JP7290212B1 - Ship power generation system, ship power generation method, and program for controlling ship power generation system - Google Patents

Abstract

An object of the present invention is to effectively utilize ammonia in an ammonia-equipped ship to reduce costs required during the operation period of the ship, including equipment costs and operating costs including fuel costs required during the operation period of the ship. , a ship power generation system, a ship power generation method, and a control program for a ship power generation system. Kind Code: A1 A power generation system for generating electric power to be used in an ammonia-equipped ship that carries ammonia as a fuel for a main engine or as a cargo, wherein the fuel gas is a gas mainly composed of hydrogen generated by partially decomposing ammonia. The solid oxide fuel cell 11, the diesel engine power generators 12 and 13, and the operation of each power generator is controlled so as to generate electric power, and the solid oxide fuel cell 11 is given priority among the power generators. a controller 14 configured to activate, the controller 14 having an acquisition unit 14a, a determination unit 14b, and an activation unit 14c. [Selection drawing] Fig. 1

Description

Application of Article 30, Paragraph 2 of the Patent Law Published on March 11, 2022 on the website of the Ministry of Land, Infrastructure, Transport and Tourism at the following address https://www. mlit. go. jp/report/press/content/001469635. pdf https://www. mlit. go. jp/report/press/content/001469636. pdf Published on March 14, 2020 on the website of Mitsui E&S Machinery Co., Ltd. at the following address https://www. mes. co. jp/press/2022/0314_001757. html

The present invention relates to a marine power generation system, a marine power generation method, and a control program for a marine power generation system.

Ships use fossil fuels such as heavy oil and natural gas as fuel for their engines, but with the recent trend toward carbon neutrality, the development of ships that use carbonless energy sources such as hydrogen and ammonia as fuel is progressing. ing. Among them, ammonia is considered to be a promising fuel for ships due to its high volumetric energy density and ease of storage and transportation.

A ship has an engine (hereinafter referred to as the main engine) that is responsible for propulsion and multiple generators that generate electricity for the ship. A 2-stroke diesel engine is adopted, and a 4-stroke diesel engine or a dual fuel gas engine is adopted as a power generator.

Further, Patent Document 1 discloses a solid oxide fuel cell system using ammonia as a fuel.

JP 2017-84592 A

Here, since ammonia has flame-retardant properties, it is difficult to use it as a fuel for a four-stroke diesel engine. Alcohol fuel such as bio-methanol must be installed separately.

In addition, although it is possible to use ammonia fuel in dual fuel gas engines, the power generation efficiency is lower than that of 4-stroke diesel engines. Connect.

Furthermore, when the above-mentioned solid oxide fuel cell system using ammonia as fuel is adopted for marine use, the power generation efficiency is higher than that of a 4-stroke diesel engine or a dual fuel gas engine, but the equipment cost is higher than that of both. There is a problem that there is

In view of the above circumstances, the present invention effectively utilizes the ammonia mounted on the ammonia-equipped ship, and the operation period of the ship, including the equipment cost and the operation cost including the fuel cost required during the operation period of the ship. It is an object of the present invention to provide a ship power generation system, a ship power generation method, and a control program for the ship power generation system, which can reduce the cost required during operation.

One aspect of the present invention is a power generation system that generates electric power to be used in an ammonia-equipped ship equipped with ammonia as a fuel or cargo for a main engine, which is an engine that propels the ship ,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
When the power demand of the ship exceeds the rated output of the solid oxide fuel cell, the control device increases or decreases the amount of power demand of the ship per unit time to that of the solid oxide fuel cell per unit time. A marine power generation system in which only the first power generation device of the power generation devices is operated except when the output fluctuation value exceeds the allowable range and when the operation of the solid oxide fuel cell is disabled. be.

Preferably, the internal combustion engine is a diesel engine.

It is preferable that the first power generator further includes a secondary battery.

Another aspect of the present invention is a power generation system for generating electric power for use in an ammonia-equipped ship equipped with ammonia as main engine fuel or cargo,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The control device is
an acquisition unit configured to acquire information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination unit configured to determine whether or not;
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, an activation unit configured to activate at least one power generator other than the first power generator only in any of the cases of;
It is a marine power generation system having

Another aspect of the present invention is a power generation system for generating electric power for use in an ammonia-equipped ship equipped with ammonia as main engine fuel or cargo,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The first power generator further has a secondary battery,
The control device is
an acquisition unit configured to acquire ship power demand information;
a determination unit configured to determine whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a starter configured to start at least one power plant other than
has
The electric power is used in equipment of the ammonia ship,
The secondary battery is a marine power generation system that is connected to the solid oxide fuel cell so that power is supplied from the solid oxide fuel cell to the equipment via the secondary battery.

