KR102190941B1 - Ship - Google Patents

Abstract

The present invention is a diesel engine exhaust system having an evaporator generating steam (H ₂ O) by evaporating water with waste heat of exhaust gas discharged from a diesel engine, a fuel cell system interlocking with the diesel engine exhaust system, and the fuel cell. It relates to a ship including a power conversion unit for converting the DC current (DC) output from the system to the AC current (AC).

Description

Ship{SHIP}

The present invention relates to an environmentally friendly vessel.

In general, most of the total energy comes from fossil fuels. However, the reserves of fossil fuels are limited, and the use of fossil fuels has serious effects on the environment, such as air pollution, acid rain, and global warming. In order to solve the problems associated with the use of fossil fuels, an environment-friendly power generation system is being developed.

Environmentally friendly power generation systems include power generation systems that generate electricity by converting renewable energy including sunlight, water, geothermal heat, precipitation, and biological organisms. In addition, environmentally friendly power generation systems include fuel cell systems that convert fossil fuels or generate electricity through chemical reactions such as hydrogen and oxygen.

Depending on the type of electrolyte used, fuel cells include alkaline fuel cells (AFCs), phosphoric acid fuel cells (PAFCs), molten carbonate fuel cells (MCFCs), solid oxides. It is classified into fuel cells (SOFC, Solid Oxide Fuel Cell), Polymer Electrolyte Membrane Fuel Cell (PEMFC), and Direct Methanol Fuel Cell (DMFC). Each of these fuel cells operates based on fundamentally the same principle, but differs in operating temperature, electrolyte, power generation efficiency, and power generation performance.

On the other hand, in trains, ships, industrial vehicles, etc., power generation systems that generate necessary power using a diesel engine are commonly used. However, the power generation system using a diesel engine not only has a low thermal efficiency of 30 to 40%, but also generates environmental pollutants such as carbon dioxide (CO ₂ ), sulfur oxides (SO _X ), and nitrogen oxides (NO _X ) when generating electricity. There is a problem. In recent years, the industry is researching a new method that can cope with global environmental pollution regulations while generating required power by using a combination of a power generation system using a diesel engine and a fuel cell system, which is an environmentally friendly power generation system.

However, when a power generation system using a diesel engine and a fuel cell system are applied to one structure, the following problems arise.

First, when a power generation system using a diesel engine and a fuel cell system are installed in one structure, there is a problem in that the construction cost of the structure facility increases.

Second, as the number of fuel cells increases or the required power generation output increases, the amount of unreacted residual substances and reaction products such as water discharged from the fuel cell increases, although less than that of the conventional hydrocarbon power generation technology. Therefore, the fuel cell system according to the prior art has a problem of intensifying environmental pollution rather than renewable energy such as sunlight due to an increase in residual substances and reaction products.

The present invention has been conceived to solve the above-described problems, and is to provide a ship capable of reducing facility construction cost and operation cost.

The present invention is to provide a ship capable of reducing unreacted residual substances and reaction products generated in a fuel cell.

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

The ship according to the present invention includes a diesel engine exhaust system having an evaporator generating steam (H ₂ O) by evaporating water with waste heat of exhaust gas discharged from the diesel engine; A fuel cell system interlocking with the diesel engine exhaust system; And a power conversion unit for converting a direct current (DC) output from the fuel cell system into an alternating current (AC), wherein the fuel cell system includes a gas supplied from an LNG evaporator that evaporates LNG and the diesel engine exhaust system. A reformer that generates reformed gas by reforming the steam supplied from the evaporator (H ₂ O), a combustor that heats the reformer, a fuel cell that generates electricity by receiving the reformed gas, and steam from the evaporator of the diesel engine exhaust system (H ₂ O) is supplied to separate steam (H2O) and liquid water, and steam (H2O) is supplied to the reformer, and heat is generated with high temperature water supplied from the steam separator. It may include a first vaporizer for supplying the supplied water to the evaporator of the diesel engine exhaust system.

In the ship according to the present invention, the diesel engine exhaust system includes a heater for heating air by using waste heat of exhaust gas discharged from the diesel engine as a heat source, and the heater uses the heated air as a cathode of the fuel cell. ) Can be supplied.

In the ship according to the present invention, the diesel engine exhaust system includes a heater for heating air using waste heat of exhaust gas discharged from the diesel engine as a heat source, and the fuel cell system is supplied from a heater of the diesel engine exhaust system. It may include a first heat exchanger for heat exchanging the heated air and the steam (H2O) supplied from the water separator to the reformer.

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

The present invention is implemented to use the waste heat of diesel engine exhaust gas discharged to the outside through the diesel engine exhaust system 800 as a heat source for vaporizing LNG (Liquefied Natural Gas). ), it is possible to omit the heating device installed to heat it, so it is possible to reduce the fuel or electricity supplied to the separate heating device. Accordingly, even if a power generation system using a diesel engine and a fuel cell system are installed in one structure, it can contribute to reducing the facility construction cost and operation cost.

The present invention is implemented so that the combustor receives unreacted residual materials and reaction products from an anode of a fuel cell or an anode of a fuel cell and uses them for a combustion reaction. It can contribute to reducing environmental pollution due to increased air emissions.

