boiler 231 and a second control device 232. The auxiliary boiler 231 generates steam by burning fuel. The auxiliary boiler 231 may generate steam using multiple types of energy sources as fuel, similar to the cogeneration device 22. In this embodiment, the auxiliary boiler 231 uses hydrogen stored in the hydrogen tank 41 and LNG stored in the LNG tank 42 as fuel. In other words, the auxiliary boiler 231 generates steam by co-firing hydrogen and LNG.

[0039] The operation instruction device 21 transmits a second control value to the second control device 232. The second control device 232 operates the auxiliary boiler 231 at its rated capacity based on the second control value transmitted from the operation instruction device 21. The second control value includes an operation start instruction and an operation stop instruction. Based on the operation start instruction, the second control device 232 starts the operation of the auxiliary boiler 231. Based on the operation stop instruction, the second control device 232 stops the operation of the auxiliary boiler 231. The second control device 232 is an example of a "control device that controls the cogeneration system 20 based on control values".

[0040] More specifically, the hydrogen supply piping 44 is provided with an on-off valve (not shown) that controls the flow of hydrogen to the auxiliary boiler 231. Similarly, the LNG supply piping 45 is provided with an on-off valve (not shown) that controls the flow of LNG to the auxiliary boiler 231. When starting the operation of the auxiliary boiler 231, the second control device 232 transitions the two on-off valves (not shown) from the closed state to the open state. Also, when stopping the operation of the auxiliary boiler 231, the second control device 232 transitions the two on-off valves (not shown) from the open state to the closed state.

[0041] In this embodiment, the second control value includes the energy source ratio. The second control device 232 controls the amount of hydrogen and LNG supplied to the auxiliary boiler 231 based on the energy source ratio, similar to the first control device 223. For example, the second control device 232 may control the amount of hydrogen and LNG supplied to the auxiliary boiler 231 by controlling the flow control valve 44b provided in the hydrogen supply pipe 44 and the flow control valve 45b provided in the LNG supply pipe 45.

[0042] The second control device 232 may be, for example, a computer. For example, the second control device 232 may be a workstation. Alternatively, the second control device 232 may be a control panel or a control device such as a programmable controller.

[0043] Next, the second auxiliary device 24 will be explained. The second auxiliary device 24 generates electricity using steam. If the amount of steam supplied from the cogeneration device 22 (waste heat boiler 222) is greater than the amount of steam consumed by the multiple steam consumption devices 43 (steam demand), the operation instruction device 21 will circulate the excess steam to the second auxiliary device 24.

[0044] Specifically, the second auxiliary device 24 includes a steam turbine 241 and a third control device 242. Steam is supplied to the steam turbine 241 from a steam supply pipe 46. The steam turbine 241 generates electricity using the steam. More specifically, the steam turbine 241 rotates using the steam supplied from the steam supply pipe 46 to generate electricity. The electricity generated by the steam turbine 241 is sold to the power company. Specifically, the electricity generated by the steam turbine 241 is supplied to the commercial power grid.

[0045] The operation instruction device 21 transmits a third control value to the third control device 242. The third control device 242 operates the steam turbine 241 at its rated capacity based on the third control value transmitted from the operation instruction device 21. The third control value includes an operation start instruction and an operation stop instruction. Based on the operation start instruction, the third control device 242 starts the operation of the steam turbine 241. Based on the operation stop instruction, the third control device 242 stops the operation of the steam turbine 241. The third control device 242 is an example of a "control device that controls the cogeneration system 20 based on a control value".

[0046] More specifically, the steam supply piping 46 is provided with an on-off valve (not shown) that controls the flow of steam to the steam turbine 241. When starting the operation of the steam turbine 241, the third control device 242 transitions the on-off valve (not shown) from a closed state to an open state to start supplying steam to the steam turbine 241. Also, when stopping the operation of the steam turbine 241, the third control device 242 transitions the on-off valve (not shown) from an open state to a closed state to stop supplying steam to the steam turbine 241.

[0047] In this embodiment, the third control value further includes a second setting value, which is the set value for the flow rate of steam supplied to the steam turbine 241. The third control device 242 controls the flow rate of steam supplied to the steam turbine 241 based on the second setting value. Specifically, a flow control valve 46a is provided in the steam supply piping 46. The flow control valve 46a is a valve that adjusts the flow rate of steam flowing from the steam supply piping 46 to the steam turbine 241. The third control device 242 controls the flow control valve 46a based on the second setting value to adjust the flow rate of steam supplied to the steam turbine 241.

[0048] The third control device 242 may be, for example, a computer. For example, the third control device 242 may be a workstation. Alternatively, the third control device 242 may be a control panel or a control device such as a programmable controller.

[0049] Next, with reference to Figure 1, the driver assistance device 100 of this embodiment will be described. The driver assistance device 100 assists in the operation of the cogeneration system 20. The driver assistance device 100 may be, for example, a computer. For example, the driver assistance device 100 may be a workstation. As shown in Figure 1, the driver assistance device 100 includes a communication unit 11, an input unit 12, a display unit 13, a processing unit 14, and a storage unit 15.

[0050] In this embodiment, the business operator that owns the cogeneration system 20 also owns the operation support device 100. The business operator that owns the cogeneration system 20 includes a business operator that generates electricity and heat (steam) using the cogeneration system 20 and sells the generated electricity and heat (steam) to electricity consumers and heat consumers, respectively. In this embodiment, the business operator that owns the cogeneration system 20 sells electricity to an electric power company and sells heat (steam) to a business operator that owns the factory 40. Hereinafter, the business operator that owns the cogeneration system 20 may be referred to as the "cogeneration business operator".

[0051] The communication unit 11 communicates with the operation instruction device 21. The communication unit 11 transmits the aforementioned first control value, second control value, and third control value to the operation instruction device 21. The communication unit 11 is an example of an "output unit that outputs control values". The operation instruction device 21 transmits the first control value, second control value, and third control value received from the communication unit 11 to the first control device 223, the second control device 232, and the third control device 242, respectively. Therefore, the communication unit 11 transmits the first control value, second control value, and third control value to the first control device 223, the second control device 232, and the third control device 242, respectively, via the operation instruction device 21.

[0052] The communication unit 11 further communicates with the hydrogen management device 30. The hydrogen management device 30 manages information about multiple hydrogens. The communication unit 11 obtains information about each hydrogen managed by the hydrogen management device 30 from the hydrogen management device 30. The information about each hydrogen is input from the communication unit 11 to the processing unit 14. As a result, the processing unit 14 obtains information about each hydrogen.

[0053] The hydrogen management device 30 may include, for example, a server and a terminal device for managing the information recorded on the server. The information regarding each hydrogen includes information about the owner of each hydrogen, information about the origin of each hydrogen, an index value of the environmental value of each hydrogen, the selling price of each hydrogen, and the calorific value (energy amount) of the hydrogen.

[0054] Specifically, the hydrogen management device 30 obtains information on the sale and purchase of hydrogen from each supply chain supplier and obtains information on the hydrogen owner. Furthermore, the hydrogen management device 30 obtains information on the origin of hydrogen from the hydrogen manufacturer. The hydrogen management device 30 also obtains activity level information from each supply chain supplier and calculates GHG emissions. The hydrogen management device 30 also obtains the unit price for selling hydrogen from each supply chain supplier. The unit price for selling hydrogen may, for example, represent the price per unit volume of hydrogen. The calorific value of hydrogen is a constant value and is entered into the hydrogen management device 30 by the operator managing the hydrogen management device 30.

[0055] Cogeneration operators purchase hydrogen from one of their supply chain providers. For example, a cogeneration operator purchases liquefied hydrogen from a hydrogen reservoir operator. Therefore, the selling price from the hydrogen reservoir operator corresponds to the purchase price of hydrogen (liquefied hydrogen) when the cogeneration operator purchases it from the hydrogen reservoir operator. Hereinafter, the selling price obtained by the operation support device 100 from the hydrogen management device 30 may be referred to as the "purchase price."