Another aspect of the present invention is a power generation system for generating electric power for use in an ammonia-equipped ship equipped with ammonia as main engine fuel or cargo,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The first power generator further has a secondary battery,
The control device is
an acquisition unit configured to acquire information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination unit configured to determine whether or not;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a starter configured to start at least one power plant other than
a switching unit configured to supply power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
It is a marine power generation system having

Another aspect of the present invention is a power generation method for generating electric power to be used in an ammonia-equipped ship equipped with ammonia as fuel or cargo for a main engine, which is an engine that propels the ship, comprising :
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step for preferentially operating the power generation device,
In the control step, when the ship's power demand exceeds the rated output of the solid oxide fuel cell, the amount of increase or decrease in the ship's power demand per unit time is increased or decreased per unit time of the solid oxide fuel cell. A power generation method for ships, wherein only the first power generation device of the power generation devices is operated except when the allowable range of the output fluctuation value is exceeded and when the operation of the solid oxide fuel cell is disabled. There is .

Preferably, the internal combustion engine is a diesel engine.

It is preferable that the first power generator further includes a secondary battery.

Another aspect of the present invention is a power generation method for generating electric power to be used in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, a starting step of starting at least one power generating device other than the first power generating device only in either case;
A ship power generation method comprising :

Another aspect of the present invention is a power generation method for generating electric power to be used in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The first power generator further has a secondary battery,
The control step includes:
an obtaining step of obtaining ship power demand information;
a determination step of determining whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
with
The electric power is used in equipment of the ammonia ship,
The secondary battery is connected to the solid oxide fuel cell so that power is supplied from the solid oxide fuel cell to the equipment via the secondary battery.

Another aspect of the present invention is a power generation method for generating electric power to be used in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The first power generator further has a secondary battery,
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
a switching step of supplying power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
A ship power generation method comprising :

Another aspect of the present invention is a program for controlling the operation of a power generation system that generates electric power used in an ammonia-equipped ship that carries ammonia as a fuel or cargo for a main engine , which is an engine that propels the ship. There is
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
In the control step, when the ship's power demand exceeds the rated output of the solid oxide fuel cell, the amount of increase or decrease in the ship's power demand per unit time is increased or decreased per unit time of the solid oxide fuel cell. A marine power generation system that operates only the first power generation device of the power generation devices, except when the output fluctuation value exceeds the allowable range and when the operation of the solid oxide fuel cell becomes impossible. It is a control program .

Another aspect of the present invention is a program for controlling the operation of a power generation system that generates electric power for use in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, a starting step of starting at least one power generating device other than the first power generating device only in either case;
A control program for a marine power generation system, comprising :

Another aspect of the present invention is a program for controlling the operation of a power generation system that generates electric power for use in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The control step includes:
an obtaining step of obtaining ship power demand information;
a determination step of determining whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
A control program for a marine power generation system, comprising :

Another aspect of the present invention is a program for controlling the operation of a power generation system that generates electric power for use in an ammonia-equipped ship equipped with ammonia as a main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The first power generator further has a secondary battery,
The control step includes:
an acquisition step of acquiring information on each of a ship power demand and an increase/decrease amount of the ship power demand;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
a switching step of supplying power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
A control program for a marine power generation system, comprising :

According to the marine power generation system, the marine power generation method, and the control program for the marine power generation system of the above aspects, the ammonia in the ammonia-equipped ship is effectively used, and the equipment cost and the fuel required during the operation period of the ship are reduced. Operating costs, including costs, and costs incurred during the life of the vessel can be reduced.

1 is a configuration diagram of a marine power generation system 1. FIG. 1 is a configuration diagram of a marine power generation system 2. FIG. 1 is a configuration diagram of a marine power generation system 3. FIG. 1 is a configuration diagram of a marine power generation system 4. FIG. 1 is a configuration diagram of a marine power generation system 5. FIG. It shows the operation of the flowchart of the first embodiment. It shows the operation of the flowchart of the third embodiment. It shows the operation of the flowchart of the fourth embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Various features shown in the embodiments shown below can be combined with each other.

