KR102121288B1 - Ship - Google Patents

Abstract

The present invention is installed on the hull, a water supply unit for supplying water, a plurality of auxiliary engines installed to be spaced apart from the water supply unit to produce electricity, and the auxiliary engine exhaust gas discharged from the auxiliary engines as the heat source A plurality of economizers for generating steam (H ₂ O) required by the customer by heating the water supplied from the heater, installed to be connected to the economizers and using electricity to heat the water supplied from the water supply unit to steam (H ₂ O), an electric heater for generating fuel, a branch part for branching the fuel supplied to the auxiliary engine from a fuel storage tank for storing fuel, and electricity using the fuel supplied from the branch part and steam supplied from the economizer It includes a fuel cell system for producing, the fuel cell system is a hydrogen generator including a reformer and a combustor for reforming the fuel supplied from the branch and the steam supplied from the economizer, and the anode (Anode), the cathode (Cathode), and includes a fuel cell for producing electricity, including an electrolyte formed between the anode (Anode) and the cathode (Cathode), the steam (H ₂ O) generated in the electric heater is the plurality of economizers The fuel cell exhaust gas supplied to at least one of the fuel cells and discharged from the fuel cell joins the auxiliary engine exhaust gas supplied from the auxiliary engine to the economizer to increase the amount of exhaust gas supplied to at least one of the plurality of economizers. It relates to a vessel characterized in that it is supplied to the economizer.

Description

Ship{Ship}

The present invention relates to a ship for transporting people, cargo, and the like from water such as rivers and seas to a destination.

2. Description of the Related Art In general, a ship is a means that can be moved in water using a power means, and is used in various fields such as a transport ship for transporting passengers, cargo, etc. to a destination, a fishing boat for catching fishery products, and a warship made for military purposes. In such ships, the main engine for rotating a propulsion device such as a propeller, an auxiliary engine for producing electricity used by electric devices installed on the ship, and steam using the exhaust gas discharged from the main engine and the auxiliary engine, respectively (H ₂ O ), an economizer for producing, and a main turbine for producing electricity with steam discharged from the economizer are installed. Since the auxiliary engine has a smaller capacity than the main engine, a plurality of auxiliary engines are installed. The economizer is installed so that a plurality of them are connected to the engines, respectively, and the exhaust gas discharged from each engine is heated with water as a heat source to change to steam (H ₂ O). Steam (H ₂ O) produced through the economizer is used for heating, fuel oil heating, electricity production, and the like.

On the other hand, when the main engine is not running, the ship produces steam (H ₂ O) and electricity using the auxiliary engine. For example, when the ship is not sailing and is moored in a port, some of the auxiliary engines are used to produce steam (H ₂ O) and electricity. However, there is a problem that some auxiliary engines do not satisfy the demand for steam (H ₂ O) and electricity.

The ship according to the prior art additionally installs an auxiliary boiler on the hull to solve the above problems. The auxiliary boiler heats water with heat generated when combusting fuel to produce steam (H ₂ O), and then additionally supplies the produced steam (H ₂ O) to the consumer or steams the economizer connected to the auxiliary engine. Supply (H ₂ O) to increase electricity production. However, the ship according to the prior art has the following problems.

First, the ship according to the prior art has a large size of the auxiliary boiler since the auxiliary boiler must be supplied with fuel and burned. Accordingly, the ship according to the prior art has a problem that the space occupied by the auxiliary boiler is increased in the hull where space is limited, and thus the loss of space for the hull is increased due to the auxiliary boiler, thereby deteriorating space utilization for the hull.

Second, since the ship according to the prior art has a large size of the auxiliary boiler, the spaced apart from the devices installed around it is narrow. Accordingly, since the ship according to the prior art is difficult to enter the operator between the auxiliary boiler and the peripheral device, there is a problem that it is difficult to perform maintenance and replacement work for the auxiliary boiler and peripheral devices.

The present invention has been devised to solve the problems as described above, and is to provide a vessel capable of supplying a sufficient amount of steam (H ₂ O) and electricity even during anchoring without deteriorating space utilization for the hull.

In order to solve the problems as described above, the present invention may include the following configuration.

The ship according to the present invention is installed on the hull and the water supply unit for supplying water; A plurality of auxiliary engines spaced apart from the water supply unit and for generating electricity; A plurality of economizers for generating steam (H ₂ O) required by a customer by heating the water supplied from the water supply unit by using the auxiliary engine exhaust gas discharged from the auxiliary engines as a heat source; An electric heater installed to be connected to the economizers and generating steam (H ₂ O) by heating water supplied from the water supply unit using electricity; A branching unit for branching fuel supplied from the fuel storage tank for storing fuel to the auxiliary engine; And a fuel cell system that generates electricity using fuel supplied from the branch and steam supplied from the economizer. The fuel cell system includes a hydrogen generator including a reformer and a combustor for reforming the fuel supplied from the branch and the steam supplied from the economizer; And an anode, an anode, and an electrolyte formed between the anode and the anode, to produce electricity. Steam (H ₂ O) generated in the electric heater may be supplied to at least one of the plurality of economizers. The fuel cell exhaust gas discharged from the fuel cell is joined to the auxiliary engine exhaust gas supplied from the auxiliary engine to the economizer so that the amount of exhaust gas supplied to at least one of the plurality of economizers increases and may be supplied to the economizer. have.

In the ship according to the present invention, the electric heater may heat water supplied from the water supply unit using electricity produced by at least one of the plurality of auxiliary engines and the fuel cell.

The ship according to the present invention may include a power storage unit for storing electricity produced by at least one of the plurality of auxiliary engines and the fuel cell. The electric heater is installed to be connected to the electric power storage unit, but when the amount of steam (H ₂ O) required by the customer exceeds a predetermined reference steam demand, steam (H) is used by using electricity stored in the electric power storage unit. ₂ O).

The fuel cell system according to the present invention provides fuel supplied from a branch that branches off fuel supplied to a plurality of auxiliary engines for producing electricity in a fuel storage tank for storing fuel and auxiliary engine exhaust gas discharged from the auxiliary engines Hydrogen generation including a reformer and a combustor for reforming the steam supplied from a plurality of economizers to generate steam (H ₂ O) required by a customer by heating water supplied from a water supply unit for supplying water to a heat source part; And an anode, an anode, and an electrolyte formed between the anode and the anode, to produce electricity. The steam (H ₂ O) generated in an electric heater for generating steam (H ₂ O) by heating water supplied from the water supply unit by using electricity is installed to be connected to the economizers, among the plurality of economizers It can be supplied to at least one. The fuel cell exhaust gas discharged from the fuel cell is joined to the auxiliary engine exhaust gas supplied from the auxiliary engine to the economizer so that the amount of exhaust gas supplied to at least one of the plurality of economizers increases and may be supplied to the economizer. have.

In the fuel cell system according to the present invention, the electric heater may heat water supplied from the water supply unit using electricity produced by at least one of the plurality of auxiliary engines and the fuel cell.

The fuel cell system according to the present invention may include a plurality of auxiliary engines and a power storage unit for storing electricity produced by at least one of the fuel cells. The electric heater is installed to be connected to the electric power storage unit, but when the amount of steam (H ₂ O) required by the customer exceeds a predetermined reference steam demand, steam (H) is used by using electricity stored in the electric power storage unit. ₂ O).

According to the present invention, the following effects can be obtained.

The present invention is implemented to produce electricity using a fuel cell, and not only can increase the amount of electricity produced, but also combines the fuel cell exhaust gas discharged from the fuel cell with the auxiliary engine exhaust gas discharged from the auxiliary engine and supplies it to the economizer. By being implemented it is possible to increase the production of steam (H ₂ O).