[0056] The communication between the communication unit 11 and the operation instruction device 21 may be conducted via, for example, wired communication or wireless communication. Furthermore, the communication between the communication unit 11 and the operation instruction device 21 may be conducted via a local area network (LAN), a public wide-area communication network, or a dedicated wide-area communication network. Similarly, the communication between the communication unit 11 and the hydrogen management device 30 may be conducted via, for example, wired communication or wireless communication. Furthermore, the communication between the communication unit 11 and the hydrogen management device 30 may be conducted via a LAN, a public wide-area communication network, or a dedicated wide-area communication network. The communication unit 11 includes a communication circuit. For example, the communication unit 11 may include a LAN adapter compliant with a LAN communication protocol.

[0057] The input unit 12 is a man-machine interface device operated by an operator managing the driver assistance device 100. The input unit 12 may have, for example, a keyboard and a mouse. The input unit 12 may also have a touch sensor. The touch sensor may be superimposed on the display surface of the display unit 13. In this case, the touch sensor and the display unit 13 may constitute a graphical user interface. Hereinafter, the operator managing the driver assistance device 100 may be referred to as the "driver assistance operator".

[0058] The input unit 12 inputs various information or data to the processing unit 14 in response to the operation of the driver assistance operator. Specifically, the input unit 12 is operated by the driver assistance operator to input the sale price information to the processing unit 14. As a result, the processing unit 14 acquires the sale price information.

[0059] The sales price information includes the unit price for selling electricity, the unit price for selling heat (steam), and the unit price for selling environmental value. In this embodiment, the unit price for selling electricity indicates the unit price at which the cogeneration operator sells electricity to the power company (electricity consumer). The unit price for selling heat (steam) indicates the unit price at which the cogeneration operator sells heat (steam) to the owner of factory 40 (heat consumer).

[0060] Environmental value includes the environmental value of green electricity and the environmental value of green heat as green added value. The green added value is sold as certificates to purchasers of green added value by a green electricity certificate issuer and a green heat certificate issuer. As already explained, in this embodiment, the cogeneration system 20 generates electricity and heat by co-firing LNG and hydrogen. The electricity generated by co-firing LNG and hydrogen is green electricity. Similarly, the heat generated by co-firing LNG and hydrogen is green heat. Therefore, the cogeneration operator can transfer the green added value to the green electricity certificate issuer and the green heat certificate issuer.

[0061] In this embodiment, the input unit 12 is further operated by an operator to input information regarding the LNG used as fuel for the cogeneration system 20 to the processing unit 14. Therefore, the processing unit 14 acquires information regarding the LNG. This information includes the purchase price of the LNG, an index value of the environmental value of the LNG, information on the origin of the LNG (source information), and the calorific value of the LNG.

[0062] The display unit 13 is controlled by the processing unit 14 to display various screens. The display unit 13 includes display devices such as liquid crystal displays and organic electroluminescent (EL) displays. When a touch sensor is superimposed on the display surface of the display device, the display unit 13 functions as a touch panel.

[0063] For example, the display unit 13 displays information about each hydrogen atom acquired via the communication unit 11. As a result, information about each hydrogen atom is notified to the driver support operator. The display unit 13 also displays sales price information and other data entered via the input unit 12.

[0064] The display unit 13 further displays the aforementioned first control value. As a result, the first control value is notified to the driver support operator. Specifically, the display unit 13 displays the aforementioned energy source ratio and electric heat ratio. As a result, the energy source ratio and electric heat ratio are notified to the driver support operator. The display unit 13 may also further display the aforementioned second and third control values. The display unit 13 is an example of an "output unit that outputs control values".

[0065] The storage unit 15 has a storage device. Specifically, the storage unit 15 has a main memory. The main memory includes, for example, semiconductor memory. The storage unit 15 may further have an auxiliary storage device. The auxiliary storage device includes, for example, at least one of semiconductor memory and a hard disk drive. The storage unit 15 may also include removable media.

[0066] The memory unit 15 stores computer programs in advance. These computer programs include a driver assistance program 151. The driver assistance program 151 is a computer program for assisting the operation of the cogeneration system 20. The memory unit 15 also stores information acquired via the communication unit 11 and information acquired via the input unit 12. Specifically, the processing unit 14 causes the memory unit 15 to store the information input via the communication unit 11 and the information input via the input unit 12.

[0067] Specifically, the memory unit 15 stores information about multiple energy sources used as fuel for the cogeneration system 20, as well as sales price information. The information about multiple energy sources includes the purchase price, calorific value, environmental value index, and origin information for each energy source. The sales price information includes the sales price of heat, the sales price of electricity, and the sales price of environmental value. In this embodiment, the information about multiple energy sources includes the purchase price of hydrogen, the purchase price of LNG, the calorific value of hydrogen, the calorific value of LNG, the environmental value index of hydrogen, the environmental value index of LNG, the origin of hydrogen, and the origin of LNG. The sales price of environmental value includes the sales price of the green added value mentioned above. Note that the calorific value of LNG is not a constant value. For example, the calorific value of LNG varies depending on the origin of the natural gas.

[0068] The processing unit 14 executes computer programs stored in the memory unit 15 to perform various processes such as numerical calculations, information processing, and device control. The configuration in which the processing unit 14 executes computer programs stored in the memory unit 15 is one example of a processing circuit. For example, the processing unit 14 may have at least one of the following: a general-purpose processor, a dedicated processor, an integrated circuit, and an ASIC (Application Specific Integrated Circuits).

[0069] For example, the processing unit 14 executes the operation support program 151. As a result, the processing unit 14 calculates control values ​​for the cogeneration system 20 that maximize the profit obtained by operating the cogeneration system 20, based on information about multiple energy sources and sales price information. Hereinafter, the profit obtained by operating the cogeneration system 20 may be referred to as "operating profit of the cogeneration system 20". Also, the control values ​​for the cogeneration system 20 that maximize the profit obtained by operating the cogeneration system 20 may be referred to as "control values ​​that maximize profit". The control values ​​that maximize profit include the energy source ratio and the electric heat ratio that maximize profit.

[0070] Next, with reference to Figures 2 to 4, the first process executed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 2 is a diagram showing the flow of the first process executed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the storage unit 15 causes the processing unit 14 to function to execute the first process shown in Figure 2. In this embodiment, the driving support method is implemented when the processing unit 14 executes the first process. Therefore, Figure 2 shows the "driving support method" of this embodiment. As shown in Figure 2, the first process includes steps S1 to S3.

[0071] In step S1, the processing unit 14 acquires information on multiple energy sources and sales price information. Specifically, the processing unit 14 acquires information on each hydrogen from the hydrogen management device 30 by executing the operation support program 151. The processing unit 14 also executes the operation support program 151 to display an input screen on the display unit 13 for inputting information on LNG and sales price information. The operation support operator operates the input unit 12 to input information on LNG and sales price information into the input screen. As a result, the processing unit 14 acquires information on LNG and sales price information.

[0072] In step S2, the processing unit 14 calculates a control value that maximizes profit based on information about multiple energy sources and selling price information. In step S3, the processing unit 14 outputs the control value that maximizes profit.

[0073] Figure 3 is a diagram showing the flow of the control value calculation process (step S2 in Figure 2) performed by the processing unit 14 included in the driving support device 100 of this embodiment. As shown in Figure 3, in this embodiment, the process of determining the control value that maximizes profit by calculation (step S2 in Figure 2) includes the process of determining the energy source ratio and the electric heat ratio, as explained with reference to Figure 1 (step S21). Specifically, the processing unit 14 determines the energy source ratio and electric heat ratio that maximize profit by calculation based on information on multiple energy sources and selling price information.