The present invention produces water by condensing unreacted residual substances and reaction products discharged from an anode and an anode of a fuel cell in a combustor to produce water, and supplies the produced water to a separator for exhaust. Since it is implemented to produce steam by heating with waste heat of diesel engine exhaust gas discharged to the outside through a gas economizer, it is possible to reduce the amount of heating heat source and external supply of raw material water for the raw material water for generating and supplying the steam required by the reformer. , It is possible to increase the efficiency of the power generation system.

1 is a conceptual configuration diagram of an entire system according to the present invention
2 is a conceptual configuration diagram of a fuel cell system according to a first embodiment of the present invention
3A and 3B are exemplary views for explaining the operation of a fuel cell used in the present invention, and FIG. 3A is a conceptual configuration diagram of a solid oxide fuel cell (SOFC)
3B is a conceptual diagram of a polymer electrolyte fuel cell (PEMFC)
4 is an exemplary view for explaining a hydrogen generating unit according to an embodiment of the present invention
5 is a conceptual configuration diagram of a fuel cell system according to a second embodiment of the present invention
6 is a conceptual configuration diagram of a fuel cell system according to a third embodiment of the present invention
7 is a configuration diagram according to an embodiment of the fuel cell system of FIG. 5
8 is a schematic diagram showing an example of a ship according to the present invention

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

Referring to FIG. 1, the fuel cell system 200 according to the present invention is applied to the power generation system 100 to generate electricity. Prior to describing the fuel cell system 200 according to the present invention, a first look at the power generation system 100 is as follows.

The power generation system 100 includes a raw material supply unit 110, a raw material water supply unit 120, an air supply unit 130, a power conversion unit 140, and a fuel cell system 200 according to the present invention.

The raw material supply unit 110 includes a raw material storage tank and supplies raw materials stored in the raw material storage tank. For example, raw materials are hydrocarbon-based materials, such as LNG (liquefied natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), gasoline, dimethyl ether, methane gas, It may be hydrogen-purified off-gas, pure hydrogen, or the like.

For example, when the power generation system 100 is applied to a vehicle, the raw material supply unit 110 includes a raw material storage tank and a device (eg, a pump) for supplying raw materials stored in the raw material storage tank. As another example, when the power generation system 100 is applied to an LNG carrier, the raw material supply unit 110 supplies LNG (liquefied natural gas) from an LNG storage tank. As another example, when the power generation system 100 is applied to a diesel engine ship, the raw material supply unit 110 includes a diesel fuel storage tank and a device for supplying diesel fuel from the diesel fuel storage tank.

The raw material water supply unit 120 may include a raw material water storage tank and a device (eg, a pump) for supplying raw material water stored in the raw material water storage tank. The raw material water may be, for example, fresh water, fresh water, or sea water. As another example, the raw material water may be water that has been treated to remove impurities or remove ions from fresh water or sea water. As another example, the raw material water may be fresh water or water in which impurities have been removed from seawater.

The air supply unit 130 supplies air to the fuel cell system 200 according to the present invention. In general, air refers to a gas including nitrogen, oxygen, carbon dioxide, and the like, but in the present specification, a gas from which nitrogen or carbon dioxide is removed, or a case in which all gases other than oxygen are removed is also included. The air supply unit 130 may include an air storage tank and a device (eg, a blower) supplying air from the air storage tank. As another example, the air supply unit 130 may be implemented to receive external air, compress it, and then supply compressed high-pressure air or supply it at normal pressure.

The power conversion unit 140 converts the direct current (DC) from the fuel cell system 200 according to the present invention into an alternating current (AC). The power conversion unit 140 includes a DC-DC converter for boosting or reducing the output voltage from the fuel cell system 200 according to the present invention and a DC-AC for converting a DC current (DC) into an AC current (AC). It may be composed of an inverter or the like. The power conversion unit 140 discharges electricity supplied from the fuel cell system 200 according to the present invention as a power load. For example, in the case of a ship, the power load may be an electrical equipment in a ship such as basic electrical equipment of a ship and electric equipment of a cargo system. Although not shown, the power conversion unit 140 may be implemented to transmit and store electricity to an energy storage device, for example, a battery.

The fuel cell system 200 according to the present invention uses fuel, water (H ₂ O), and air to generate electricity. The fuel cell system 200 according to the present invention may be used in small structures such as homes or automobiles, and may be used in large structures such as ships. The fuel cell system 200 according to the present invention may be implemented to interlock with a diesel engine, a gas engine, a steam turbine, a gas turbine, or a Rankine Cycle using combustion energy of fuel.

Hereinafter, a fuel cell system 100 according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, the fuel cell system 200 according to the first embodiment of the present invention includes a fuel cell 210 and a hydrogen generator 400. The fuel cell system 200 according to the present invention may be implemented by including a control unit 250 that controls the operation of all components including the fuel cell 210 and the hydrogen generator 400. In this specification, what flows into the hydrogen generation unit 400 is defined as a raw material and raw material water, and what is generated in the hydrogen generation unit 400 and flows into the fuel cell 210 is defined as a fuel.

The fuel cell 210 is implemented including a fuel cell stack. In the fuel cell stack, an electrolyte layer is formed between a cathode and an anode, and a separator for supplying hydrogen, supplying air, and recovering heat is provided at the anode and cathode. It is composed of the installed unit cell modules connected in series as much as the required quantity.