Since the present invention is implemented to produce steam (H ₂ O) using an electric heater and a fuel cell, not only can a sufficient amount of steam (H ₂ O) be supplied to the customer at the time of anchoring, but also the auxiliary boiler can be omitted. By increasing the space utilization for the hull, it is possible to increase the load of passengers and cargo.

In the present invention, since the electric heater is smaller in size than the auxiliary boiler, the spaced apart from the peripheral devices can be widened, so that the maintenance work and replacement work for the electric heater and peripheral devices can be easily performed.

1 is a schematic block diagram of a ship according to the invention
2 is a conceptual configuration diagram of an entire system according to the present invention
3 is a conceptual configuration diagram of a fuel cell system according to the present invention
4A and 4B are exemplary views for explaining the operation of the fuel cell used in the present invention, and FIG. 4A is a conceptual configuration diagram of a solid oxide fuel cell (SOFC)
4B is a conceptual configuration diagram of a polymer electrolyte fuel cell (PEMFC).
5 is an exemplary view for explaining a hydrogen generating unit according to an embodiment of the present invention
6 is a conceptual configuration diagram of a ship according to the present invention
7 is a schematic block diagram for explaining a fuel cell system in a ship according to the present invention
8 is a schematic block diagram illustrating a case in which only a part of a plurality of auxiliary engines is operated in a ship according to the present invention
9 is a schematic block diagram for explaining a power storage unit in a ship according to the present invention

It should be noted that in this specification, when adding reference numerals to components of each drawing, the same components have the same number as possible, even if they are displayed on different drawings.

On the other hand, the meaning of the terms described in this specification should be understood as follows.

It should be understood that a singular expression includes a plurality of expressions unless the context clearly defines otherwise, and the terms "first", "second", etc. are intended to distinguish one component from another component, The scope of rights should not be limited by these terms.

It should be understood that terms such as “include” or “have” do not preclude the existence or addition possibility of one or more other features or numbers, steps, actions, components, parts or combinations thereof.

It should be understood that the term “at least one” includes all possible combinations from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” means 2 of the first item, the second item, or the third item, as well as each of the first item, the second item, and the third item. Any combination of items that can be presented from more than one dog.

Hereinafter, a ship according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a ship according to the present invention, FIG. 2 is a conceptual configuration diagram of an entire system according to the present invention, and FIG. 3 is a conceptual configuration diagram of a fuel cell system according to the present invention, FIGS. 4A and 4B Is an exemplary view for explaining the operation of the fuel cell used in the present invention, Figure 4a is a conceptual configuration diagram of a solid oxide fuel cell (SOFC), Figure 4b is a conceptual diagram of a polymer electrolyte fuel cell (PEMFC), 5 is an exemplary view for explaining a hydrogen generating unit according to an embodiment of the present invention.

1 to 5, the ship 1 according to the present invention is for sufficiently supplying steam (H ₂ O) and electricity even when only a part of a plurality of auxiliary engines installed on the hull is operated. In particular, the ship 1 according to the present invention can not only increase the amount of electricity produced by using a fuel cell, but also combine the fuel cell exhaust gas discharged from the fuel cell with the auxiliary engine exhaust gas discharged from the auxiliary engine to the economizer. By being implemented to supply it can increase the production of steam (H ₂ O). In addition, the ship 1 according to the present invention can increase the space utilization of the hull compared to the case of using the auxiliary boiler by using an electric heater having a smaller size than the auxiliary boiler, and the surroundings installed around the electric heater and the electric heater It is possible to smoothly perform maintenance and replacement work for the devices.

1 to 5, the ship 1 according to the present invention is a power generation system 10 is installed on the hull (11). The hull 11 forms the overall appearance of the vessel 1 according to the invention. The power generation system 10 largely includes an engine exhaust system 100 and a fuel cell system 7. The engine exhaust system 100 may include a main engine 101, a main economizer 102, a steam turbine 103, an auxiliary engine 3 and an economizer 4. The main engine 101 is installed to be connected to the main economizer 102, and the main economizer 102 is installed to be connected to the steam turbine 103. The auxiliary engine 3 is installed to be connected to the economizer 4. A plurality of auxiliary engines 3 and the economizer 4 may be respectively installed on the hull 11. Here, the main engine 101 and the auxiliary engine 3 may be a diesel engine or a gas engine. The fuel cell system 7 largely includes a fuel cell 71 and a hydrogen generator 72. The fuel cell system 7 may be implemented by including a control unit 73 that controls the operation of all components including the fuel cell 71 and the hydrogen generating unit 72.

The power generation system 10 includes an engine exhaust system 100, a fuel storage tank 20, an air supply unit 30, a power conversion unit 40, a water supply unit 2, an electric heater 5, and a branch unit ( 6) is further included.

The fuel cell system 7 according to the present invention is implemented to receive fuel from the hydrogen generating unit 72 and the hydrogen generating unit 72 to receive fuel from the fuel storage tank 20 storing fuel. When the engine is a diesel engine 101, the hydrogen generating unit 72 may receive diesel fuel stored in the fuel storage tank 20 through the branch unit 6. In the fuel cell system 7 according to the present invention, when the engine is a gas engine, gas fuel stored in the fuel storage tank 20 is directly supplied through the branch 6 without passing through the hydrogen generator 72. It might be.

The engine exhaust system 100 includes a main engine 101, a main economizer 102, a steam turbine 103, a plurality of auxiliary engines 3 and a plurality of economizers 4.

The engine exhaust system 100 is a component included in a power generation system using an engine, and purifies exhaust gas containing environmental pollutants such as nitrogen oxides (NOx) generated in the engine combustion chamber and recovers heat of the exhaust gas. It is a device that discharges to the outside. The engine exhaust system 100 may be provided with a selective catalytic reduction (SCR) reactor to reduce nitrogen oxides (NOx) contained in exhaust gas.

The main engine 101 generates exhaust gas as fuel and air are mixed and burned. The main economizer 102 may generate steam (H ₂ O) by heating the water supplied from the water supply unit 2 using the main engine exhaust gas discharged from the main engine 101. Since the main engine exhaust gas discharged from the main engine 101 is high temperature, it may be a heat source for heating water. Steam (H ₂ O) generated in the main economizer 102 may be supplied to the steam turbine 103. The steam turbine 103 may generate electricity by driving a main generator (not shown) using steam (H ₂ O) supplied from the main economizer 102. The electricity produced by the main generator may be supplied to the electric device installed in the hull 11 and the electric heater 5. The steam (H ₂ O) that produces and discharges electricity from the steam turbine 103 may be supplied to a customer (50, shown in FIG. 7). The consumer 50 may receive steam (H ₂ O) and use variously. For example, the consumer 50 may use steam (H ₂ O) as a heat source for heating, heating fuel oil, and the like.