[0074] Figure 4 is a diagram showing the flow of the control value output processing (step S3 in Figure 2) performed by the processing unit 14 included in the driving support device 100 of this embodiment. As shown in Figure 4, in this embodiment, the processing to output the control value (step S3 in Figure 2) includes steps S31 and S32.

[0075] In step S31, the processing unit 14 notifies the control value that maximizes profit. In this embodiment, the processing unit 14 displays the control value that maximizes profit on the display unit 13. Specifically, the processing unit 14 displays the energy source ratio and the electric heat ratio that maximize profit on the display unit 13.

[0076] In step S32, the processing unit 14 transmits control values ​​that maximize profit to the operation instruction device 21 via the communication unit 11. Specifically, the processing unit 14 transmits the energy source ratio and the electric heat ratio that maximize profit to the first control device 223 via the operation instruction device 21. The processing unit 14 may also transmit the control values ​​to the operation instruction device 21 in response to the operation of the input unit 12 by the operation support operator, or it may transmit the control values ​​to the operation instruction device 21 in response to the calculation of the control values.

[0077] Next, with reference to Figures 5 and 6, the process of calculating the energy source ratio and electric heat ratio that maximize profit (step S2 in Figure 2) will be described. Figure 5 shows a table 50 stored in the memory unit 15 included in the operation support device 100 of this embodiment. The processing unit 14 registers various information in the table 50 by referring to the information obtained from the hydrogen management device 30 and the information input by the input unit 12. As shown in Figure 5, the table 50 includes an identification number column, a gas type column, an origin information column, a unit price column, a CI value column, and a heat quantity column.

[0078] The processing unit 14 registers identification numbers in the identification number field to identify the multiple energy sources used as fuel for the cogeneration system 20. The processing unit 14 also registers the type of each energy source in the gas type field. In this embodiment, LNG or hydrogen is registered in the gas type field.

[0079] The processing unit 14 registers the origin information of each energy source in the origin information field. In this embodiment, the processing unit 14 registers the country of origin for LNG. The processing unit 14 also registers "Renewable energy / Water electrolysis" for hydrogen produced by water electrolysis using electricity derived from renewable energy, "Fossil fuel-derived electricity / Water electrolysis" for hydrogen produced by water electrolysis using electricity derived from fossil fuels, and "Lignite" for hydrogen derived from lignite.

[0080] The processing unit 14 registers the purchase price of each energy source in the unit price column. In this embodiment, the processing unit 14 registers the price per cubic meter (unit volume) of each energy source. The currency of the price is, for example, yen. "vi" indicates the purchase price of the energy source to which identification number i is assigned.

[0081] The processing unit 14 registers the GHG emissions per cubic meter (unit volume) of each energy source in the CI value field. In this embodiment, the processing unit 14 converts the GHG emissions to carbon dioxide emissions and calculates the carbon dioxide emissions per cubic meter (unit volume) of each energy source [kg / m³ 3Register the data. Carbon dioxide emissions are an example of an "environmental value indicator." "si" indicates the CI value of the energy source assigned identification number i.

[0082] The processing unit 14 enters the heat quantity in the heat quantity column, which is the heat quantity per cubic meter (unit volume) of each energy source [J / m³]. 3 Register ]. "qi" indicates the heat quantity of the energy source to which identification number i has been assigned.

[0083] The driver assistance program 151 includes the following equations (1) to (9). The processing unit 14 calculates control values ​​that maximize profit based on the following equations (1) to (9). Pr = Ph + Pe + wV ... (1)

[0084] In equation (1), "Pr" represents the operating profit of the cogeneration system 20. "Ph" represents heat sales. Heat sales Ph is the projected sales value of heat (steam) generated by the cogeneration system 20. "Pe" represents power generation sales. Power generation sales Pe is the projected sales value of electricity generated by the cogeneration system 20. "w" represents green value-added sales. Green value-added sales w is the projected sales value (profit from sale) of the aforementioned green value-added products. "V" represents the projected cost.

[0085] The heat sales Ph in equation (1) is calculated based on the following equations (2) to (4). Ph = ah × Qh ···(2) Qh = P × ηh ···(3)

[0086]

number

[0087] In equations (2) to (4), "ah" represents the unit price of selling heat (steam). "Qh" represents the amount of recovered thermal energy. "P" represents the output (energy amount) of the cogeneration device 22. Specifically, "P" represents the sum of the generated power and recovered thermal energy in the cogeneration device 22. "ηh" represents the heat recovery efficiency of the cogeneration device 22. "F" is the rated fuel volume flow rate [m³] of the gas turbine 221. 3 This indicates [ / s]. The rated fuel volume flow rate is a constant value (default value) and indicates the volume of fuel supplied to the gas turbine 221 per unit time. More specifically, the rated fuel volume flow rate indicates the volume flow rate of fuel supplied to the gas turbine 221 in order to operate the gas turbine 221 at its rated capacity. "xi" indicates the individual mixing ratio of the energy source assigned identification number i. "qi" indicates the heat quantity of the energy source assigned identification number i. The selling price ah is included in the selling price information mentioned above. The heat recovery efficiency ηh is a variable. The rated fuel volume flow rate F is entered by the operation support worker by operating the input unit 12. The heat quantity qi is registered in table 50. The individual mixing ratio xi is a variable.

[0088] The power generation revenue Pe in equation (1) is calculated based on equations (5) and (6) below, and equation (4) above. Pe = ae × Qe···(5) Qe = P × ηe ···(6)

[0089] In equations (5) and (6), "ae" represents the unit price at which electricity is sold. "Qe" represents the generated power. "P" represents the output (energy amount) of the cogeneration device 22. "ηe" represents the power generation efficiency of the cogeneration device 22. The unit price ae is included in the aforementioned sales price information. The power generation efficiency ηe is a constant value and is input by the operation support worker by operating the input unit 12. The power generation efficiency ηe represents the ratio of generated power to the energy amount (heat amount) of the fuel supplied to the gas turbine 221.

[0090] The green value-added sales w in equation (1) are calculated based on equations (7) and (8) below. w=α(c o-c)···(7)

[0091]

number

[0092] In equations (7) and (8), "α" represents the selling price per unit of green value added. o " indicates the standard carbon dioxide emissions. "c" indicates the carbon dioxide emissions. "F" is the rated fuel volume flow rate [m³] of the gas turbine 221. 3 [ / s] indicates. "xi" indicates the individual blending ratio of the energy source assigned identification number i. "si" indicates the CI value of the energy source assigned identification number i. "SCI" ​​indicates the amount of carbon dioxide emitted from the cogeneration system 20 (carbon dioxide emissions). Green value added selling price α, standard carbon dioxide emissions c o The rated fuel volume flow rate F and the value of "SCI" ​​are entered by the operator using the input unit 12. The individual mixing ratio xi is a variable. The CI value si is registered in Table 50.

[0093] The cost V in equation (1) is calculated based on equation (9) below.

[0094]

number

[0095] In equation (9), "F" is the rated fuel volume flow rate of the gas turbine 221 [m³ 3 This indicates [ / s]. "xi" indicates the individual mixing ratio of the energy source assigned identification number i. "vi" indicates the purchase price of the energy source assigned identification number i. "VFC" indicates fixed costs such as depreciation expenses. The rated fuel volume flow rate F and fixed costs VFC are entered by the operator using the input unit 12. The individual mixing ratio xi is a variable. The purchase price vi is registered in table 50.

[0096] The processing unit 14 searches for the values of the variables that maximize the operating profit Pr of the cogeneration system 20 based on the above equations (1) to (9). Specifically, the processing unit 14 searches for the value of the output P (energy amount) of the cogeneration system 20 that maximizes the operating profit Pr of the cogeneration system 20. By determining the value of the output P, the total amount of the energy source (fuel) input to the gas turbine 221 can be determined.