<First embodiment>
FIG. 1 is a diagram showing an example of the configuration of a marine power generation system 1. As shown in FIG. The marine power generation system 1 is provided in a ship equipped with ammonia as a main engine fuel or cargo, and supplies power to each facility of the ship, and mainly includes a solid oxide fuel cell 11 and a diesel engine. It has generators 12 , 13 and a controller 14 .

The solid oxide fuel cell 11 generates power through a chemical reaction between a fuel gas and an oxidizing gas, and is preferentially operated in this power generation system. Power is supplied along the power line to each facility installed on the ship, such as navigation instruments, radio equipment, air conditioners, and lighting. Air, for example, can be used as the oxidizing gas, but it is not limited to this. The fuel gas is a gas containing hydrogen as a main component, generated by decomposing ammonia supplied from an ammonia tank 6 mounted on a ship using an ammonia decomposer 7 that decomposes ammonia. The content is 80 vol% or more, preferably 90 vol% or more. Specifically, the content of hydrogen is, for example, 80 vol%, 85 vol%, 90 vol%, 95 vol%, and 100 vol%, and may be within a range between any two of the numerical values exemplified here.

The diesel engine generators 12 and 13 generate power using light oil and heavy oil as fuel, and in this power generation system, are temporarily operated according to the power demand described later. Electric power is supplied along the power line common to the physical fuel cell 11 . From the viewpoint of carbon neutrality, the fuel used in the diesel engine generators 12 and 13 is preferably, for example, biodiesel fuel containing fatty acid methyl ester, but is not limited to this. The diesel engine generator 12 has a diesel engine 12a and a generator 12b, and the diesel engine generator 13 has a diesel engine 13a and a generator 13b.

The diesel engine generators 12, 13 and the solid oxide fuel cell 11 operate independently and are arranged in parallel to generate electric power. In this embodiment, one power generator having a solid oxide fuel cell and two diesel engine generators are installed, but the number of each power generator is not limited to this, and can be selected according to the type of ship. .

The control device 14 controls the operation of the solid oxide fuel cell 11 and the diesel engine generators 12 and 13, and is electrically connected to the solid oxide fuel cell 11 and the diesel engine generators 12 and 13. be done.

The control device 14 has an acquisition unit 14a, a determination unit 14b, and an activation unit 14c. The acquisition unit 14a, the determination unit 14b, and the activation unit 14c can each be realized by an electric circuit. For example, the control device 14 includes a computer configured to cause the computer to execute a control program, which is stored in a memory included in the computer and will be described later. The memory may be provided in the control device 14 separately from the computer, but the storage location of the control program is not limited to this.

Next, operation of the marine power generation system 1 shown in FIG. 1 will be described with reference to FIG. FIG. 6 is a flow chart showing the operation of the ammonia-equipped ship power generation system 1 . The operations shown in the flowchart are implemented, for example, by executing a control program.

The controller 14 activates the solid oxide fuel cell 11 . Next, the acquiring unit 14a acquires information on the ship's power demand and the increase/decrease amount of the ship's power demand per unit time (hereinafter referred to as increase/decrease amount) from each facility of the ship ( Steps S101, S102). Here, the ship power demand is the total value of the power required by each facility on the ship. The increase/decrease amount can be calculated based on the ship power demand. In addition, regarding ship power demand, machine learning is performed using actual data on power demand during past ship operations, as well as operation data related to ship operation information such as ship operation routes and weather information. Prediction can be made by inputting desired operation information into a computer-learned prediction model that has established a correspondence relationship between demand and operation information, but the prediction method is not limited to this. The information on the ship's power demand and the increase/decrease amount may be information on the real-time ship power consumption and the increase/decrease amount of the ship's power consumption per unit time.

The determination unit 14b determines whether or not the ship power demand exceeds the rated output of the solid oxide fuel cell 11 (step S103), is exceeded (step S104). Here, the load fluctuation response performance indicates the allowable range of the output fluctuation value per unit time of the solid oxide fuel cell 11, and is expressed, for example, by −1.5 to 1.5%/min. be.

Starting unit 14c, if the ship power demand exceeds the rated output of the solid oxide fuel cell 11 (step S103), if the amount of increase or decrease exceeds the load fluctuation response performance of the solid oxide fuel cell 11 (step S104), and when the operation of the solid oxide fuel cell 11 becomes impossible due to, for example, a failure (step S105), the diesel engine generator 12 or 13, or both are started. (Step S106). On the other hand, if none of these cases of steps S103, S104, and S105 apply, the starting unit 14c does not start the diesel engine generators 12 and 13. Whether or not the operation of the solid oxide fuel cell 11 has become impossible can be determined by reading the voltage value of the solid oxide fuel cell 11, but the determination method is not limited to this. The order of steps S103, S104, and S105 may be reversed.