The main engine 101 is operated when the ship 1 is sailing, and is not operated when the ship 1 is anchored in the port. This is because it is not necessary to operate the propulsion device when the ship 1 is moored at the port. Accordingly, when the ship 1 is moored at the port, since the exhaust gas is not discharged from the main engine 101, the main economizer 102 cannot generate steam (H ₂ O). Accordingly, in this case, some of the plurality of auxiliary engines 3 for generating electricity are operated to heat the water from the auxiliary engine exhaust gas discharged from the auxiliary engine 3 as a heat source to generate steam (H ₂ O). Can be. However, in this case, if the amount of steam (H ₂ O) required by the demand source 50 is large, the auxiliary engine 3 alone may not be able to meet the demand. In order to solve this problem, the ship 1 according to the present invention may additionally supply steam (H ₂ O) by heating water with the electric heater 5. In addition, the ship 1 according to the present invention is implemented by supplying the fuel cell exhaust gas discharged from the fuel cell 71 with the auxiliary engine exhaust gas and supplying it to the economizer 4, so that the economizer 4 is supplied. Steam (H ₂ O) production can be increased by increasing the flow rate of the exhaust gas. Accordingly, the ship 1 according to the present invention can supply a sufficient amount of steam (H ₂ O) to the demand destination 50, so it can satisfy the demand of the demand destination 50. Here, generating steam (H ₂ O) means that water is heated by a heat source to phase change to steam (H ₂ O).

The main engine 101, the auxiliary engine 3 and the fuel cell system 7 may be supplied with fuel from a fuel storage tank 20 for storing fuel. When the engine is a diesel engine 101, the diesel engine 101 may be supplied with diesel fuel from the fuel storage tank 20. The diesel fuel is marine gas oil (MGO), marine diesel oil (MDO), heavy fuel oil (HFO), methanol, dimethyl ether (DME), and liquefied petroleum gas (LPG) ). A branch 6 for supplying fuel to the fuel cell system 7 may be installed between the fuel storage tank 20 and the auxiliary engine 3.

The air supply unit 30 supplies air to the main engine 101, the auxiliary engine 3 and the fuel cell system 7. Normally, air means a gas containing nitrogen, oxygen, carbon dioxide, etc., but also includes the case where all gases other than oxygen such as nitrogen or carbon dioxide or two gases are removed from the air. The air supply unit 30 may be implemented to supply compressed air under high pressure or to normal pressure after being compressed by receiving external air. The air supply unit 30 may include a conduit through which air moves, and a conveying device such as a compressor or an impeller that generates a conveying force for moving air.

The power conversion unit 40 converts the direct current (DC) from the fuel cell system 7 according to the present invention into an alternating current (AC). The power conversion unit 40 is a DC-AC converter for converting a DC-DC converter and a DC current (DC) into AC current (AC) for boosting or reducing the output voltage from the fuel cell system 7 according to the present invention. It may be composed of an inverter or the like. The power conversion unit 40 discharges the electricity supplied from the fuel cell system 7 according to the present invention to the demand destination 50. Although not illustrated, the power conversion unit 40 may be implemented to transmit and store electricity with an energy storage device, for example, a battery.

The demand source 50 can be used by receiving steam (H ₂ O) and electricity. For example, the demand source 50 may be supplied with steam (H ₂ O) from the main economizer 102, the economizer 4, and the electric heater 5. Accordingly, the demand source 50 can use steam (H ₂ O) as a heat source for heating, heating fuel oil, and the like. The demand source 50 may be supplied with electricity produced by the steam turbine 103, the auxiliary engine 3, and the fuel cell system 7. The demand source 50 can use the electricity supplied to the ship's electrical equipment, such as the ship's basic electrical equipment and cargo system electrical equipment.

The water supply part 2 is for supplying water. For example, the water supply unit 2 may supply water to the main economizer 102, the economizer 4, and the electric heater 5. The water supply unit 2 is installed on the hull. The water supply unit 2 may supply water to the main economizer 102, the economizer 4, and the electric heater 5 by sucking water located outside the hull. The water supply unit 2, when a water storage tank for storing water is installed inside the hull, sucks the water stored in the water storage tank, the main economizer 102, the economizer 4, and an electric heater ( 5) may be supplied with water. The water supply unit 2 may include a conduit for moving water, and a pump that generates a transport force to move water along the conduit. The water supply unit 2 may be connected to the main economizer 102, the economizer 4, and the electric heater 5 through a pipe or a pipe. Accordingly, the water supply unit 2 may supply water to the main economizer 102, the economizer 4, and the electric heater 5, respectively. The water supply unit 2 does not supply water to the main economizer 102 when the ship 1 is moored at the port, and can supply water only to the economizer 4 and the electric heater 5. .

The auxiliary engine 3 is for producing electricity. The auxiliary engine 3 may be installed on the hull so as to be spaced apart from the water supply unit 2. Since the auxiliary engine 3 is a power generation engine for producing electricity, it has a smaller capacity than the main engine 101 which is a propulsion engine. Accordingly, a plurality of auxiliary engines 3 may be installed on the hull. For example, the auxiliary engine 3 may include a first auxiliary engine 31 and a second auxiliary engine 32. The auxiliary engine 3 may further include a plurality of auxiliary engines such as a third auxiliary engine and a fourth auxiliary engine in addition to the first auxiliary engine 31 and the second auxiliary engine 32. In this specification, it will be described as an example that the auxiliary engine 3 includes the first auxiliary engine 31 and the second auxiliary engine 32. The first auxiliary engine 31 and the second auxiliary engine 32 are configured to include a first generator and a second generator, respectively, so that the generators can generate electricity when activated. Since the auxiliary engine 3 includes the first auxiliary engine 31 and the second auxiliary engine 32, the economizer 4 is a first economizer installed to be connected to the first auxiliary engine 31. (41), and a second economizer 42 installed to be connected to the second auxiliary engine 32.

The first auxiliary engine 31 is supplied with fuel and air, is mixed and burned to generate driving force, so that the first generator can generate electricity. The first auxiliary engine 31 may receive fuel from the fuel storage tank 20 and receive air from the air supply unit 30. The first auxiliary engine 31 may be operated when the ship 1 is moored, but is not limited thereto, and may be operated even when the ship 1 is sailing. Electricity produced by the first generator may be supplied to at least one of the electric heater 5 and the customer 50. When the first auxiliary engine 31 is operated, auxiliary engine exhaust gas may be discharged from the first auxiliary engine 31. The high-temperature auxiliary engine exhaust gas discharged from the first auxiliary engine 31 may be supplied to the first economizer 41 through a pipeline.

The second auxiliary engine 32 is supplied with fuel and air, is mixed and burned to generate driving force, so that the second generator can generate electricity. The second auxiliary engine 33 may receive fuel from the fuel storage tank 20 and receive air from the air supply unit 30. The second auxiliary engine 32 may be operated when the ship 1 is moored, but is not limited thereto, and may be operated even when the ship 1 is sailing. The electricity produced by the second generator may be supplied to at least one of the electric heater 5 and the customer 50. When the second auxiliary engine 32 is operated, auxiliary engine exhaust gas may be discharged from the second auxiliary engine 32. A high temperature auxiliary engine exhaust gas discharged from the second auxiliary engine 32 may be supplied to the second economizer 42 through a pipeline. The first auxiliary engine 31 and the second auxiliary engine 32 may all be operated or only one may be operated depending on the amount of fuel stored in the hull. For example, if the amount of stored fuel is large, both the first auxiliary engine 31 and the second auxiliary engine 32 may be operated. In addition, both the first auxiliary engine 31 and the second auxiliary engine 32 may be operated even when the amount of steam (H ₂ O) required by the demand source 50 is large. However, when the ship 1 is moored at the port, the first auxiliary engine 31 and the second auxiliary engine 32 to minimize the emission of harmful substances such as nitrogen oxides (NOx) and sulfur oxides (SOx) ) Can be operated. This is because the port is included in a strict zone with restrictions on environmental pollution. For example, the port may be included in an Emission Restriction Area (ECA) where emissions of pollutants are restricted. Accordingly, the ship 1 according to the present invention uses an electric heater 5 that heats water using electricity even if only one of the first auxiliary engine 31 and the second auxiliary engine 32 is operated. By additionally supplying steam (H ₂ O), not only can the demand 50 be satisfied, but also the regulation of environmental pollution can be satisfied. In addition, the ship 1 according to the present invention, by combining the fuel cell exhaust gas discharged from the fuel cell 7 to the auxiliary engine exhaust gas to be supplied to the economizer 4, the economizer 4 is produced The amount of steam (H ₂ O) can be increased.