[0097] More specifically, the processing unit 14 searches for the values of the individual mixing ratio xi and the heat recovery efficiency ηh that maximize the operating profit Pr of the cogeneration system 20. For example, the processing unit 14 may search for the optimal values of the variables by a search algorithm such as a linear search, a binary search, or a hash method, or may search for the optimal values of the variables by an algorithm of a regression analysis method such as a lasso regression. Alternatively, the processing unit 14 may search for the values of the variables that maximize the operating profit Pr by changing the values of the variables and mapping the operating profit Pr.

[0098] Note that the range in which the individual mixing ratio xi of each energy source is variable is subject to the constraints of the amounts of each energy source stored in the hydrogen tank 41 and the LNG tank 42. The range in which the heat recovery efficiency ηh is variable is restricted to the range in which the cogeneration device 22 can be operated at its rated capacity.

[0099] Subsequently, referring to FIG. 6, the green added value sales w will be described. FIG. 6 is a diagram showing the relationship between the amount of CO2 reduction and the green added value sales w. In FIG. 6, the horizontal axis represents the amount of CO2 reduction. The vertical axis represents the green added value sales w. The slope α represents the selling unit price of the green added value. "c o " represents the standard emission amount of carbon dioxide.

[0100] The amount of CO2 reduction represents the value obtained by subtracting the amount of carbon dioxide emissions c calculated by the above equation (8) from the standard emission amount c of carbon dioxide. As shown in FIG. 6, when the amount of carbon dioxide emissions c calculated by the above equation (8) is the standard emission amount c of carbon dioxide o o ​If equal to the above, the value of green value-added sales w will be 0. The value of green value-added sales w is calculated by the carbon dioxide emissions c calculated by formula (8) above and the standard carbon dioxide emissions c o It increases as the value decreases.

[0101] Next, with reference to Figure 7, the control values ​​output by the processing unit 14 will be explained. As explained with reference to Figure 2, the processing unit 14 calculates the control value that maximizes profit and outputs the calculated control value (step S3). Figure 7 is a diagram showing the output information output by the processing unit 14 included in the driving support device 100 in this embodiment. As shown in Figure 7, in this embodiment, the processing unit 14 outputs first output information 61, second output information 62, and third output information 63.

[0102] The first output information 61 and the second output information 62 each indicate the energy source ratio. Specifically, the first output information 61 indicates the gas type mixing ratio. The gas type mixing ratio indicates the ratio of multiple types of energy sources. The second output information 62 indicates the individual mixing ratio xi of each energy source. The individual mixing ratio xi of each energy source indicates the ratio of multiple energy sources. The individual mixing ratio xi of each energy source is calculated based on the above equations (1) to (9).

[0103] The gas type blending ratio is calculated based on the individual blending ratio xi of each energy source. In this embodiment, the gas type blending ratio includes the LNG blending ratio X(LNG) and the hydrogen blending ratio X(H2). The LNG blending ratio X(LNG) represents the sum of the individual blending ratios xi of each energy source where the gas type is LNG. The hydrogen blending ratio X(H2) represents the sum of the individual blending ratios xi of each energy source where the gas type is hydrogen.

[0104] The third output information 63 indicates the electricity-heat ratio. More specifically, the third output information 63 indicates the generated power (electricity) and the amount of recovered thermal energy (heat). Specifically, the processing unit 14 calculates the generated power based on the individual mixing ratio xi calculated based on the above equations (1) to (9), and the above equations (4) and (6). The processing unit 14 also calculates the amount of recovered thermal energy based on the individual mixing ratio xi and heat recovery efficiency ηh calculated based on the above equations (1) to (9), and the above equations (3) and (4).

[0105] In this embodiment, multiple LNGs are stored in one LNG tank 42, and multiple hydrogens are stored in one hydrogen tank 41. In this case, the first control value includes the first output information 61 (gas type mixing ratio) and the third output information 63 (electrical-thermal ratio). That is, the processing unit 14 transmits the gas type mixing ratio and the electrical-thermal ratio to the operation instruction device 21 via the communication unit 11. The processing unit 14 also displays the first output information 61 (gas type mixing ratio), the second output information 62 (individual mixing ratio xi), and the third output information 63 (electrical-thermal ratio) on the display unit 13. Note that if multiple LNGs are stored in different LNG tanks 42 and multiple hydrogens are stored in different hydrogen tanks 41, the first control value includes the second output information 62 (individual mixing ratio xi) and the third output information 63 (electrical-thermal ratio).

[0106] Next, with reference to Figure 8, the second process executed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 8 is a diagram showing the flow of the second process executed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the storage unit 15 causes the processing unit 14 to function to execute the second process shown in Figure 8. As shown in Figure 8, the second process includes steps S11 to S12.

[0107] In step S11, the processing unit 14 calculates the profit from the sale of environmental value based on the energy source ratio included in the control value that maximizes profit, the environmental value index for each energy source, and the selling price of the environmental value. In this embodiment, the processing unit 14 calculates the individual mixing ratio xi of each energy source that maximizes profit, the CI value si of each energy source, the selling price α of the green added value, and the standard carbon dioxide emissions c. o Based on this, the green value-added sales w are calculated. Specifically, the processing unit 14 calculates the green value-added sales w based on the above formulas (7) and (8).

[0108] In step S12, the processing unit 14 notifies the sales profit of the environmental value. In this embodiment, the processing unit 14 displays the calculated green value-added sales w on the display unit 13.

[0109] Next, with reference to Figure 9, the third process executed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 9 is a diagram showing the flow of the third process executed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the storage unit 15 causes the processing unit 14 to function to execute the third process shown in Figure 9. As shown in Figure 9, the third process includes steps S41 to S42.

[0110] In step S41, the processing unit 14 calculates the greenhouse gas emissions for each energy source used as fuel for the cogeneration system 20 based on the energy source ratio included in the control value that maximizes profit and an indicator of the environmental value for each energy source. In this embodiment, the processing unit 14 calculates the carbon dioxide emissions for each energy source based on the individual mixing ratio xi of each energy source that maximizes profit and the CI value si of each energy source.

[0111] In step S42, the processing unit 14 notifies the greenhouse gas emissions from each energy source. In this embodiment, the processing unit 14 displays the calculated carbon dioxide emissions on the display unit 13.

[0112] Next, with reference to Figure 10, the fourth process performed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 10 is a diagram showing the flow of the fourth process performed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the storage unit 15 causes the processing unit 14 to function to perform the fourth process shown in Figure 10. As shown in Figure 10, the fourth process includes steps S51 to S53. By performing the fourth process, the processing unit 14 calculates a control value that maximizes profit by taking heat demand into account.

[0113] In step S51, the processing unit 14 acquires information on multiple energy sources, sales price information, and heat demand, similar to step S1 in Figure 2. The heat demand is input to the processing unit 14 by an operation support worker operating the input unit 12. As a result, the processing unit 14 acquires the heat demand. The heat demand indicates the heat demand at the heat sales destination. In this embodiment, the heat demand at the heat sales destination indicates the steam demand of the factory 40, which is the steam sales destination.

[0114] In step S52, the processing unit 14 calculates a control value that maximizes profit based on information about multiple energy sources, selling price information, and heat demand, similar to step S2 in Figure 2. In step S53, the processing unit 14 outputs a control value that maximizes profit, similar to step S3 in Figure 2.