The fuel cell 210 may include a temperature sensor and a temperature maintaining device, that is, a heater or a cathode fan, an anode fan, and a cooling plate. The temperature sensor senses the temperature of the fuel cell stack, the temperature of the cathode, and the temperature of the anode. 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 of the fuel cell stack. The anode fan dissipates heat generated by an anode of the fuel cell stack. The cathode fan and the anode fan may be implemented as a part of a heat exchanger used in a fuel cell stack.

When the fuel cell system 200 according to the present invention includes the control unit 250, the control unit 250 controls the heater or cathode fan and the anode fan using a signal output from a temperature sensor to control the fuel cell 210 ) To properly maintain the operating temperature. For example, the control unit 250 maintains the operating temperature at 190 to 210°C in the case of a phosphoric acid fuel cell (PAFC), and maintains the operation temperature at 550 to 650°C in the case of a molten carbonate fuel cell (MCFC), and In the case of an oxide fuel cell (SOFC), the operating temperature is maintained at 650-1000°C, and in the case of a polymer electrolyte fuel cell (PEMFC), the operating temperature is maintained at 30-80°C.

Hereinafter, the operation of the fuel cell 210 provided in the fuel cell system 200 according to the present invention will be described with reference to FIGS. 3A and 3B. 3A is a conceptual configuration diagram of a solid oxide fuel cell (SOFC), and FIG. 3B is a conceptual configuration diagram of a polymer electrolyte fuel cell (PEMFC).

First, referring to FIG. 3A, in a solid oxide fuel cell (SOFC) 310, oxygen ions generated by a reduction reaction of oxygen in a cathode 311 are transferred through an electrolyte 312 to an anode 313. Go to. Fuel containing hydrogen (H ₂ ) is introduced from the anode 313, and oxygen ions (O ^2- ) and hydrogen (H ₂ ) moved to the anode 313 through the electrolyte 312 Reacts electrochemically to generate water (H ₂ O) and electrons (e-). Since electrons are consumed in the cathode 311, electricity flows when the cathode 311 and the anode 313 are connected to each other.

The solid oxide fuel cell (SOFC) 310 includes electrochemical unreacted substances such as carbon monoxide (CO) and carbon dioxide (CO ₂ ), which may be included in the fuel supplied to the anode 313, and unreacted hydrogen (H _{2 ).} ) And the reaction product water (liquid or gaseous H ₂ O) are discharged. In addition, unreacted oxygen and nitrogen are discharged from the cathode 311 of the solid oxide fuel cell (SOFC) 310.

Referring to FIG. 3B, in a polymer electrolyte fuel cell (PEMFC) 320, hydrogen (H ₂ ) is generated as hydrogen ions (H ⁺ ) and electrons (e-) in the catalyst layer 322 formed on the anode 321. do. Hydrogen ions (H ⁺ ) move to the cathode 324 through the polymer membrane 323. The polymer electrolyte fuel cell (PEMFC) 320 produces steam (H ₂ O) by reacting hydrogen ions (H ⁺ ) and oxygen (O ₂ ) in the catalyst layer 325 formed on the cathode 324. When the catalyst layer 322 formed on the anode 321 and the catalyst layer 325 formed on the cathode 324 are connected to each other, electricity flows.

The polymer electrolyte fuel cell (PEMFC) 320 discharges residual substances such as unreacted hydrogen (H ₂ ) from the catalyst layer 322 of the anode 321. In addition, the polymer electrolyte fuel cell (PEMFC) 320 discharges unreacted oxygen and water (H ₂ O) from the cathode 324.

In addition, in the molten carbonate fuel cell (MCFC), hydrogen (H ₂ ) and carbonate ions (CO ₃ ^2- ) react at the anode, resulting in water (H ₂ O), carbon dioxide (CO ₂ ), and electrons (e-). Is created. The generated carbon dioxide (CO ₂ ) is sent to a cathode, and carbon dioxide (CO ₂ ) and oxygen (O ₂ ) react at the cathode to produce carbonate ions (CO ₃ ^2- ). Carbonate ions (CO 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 discharging to the outside.

Referring to FIGS. 2 and 4, the hydrogen generation unit 400 includes a device for generating fuel, that is, hydrogen (H ₂ ) gas required for an anode of the fuel cell 210 by using a raw material. In this specification, what flows into the hydrogen generation unit 400 is defined as a raw material and raw material water, and what is generated in the hydrogen generation unit 400 and flows into the fuel cell 210 is defined as a fuel.

The hydrogen generation unit 400 may be designed in various ways according to the type of fuel cell 210 or to improve electricity generation efficiency. For example, when the fuel cell 210 is a molten carbonate fuel cell (MCFC) or a solid oxide fuel cell (SOFC), the hydrogen generation unit 400 may be implemented by including a reformer and a combustor. . As another example, when the fuel cell 210 is a phosphoric acid type fuel cell (PAFC) or a polymer electrolyte fuel cell (PEMFC), the hydrogen generating unit 400 includes a reformer and a combustor, as well as a water gas shift reactor. , WGS) may be further included.