The economizer 4 is for generating steam (H ₂ O). The economizer 4 may be installed to be connected to the auxiliary engine 3 and the water supply part 2 through a pipeline. Accordingly, the economizer 4 may be supplied with high-temperature auxiliary engine exhaust gas from the auxiliary engine 3 and may be supplied with water from the water supply unit 2. The economizer 4 can heat water by installing a pipeline through which water supplied from the water supply unit 2 flows inside a pipeline from which the auxiliary engine exhaust gas discharged from the auxiliary engine 3 is discharged. . Therefore, the economizer 4 may generate steam (H ₂ O) by heating the water supplied from the water supply unit 2 with the exhaust gas discharged from the auxiliary engine 3 as a heat source. A plurality of the economizers 4 may be installed. For example, the economizer 4 may include a first economizer 41 and a second economizer 42.

The first economizer 41 may be installed to be connected to the water supply unit 2, the first auxiliary engine 31, and the demand source 50 through a pipeline. Accordingly, the first economizer 41 may receive water from the water supply unit 2 and receive auxiliary engine exhaust gas from the first auxiliary engine 31. The first economizer 41 may heat the water supplied from the water supply unit 2 using the auxiliary engine exhaust gas discharged from the first auxiliary engine 31 as a heat source. Accordingly, the first economizer 41 may generate steam (H ₂ O). Steam (H ₂ O) generated in the first economizer 41 may be supplied to the customer 50 through a pipeline. The auxiliary engine exhaust gas that heats water in the first economizer 41 may be discharged to the outside of the hull. The auxiliary engine exhaust gas that heats and discharges water from the first economizer 41 may be flue gas.

The second economizer 42 may be installed to be connected to the water supply unit 2, the second auxiliary engine 32, and the customer 50 through a pipeline. Accordingly, the second economizer 42 may receive water from the water supply unit 2 and receive auxiliary engine exhaust gas from the second auxiliary engine 32. The second economizer 42 may heat the water supplied from the water supply unit 2 using the auxiliary engine exhaust gas discharged from the second auxiliary engine 32 as a heat source. Accordingly, the second economizer 42 may generate steam (H ₂ O). Steam (H ₂ O) generated in the second economizer 42 may be supplied to the steam storage unit 6 through a pipeline. The auxiliary engine exhaust gas that heats water in the second economizer 42 may be discharged to the outside of the hull. The auxiliary engine exhaust gas that heats and discharges water from the second economizer 42 may be a flue gas.

The first economizer 41 and the second economizer 42 may be operated as the first auxiliary engine 31 and the second auxiliary engine 32 are operated. That is, when the first auxiliary engine 31 is operated, the first economizer 41 may be operated. When the second auxiliary engine 32 is operated, the second economizer 42 may be operated. When the ship 1 is moored at the port, only one of the first auxiliary engine 31 and the second auxiliary engine 32 operates, so the first economizer 41 and the second economizer 42 ) Can be operated. In this case, the water supply unit 2 can supply water only to an economizer in operation. Accordingly, the water supplied to the economizer that is operated may be generated as steam (H ₂ O) and supplied to the customer 50. The first economizer 41 and the second economizer 42 may be connected to the electric heater 5 by connecting the electric heater 5 to a pipe connected to the water supply unit 2 through the pipe. Accordingly, at least one of the first economizer 41 and the second economizer 42 may be supplied with steam (H ₂ O) produced by the electric heater 5.

The electric heater 5 is for generating steam (H ₂ O) using electricity. The electric heater 5 may be installed to be connected to the first economizer 41 and the second economizer 42, respectively. In addition, the electric heater 5 may be connected to the water supply unit 2 through a pipeline. Accordingly, the electric heater 5 may generate steam (H ₂ O) by heating water supplied from the water supply unit 2 using electricity. The electric heater 5 can heat the water by raising the temperature of the heating element such as a heating wire by using electricity to contact the heating element with water. Steam (H ₂ O) generated in the electric heater 5 may be supplied to at least one of the first economizer 41 and the second economizer 42 through a pipeline. In this case, the steam (H ₂ O) generated in the electric heater 5 is the water supply unit 2, the first economizer 41 and the second economizer 42 through a pipe line connecting the agent It may be supplied to at least one of the 1 economizer 41 and the second economizer 42. Accordingly, water supplied from the water supply unit 2 to the first economizer 41 and the second economizer 42 is joined by joining the steam (H ₂ O) generated in the electric heater 5. The temperature may be higher than before. Therefore, the ship 1 according to the present invention by increasing the temperature of the water supplied to the first economizer 41 and the second economizer 42 in advance, the first economizer 41 and the second economizer 42 ) Can increase the amount of steam (H ₂ O) produced. Steam (H ₂ O) generated by the first economizer 41 and the second economizer 42 may be supplied to the customer 50. In addition, the ship 1 according to the present invention by raising the temperature of the water supplied to the first economizer 41 and the second economizer 42 in advance, the first economizer 41 and the second economizer 42 ) Can reduce the load required to generate steam (H ₂ O). Therefore, since the ship 1 according to the present invention can extend the service life of the first economizer 41 and the second economizer 42, the first economizer 41 and the second economizer 42 ) Can reduce maintenance and replacement costs. Only one electric heater 5 may be installed, but a plurality of electric heaters 5 may be installed to increase the amount of steam (H ₂ O).

The electric heater 5 may be connected to the first auxiliary engine 31, the second auxiliary engine 32, and the fuel cell 71, respectively. Specifically, the electric heater 5 may be connected to the first generator of the first auxiliary engine 31, the second generator of the second auxiliary engine 32, and the fuel cell 71, respectively. Accordingly, the electric heater 5 may be supplied with electricity produced by at least one of the first auxiliary engine 31, the second auxiliary engine 32, and the fuel cell 71. The electric heater 5 may heat the water supplied from the water supply unit 2 using the supplied electricity. Therefore, since the ship 1 according to the present invention does not need to separately install a power generation device for supplying electricity to the electric heater 5, it is possible not only to increase space utilization for the hull, but also to the electric heater 5 The installation cost for supplying electricity can be reduced.

Since the electric heater 5 does not need a chamber in which fuel and air are mixed and burned like an auxiliary boiler, it is smaller in size than the auxiliary boiler. Accordingly, the ship 1 according to the present invention can not only be easily installed in the space where the electric heater 5 is smaller than the auxiliary boiler, but also can lower the specific gravity occupied by the hull compared to the auxiliary boiler. Therefore, the space utilization of the hull can be increased. In addition, since the ship 1 according to the present invention can widen the spaced apart from the peripheral devices installed around the electric heater 5 compared to the auxiliary boiler, the operator between the electric heater 5 and the peripheral devices Easy to enter and exit, it is possible to smoothly perform maintenance work and replacement work for the electric heater 5 and peripheral devices. Accordingly, the ship 1 according to the present invention can shorten the maintenance work time and the replacement work time for the electric heater 5 and peripheral devices, thereby preventing the operation time from being delayed.