[0115] More specifically, the processing unit 14 calculates control values ​​that maximize profit based on equations (1) to (9) above. As already explained, when searching for the values ​​of the variables (individual mixing ratio xi and heat recovery efficiency ηh) that maximize the operating profit Pr of the cogeneration system 20, the variable range of each variable is constrained. In the first process, the range in which the heat recovery efficiency ηh is varied is constrained to the range in which the cogeneration device 22 can be operated at its rated capacity. In the fourth process, however, the range in which the heat recovery efficiency ηh is varied is further constrained to the range in which the amount of recovered thermal energy Qh calculated by equation (3) is less than or equal to the heat demand.

[0116] Next, with reference to Figure 11, the fifth process executed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 11 is a diagram showing the flow of the fifth process executed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the memory unit 15 causes the processing unit 14 to function to execute the fifth process shown in Figure 11. As shown in Figure 11, the fifth process includes steps S61 to S63. By executing the fifth process, the processing unit 14 calculates a control value that maximizes profit by taking into account the maximum efficiency of the integrated efficiency of the cogeneration system 20. Hereinafter, the maximum efficiency of the integrated efficiency of the cogeneration system 20 may be referred to as "maximum efficiency of the cogeneration system 20".

[0117] In step S61, the processing unit 14 acquires information on multiple energy sources, sales price information, and the maximum efficiency of the cogeneration system 20, similar to step S1 in Figure 2. The maximum efficiency of the cogeneration system 20 is input to the processing unit 14 by an operator assisting with the operation of the input unit 12. As a result, the processing unit 14 acquires the maximum efficiency of the cogeneration system 20. The maximum efficiency of the cogeneration system 20 represents the power generation efficiency and heat recovery efficiency that maximize the sum of the power generation efficiency and heat recovery efficiency. Specifically, the maximum efficiency of the cogeneration system 20 represents the maximum efficiency of the cogeneration device 22.

[0118] In step S62, the processing unit 14 calculates a control value that maximizes profit based on information about multiple energy sources, selling price information, and the maximum efficiency of the cogeneration system 20, similar to step S2 in Figure 2. In step S63, the processing unit 14 outputs a control value that maximizes profit, similar to step S3 in Figure 2.

[0119] In detail, the processing unit 14 calculates a control value that maximizes profit based on information about multiple energy sources and selling price information, under the condition that the cogeneration system 20 is operated so that its integrated efficiency is maximized. Specifically, the processing unit 14 calculates a control value that maximizes profit based on equations (1) to (9) above. However, in the fifth process, the values ​​of the power generation efficiency ηe and the heat recovery efficiency ηh are constrained to values ​​that maximize the integrated efficiency of the cogeneration system 20. Therefore, in the fifth process, the heat recovery efficiency ηh is not a variable.

[0120] Next, with reference to Figure 12, the sixth process executed by the processing unit 14 included in the driving support device 100 of this embodiment will be described. Figure 12 is a diagram showing the flow of the sixth process executed by the processing unit 14 included in the driving support device 100 of this embodiment. The driving support program 151 stored in the storage unit 15 causes the processing unit 14 to function to execute the sixth process shown in Figure 12. As shown in Figure 12, the sixth process includes steps S71 to S73. By executing the sixth process, the processing unit 14 calculates a control value that maximizes profit, taking into account the ratio setting value.

[0121] In step S71, the processing unit 14 acquires information on multiple energy sources, sales price information, and ratio setting values, similar to step S1 in Figure 2. The ratio setting values ​​are input to the processing unit 14 by the driver assistance operator operating the input unit 12. As a result, the processing unit 14 acquires the ratio setting values. The ratio setting values ​​indicate the setting values ​​for the ratio of energy sources of the same type. In this embodiment, the ratio setting values ​​indicate the setting values ​​for the ratio of each hydrogen contained in the multiple energy sources. Specifically, the ratio setting values ​​indicate the setting values ​​for the individual mixing ratio of each hydrogen.

[0122] In step S72, the processing unit 14 calculates a control value that maximizes profit based on information about multiple energy sources, selling price information, and ratio setting values, similar to step S2 in Figure 2. In step S73, the processing unit 14 outputs a control value that maximizes profit, similar to step S3 in Figure 2.

[0123] In detail, the processing unit 14 calculates a control value that maximizes profit based on equations (1) to (9) above. However, in the sixth process, the individual mixing ratio of each hydrogen is constrained to a set value. Therefore, in the sixth process, the individual mixing ratio of each hydrogen is not a variable.

[0124] Embodiments of the present disclosure have been described above with reference to Figures 1 to 12. In these embodiments, the multiple types of energy sources include hydrogen and liquefied natural gas, but are not limited to liquefied natural gas and hydrogen. For example, the multiple types of energy sources may include two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, and ammonia. For example, the gas turbine 221 may co-fire LNG and hydrogen, or LNG and ammonia, or LNG, ammonia, and hydrogen. Alternatively, the multiple types of energy sources may include two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, ammonia, and organic hydrides. Organic hydrides are organic compounds that reversibly release hydrogen through a catalytic reaction. Organic hydrides include saturated condensed ring hydrocarbons such as methylcyclohexane, cyclohexane, and decalin.

[0125] Furthermore, in this embodiment, the ratio setting value represents the setting value for the ratio of multiple hydrogens, but the ratio setting value may also represent the setting value for the ratio of multiple LNGs. In other words, the ratio setting value may represent the setting value for the individual mixing ratio of each LNG. Alternatively, the ratio setting value may represent the setting value for the ratio of multiple hydrogens and the setting value for the ratio of multiple LNGs.

[0126] Furthermore, a driver assistance program 151 according to one aspect of this disclosure causes at least one processor to execute a driver assistance method. The driver assistance program 151 may be stored in a computer-readable storage medium. The storage medium is a non-transitory and tangible medium. The storage medium may be built into or external to a computer. The storage medium includes RAM (Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), storage, etc., and may be, for example, a hard disk, flash memory, optical disc, etc. The driver assistance program 151 stored in the storage medium may be executed in a computer to which the storage medium is directly connected, or in a computer connected to the storage medium via a network. The network is, for example, the internet.

[0127] Furthermore, the functions of the elements disclosed herein can be performed using circuits or processing circuits, including general-purpose processors, dedicated processors, integrated circuits, ASICs, conventional circuits, and / 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 disclosure, 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, means, or unit is a combination of hardware and software, and the software is used to configure the hardware and / or the processor.

[0128] According to this embodiment, the operation support method supports the operation of a cogeneration system 20 that generates electricity and heat using multiple energy sources as fuel. As shown in steps S2 and S3 of Figure 2, the operation support method of this embodiment includes calculating a control value for the cogeneration system 20 that maximizes the profit obtained by operating the cogeneration system 20, based on information about energy sources including the purchase price, heat quantity, and environmental value index of each energy source, and sales price information including the sales price of heat, the sales price of electricity, and the sales price of environmental value, and outputting the control value that maximizes the profit. Therefore, according to this embodiment, the operation of the cogeneration system 20 can be supported by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system 20. Furthermore, according to this embodiment, the burden on the user required to consider the control value that maximizes the profit can be reduced. Therefore, user convenience is improved.

[0129] Furthermore, according to this embodiment, as shown in step S21 of Figure 3, the control value of the cogeneration system 20 includes an energy source ratio that indicates the ratio of multiple energy sources used to generate electricity and heat by the cogeneration system 20. Therefore, according to this embodiment, the burden on the user required to consider the energy source ratio that maximizes profits can be reduced. Thus, user convenience is improved.

[0130] Furthermore, according to this embodiment, as shown in step S21 of Figure 3, the control value of the cogeneration system 20 further includes an electric-thermal ratio (third output information 63 in Figure 7) which indicates the ratio of the amount of energy of heat recovered by the cogeneration system 20 to the amount of electricity generated by the cogeneration system 20. Therefore, according to this embodiment, the burden on the user required to consider the electric-thermal ratio that maximizes profits can be reduced. Thus, user convenience is improved.