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 it may include a carbon monoxide remover. The carbon monoxide remover may include a selective oxidation reactor (Preferential Oxidation, PROX) for removing only carbon monoxide (CO) by burning, or a methanation reactor for reducing the concentration by reacting carbon monoxide (CO) with hydrogen (H ₂ ). .

In the fuel cell system 200 according to the present invention with reference to FIG. 4, an example of the hydrogen generation unit 400 will be described as follows.

The hydrogen generation unit 400 may include a raw material processing unit 410, a raw material water treatment unit 420, a reformer 430, and a combustor 440.

The raw material processing unit 410 pre-processes raw materials supplied from a raw material supply unit including a raw material storage tank. For example, the raw material processing unit 410 may include an LNG evaporator for evaporating liquefied natural gas supplied from an LNG storage tank and a vaporizer installed in the LNG evaporator. If the raw material is a liquid raw material having a relatively high molecular weight, such as marine gas oil (MGO), marine diesel oil (MDO), heavy fuel oil (HFO), etc., the raw material processing unit ( 410) is implemented by including a heater that applies heat to marine gas oil (MGO), marine diesel oil (MDO), or general heavy oil (HFO) and a methanizer that generates methane (CH4) by catalytic reaction of the heated raw material. Can be. In addition, the raw material processing unit 410 may include a filter for removing impurities contained in the raw material or a desulfurization device for removing sulfides.

The raw material water treatment unit 420 pre-treats raw material water supplied from a raw material water supply unit including a raw material water storage tank. The raw material water treatment unit 420 generates steam (H ₂ O) by heating the raw material water, for example, and supplies the steam (H ₂ O) to a reformer. The raw material water treatment unit 420 may include, for example, a heat exchanger that heats raw material water with waste heat of exhaust gas generated from the combustor 440. In addition, the raw material water treatment unit 420 may be implemented by including a steam separator for separating moisture (water droplets) contained in exhaust gas or steam of the fuel cell system. In addition, the raw material water treatment unit 420 may use activated carbon, a resin for removing ions, etc. to maintain the purity required by the fuel cell system, and may include a sensor and a control system for measuring the raw material water. As another example, the raw material water treatment unit 420 may include an external water supply line and system for maintaining a predetermined level of water.

The reformer 430 performs a reforming reaction of the pretreated raw material supplied from the raw material processing unit 410 and the steam (H ₂ O) supplied from the raw material water treatment unit 420 to generate hydrogen (H ₂ ). It generates a reformed gas containing. In performing such a reforming reaction, the reformer 330 may use heat energy provided from the combustor 440. Hereinafter, in the present specification, the reformed gas emitted from the reformer 330 is defined as fuel.

The reformer 430 is implemented by including 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, a granular shape, a pellet shape, and a honeycomb shape, and the material constituting the support May be ceramic, heat-resistant metal, or the like, such as alumina (Al ₂ O ₃ ) or titania (TiO ₂ ).

In the fuel cell system 200 according to an embodiment of the present invention, the reformer 330 may be installed outside the fuel cell 210. In this case, the fuel cell 210 is implemented in an external reforming type. In the fuel cell system 200 according to the present invention, the reformer 330 may be installed in the form of a reforming catalyst layer inside the fuel cell 210. In this case, the fuel cell 210 is implemented in an internal reforming type.

The combustor 440 provides heat so that the reforming reaction proceeds smoothly in the reformer 430. When the reformer heating temperature by the combustor 440 is low, the reforming reaction due to the endothermic reaction of the reformer 430 does not proceed well, and moisture (water droplets) is generated in the reformer 430 . When the heating temperature of the combustor 440 is high, the catalytic activity of the reforming catalyst layer of the reformer 430 may decrease.

In order to improve the overall efficiency of the system, the combustor 440 includes raw materials pretreated by the raw material processing unit 410, exhaust gas discharged from an anode of the fuel cell stack of the fuel cell 210, or both. A mixture of can be used as a raw material. The combustor 440 may use air supplied from the air supply unit 130 (shown in FIG. 1 ). In the fuel cell system 200 according to the present invention, the combustor 440 may additionally use air discharged from a cathode of the fuel cell stack of the fuel cell 210.

Although not shown, the hydrogen generating unit 400 may further include one or more temperature sensors, and the temperature sensor detects the temperature of the reformer 430. The temperature of the reformer 430 is the optimum temperature depending on the configuration of the reformer 430 and the mixing ratio of the raw material pretreated in the raw material processing unit 410 and steam (H ₂ O). The range changes. When the fuel cell system 200 according to the present invention includes the control unit 250 (shown in Fig. 2), the control unit 250 uses a signal output from a temperature sensor to determine the amount of raw material combustion in the combustor 440. By increasing or decreasing the temperature of the reformer 430 is controlled. For example, the controller 250 may be implemented to control within a range of about ±20°C with respect to the optimum temperature range.

Here, the gas generated through the reforming reaction in the reformer 430 includes not only hydrogen (H ₂ ) but also carbon monoxide (CO) and carbon dioxide (CO ₂ ). When the fuel cell 210 is a polymer electrolyte fuel cell (PEMFC), carbon monoxide (CO) poisons the electrode catalyst of the fuel cell stack of the polymer electrolyte fuel cell (PEMFC) to shorten the life of the fuel cell 210. Accordingly, in order to reduce the concentration of carbon monoxide (CO) to 10 to 20 ppm or less, the hydrogen generation unit 400 may further include a water gasification reactor (WGS) 450.