The branch part 6 is installed to be located between the fuel storage tank 20 and the auxiliary engine 3. The branch part 6 may branch the fuel supplied from the fuel storage tank 20 to the auxiliary engine 3. The branch 6 is supplied from the fuel storage tank 20 to the auxiliary engine 3 to be supplied to the auxiliary engine 3, the reformer 721 and the combustor 722 of the fuel cell system 7, respectively. The supplied fuel can be diverged. The branch part 6 may be connected to the auxiliary engine 3, the reformer 721, and the combustor 722 through pipes such as pipes or pipes, respectively. The branch part 6 opens or closes the flow paths of the pipelines, such that fuel stored in the fuel storage tank 20 is at least one of the auxiliary engine 3, the reformer 721, and the combustor 722. Can be supplied. For example, the branch part 6 may be a three way valve. Accordingly, the reformer 721 may receive some of the fuel supplied from the fuel storage tank 20 to the auxiliary engine 3. The reformer 721 may receive the remaining fuel except for the fuel supplied to the auxiliary engine 3. The branch part 6 may block fuel supplied to the auxiliary engine 3 and allow fuel to be supplied from the fuel storage tank 20 to the reformer 721. Accordingly, the reformer 721 is supplied with a larger amount of fuel than when the residual fuel is supplied, so that a larger amount of hydrogen is contained in the anode 711b of the fuel cell 71 Can supply. Therefore, the fuel cell 71 can produce a larger amount of electricity. The branch part 6 may be installed to be located between the fuel storage tank 20 and the main engine 101.

The fuel cell system 7 according to the present invention produces electricity using fuel, steam (H ₂ O), and air. The ship 1 according to the present invention can supply fuel to the fuel cell system 7 through the branch 6, and steam (H ₂ ) to the fuel cell system 7 through the economizer 4. O) may be supplied, and air may be supplied to the fuel cell system 7 through the air supply unit 30. The air supply unit 30 may supply air to the combustor 722 and the cathode 711a of the fuel cell system 7. Accordingly, the fuel cell system 7 according to the present invention can produce electricity.

The fuel cell system 7 according to the present invention can join the fuel cell exhaust gas discharged from the fuel cell 71 to the auxiliary engine exhaust gas discharged from the auxiliary engine 3 and supplied to the economizer 4. . Accordingly, the economizer 4 can increase the amount of steam (H ₂ O) by increasing the amount of exhaust gas supplied. Therefore, the ship 1 according to the present invention can satisfy the demand of the demand source 50 for steam (H ₂ O) and electricity.

The fuel cell system 7 according to the present invention can be used for small structures such as homes or automobiles, and can be used for large structures such as ships. The fuel cell system 7 according to the present invention may be implemented to interwork with a diesel engine, gas engine, steam turbine, gas turbine, or Rankine Cycle system using combustion energy of fuel.

In this specification, the term “ship” is not limited to a structure that sails on the water, but also a structure that sails on the water, as well as floating oil production storage and unloading facilities (FPSO) that float and work on the water. It includes the same offshore structures.

Hereinafter, a fuel cell system 7 according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 5, the fuel cell system 7 according to the present invention includes a fuel cell 71 and a hydrogen generator 72. The fuel cell system 7 according to the present invention may be implemented by including a control unit 73 that controls the operation of all components including the fuel cell 71 and the hydrogen generating unit 72. In the present specification, what flows into the hydrogen generating unit 72 is defined as raw material and raw water, and what is generated by the hydrogen generating unit 72 and flows into the fuel cell 71 as fuel.

The fuel cell 71 may be supplied with fuel containing hydrogen from the hydrogen generator 72 to produce electricity through an electrochemical reaction. For example, the fuel cell 71 may receive the fuel containing hydrogen from the reformer 721 and produce electricity through electrochemical reaction with air supplied from the air supply unit 30. The fuel cell 71 is implemented by including a fuel cell stack. In the fuel cell stack, an electrolyte layer 711c is formed between the cathode 711a and the anode 711b, and the anode 711b and the cathode 711a are formed in the fuel cell stack. The unit cell module, which is equipped with a separator for hydrogen supply, air supply, and heat recovery, is configured in a series-connected amount. Here, the anode 711b may be supplied with fuel containing hydrogen from the reformer 721. The reformer 721 may produce fuel containing hydrogen by reforming and reacting fuel supplied by branching from the branch 6 and steam (H ₂ O) supplied from the economizer 4. When the engine is a gas engine, the anode 711b may be directly supplied with fuel from the branch 6 without going through the reformer 721.

The fuel cell 71 is a temperature sensor and a device for maintaining temperature. That is, a heater, an anode fan, an anode fan, and a cooling plate may be included. The temperature sensor senses the temperature of the fuel cell stack, the temperature of the cathode 711a, and the temperature of the anode 711b. The fuel cell may be heated by the heater to maintain a temperature required for operation. The cathode fan dissipates heat generated by the cathode (711a) of the fuel cell stack. The anode fan dissipates heat generated by the anode 711b of the fuel cell stack. The cathode fan and the anode fan may be implemented as a part of a heat exchanger used in the fuel cell stack.

When the fuel cell system 7 according to the present invention includes a control unit 73, the control unit 73 controls the heater or the cathode fan and the anode fan by using a signal output from the temperature sensor, and the fuel cell 71 ) To maintain the proper operating temperature. For example, the control unit 73 maintains an operating temperature of 190 to 210°C for a phosphoric acid fuel cell (PAFC), and maintains an operating temperature of 550 to 650°C for a molten carbonate fuel cell (MCFC), and a solid For the oxide fuel cell (SOFC), the operating temperature is maintained at 650 to 1000°C, and for the polymer electrolyte fuel cell (PEMFC), the operating temperature is maintained at 30 to 80°C.

Hereinafter, the operation of the fuel cell 71 provided in the fuel cell system 7 according to the present invention will be described with reference to FIGS. 4A and 4B. 4A is a conceptual configuration diagram of a solid oxide fuel cell (SOFC), and FIG. 4B is a conceptual configuration diagram of a polymer electrolyte fuel cell (PEMFC).

First, referring to FIG. 4A, the solid oxide fuel cell (SOFC) 711 is an anode 711b through which the oxygen ion generated by the reduction reaction of oxygen in the cathode 711a passes through the electrolyte 711c. Go to. A fuel including hydrogen (H ₂ ) is introduced from the anode 711b, and oxygen ions (O ^2- ) and hydrogen (H ₂ ) moved to the anode (711b) through the electrolyte 711c. reacts electrochemically with water (H ₂ 0) and the electron (e ^-) is generated. Since electrons are consumed in the cathode 711a, electricity flows when the cathode 711a and the anode 711b are connected to each other.

The solid oxide fuel cell (SOFC) 711 is an electrochemical unreacted material such as carbon monoxide (CO), carbon dioxide (CO ₂ ) and unreacted hydrogen (H ₂ ), which may be included in the fuel supplied to the anode 711b. ) And the reaction product water (H ₂ 0 in liquid or gaseous state) is discharged. In addition, unreacted oxygen and nitrogen are discharged from the cathode 711a of the solid oxide fuel cell (SOFC) 611.

Referring to FIG. 4B, the polymer electrolyte fuel cell (PEMFC) 712 generates hydrogen (H ₂ ) as hydrogen ions (H ⁺ ) and electrons (e ⁻ ) in the catalyst layer 712b formed at the anode 712a. do. Hydrogen ions (H ⁺ ) move to a cathode 712d through a polymer electrolyte membrane 712c. The polymer electrolyte fuel cell (PEMFC) 712 reacts with hydrogen ions (H ⁺ ) and oxygen (O ₂ ) in the catalyst layer 712e formed in the cathode 712d to produce water (H ₂ 0). When the catalyst layer 712b formed on the anode 712a and the catalyst layer 712e formed on the cathode 712d are connected to each other, electricity flows.