In this embodiment, each unit included in the control device may include, for example, a combination of hardware resources implemented by circuits in a broad sense and software information processing that can be specifically realized by these hardware resources. . In addition, although various information is handled in this embodiment, these information are, for example, physical values of signal values representing voltage and current, and signal values as binary bit aggregates composed of 0 or 1. , or quantum superposition (so-called quantum bit), and communication and computation can be performed on a circuit in a broad sense.

A circuit in a broad sense is a circuit implemented by appropriately combining at least circuits, circuits, processors, memories, and the like. Application Specific Integrated Circuits (ASICs); Programmable Logic Devices (e.g., Simple Programmable Logic Devices (SPLDs); Complex Programmable Logic Devices (CPLDs); and field It includes a programmable gate array (Field Programmable Gate Array: FPGA).

Here, the energy unit price of ammonia is calculated from the following formula. 3.6 (GJ/MWh) indicates a unit conversion factor.
Energy unit price ($/MWh) = unit weight ($/ton)/specific enthalpy (MJ/kg) x 3.6 (GJ/MWh) (1)
Also, the fuel cost per 1 MWh is calculated by the following formula.
Unit hour fuel cost ($/MWh) = energy unit price ($/MWh) x power generation efficiency (%) (2)

From equations (1) and (2), and a typical ship operation period of 20 years or more, solid oxide fuel cell 11 fueled by ammonia and biodiesel that can be treated as a carbon-neutral fuel The fuel cost of the diesel engine generators 12 and 13 fueled by is calculated during the vessel operation period. Here, since the future price of blue ammonia is suggested to be 350 to 400 dollars per ton (from Ammonfuel-an industrial view of ammonia as a marine fuel, Alfa Laval et.al, 2020), the price of ammonia The median price of $375 is used as the weight unit price. Blue ammonia is the name of ammonia produced by recovering CO ₂ emitted in the production process using fossil fuel as a raw material. The specific enthalpy of ammonia was 18.8 MJ/kg, and the power generation efficiency of the solid oxide fuel cell was set to 53% based on the lower heating value of ammonia. Regarding the price of biodiesel fuel, since the price fluctuates greatly depending on the raw material, the same energy unit price as ammonia is adopted as the price that is generally said to be the lower limit here, and the power generation efficiency of the diesel engine generator is 45. %. In addition, considering the operating rate of general ships, the annual operating rate of the first power generator, which is preferentially operated, is set at 80%, and the annual operating rate of the second power generator or the third power generator, which is temporarily operated. 20%.

Furthermore, the price of a power generator having a solid oxide fuel cell is said to be ¥270,000/kWh, and the price of a diesel engine generator is said to be ¥50,000/kWh. is 600 kW, the difference in equipment introduction cost per unit is about 1,015,000 dollars (¥130/dollar).

Based on the above premises, for example, regarding a marine power generation system equipped with three power generation devices, which is common in large ocean-going ships, the total cost of the device cost and the fuel cost for 20 years is assumed to be a diesel engine power generator. Table 1 shows the cost ratio for each combination of generator models, using the combination as a reference.

From Table 1, the combination (Case 3) when the power generator to be preferentially operated is the solid oxide fuel cell 11 and the second power generator or the third power generator to be temporarily operated is a diesel engine generator is , the cost is lower than the combination (Case 2) in which all three power generation devices are solid oxide fuel cells, or the combination (Case 1) in which all three power generation devices are diesel engine generators.
In comparing Case 1 and Case 3, the equipment cost of Case 3 is about $1,015,000 more expensive than Case 1, while the annual fuel cost of Case 3 is about $101,280 less than Case 1. Therefore, it becomes possible to recover the introduction cost difference of the apparatus in about 10 years.
Furthermore, in Case 1, which employs only a diesel engine generator, ammonia cannot be effectively used for main engine applications and cargo, but in Case 3, which employs a solid oxide fuel cell 11 that uses ammonia as a raw fuel, the ammonia can be effectively used. Utilization becomes possible.

According to the present embodiment, as the fuel for the solid oxide fuel cell 11 that preferentially operates, it is possible to effectively utilize the ammonia carried on the ship as fuel for the main engine or cargo.