The water gasification reactor (WGS) 450 may react carbon monoxide (CO) and steam (H ₂ O) to produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ). The water gasification reactor (WGS) 450 may include a high temperature water gasification reactor (HTS) and a low temperature water gasification reactor (LTS) as shown in FIG. 4.

The optimum temperature of the high-temperature water gasification reactor (HTS) and the low-temperature water gasification reactor (LTS) depends on the type of catalyst used, and the composition of the discharged gas is determined by equilibrium of the control temperature. Although not shown in FIG. 4, 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, respectively. When the fuel cell system 200 according to the present invention includes a control unit 250 (shown in Fig. 2), the control unit 250 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 the range of 300 to 430 °C, and the low temperature water gasification reactor (LTS) is controlled within the range of 200 to 250 °C.

Although not shown, the water gasification reactor (WGS) 450 may include a carbon monoxide remover. The carbon monoxide remover removes a very small amount of carbon monoxide (CO) that has not been completely treated in the low-temperature water gasification reactor (LTS) after the low-temperature water gasification reactor (LTS). The carbon monoxide remover receives air from the air supply unit and burns and removes only carbon monoxide (CO) among gases supplied from the low-temperature water gasification reactor (LTS), or carbon monoxide (CO) is converted to hydrogen ( It may include a methanation reactor to reduce the concentration by reacting with H ₂ ).

The selective oxidation reactor (PROX) is equipped with a cooler and a temperature sensor. When the fuel cell system 200 according to the present invention includes a control unit 250 (shown in FIG. 2), the control unit 250 controls the cooler using a signal output from a temperature sensor, thereby controlling the selective oxidation reactor (PROX). ) To control the temperature. For example, the selective oxidation reactor (PROX) is controlled within the range of 120 ~ 160 ℃. 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 filled with a carrier supporting a selective oxidation catalyst. The selective oxidation catalyst is made of platinum (Pt), etc., and the shape of the support supporting the catalyst may be, for example, a granular shape, a pellet shape, and a honeycomb shape, and the material constituting the support is, for example, alumina (Al ₂ O ₃ ). , Magnesium oxide (MgO), etc.

Hereinafter, a fuel cell system 200 according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5 is a conceptual configuration diagram of a fuel cell system according to a second embodiment of the present invention. Here, the same configuration as in FIGS. 1 to 4 uses the same reference numerals.

Referring to FIG. 5, a fuel cell system 200 according to a second embodiment of the present invention includes a fuel cell 210, a raw material processing unit 410, a raw material water treatment unit 420, a reformer 430, and a combustor 440. ) Can be implemented. The fuel cell system 200 according to the second embodiment of the present invention is implemented to interlock with the diesel engine exhaust system 800 including the diesel engine.

The diesel engine exhaust system 800 is a component included in a power generation system using a diesel engine, and purifies exhaust gas including environmental pollutants such as nitrogen oxides (NO _X ) generated in the combustion chamber of the diesel engine and exhaust gas. It is a device that recovers heat from and discharges it to the outside. The diesel engine exhaust system 800 may be equipped with a selective catalytic reduction (SCR) reactor to reduce nitrogen oxides (NO _X ) contained in exhaust gas. The diesel engine exhaust system 800 may include an economizer including an evaporator for evaporating water and a heater for heating air using waste heat of high-temperature exhaust gas discharged from the diesel engine.

The diesel fuel supply unit 710 includes a diesel fuel storage tank, and supplies diesel fuel from the diesel fuel storage tank to the diesel engine of the diesel engine exhaust system 800. The diesel fuel may be marine gas oil (MGO), marine diesel oil (MDO), general heavy oil (HFO), methanol, dimethyl ether (DME), and liquefied petroleum gas (LPG).

The fuel cell 210 is generated from an anode into which fuel including hydrogen is introduced, a cathode through which air, which is an oxidizing agent required for a fuel cell reaction, is introduced, and the anode and the cathode. It produces electricity, including an electrolyte that acts as a transport for ions. The fuel cell 210 is an alkaline fuel cell (AFC), a phosphoric acid fuel cell (PAFC), a molten carbonate fuel cell (MCFC), a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEMFC), or a direct methanol fuel. It may be a fuel cell selected from among cells (DMFC).

The raw material processing unit 410 preprocesses the raw material supplied from the raw material supply unit 110 including a raw material storage tank. For example, the raw material processing unit 410 may include an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from an LNG storage tank and a vaporizer installed in the LNG evaporator. The fuel cell system 200 according to the second embodiment of the present invention may use waste heat of exhaust gas supplied from the combustor 440 as a heat source for vaporizing LNG (liquefied natural gas) in the LNG evaporator.

For example, in the fuel cell system 200 according to the second embodiment of the present invention, the waste heat of diesel engine exhaust gas discharged to the outside through the diesel engine exhaust system 800 is converted to LNG (liquefied natural gas) in the LNG evaporator. It can be used as a heat source to vaporize. As another example, the fuel cell system 200 according to the second embodiment of the present invention includes waste heat of diesel engine exhaust gas discharged to the outside through the diesel engine exhaust system 800 or exhaust gas supplied from the combustor 440. The waste heat of can be used as a heat source for vaporizing LNG (liquefied natural gas) in the LNG evaporator.