[0131] Furthermore, according to this embodiment, as shown in step S31 of Figure 4, outputting the control value of the cogeneration system 20 includes notifying the user of the control value that maximizes profit. Therefore, according to this embodiment, the user can be notified of the control value that maximizes profit. Thus, user convenience is improved.

[0132] Furthermore, according to this embodiment, as shown in step S32 of Figure 4, outputting the control value of the cogeneration system 20 includes transmitting the control value to at least the first control device 223 among the first control device 223 to the third control device 242. Therefore, according to this embodiment, the burden on the user who inputs the control value to the operation instruction device 21 can be reduced. Thus, user convenience is improved.

[0133] Furthermore, according to this embodiment, as shown in steps S51 and S52 of Figure 10, the operation support method further includes obtaining the heat demand at the heat sales destination, and calculating the control value includes calculating the control value that maximizes profit based on information about the energy source, sales price information, and heat demand. Therefore, according to this embodiment, it is possible to output a control value that maximizes profit under conditions that satisfy the heat demand. Thus, the burden on the user required to consider the control value that maximizes profit can be reduced. As a result, user convenience is improved.

[0134] Furthermore, according to this embodiment, as shown in steps S11 and S12 of Figure 8, the driving support method further includes calculating the profit from the sale of environmental value based on the energy source ratio included in the control value that maximizes profit, an indicator of environmental value for each energy source, and the unit price at which environmental value is sold, and notifying the user of the profit from the sale of environmental value. Therefore, according to this embodiment, the user can know the profit from the sale of environmental value before transferring (selling) the environmental value. Thus, user convenience is improved.

[0135] Furthermore, according to this embodiment, as shown in steps S61 and S62 of Figure 11, determining the control value by calculation involves determining a control value that maximizes profit based on information about the energy source and selling price information, under conditions in which the cogeneration system 20 is operated so that its integrated efficiency is maximized. Therefore, according to this embodiment, it is possible to output a control value that maximizes profit under conditions in which the cogeneration system 20 is operated at maximum efficiency. Thus, the burden on the user required to consider the control value that maximizes profit can be reduced. As a result, user convenience is improved.

[0136] Furthermore, according to this embodiment, as shown in steps S41 and S42 of Figure 9, the environmental value indicator includes greenhouse gas emissions, and the operation support method further includes calculating the greenhouse gas emissions for each energy source used as fuel for the cogeneration system 20 based on the energy source ratio included in the control value that maximizes profit and the environmental value indicator for each energy source, and notifying the user of the greenhouse gas emissions for each energy source. Therefore, according to this embodiment, the user can be notified of the greenhouse gas emissions that maximize profit. Thus, the burden on the user required to calculate greenhouse gas emissions can be reduced. As a result, user convenience is improved.

[0137] Furthermore, according to this embodiment, the multiple energy sources include multiple types of energy sources, and the energy source ratio includes the ratio of the multiple types of energy sources (first output information 61 in Figure 7). Therefore, according to this embodiment, the ratio of multiple types of energy sources used as fuel for the cogeneration system 20 can be output. Thus, the burden on the user required to consider the ratio of energy sources can be reduced. As a result, user convenience is improved.

[0138] Furthermore, according to this embodiment, the multiple types of energy sources include two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, and ammonia. Therefore, according to this embodiment, when two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, and ammonia are used as fuel for the cogeneration system 20, the ratio of the two or more selected energy sources can be output. Thus, the burden on the user required to consider the ratio of energy sources can be reduced. As a result, user convenience is improved.

[0139] Furthermore, according to this embodiment, the multiple energy sources include multiple energy sources of the same type, and the energy source ratio includes the ratio of multiple energy sources of the same type (second output information 62 in Figure 7). Therefore, according to this embodiment, when multiple energy sources of the same type are used as fuel for the cogeneration system 20, the ratio of multiple energy sources of the same type can be output. Thus, the burden on the user required to consider the ratio of energy sources can be reduced. As a result, user convenience is improved.

[0140] Furthermore, according to this embodiment, as shown in steps S71 and S72 of Figure 12, the operation support method further includes obtaining a ratio setting value, which is a set value for the ratio of multiple energy sources of the same type, and calculating the control value by calculation includes calculating a control value that maximizes profit based on information about the energy sources, selling price information, and the ratio setting value. Therefore, according to this embodiment, even if the ratio of multiple energy sources of the same type is predetermined, a control value that maximizes profit can be output. Thus, the burden on the user required to consider the control value of the cogeneration system 20 can be reduced. As a result, user convenience is improved.

[0141] Furthermore, according to this embodiment, multiple energy sources of the same type contain multiple hydrogens with different environmental values. Therefore, according to this embodiment, when multiple hydrogens with different environmental values ​​are used as fuel for the cogeneration system 20, the ratio of the multiple hydrogens can be output. Thus, the burden on the user required to consider the ratio of energy sources can be reduced. As a result, user convenience is improved.

[0142] Furthermore, according to this embodiment, multiple energy sources of the same type include multiple liquefied natural gases from different origins. Therefore, according to this embodiment, when multiple liquefied natural gases from different origins are used as fuel for the cogeneration system 20, the ratio of the multiple liquefied natural gases from different origins can be output. Thus, the burden on the user required to consider the ratio of energy sources can be reduced. As a result, user convenience is improved.

[0143] Furthermore, according to this embodiment, the cogeneration system 20 includes a gas turbine 221 that generates electricity and heat, and a waste heat boiler 222 that recovers heat and generates steam. The control values ​​of the cogeneration system 20 include the control values ​​of the gas turbine 221 and the control values ​​of the waste heat boiler 222, and the control values ​​of the waste heat boiler 222 include a set value for the amount of steam generated by the waste heat boiler 222. Therefore, according to this embodiment, the burden on the user in considering the control values ​​of the waste heat boiler 222 that maximize profits can be reduced. Thus, user convenience is improved.

[0144] Furthermore, according to this embodiment, the cogeneration system 20 further includes a steam turbine 241 that generates electricity using steam, and the control values ​​of the cogeneration system 20 further include a set value for the flow rate of steam supplied to the steam turbine 241. Therefore, according to this embodiment, the burden on the user required to consider the steam flow rate that maximizes profits can be reduced. Thus, user convenience is improved.

[0145] Furthermore, according to this embodiment, the operation support device 100 supports the operation of a cogeneration system 20 that generates electricity and heat using multiple energy sources as fuel. The operation support device 100 of this embodiment includes a storage unit 15 that stores information about energy sources, including the purchase price, heat quantity, and environmental value index of each energy source, and sales price information, including the sales price of heat, the sales price of electricity, and the sales price of environmental value; a processing unit 14 that calculates control values ​​for the cogeneration system 20 that maximize the profit obtained by operating the cogeneration system 20 based on the information about energy sources and the sales price information; and a communication unit 11 and a display unit 13, which are examples of output units that output control values ​​that maximize profit.Therefore, according to this embodiment, the operation of the cogeneration system 20 can be supported by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system 20.Furthermore, according to this embodiment, the burden on the user required to consider control values ​​that maximize profit can be reduced.Therefore, user convenience is improved.

[0146] Furthermore, according to this embodiment, an operation support program 151, which is an example of a computer program, supports the operation of a cogeneration system 20 that generates electricity and heat using multiple energy sources as fuel. As shown in steps S2 and S3 of Figure 2, the operation support program 151 calculates control values ​​for the cogeneration system 20 that maximize the profit obtained by operating the cogeneration system 20, based on information about energy sources including the purchase price, heat quantity, and environmental value index of each energy source, and sales price information including the sales price of heat, the sales price of electricity, and the sales price of environmental value, and causes the computer to function to output control values ​​that maximize profit.Therefore, according to this embodiment, the operation of the cogeneration system 20 can be supported by taking into account the environmental value of each of the multiple energy sources used as fuel for the cogeneration system 20.Furthermore, according to this embodiment, the burden on the user required to consider control values ​​that maximize profit can be reduced.Therefore, user convenience is improved.