The polymer electrolyte fuel cell (PEMFC) 712 discharges residual substances such as unreacted hydrogen (H ₂ ) from the catalyst layer 712b of the anode 712a. In addition, the polymer electrolyte fuel cell (PEMFC) 712 discharges unreacted oxygen and water (H ₂ 0) from the cathode 712d.

Other molten carbonate fuel cell (MCFC) is a fuel electrode (anode) of hydrogen (H ₂₎ and carbonate ions (CO ₃ ^2-) in the reaction water (H ₂ O) and carbon dioxide (CO _2), electron (e ^-) in the Is created. The produced carbon dioxide (CO ₂ ) is sent to the cathode, and carbon dioxide (CO ₂ ) and oxygen (O ₂ ) react at the cathode to produce carbonate ions (C0 ₃ ^-2 ). Carbonate ions (C0 ₃ ^-2 ) move to the anode through the electrolyte. In the molten carbonate fuel cell (MCFC), carbon dioxide (CO ₂ ) generated in the process of generating electricity may be circulated inside the fuel cell without being discharged to the outside.

2 to 5, the hydrogen generating unit 72 uses a raw material to generate a fuel required for the anode 711b of the fuel cell 71, that is, a device for generating hydrogen (H ₂ ) gas. Includes. In this specification, what is introduced into the hydrogen generator 72 is defined as raw material and raw water, and what is generated by the hydrogen generator 72 and introduced into the fuel cell 71 as fuel.

The hydrogen generating unit 72 may be variously designed in accordance with the type of the fuel cell 71 or for improving electricity generation efficiency. For example, when the fuel cell 71 is a phosphoric acid fuel cell (PAFC) or a solid oxide fuel cell (SOFC), the hydrogen generator 72 may be implemented by including a reformer and a combustor. . As another example, in the case where the fuel cell 71 is a molten carbonate fuel cell (MCFC) or a polymer electrolyte fuel cell (PEMFC), the hydrogen generating unit 72 is a water gas shift reactor in addition to a reformer and a combustor. , WGS).

The water gasification reactor (WGS) is a high temperature water gasification reactor (HTS, High-Temperature Shift Reactor), a medium temperature water gasification reactor (MTS, Mid-Temperature Shift Reactor), a low temperature water gasification reactor (LTS, Low-Temperature Shift Reactor), Or a carbon monoxide remover. The carbon monoxide eliminator may include a selective oxidation reactor (PROX) that burns and removes only carbon monoxide (CO) or a methanation reactor that reacts carbon monoxide (CO) with hydrogen (H ₂ ) to reduce its concentration. .

Referring to FIG. 5, in the fuel cell system 7 according to the present invention, an example of the hydrogen generating unit 72 will be described as follows.

The hydrogen generator 72 may include a reformer (721) and a combustor (722).

The reformer 721 includes hydrogen (H ₂ ) by undergoing a reforming reaction of fuel supplied from the branching section 6 and steam (H ₂ 0) supplied from the economizer 4. Regenerate gas is generated. In performing the reforming reaction, the reformer 721 may use thermal energy provided by the combustor 722. Hereinafter, in this specification, reforming gas coming out of the reformer 721 is defined as fuel.

The reformer 721 is implemented to include a reforming catalyst layer that triggers a reforming reaction. The reforming catalyst layer has a structure in which the reforming catalyst is filled with a catalyst supported on a carrier. The reforming catalyst is made of nickel (Ni), ruthenium (Ru), platinum (Pt), and the like, and the shape of the carrier supporting the catalyst may be, for example, granular, pellet shape, honeycomb shape, etc., and the material constituting the carrier May be a ceramic, heat-resistant metal, for example, alumina (Al ₂ O ₃ ) or titania (TiO ₂ ).

In the fuel cell system 7 according to the present invention, the reformer 721 may be installed outside the fuel cell 71. In this case, the fuel cell 71 is implemented with an external reforming type. In the fuel cell system 7 according to the present invention, the reformer 721 may be installed in the form of a reforming catalyst layer inside the fuel cell 71. In this case, the fuel cell 71 is implemented in an internal reforming type.

The combustor 722 provides heat so that the reforming reaction proceeds smoothly in the reformer 721. When the heating temperature of the reformer by the combustor 722 is low, the reforming reaction due to the endothermic reaction of the reformer 721 does not proceed well, and moisture (water droplets) is generated in the reformer 721. . When the heating temperature of the combustor 722 is high, catalytic activity of the reforming catalyst layer of the reformer 721 may be lowered.

The combustor 722 is a raw material supplied from the fuel storage tank 20 and exhaust gas discharged from an anode 711b of the fuel cell stack of the fuel cell 71 to improve the efficiency of the entire system. , Or a mixture of the two can be used as fuel. The combustor 722 may use air supplied from the air supply unit 30. In the fuel cell system 7 according to the present invention, the combustor 722 may additionally use air discharged from a cathode 711a of the fuel cell stack of the fuel cell 71.

Although not shown, the hydrogen generator 72 may further include one or more temperature sensors, and the temperature sensors detect the temperature of the reformer 721. The temperature of the reformer (721) is the optimum temperature by conditions such as the composition of the reformer (Reformer) 721 and the mixing ratio of fuel and steam (H ₂ O) supplied from the branch 6 The range changes. When the fuel cell system 7 according to an embodiment of the present invention includes the control unit 73 (shown in FIG. 3), the control unit 73 uses the signal output from the temperature sensor to generate the combustion unit 722 ) Increases or decreases the amount of raw material combustion to control the temperature of the reformer (721). For example, the control unit 73 may be implemented to control within a range of about ±20°C for an optimal temperature range.

Here, the gas generated through the reforming reaction in the reformer 721 includes not only hydrogen (H ₂ ), but also carbon monoxide (CO), carbon dioxide (CO ₂ ), and the like. When the fuel cell 71 is a polymer electrolyte fuel cell (PEMFC), carbon monoxide (CO) shortens the life of the fuel cell 71 by poisoning the electrode catalyst of the fuel cell stack of the polymer electrolyte fuel cell (PEMFC). Accordingly, in order to reduce the concentration of carbon monoxide (CO) to 10 to 20 ppm or less, the hydrogen generating unit 72 may further include an aqueous gasification reactor (WGS) 723.

The water gasification reactor (WGS) 723 reacts carbon monoxide (CO) with steam (H ₂ 0) to produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ). The water gasification reactor (WGS) 723 may be implemented by including a high temperature water gasification reactor (HTS) and a low temperature water gasification reactor (LTS) as shown in FIG. 5.

The optimum temperature of the high-temperature water gasification reactor (HTS) and the low-temperature water gasification reactor (LTS) varies depending on the type of catalyst used, and the composition of the gas discharged by the balance of the control temperature is determined. Although not illustrated in FIG. 5, a cooler and a temperature sensor may be installed in the high-temperature water gasification reactor (HTS) and the low-temperature water gasification reactor (LTS). When the fuel cell system 7 according to the present invention includes a control unit 73 (shown in FIG. 3), the control unit 73 controls the cooler using a signal output from a temperature sensor to control the high temperature water gasification reactor. (HTS) and the temperature of the low-temperature water gasification reactor (LTS) are controlled. For example, the high temperature water gasification reactor (HTS) is controlled within a range of 300 to 430°C, and the low temperature water gasification reactor (LTS) is controlled within a range of 200 to 250°C.