The raw material water treatment unit 420 pre-treats the raw material water supplied from the raw material water supply unit 120 including a raw material water storage tank. The raw material water may be, for example, fresh water, fresh water, or sea water. As another example, the raw material water may be water that has been treated to remove impurities or remove ions from fresh water or sea water. As another example, the raw material water may be fresh water or water in which impurities have been removed from seawater.

The raw material water treatment unit 420 generates steam (H ₂ O) by heating the raw material water, and supplies the steam (H ₂ O) to the reformer 430. In the diesel engine exhaust system 800, steam (H ₂ O) may be generated by evaporating water with waste heat of diesel engine exhaust gas discharged to the outside. The raw processor 420 when supplied with steam (H ₂ O) in the diesel engine exhaust system 800 may separate the water (water droplets) contained in the steam (H ₂ O) and the steam (H ₂ O) It may be implemented by including a steam separator supplied to the reformer 430.

The reformer 430 proceeds with a reforming reaction of the pretreated raw material supplied from the raw material processing unit 410 and the steam (H ₂ O) supplied from the raw material water treatment unit 420 to produce a reforming gas, that is, hydrogen (H ₂ ). Produces fuel containing. The fuel produced by the reformer 430 may include carbon monoxide (CO) in addition to hydrogen (H ₂ ). Although not shown, the hydrogen generation unit 400 may include the water gasification reactor 450 to reduce the CO concentration of the fuel supplied to the fuel cell 210.

The combustor 440 provides a heat source required for the reformer 430. The combustor 440 may be implemented to receive unreacted residual materials and reaction products from an anode of the fuel cell 210 or an anode of the fuel cell 210 and use for a combustion reaction.

The fuel cell system 200 according to the second embodiment of the present invention can achieve the following effects.

First, the fuel cell system 200 according to the second embodiment of the present invention uses the waste heat of the diesel engine exhaust gas discharged to the outside through the diesel engine exhaust system 800 as a heat source for vaporizing LNG (liquefied natural gas). By being implemented to be used, a heating device installed to heat LNG (Liquefied Natural Gas) in a conventional fuel cell system can be omitted, so that fuel or electricity supplied to a separate heating device can be reduced. Accordingly, even if a power generation system using a diesel engine and a fuel cell system are installed in one structure, it can contribute to reducing the facility construction cost and operation cost.

Second, in the fuel cell system 200 according to the second embodiment of the present invention, the combustor 440 is unreacted from an anode of the fuel cell 210 or an anode of the fuel cell 210. By being implemented to receive residual materials and reaction products to be used in the combustion reaction, it is possible to contribute to reducing environmental pollution due to an increase in air emission of unreacted residual materials and reaction products of the fuel cell 210.

Third, the fuel cell system 200 according to the second embodiment of the present invention condenses the exhaust gas burned in the combustor 440 to produce water, and supplies the produced water to the brackish water separator through the exhaust gas economizer. Since it is implemented to produce steam by heating with waste heat of diesel engine exhaust gas discharged to the outside, it is possible to reduce the external supply amount of the heating heat source and the raw material water for the raw material water for generating and supplying the steam required by the reformer. Can increase the efficiency of

6 is a conceptual configuration diagram of a fuel cell system according to a third embodiment of the present invention. Here, the same configurations as in FIGS. 1 to 5 use the same reference numerals.

6, a fuel cell system 200 according to a third embodiment of the present invention includes a fuel cell 210, a raw material processing unit 410, a raw material water treatment unit 420, a reformer 430, and a combustor 440. , And a water gasification reactor (WGS) 450 may be implemented. The fuel cell system 200 according to the third embodiment of the present invention is implemented to interlock with a diesel engine exhaust system 800 including a diesel engine.

In the fuel cell system 200 according to the third embodiment of the present invention, the water gasification reactor (WGS) 450 receives the reformed gas from the reformer 430. The aqueous gasification reactor (WGS) 450 is used to reduce the concentration of carbon monoxide (CO) contained in the reformed gas to 10 to 20 ppm or less.

The water gasification reactor (WGS) 450 may be implemented as, for example, a high temperature water gasification reactor (HTS). As another example, the water-based gasification reactor (WGS) 450 may include a high-temperature water-gasification reactor (HTS) and a low-temperature water-gasification reactor (LTS). The water gasification reactor (WGS) 450 may be further provided with a carbon monoxide remover to remove carbon monoxide (CO) after the high temperature water gasification reactor (HTS) or the low temperature water gasification reactor (LTS).

The optimum temperature of the high-temperature water gasification reactor (HTS) and the low-temperature water gasification reactor (LTS) depends on the type of catalyst used, and the composition of the discharged gas is determined by equilibrium of the control temperature. Although not shown in FIG. 4, 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, respectively. When the fuel cell system 200 according to an embodiment of the present invention includes a control unit 250 (shown in Fig. 2), the control unit 250 controls the cooler using a signal output from a temperature sensor. The temperatures of the high temperature water gasification reactor (HTS) and the low temperature water gasification reactor (LTS) are controlled. For example, the high-temperature water gasification reactor (HTS) is controlled within the range of 300 to 430 °C, and the low temperature water gasification reactor (LTS) is controlled within the range of 200 to 250 °C.