[0147] Embodiments of the present disclosure have been described above with reference to the drawings (Figures 1 to 12). However, the present disclosure is not limited to the embodiments described above, and can be implemented in various forms without departing from its essence. Furthermore, the multiple components disclosed in the above embodiments can be modified as appropriate. For example, some components from all the components shown in one embodiment may be added to the components of another embodiment, or some components from all the components shown in one embodiment may be removed from the embodiment.

[0148] Furthermore, the drawings schematically show each component in order to facilitate understanding, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual dimensions due to the constraints of drawing creation. Also, the configuration of each component shown in the above embodiments is merely an example and is not particularly limiting, and it goes without saying that various modifications are possible within the scope that does not substantially deviate from the effects of this disclosure.

[0149] For example, in the embodiment described with reference to Figures 1 to 12, the cogeneration system 20 includes a hydrogen tank 41, an LNG tank 42, a hydrogen supply pipe 44, an LNG supply pipe 45, flow control valves 44a and 44b, flow control valves 45a and 45b, and a flow control valve 46a. However, the hydrogen tank 41, the LNG tank 42, the hydrogen supply pipe 44, the LNG supply pipe 45, the flow control valves 44a and 44b, the flow control valves 45a and 45b, and the flow control valve 46a may be equipment of the factory 40.

[0150] Furthermore, in the embodiments described with reference to Figures 1 to 12, the auxiliary boiler 231 generated steam using multiple types of energy sources as fuel, but the auxiliary boiler 231 may generate steam using only one type of energy source as fuel. For example, the auxiliary boiler 231 may generate steam using only LNG as fuel.

[0151] Furthermore, in the embodiment described with reference to Figures 1 to 12, steam was supplied from the cogeneration system 20 to multiple steam consumption equipment 43 within the factory 40. However, in addition to the multiple steam consumption equipment 43 within the factory 40, or instead of the multiple steam consumption equipment 43 within the factory 40, steam may also be supplied from the cogeneration system 20 to one or more steam consumption equipment around the factory 40.

[0152] Furthermore, in the embodiment described with reference to Figures 1 to 12, multiple steam consumption equipment 43 are installed in the factory 40, but the number of steam consumption equipment 43 installed in the factory 40 may be just one.

[0153] Furthermore, in the embodiment described with reference to Figures 1 to 12, the waste heat boiler 222 produced steam, but the waste heat boiler 222 may produce both steam and hot water. Similarly, the auxiliary boiler 231 produced steam, but the auxiliary boiler 231 may produce both steam and hot water.

[0154] Furthermore, in the embodiments described with reference to Figures 1 to 12, the cogeneration device 22 had a gas turbine 221, but the cogeneration device 22 may have a gas engine that generates electricity using multiple energy sources as fuel, instead of the gas turbine 221, or in addition to the gas turbine 221.

[0155] Furthermore, in the embodiment described with reference to Figures 1 to 12, information regarding LNG is input to the processing unit 14 via the input unit 12, but some or all of the information regarding LNG may be obtained from an external server via the communication unit 11.

[0156] Furthermore, in the embodiment described with reference to Figures 1 to 12, the cogeneration operator owns the driver assistance device 100, but the driver assistance device 100 may be included in the hydrogen management device 30.

[0157] Furthermore, in the embodiment described with reference to Figures 1 to 12, the driving support device 100 obtained the hydrogen purchase price and the heat quantity of hydrogen from the hydrogen management device 30. However, the hydrogen purchase price and the heat quantity of hydrogen may also be input to the processing unit 14 via the input unit 12.

[0158] Furthermore, in the embodiments described with reference to Figures 1 to 12, examples of hydrogen with different origins were given, including hydrogen produced by water electrolysis using electricity derived from renewable energy, hydrogen produced by water electrolysis using electricity derived from fossil fuels, hydrogen derived from fossil fuels such as lignite in which carbon dioxide emitted during the hydrogen production process is recovered, and hydrogen derived from fossil fuels such as lignite in which carbon dioxide emitted during the hydrogen production process is not recovered. However, hydrogen with different origins is not limited to these. For example, hydrogen with different origins may include hydrogen derived from geothermal power generation, hydrogen derived from nuclear power generation, hydrogen derived from solar power generation, and hydrogen derived from wind power generation.

[0159] Furthermore, in the embodiment described with reference to Figures 1 to 12, the cogeneration system 20 had a first auxiliary device 23 and a second auxiliary device 24, but one or both of the first auxiliary device 23 and the second auxiliary device 24 may be omitted.

[0160] Furthermore, in the embodiments described with reference to Figures 1 to 12, the power generation efficiency ηe was a constant value, but the power generation efficiency ηe may be a variable. In other words, the power generation efficiency ηe may be controlled (adjusted).

[0161] [Note] This disclosure further discloses the following aspects, which are not limiting to this disclosure.

[0162] [Aspect 1] A driver assistance method for assisting the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, Based on information about the energy sources, including the purchase price, heat quantity, and environmental value indicators for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, the control values ​​of the cogeneration system that maximize the profit obtained by operating the cogeneration system are calculated by computation. Outputting the aforementioned control value Driving assistance methods, including those mentioned above.

[0163] [Aspect 2] The operation support method according to embodiment 1, wherein the control value includes an energy source ratio indicating the ratio of the plurality of energy sources used for generating the electricity and heat by the cogeneration system.

[0164] [Aspect 3] The operation support method according to embodiment 1 or embodiment 2, wherein the control value further includes an electrothermal ratio indicating the ratio of the amount of energy of the heat recovered by the cogeneration system to the amount of electricity generated by the cogeneration system.

[0165] [Aspect 4] The operation support method according to any one of embodiments 1 to 3, wherein outputting the control value includes notifying the control value.

[0166] [Aspect 5] The operation support method according to any one of embodiments 1 to 4, wherein outputting the control value includes transmitting the control value to a control device that controls the cogeneration system, and the control device controls the cogeneration system based on the control value.

[0167] [Aspect 6] This further includes obtaining the demand for the heat at the buyer of the heat, The operation support method according to any one of embodiments 1 to 5, wherein determining the control value by calculation processing includes determining the control value that maximizes the profit based on information regarding the energy source, the selling price information, and the heat demand by calculation processing.

[0168] [Aspect 7] Based on the energy source ratio included in the control value that maximizes the aforementioned profit, the environmental value index for each of the aforementioned energy sources, and the selling price of the aforementioned environmental value, the profit from the sale of the aforementioned environmental value is calculated by computation. To notify the profits from the sale of the aforementioned environmental value. A driving assistance method according to any one of embodiments 2 to 6, further comprising the above.

[0169] [Aspect 8] The operation support method according to any one of embodiments 1 to 7, wherein determining the control value by calculation processing includes determining the control value that maximizes the profit by calculation processing based on information about the energy source and the selling price information, under conditions for operating the cogeneration system so that the integrated efficiency of the cogeneration system is maximized.

[0170] [Aspect 9] The aforementioned environmental value indicator includes greenhouse gas emissions, The aforementioned driving assistance method is Based on the energy source ratio included in the control value that maximizes the aforementioned profit and the environmental value index for each of the aforementioned energy sources, the greenhouse gas emissions for each of the aforementioned energy sources used as fuel for the cogeneration system are calculated by computation. To notify the greenhouse gas emissions for each of the aforementioned energy sources. A driving assistance method according to any one of embodiments 2 to 8, further comprising the above.