Moreover, according to this embodiment, it is possible to reduce the costs required during the operating period of the vessel, including the equipment costs and the operating costs including the fuel costs required during the operating period of the vessel.

In addition, according to this embodiment, the second power generation device or the third power generation device that is temporarily operated can be operated at an appropriate timing according to the power demand and the amount of increase or decrease, so high-cost biodiesel fuel can prevent extra fuel consumption.

<Second embodiment>
A second embodiment of a marine power generation system according to the present invention will be described, centering on parts different from the first embodiment. The marine power generation system 2 of this embodiment differs in that it has dual fuel engine generators 22 and 23 instead of the diesel engine generators 12 and 13 . In the description below, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof is omitted.

FIG. 2 is a diagram showing an example of the configuration of the marine power generation system 2, which mainly includes a solid oxide fuel cell 11, dual fuel engine generators 22 and 23, and a control device 14. As shown in FIG.

The dual fuel engine generators 22 and 23 generate electricity using either or both of liquid fuel such as light oil and heavy oil, gas fuel obtained by vaporizing liquefied ammonia, or both as fuel, from the viewpoint of carbon neutrality. Therefore, the liquid fuel is preferably biodiesel fuel, but is not limited to this. The dual fuel engine generator 22 has a dual fuel engine 22a and a generator 22b, and the dual fuel engine generator 23 has a dual fuel engine 23a and a generator 23b.

The gas fuel supplied to the dual fuel engine generators 22 and 23 is a hydrogen-containing gas generated by decomposing ammonia supplied from an ammonia tank 6 mounted on a ship using an ammonia decomposer 8. The hydrogen content is 20 vol % or more, preferably 30 vol %, more preferably 40 vol % or more. Specifically, the hydrogen content is, for example, 20 vol%, 30 vol%, 40 vol%, 50 vol%, 60 vol%, 70 vol%, 80 vol%, 90 vol%, and 100 vol%. It may be within a range between two. In this embodiment, one ammonia decomposer is provided for each of the dual fuel engine generators 22 and 23, but each of the dual fuel engine generators 22 and 23 may be provided with one ammonia decomposer. .

Here, it is known that the power generation efficiency of the dual fuel engine generator is 41%. , the cost ratio of the marine power generation system consisting of three power generators for each combination of power generation models is as shown in Table 2 below.

From Table 2, compared to the standard combination of three diesel engine generators (Case 1) and the comparative example of a combination of three dual fuel engine generators (Case 4), A combination (Case 5) in which the power generator to be preferentially operated is the solid oxide fuel cell 11 and the second power generator or the third power generator to be temporarily operated is a dual fuel engine generator is low cost. is.
In comparing Case 4 and Case 5, the equipment cost for Case 5 is about $1,015,000 more expensive than Case 4, while the annual fuel cost for Case 5 is about $166,741 less than Case 4. Therefore, it is possible to recover the introduction cost difference of the equipment in about six years.

According to this embodiment, ammonia can be used as fuel for the dual fuel engine generators 22 and 23 that operate temporarily, and the equipment cost and the fuel cost required during the operation period of the ship are included. Costs incurred during the life of the vessel can be reduced, including operating costs and. Furthermore, since the size of the biodiesel fuel tank can be reduced, it is possible to contribute to the reduction of equipment costs related to the biodiesel fuel tank.

<Third Embodiment>
A third embodiment of a marine power generation system according to the present invention will be described, centering on parts different from the first embodiment. The marine power generation system 3 of this embodiment differs in that it has a secondary battery 31 connected in series to the solid oxide fuel cell 11 . In the description below, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof is omitted.

FIG. 3 is a diagram showing an example of the configuration of the marine power generation system 3, which mainly includes a solid oxide fuel cell 11, diesel engine generators 12 and 13, a control device 14, a secondary battery 31, have

The secondary battery 31 is electrically connected to the solid oxide fuel cell 11 to form a power generator, and the secondary battery 31 is charged by the solid oxide fuel cell 11 while the secondary battery 31 Electric power is supplied to each facility of the ship by the discharge. Also, the secondary battery 31 is preferably a lithium ion battery, but is not limited to this. The outputs of the secondary battery 31 and the solid oxide fuel cell 11 are adjusted according to the ship's power demand. 11 is controlled by a control device 14 so as to generate the minimum amount of power necessary to maintain the operation of auxiliary equipment such as heat exchangers, sensors, combustors, compressors, etc., provided in the solid oxide fuel cell 11 itself. be.