Although not shown, the carbon monoxide remover receives air from the air supply unit 130 and burns and removes only carbon monoxide (CO) from the gas supplied from the low-temperature water gasification reactor (LTS), or It may include a methanation reactor for reducing the concentration by reacting carbon monoxide (CO) with hydrogen (H ₂ ).

Although not shown in FIG. 6, the fuel cell system 200 according to the third embodiment of the present invention may be implemented by further including a humidifier that provides moisture to the fuel supplied from the water gasification reactor (WGS) 450. have. For example, when the fuel cell is implemented as a polymer electrolyte fuel cell (PEMFC), the electrolyte must contain appropriate moisture in order to maintain the ionic conductivity of the electrolyte used in the polymer electrolyte fuel cell (PEMFC). When the electrolyte is dried, ionic conductivity is lowered, and thus the operation of the polymer electrolyte fuel cell (PEMFC) is impossible, and thus a humidifier for supplying moisture to the fuel may be included.

Hereinafter, a configuration diagram of a fuel cell system 200 according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

7 is a configuration diagram according to an embodiment of the fuel cell system of FIG. 5.

Referring to FIG. 7, the fuel cell system according to the present invention includes a fuel cell 310, a raw material processing unit 410, a water separator 421, a first heat exchanger 422 for steam, a condenser 423, and a reformer 430. ), and a combustor 440 may be implemented. The fuel cell system according to the present invention is implemented to interlock with a diesel engine exhaust system including a diesel engine 810, an exhaust receiver 820, a supercharger 830, an evaporator 840, and a heater 850. The fuel cell system 200 according to the present invention includes the fuel cell 210, the raw material processing unit 410, the water separator 421, the first heat exchanger 422 for steam, the condenser 423, and the It may be implemented by including a reformer 430 and a controller 250 (shown in FIG. 2) that controls the operation of all components including the combustor 440.

The turbocharger 830 is also referred to as a turbocharger or a power turbine, and a turbine wheel driven by exhaust gas discharged from the combustion chamber of the diesel engine 810 and passed through the exhaust receiver 820 is a centrifugal air compressor. It is a device that increases the output and efficiency of the diesel engine by supplying high-density air to the diesel engine by being connected to the (or blower) to compress air. Although not shown, a selective catalytic reduction (SCR) reactor for reducing nitrogen oxides (NO _X ) contained in exhaust gas discharged from the supercharger 830 may be installed at the rear end of the supercharger 830 have. The exhaust gas discharged from the supercharger 830 is discharged to the outside through the evaporator 840 and the exhaust gas economizer in which the heater 850 is installed.

The fuel cell 310 of the fuel cell system according to the present invention may be a high-temperature fuel cell such as a solid oxide fuel cell (SOFC) or a molten carbonate fuel cell (MCFC). Fuel containing hydrogen required in the anode 313 of the solid oxide fuel cell (SOFC) is supplied from the reformer 430, and in the cathode 311 of the solid oxide fuel cell (SOFC) Required air may be supplied after being heated in the heater 850 of the exhaust gas economizer. The heated air supplied from the heater 850 of the exhaust gas economizer may be supplied to the combustor 440.

Unreacted residual substances such as carbon monoxide (CO) and hydrogen (H ₂ ) discharged from the anode 313 of the high-temperature fuel cell and water (H ₂ O) as a reaction product are supplied to the combustor 440 do. Exhaust gas including unreacted oxygen discharged from the cathode 311 of the fuel cell may be supplied to the combustor 440.

The raw material processing unit 410 includes an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from the raw material supply unit 110 including an LNG storage tank and a pump, and a first vaporizer 411 and a second vaporizer installed in the LNG evaporator. It may be implemented including a vaporizer 412. The first vaporizer 411 generates heat with high-temperature water (liquid or gaseous state) supplied from the water separator 421 and supplies water supplied from the water separator 421 to the evaporator 840. The second vaporizer 412 uses the waste heat of the exhaust gas supplied from the combustor 440 to convert the natural gas (NG) vaporized by the second vaporizer 412 into the reformer 430 and the combustor 440 ).

The water separator 421, the first heat exchanger 422 for steam, and the condenser 423 supply the steam (H ₂ O) to the reformer 430, as shown in FIG. 4 Configured). The water separator 421 receives water from a raw material water supply unit 120 including a raw material water storage tank, separates steam (gas H ₂ O) and moisture (liquid H ₂ O), and exhaust gas It may be implemented to supply water (liquid H ₂ O) separated by the evaporator 840 of the economizer. The water separator 421 may receive condensed water from the condenser 423. The water separator 421 supplies liquid water to the evaporator 840 of the exhaust gas economizer, and receives steam (H2O) from the evaporator 840. The water separator 421 supplies steam (H2O) to the reformer 430. Although not shown, steam (H2O) may be used for other purposes by installing a by-pass line in the recovery pipe circulating from the evaporator 840 to the water separator 421.

As shown in FIG. 7, a temperature sensing unit 74 for sensing the temperature of water supplied from the water separator 421 to the first vaporizer 411 is installed at a rear end of the water separator 421. The temperature sensing unit 74 is installed in the first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421.