[0171] [Aspect 10] The aforementioned multiple energy sources include multiple types of energy sources, The operation support method according to any one of embodiments 2 to 9, wherein the energy source ratio includes the ratio of the multiple types of energy sources.

[0172] [Aspect 11] The operation support method according to embodiment 10, wherein the aforementioned multiple types of energy sources include two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, and ammonia.

[0173] [Aspect 12] E Multiple energy sources include multiple energy sources of the same type, The driving support method according to any one of embodiments 2 to 11, wherein the energy source ratio includes the ratio of multiple energy sources of the same type.

[0174] [Aspect 13] The method further includes obtaining a ratio setting value which is a setting value for the ratio of multiple energy sources of the same type, The driving support method according to embodiment 12, wherein determining the control value by calculation processing includes determining the control value that maximizes the profit by calculation processing based on information regarding the energy source, the selling price information, and the ratio setting value.

[0175] [Aspect 14] The driving support method according to embodiment 12 or embodiment 13, wherein the aforementioned multiple energy sources of the same type include multiple hydrogens that have different environmental values ​​from one another.

[0176] [Aspect 15] The operation support method according to any one of embodiments 12 to 14, wherein the aforementioned multiple energy sources of the same type include multiple liquefied natural gases of different origins.

[0177] [Aspect 16] The aforementioned cogeneration system is A gas turbine that generates the aforementioned electricity and heat, A waste heat boiler that recovers the aforementioned heat and generates steam, Equipped with, The control value includes the control value of the gas turbine and the control value of the waste heat boiler. The control value of the waste heat boiler includes the set value of the amount of steam, according to the operation support method according to any one of embodiments 1 to 15.

[0178] [Aspect 17] The aforementioned cogeneration system further comprises a steam turbine that generates electricity using steam, The operation support method according to any one of embodiments 1 to 16, wherein the control value further includes a set value for the flow rate of the steam supplied to the steam turbine.

[0179] [Aspect 18] An operation support device that assists the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, A storage unit that stores information about the energy sources, including the purchase price, heat quantity, and environmental value index for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value. A processing unit that calculates, based on the information regarding the energy source and the sales price information, a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system, An output unit that outputs the aforementioned control value and A driver assistance system equipped with the following features.

[0180] [Aspect 19] A computer program that supports the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, Based on information about the energy sources, including the purchase price, heat quantity, and environmental value indicators for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system is calculated by computation. Output the control value A computer program that makes a computer function in a certain way. [Explanation of Symbols]

[0181] 11 Communications Department 12 Input section 13 Display section 14 Processing Unit 15 Storage section 20 Cogeneration Systems 21. Operation indicator device 22 Waste heat boiler 22 Cogeneration equipment 23 1st auxiliary device 24 Second auxiliary device 30 Hydrogen management system 61. First Output Information 62 Second Output Information 63 Third Output Information 70A Hydrogen Production System 70B Hydrogen Production System 71A power system 71B Power system 72A Renewable Energy Power Generation System 72B Renewable energy power generation equipment 100 Driving support devices 151 Driving Assistance Programs 221 Gas Turbine 222 Waste heat boiler 223 First control device 231 Auxiliary boiler 232 Second Control Device 241 Steam Turbine 242 Third control device

Claims

1. A driver assistance method for assisting the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, Based on information about the energy sources, including the purchase price, heat quantity, and environmental value indicators for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, the control values ​​of the cogeneration system that maximize the profit obtained by operating the cogeneration system are calculated by computation. Outputting the aforementioned control value Driving assistance methods, including those mentioned above.

2. The operation support method according to claim 1, wherein the control value includes an energy source ratio indicating the ratio of the plurality of energy sources used to generate the electricity and heat by the cogeneration system.

3. The operation support method according to claim 1 or claim 2, wherein the control value further includes an electrothermal ratio indicating the ratio of the amount of energy of the heat recovered by the cogeneration system to the amount of electricity generated by the cogeneration system.

4. The driving support method according to claim 1 or claim 2, wherein outputting the control value includes notifying the control value.

5. The driving support method according to claim 1 or 2, wherein outputting the control value includes transmitting the control value to a control device that controls the cogeneration system, and the control device controls the cogeneration system based on the control value.

6. This further includes obtaining the demand for the heat at the buyer of the heat, The operation support method according to claim 1 or 2, wherein determining the control value by calculation processing includes determining the control value that maximizes the profit based on information regarding the energy source, the selling price information, and the heat demand by calculation processing.

7. Based on the energy source ratio included in the control value that maximizes the aforementioned profit, the environmental value index for each of the aforementioned energy sources, and the selling price of the aforementioned environmental value, the profit from the sale of the aforementioned environmental value is calculated by computation. To notify the profits from the sale of the aforementioned environmental value. The driving assistance method according to claim 2, further comprising:

8. The operation support method according to claim 1 or 2, wherein determining the control value by calculation processing includes determining the control value that maximizes the profit by calculation processing based on information about the energy source and the selling price information, under conditions for operating the cogeneration system so that the integrated efficiency of the cogeneration system is maximized.

9. The aforementioned environmental value indicator includes greenhouse gas emissions, The aforementioned driving assistance method is Based on the energy source ratio included in the control value that maximizes the aforementioned profit and the environmental value index for each of the aforementioned energy sources, the greenhouse gas emissions for each of the aforementioned energy sources used as fuel for the cogeneration system are calculated by computation. To notify the greenhouse gas emissions for each of the aforementioned energy sources. The driving assistance method according to claim 2, further comprising:

10. The aforementioned multiple energy sources include multiple types of energy sources, The driving support method according to claim 2, wherein the energy source ratio includes the ratio of the multiple types of energy sources.

11. The operation support method according to claim 10, wherein the plurality of energy sources include two or more energy sources selected from the group consisting of liquefied natural gas, hydrogen, and ammonia.

12. E Multiple energy sources include multiple energy sources of the same type, The driving support method according to claim 2, wherein the energy source ratio includes the ratio of multiple energy sources of the same type.

13. The method further includes obtaining a ratio setting value which is a setting value for the ratio of multiple energy sources of the same type, The driving support method according to claim 12, wherein determining the control value by calculation includes determining the control value that maximizes the profit by calculation based on information regarding the energy source, the selling price information, and the ratio setting value.

14. The driving support method according to claim 12, wherein the plurality of energy sources of the same type include a plurality of hydrogens that have different environmental values ​​from each other.

15. The operation support method according to claim 12, wherein the aforementioned multiple energy sources of the same type include multiple liquefied natural gases of different origins.

16. The aforementioned cogeneration system is A gas turbine that generates the aforementioned electricity and heat, A waste heat boiler that recovers the aforementioned heat and generates steam, Equipped with, The control value includes the control value of the gas turbine and the control value of the waste heat boiler. The operation support method according to claim 1 or claim 2, wherein the control value of the waste heat boiler includes a set value for the amount of steam.

17. The aforementioned cogeneration system further comprises a steam turbine that generates electricity using steam, The operation support method according to claim 1 or claim 2, wherein the control value further includes a set value for the flow rate of the steam supplied to the steam turbine.

18. An operation support device that assists the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, A storage unit that stores information about the energy sources, including the purchase price, heat quantity, and environmental value index for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value. A processing unit that calculates, based on the information regarding the energy source and the sales price information, a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system, An output unit that outputs the aforementioned control value and A driver assistance device equipped with the following features.

19. A computer program that supports the operation of a cogeneration system that generates electricity and heat using multiple energy sources as fuel, Based on information about the energy sources, including the purchase price, heat quantity, and environmental value indicators for each of the energy sources, and sales price information, including the sales price of the heat, the sales price of the electricity, and the sales price of the environmental value, a control value for the cogeneration system that maximizes the profit obtained by operating the cogeneration system is calculated by computation. Output the control value A computer program that makes a computer function in a certain way.

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