Next, operation of the marine power generation system 3 shown in FIG. 3 will be described with reference to FIG. FIG. 7 is a flow chart showing the operation of the ammonia-equipped ship power generation system 3 .

The controller 14 activates the solid oxide fuel cell 11 . Next, the acquiring unit 14a acquires information on the ship power demand (step S201).

The determination unit 14b determines whether or not the ship power demand exceeds the rated output of the solid oxide fuel cell 11 (step S203).

When the vessel power demand exceeds the rated output of the solid oxide fuel cell 11 (step S203), or when the operation of the solid oxide fuel cell 11 becomes impossible (step S205), the starting unit 14c , the diesel engine generator 12 or 13, or both (step S206). On the other hand, if none of these cases of steps S203 and S205 apply, the diesel engine generators 12 and 13 are not started. Note that the order of steps S203 and S205 may be reversed.

According to the present embodiment, the power supplied from the power generator to be preferentially operated passes through the secondary battery 31, so that the solid oxide fuel cell 11 can Since it is not affected by rapid output fluctuations that cause temperature changes that cause deterioration, that is, it is possible to prevent a decrease in power generation efficiency, it is possible to contribute to preventing an increase in ship fuel costs.

In addition, according to the present embodiment, the power generator that is temporarily operated can be operated at an appropriate timing according to the power demand of the ship, so unnecessary operation can be prevented and excess fuel consumption can be prevented. be able to.

<Fourth Embodiment>
4th Embodiment of the marine power generation system which concerns on this invention is demonstrated centering around a different part from 3rd Embodiment. The marine power generation system 4 of the present embodiment differs in that it has a secondary battery 31 connected in parallel with the solid oxide fuel cell 11 . In the description below, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof is omitted.

FIG. 4 is a diagram showing an example of the configuration of the marine power generation system 4, which mainly includes a solid oxide fuel cell 11, diesel engine generators 12 and 13, a control device 14, a secondary battery 31, have

The secondary battery 31 is electrically connected to the solid oxide fuel cell 11 to form a single power generator, and the secondary battery 31 is charged by the solid oxide fuel cell 11. 12, 13 may be charged. The charging of the secondary battery 31 is performed in parallel with the output from the solid oxide fuel cell 11, for example. Also, the secondary battery 31 is preferably a lithium ion battery, but is not limited to this.

The secondary battery 31 is electrically connected to the control device 14 and supplies power to each facility of the ship according to the flow described later. In addition, the control device 14 further includes a switching section 14d, which is realized by an electric circuit like the other sections.

Next, with reference to FIG. 8, the operation of the ammonia-equipped ship power generation system 4 shown in FIG. 4 will be described. FIG. 8 is a flow chart showing the operation of the marine power generation system 4 .

The controller 14 activates the solid oxide fuel cell 11 . Next, the acquiring unit 14a acquires the ship power demand amount and the information on the increase/decrease amount (steps S301 and S302).

The determination unit 14b determines whether or not the ship power demand exceeds the rated output of the solid oxide fuel cell 11 (step S303), is exceeded (step S304).

Starting unit 14c, when the ship power demand exceeds the rated output of solid oxide fuel cell 11 (Yes in step S303), or when operation of solid oxide fuel cell 11 becomes impossible (step S305 Yes), the diesel engine generator 12 or 13 or both are started (step S306). On the other hand, if none of these cases apply to steps S303 and S305 (No in step S303, No in step S305 (not shown)), the starting unit 14c starts the diesel engine generators 12 and 13. do not start. The order of steps S303, S304, and S305 may be changed.

When the increase/decrease amount exceeds the load change response performance of the solid oxide fuel cell 11 (Yes in step S304), the switching unit 14d supplies power from the secondary battery 31 to each facility of the ship (step S307). . Specifically, the secondary battery 31 supplies power in addition to the power supplied from the solid oxide fuel cell 11, but instead of supplying the additional power, the solid oxide fuel cell 11 It is also possible to supply power by switching from . On the other hand, if the determination result in step S304 is No, the switching unit 14d does not supply power from the secondary battery 31. FIG.

According to this embodiment, the solid oxide fuel cell 11 supplies power to each facility of the ship, and when a sudden output fluctuation occurs, the secondary battery 31 supplies power to each facility of the ship. Therefore, the solid oxide fuel cell 11 can continuously supply electric power to each facility of the ship at an output within a certain range.