Although not shown, the water gasification reactor (WGS) 723 may include a carbon monoxide remover. The carbon monoxide remover removes the smallest amount of carbon monoxide (CO) remaining untreated in the low temperature water gasification reactor (LTS) after the low temperature water gasification reactor (LTS). The carbon monoxide eliminator is a selective oxidation reactor (Preferential Oxidation, PROX) that removes by burning only carbon monoxide (CO) among gases discharged from a low-temperature water gasification reactor (LTS) by receiving air from an air supply unit, or hydrogen (CO) H ₂ ) It may include a methanation reactor to reduce its concentration by reacting.

The selective oxidation reactor (PROX) is equipped with a cooler and a temperature sensor. When the fuel cell system 7 according to an embodiment of the present invention includes the control unit 73 (shown in FIG. 3), the control unit 73 controls the cooler by using a signal output from the temperature sensor. The temperature of the selective oxidation reactor (PROX) is controlled. For example, the selective oxidation reactor (PROX) is controlled within a range of 120 to 160°C. However, the optimum temperature of the selective oxidation reactor (PROX) is set differently depending on conditions such as the type of catalyst used and the method of use.

The catalyst layer of the selective oxidation reactor (PROX) has a structure in which a carrier carrying a selective oxidation catalyst is filled. The selective oxidation catalyst is made of platinum (Pt) or the like, and the shape of the carrier supporting the catalyst may be, for example, a granular shape, a pellet shape, or a honeycomb shape, and the material constituting the carrier is, for example, alumina (Al ₂ O ₃ ). , Magnesium oxide (MgO) and the like.

Hereinafter, a ship 1 according to the present invention will be described in detail with reference to the accompanying drawings. Since the fuel cell system 7 according to the present invention is included in the ship 1 according to the present invention, it will be described together while explaining the ship 1 according to the present invention.

6 is a conceptual block diagram of a ship according to the present invention, FIG. 7 is a schematic block diagram for explaining a fuel cell system in a ship according to the present invention, and FIG. 8 is a part of a plurality of auxiliary engines in a ship according to the present invention Schematic block diagram for explaining the case of operation, Figure 9 is a schematic block diagram for explaining the power storage unit in the ship according to the present invention. Here, the same configuration as in FIGS. 1 to 5 uses the same reference numerals.

6 to 8, the ship 1 according to the present invention includes an engine exhaust system 100, a fuel storage tank 20, a water supply unit 2, an electric heater 5, a branch unit 6, and It comprises a fuel cell system (7) according to the present invention. The ship 1 according to the present invention may further include an air supply unit 30, a power conversion unit 40, and a demand destination 50. The engine exhaust system 100 may include a main engine 101, a main economizer 102, a steam turbine 103, an auxiliary engine 3 and an economizer 4. The fuel cell system 7 may include a fuel cell 71, a hydrogen generator 72, and a controller 73. Here, the hydrogen generator 72 may include a reformer 721 and a combustor 722. The fuel cell 71 may include an anode 711b that receives fuel and a cathode 711a that receives air.

In the ship 1 according to the present invention, the engine exhaust system 100, the air supply unit 30, the power conversion unit 40, the demand destination 50, the fuel storage tank 20, the water The detailed description of the supply unit 2, the electric heater 5, the branch unit 6, and the fuel cell system 7 according to the present invention is as described above, so that the configuration and effect according to the embodiment will be described below. I will explain.

In the fuel cell system 7 according to the present invention, the reformer 721 may be connected to the branch 6 through a pipeline. Accordingly, the reformer 721 may be supplied with fuel branched by the branch 6. In this case, the reformer 721 may be supplied with some of the fuel supplied from the fuel storage tank 20 to the auxiliary engine 3. The reformer 721 may be connected to the economizer 4 through a pipeline. The reformer 721 reforms the fuel supplied from the branch 6 and the steam H ₂ 0 supplied from the economizer 4 to supply hydrogen for supply to the anode 711b. It can produce fuel. The reformer 721 may vary in the amount of fuel supplied to the anode 711b according to the amount of steam (H ₂ 0) supplied from the economizer 4. For example, if the amount of steam (H ₂ 0) supplied from the economizer 4 is large, the amount of hydrogen is increased, so the amount of fuel supplied to the anode 711b may be increased. When the demand source 50 does not use steam (H ₂ 0), the reformer 721 can receive all the steam (H ₂ 0) from the economizer 4, so the anode (711b) ) To increase the amount of fuel supplied. Accordingly, the fuel cell system 7 according to the present invention can increase the amount of electricity produced. Although not shown, a steam storage unit for storing steam H ₂ 0 may be installed between the economizer 4 and the customer 50. Accordingly, the consumer 50 may be a steam steam (H ₂ 0) stored in the steam storage portion, if necessary, the (H ₂ 0). When the engine 101 is a gas engine, the anode 711b may be directly supplied with fuel from the branch 6 without going through the reformer 721.

Therefore, the fuel cell system 7 according to the present invention can achieve the following operational effects.

First, the fuel cell system 7 according to the present invention can supply fuel and steam (H ₂ 0) from the fuel storage tank 20 and the economizer 4 installed in the hull 11, respectively, and supplies fuel. The fuel supply device for receiving and the steam generating device for receiving steam (H ₂ 0) can be omitted, so that the construction cost for producing electricity can be reduced, and space utilization can be increased.

Second, since the fuel cell system 7 according to the present invention is supplied with steam (H ₂ O) from the economizer 4 and can be supplied with fuel from the fuel storage tank 20, the auxiliary engine 3 Separately, the fuel cell 71 may additionally produce electricity, thereby increasing the amount of electricity produced.

Third, the fuel cell system 7 according to the present invention can be supplied with steam (H ₂ 0) through the electric heater 5 even if the auxiliary engine 3 and the economizer 4 are damaged or damaged. Accordingly, the fuel cell system 7 according to the present invention can continue to produce electricity even if at least one of the auxiliary engine 3 and the economizer 4 is damaged or damaged, thereby preventing electricity production from being interrupted. have.

In the fuel cell system 7 according to the present invention, the fuel cell 71 may be connected to the electric heater 5 through a wire. Accordingly, the fuel cell 71 can supply the produced electricity to the electric heater 5. The electric heater 5 may be connected to a plurality of auxiliary engines 3 through wires, respectively. Accordingly, the electric heater 5 heats the water supplied from the water supply unit 2 using electricity produced by at least one of the plurality of auxiliary engines 3 and the fuel cell 71 to steam ( H ₂ 0). Therefore, since the fuel cell system 7 according to the present invention can continuously supply electricity to the electric heater 5 even if the auxiliary engine 3 is damaged or damaged, the production of steam (H ₂ 0) is stopped. Can be prevented. When the ship 1 according to the present invention operates only a part of the plurality of auxiliary engines (3). That is, even when moored at a port, steam (H ₂ 0) can be additionally produced using the electric heater (5), thereby increasing the amount of steam (H ₂ 0) to increase the amount of steam (H ₂ 0), thereby increasing the amount of steam required by the customer (50). Can be satisfied.

In the fuel cell system 7 according to the present invention, the fuel cell 71 may be installed to be connected to a plurality of economizers 4 through a pipeline. Accordingly, the fuel cell 71 may supply fuel cell exhaust gas to at least one of the plurality of economizers 4. For example, as illustrated in FIG. 8, when only the first auxiliary engine 31 among the plurality of auxiliary engines 3 is operated, the fuel cell 71 may include the first economizer in the first auxiliary engine 31 ( 41) can supply fuel cell exhaust gas to the auxiliary engine exhaust gas. Accordingly, the fuel cell exhaust gas discharged from the fuel cell 71 may be joined to the auxiliary engine exhaust gas supplied from the first auxiliary engine 31 to the first economizer 41. The fuel cell exhaust gas may be discharged from at least one of the cathode 711a and the anode 711b. Therefore, the fuel cell system 7 according to the present invention increases the flow rate of the exhaust gas supplied to the economizer 4, so that the economizer 4 receives a larger amount of steam than before the fuel cell exhaust gas is supplied. by to produce H ₂ 0), the required amount of steam (H ₂ 0) to the consumer (50) the request can be further satisfied.