<Fifth Embodiment>
FIG. 5 shows an example of the configuration of a fifth embodiment of a marine power generation system according to the present invention.

According to this embodiment, as the fuel of the solid oxide fuel cell 11 that preferentially operates, it is possible to effectively utilize the ammonia mounted on the ship as the fuel of the main engine or the cargo, and biodiesel fuel Since the tank can be made smaller, it can contribute to the reduction of equipment costs related to the biodiesel fuel tank. Furthermore, since fluctuations in the output of the solid oxide fuel cell 11 can be suppressed, it is possible to maintain operation at an optimum output from the viewpoint of power generation efficiency, which can contribute to reducing the fuel cost of ships.

<Other embodiments>
Another aspect of the present invention is the marine power generation method according to the above aspect. In the power generation method of the present embodiment, the control step can be performed, for example, by operating the marine power generation system, and part of it may be performed by an operator.
The method of the present embodiment can reduce costs required during the life of the vessel, including equipment costs and operating costs including fuel costs required during the life of the vessel. In addition, the second power generator or third power generator, which is temporarily operated, can be operated at an appropriate timing according to the power demand and the amount of increase or decrease, preventing excess fuel consumption of high-cost biodiesel fuel. be able to.

Another aspect of the present invention is a control program for the marine power generation system according to the above aspect. The control program of the present embodiment is stored, for example, in the memory of the control device of the marine power generation system and executed by a computer.
With the program of the present embodiment, it is possible to reduce costs required during the operating period of the vessel, including equipment costs and operating costs including fuel costs required during the operating period of the vessel. In addition, the second power generator or third power generator, which is temporarily operated, can be operated at an appropriate timing according to the power demand and the amount of increase or decrease, preventing excess fuel consumption of high-cost biodiesel fuel. be able to.

In the marine power generation system described above, either one of the solid oxide fuel cell 11 and the power generator other than the solid oxide fuel cell 11 can be operated alone, or both can be operated in combination. . In addition, the above-described embodiments are shown as examples and are not intended to limit the scope of the invention, and can be implemented in various other forms without departing from the gist of the invention. Various omissions, substitutions, and alterations may be made to the extent. The embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

In addition, the program for realizing the operations appearing in the present embodiment may be provided by being stored in a computer-readable non-temporary recording medium, or may be provided by being downloadable from an external server. Alternatively, it may be provided so that the program is activated by an external computer and the function is realized by the client terminal (so-called cloud computing).

1, 2, 3, 4, 5 Marine Power Generation System 6 Ammonia Tanks 7, 8 Ammonia Decomposer 11 Solid Oxide Fuel Cells 12, 13 Diesel Engine Generators 12a, 13a Diesel Engines 12b, 13b, 22b, 23b Generators 14 Control device 14a Acquisition unit 14b Determination unit 14c Starting unit 14d Switching unit 22, 23 Dual fuel engine generators 22a, 23a Dual fuel engine 31 Secondary battery

Claims (16)