9, the ship 1 according to the present invention may further include a power storage unit (8).

The power storage unit 8 is for storing electricity. The power storage unit 8 may be installed such that one side is connected to a plurality of auxiliary engines 3 and a fuel cell 71 through wires, respectively. The power storage unit 8 may be an energy storage system capable of storing electricity. Accordingly, the power storage unit 8 may receive and store electricity produced by at least one of the plurality of auxiliary engines 3 and the fuel cell 71. Although not shown, the power storage unit 8 is installed to be connected to the main generator, so that when the main engine 101 is operated, electricity generated by the main generator may be stored. The power storage unit 8 may be a large-capacity electric storage device, but is not limited thereto, and if electricity can be stored, a plurality of low-capacity electric storage devices may be connected. In this case, the low-capacity electric storage device may be connected in series or parallel. The other side of the power storage unit 8 may be connected to the electric heater 5 through a wire. Accordingly, when the electric heater 5 is operated, the power storage unit 8 may supply electricity to the electric heater 5. The electric heater 5 may be operated when the amount of steam (H ₂ O) required by the demand source 50 exceeds a predetermined reference steam demand. In this case, the electric heater 5 may generate steam (H ₂ O) using electricity stored in the power storage unit 8. The reference steam demand amount means the amount of steam (H ₂ O) used by the demand source 50 on average, and may be preset by an operator. The electric heater 5 may or may not be operated according to a preset reference steam demand.

For example, the electric heater 5 may be operated when the amount of steam (H ₂ O) required by the demand source 50 exceeds a predetermined reference steam demand. In this case, the electric heater 5 may be operated using electricity stored in the power storage unit 8. Accordingly, the electric heater 5 may heat the water supplied from the water supply unit 2 so that the water supplied from the water supply unit 2 to the economizer 4 is preheated.

For example, the electric heater 5 may not be operated if the amount of steam (H ₂ O) required by the demand source 50 is less than or equal to a predetermined reference steam demand. In this case, it is because the amount of steam (H ₂ O) required by the consumer 50 can be satisfied by the amount of steam (H ₂ O) produced by the economizer 4.

Therefore, the fuel cell system 7 according to the present invention can achieve the following operational effects.

First, since the fuel cell system 7 according to the present invention additionally produces steam (H ₂ O) using electricity stored in the power storage unit 8 only when the electric heater 5 is operated, the power In addition to preventing waste of electricity stored in the storage unit 8, it is possible to increase the service life of the electric heater 5.

Second, the fuel cell system 7 according to the present invention receives and stores electricity from the main generator when the power storage unit 8 is sailing, and when anchored, the first generator, the second generator, And since it is possible to receive and store electricity produced from at least one of the fuel cells 71, it is possible to prevent electricity shortage for operating the electric heater 5 from running out.

Third, in the fuel cell system 7 according to the present invention, since the electric power storage unit 8 always stores electricity in case the electric heater 5 is operated, the first auxiliary engine 31, Even if at least one of the second auxiliary engine 32 and the fuel cell 71 is damaged or damaged and cannot be operated, the electric heater 5 uses steam stored in the power storage unit 8 to steam. (H ₂ O) can be supplied. Accordingly, the fuel cell system 7 according to the present invention uses the electricity stored in the power storage unit 8 when the amount of steam (H ₂ O) required by the demand source 50 is large, using the electric heater ( 5) By activating quickly, steam (H ₂ O) can be rapidly supplied by the amount of steam (H ₂ O) required by the customer (50).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible without departing from the spirit of the present invention. It will be clear to those who have the knowledge of

1: Ship
2: Water supply unit 3: Auxiliary engine
4: economizer 5: electric heater
6: branch part 7: fuel cell system
8: Power storage unit 31: 1st auxiliary engine
31: 2nd auxiliary engine 41: 1st economizer
42: second economizer 71: fuel cell
72: hydrogen generating unit 73: control unit

Claims (6)

A water supply unit installed on the hull and supplying water;
A plurality of auxiliary engines spaced apart from the water supply unit and for generating electricity;
A plurality of economizers for generating steam (H ₂ O) required by a customer by heating the water supplied from the water supply unit by using the auxiliary engine exhaust gas discharged from the auxiliary engines as a heat source;
An electric heater installed to be connected to the economizers and generating steam (H ₂ O) by heating water supplied from the water supply unit using electricity;
A branching unit for branching fuel supplied from the fuel storage tank for storing fuel to the auxiliary engine;
A fuel cell system for producing electricity using fuel supplied from the branch and steam supplied from the economizer; And
And a power storage unit for storing electricity produced by at least one of the plurality of auxiliary engines and the fuel cell,
The fuel cell system,
A hydrogen generator including a reformer and a combustor for reforming the fuel supplied from the branch and the steam supplied from the economizer; And
It includes a fuel cell for producing electricity, including an anode, an anode, and an electrolyte formed between the anode and the cathode,
The electric heater generates electricity by receiving electricity from at least one of the plurality of auxiliary engines, the fuel cell, and the power storage unit, and supplies steam to at least one of the plurality of economizers,
The fuel cell exhaust gas discharged from the fuel cell is joined to the auxiliary engine exhaust gas supplied from the auxiliary engine to the economizer so that the amount of exhaust gas supplied to at least one of the plurality of economizers increases and is supplied to the economizer. Ship characterized by. delete According to claim 1,
The electric heater is installed to be connected to the electric power storage unit, but when the amount of steam (H ₂ O) required by the customer exceeds a predetermined reference steam demand, steam (H) is used by using electricity stored in the electric power storage unit. ₂ O) ship characterized in that it generates. For supplying water as a heat source to the fuel supplied from a branch that branches the fuel supplied to a plurality of auxiliary engines for producing electricity in a fuel storage tank for storing fuel and auxiliary engine exhaust gas discharged from the auxiliary engines A hydrogen generator including a reformer and a combustor for reforming the steam supplied from a plurality of economizers to generate steam (H ₂ O) required by a customer by heating the water supplied from the water supply unit;
A fuel cell for producing electricity, including an anode, an anode, and an electrolyte formed between the anode and the cathode; And
And a power storage unit for storing electricity produced by at least one of the plurality of auxiliary engines and the fuel cell,
It is installed to be connected to the economizers, and heats water supplied from the water supply unit using electricity supplied from at least one of the plurality of auxiliary engines, the fuel cell, and the power storage unit to generate steam (H ₂ O). Steam (H ₂ O) generated in the electric heater for generating is supplied to at least one of the plurality of economizers,
The fuel cell exhaust gas discharged from the fuel cell is joined to the auxiliary engine exhaust gas supplied from the auxiliary engine to the economizer so that the amount of exhaust gas supplied to at least one of the plurality of economizers increases and is supplied to the economizer. Fuel cell system characterized by. delete The method of claim 4,
The electric heater is installed to be connected to the electric power storage unit, but when the amount of steam (H ₂ O) required by the customer exceeds a predetermined reference steam demand, steam (H) is used by using electricity stored in the electric power storage unit. ₂ O) fuel cell system characterized in that it generates.

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