A power generation system for generating electric power for use in an ammonia-equipped ship carrying ammonia as a fuel or cargo for the main engine, which is the engine that propels the ship ,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
When the power demand of the ship exceeds the rated output of the solid oxide fuel cell, the control device increases or decreases the amount of power demand of the ship per unit time to that of the solid oxide fuel cell per unit time. A marine power generation system that operates only the first power generation device of the power generation devices, except when an output fluctuation value exceeds an allowable range and when the operation of the solid oxide fuel cell becomes impossible. 2. The marine power generation system according to claim 1, wherein said internal combustion engine is a diesel engine. The marine power generation system according to claim 1 or 2 , wherein the first power generation device further includes a secondary battery. A power generation system for producing electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The control device is
an acquisition unit configured to acquire information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination unit configured to determine whether or not;
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, an activation unit configured to activate at least one power generator other than the first power generator only in any of the cases of;
A marine power generation system. A power generation system for producing electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The first power generator further has a secondary battery,
The control device is
an acquisition unit configured to acquire ship power demand information;
a determination unit configured to determine whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a starter configured to start at least one power plant other than
has
The electric power is used in equipment of the ammonia ship,
The marine power generation system, wherein the secondary battery is connected to the solid oxide fuel cell so that power is supplied from the solid oxide fuel cell to the equipment via the secondary battery. A power generation system for producing electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a plurality of power plants including at least a second power plant configured to generate power using
a control device configured to control the operation of each of the power generators to generate the electric power, and preferentially operate the first power generator among the power generators;
The first power generator further has a secondary battery,
The control device is
an acquisition unit configured to acquire information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination unit configured to determine whether or not;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a starter configured to start at least one power plant other than
a switching unit configured to supply power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
A marine power generation system. A power generation method for generating electricity for use in an ammonia-equipped ship equipped with ammonia as a fuel or cargo for the main engine , which is the engine that propels the ship, comprising :
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
In the control step, when the ship's power demand exceeds the rated output of the solid oxide fuel cell, the amount of increase or decrease in the ship's power demand per unit time is increased or decreased per unit time of the solid oxide fuel cell. A power generation method for ships, wherein only the first power generation device of the power generation devices is operated except when the allowable range of the output fluctuation value is exceeded and when the operation of the solid oxide fuel cell is disabled. The marine power generation method according to claim 7 , wherein the internal combustion engine is a diesel engine. The ship power generation method according to claim 7 or 8 , wherein the first power generation device further includes a secondary battery. 1. A power generation method for producing electricity for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, a starting step of starting at least one power generating device other than the first power generating device only in either case;
A method for generating power for a ship , comprising: 1. A power generation method for producing electricity for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The first power generator further has a secondary battery,
The control step includes:
an obtaining step of obtaining ship power demand information;
a determination step of determining whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
with
The electric power is used in equipment of the ammonia ship,
The power generation method for ships, wherein the secondary battery is connected to the solid oxide fuel cell so that power is supplied from the solid oxide fuel cell to the equipment via the secondary battery. 1. A power generation method for producing electricity for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators, controlling operation of each of the power generators to generate the electric power; A control step that preferentially operates the power generation device,
The first power generator further has a secondary battery,
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
a switching step of supplying power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
A method for generating power for a ship , comprising: A program for controlling the operation of a power generation system that generates electric power for use in an ammonia-equipped ship equipped with ammonia as a fuel or cargo for the main engine, which is the engine that propels the ship, comprising :
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
In the control step, when the ship's power demand exceeds the rated output of the solid oxide fuel cell, the amount of increase or decrease in the ship's power demand per unit time is increased or decreased per unit time of the solid oxide fuel cell. A marine power generation system that operates only the first power generation device of the power generation devices, except when the output fluctuation value exceeds the allowable range and when the operation of the solid oxide fuel cell becomes impossible. Control program. 1. A program for controlling the operation of a power generation system that produces electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The control step includes:
an acquisition step of acquiring information on each of a ship's power demand and an increase/decrease amount of the ship's power demand per unit time;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
If the ship's power demand exceeds the rated output of the solid oxide fuel cell, if the increase or decrease exceeds the allowable range, and if the solid oxide fuel cell becomes inoperable, a starting step of starting at least one power generating device other than the first power generating device only in either case;
A program for controlling a marine power generation system, comprising: 1. A program for controlling the operation of a power generation system that produces electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The control step includes:
an obtaining step of obtaining ship power demand information;
a determination step of determining whether the ship power demand exceeds the rated output of the solid oxide fuel cell;
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
A program for controlling a marine power generation system, comprising: 1. A program for controlling the operation of a power generation system that produces electrical power for use in an ammonia-equipped ship carrying ammonia as main engine fuel or cargo, comprising:
to the computer,
A first power generation device having a solid oxide fuel cell that uses as fuel gas a gas mainly composed of hydrogen generated by decomposing a part of the ammonia, and an internal combustion engine, and power generated by the internal combustion engine. a second power generator configured to generate power using a plurality of power generators of the power generation system, controlling operation of each of the power generators to generate the power; Execute a control step of preferentially operating the first power generator among
The first power generator further has a secondary battery,
The control step includes:
an acquisition step of acquiring information on each of a ship power demand and an increase/decrease amount of the ship power demand;
Whether the ship's power demand exceeds the rated output of the solid oxide fuel cell, and whether the amount of increase or decrease exceeds the permissible range of output fluctuation value per unit time of the solid oxide fuel cell a determination step for determining whether or not
The first power generation device only when the ship's power demand exceeds the rated output of the solid oxide fuel cell or when the solid oxide fuel cell becomes inoperable a start-up step of starting at least one power plant other than
a switching step of supplying power from the secondary battery to the ship when the amount of increase or decrease exceeds the allowable range;
A program for controlling a marine power generation system, comprising:

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