A bypass part is formed at a rear end of the water separator 421 to bypass the water supplied from the water separator 421 to the first vaporizer 411 to the evaporator 840. The bypass unit includes a first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421 and a second fluid pipe connected to the evaporator 840 from the first vaporizer 411 A first on-off valve (A) installed in 76, a bypass pipe (77) connecting the first fluid pipe (75) and the second fluid pipe (76), and the bypass pipe (77) It may be implemented including a second on-off valve (B) installed on. The control unit 250 of the fuel cell system according to the present invention controls the first on/off valve (A) and the second on/off valve (B) according to a preset control program and Water supplied to 411 may be bypassed to the evaporator 840.

For example, the control unit 250 of the fuel cell system according to the present invention may be implemented to control the bypass unit according to a temperature detection signal input from the temperature detection unit 74. For example, when the temperature of water supplied from the water separator 421 to the first vaporizer 411 is equal to or higher than a preset temperature, the controller 250 closes the second on/off valve B and 1 By opening the on-off valve A, water is supplied from the water separator 421 to the first vaporizer 411. In the opposite case, the control unit 250 opens the second on/off valve B and closes the first on/off valve A, so that the evaporator 840 from the water separator 421 ) To supply water. In addition, the temperature sensing unit 74 supplies the heat required by the LNG evaporator 410 in response to the amount of fuel required by the fuel cell system 200, the first opening/closing valve A and the 2 The on/off valve (B) can be adjusted.

The first heat exchanger 422 for steam heat-exchanges the heated air supplied from the heater 850 of the diesel engine exhaust system and the steam (H2O) supplied from the water separator 421 to the reformer 430. . The high-temperature steam H2O heated in the first heat exchanger 422 for steam is supplied to the reformer 430. Air passing through the first heat exchanger 422 for steam may be supplied to the cathode 311 of the fuel cell 310.

The condenser 423 condenses the exhaust gas of the combustor 440 supplied from the second vaporizer 412. The condenser 423 may condense the exhaust gas of the combustor 440 and supply the condensed water to the water separator 421. As another example, water condensed in the condenser 423 may be supplied to the raw material water storage tank of the raw material water supply unit 120. In addition, the exhaust gas supplied from the fuel cell 310 to the combustor 440 is by-passed to be supplied to the second heat exchanger 424 supplied with the water condensed from the condenser 423, so that the condenser Water discharged from 423 may be heated in the second heat exchanger 424 and then supplied to the water separator 421.

The reformer 430 includes natural gas (NG) vaporized by a first vaporizer 411 and a second vaporizer 412 installed in the LNG evaporator, and steam supplied from the first heat exchanger 422 for steam ( H ₂ O) is reformed to produce a reformed gas, that is, a fuel containing hydrogen (H ₂ ).

The fuel cell 310 may be implemented as a low-temperature fuel cell such as a polymer electrolyte fuel cell (PEMFC) or a phosphoric acid fuel cell (PAFC). In this case, the high-temperature reforming gas generated in the reformer 430 contains carbon monoxide (CO) in addition to hydrogen (H ₂ ). Accordingly, the fuel cell system according to the present invention comprises a water gasification reactor (WGS) that reacts carbon monoxide (CO) and steam (H ₂ O) contained in the reformed gas to produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ). It may contain more.

Although not shown, when the polymer electrolyte fuel cell (PEMFC) is applied, a humidifier that provides moisture to the fuel supplied from the water gasification reactor (WGS) may be further included in the rear end of the water gasification reactor (WGS). In order to maintain the ionic conductivity of the electrolyte used in the polymer electrolyte fuel cell (PEMFC), the electrolyte must contain adequate moisture. When the electrolyte is dried, the ionic conductivity is lowered, making it impossible to operate the polymer electrolyte fuel cell (PEMFC).

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

8 is a schematic diagram showing an example of a ship according to the present invention.

Referring to Figures 1 to 8, the ship 900 according to the present invention is a power generation system 100 is installed in the hull 910. The power generation system 100 includes a fuel cell system 200. The fuel cell system 200 includes, for example, a fuel cell 210, a raw material processing unit 410, a water separator 421, a first heat exchanger 422 for steam, and a condenser 423 ( It may be implemented by including 420, reformer 430, and combustor 440.

The fuel cell system 200 is implemented to interlock with a diesel engine exhaust system including a diesel engine 810, an exhaust receiver 820, a supercharger 830, an evaporator 840, and a heater 850. The fuel cell system 200 according to the present invention includes all components including the fuel cell 210, the raw material processing unit 410, the raw material water treatment unit 420, the reformer 430, and the combustor 440, etc. It may be implemented including the control unit 250 that controls the operation of.

The diesel engine exhaust system 800 is a component included in a power generation system using a diesel engine, and purifies exhaust gas including environmental pollutants such as nitrogen oxides (NO _X ) generated in the combustion chamber of the diesel engine and generates heat. It is a device that collects and discharges it to the outside. The diesel engine exhaust system 800 may be equipped with a selective catalytic reduction (SCR) reactor to reduce nitrogen oxides (NO _X ) contained in exhaust gas. The diesel engine exhaust system 800 may include an economizer including an evaporator for evaporating water and a heater for heating air using waste heat of high-temperature exhaust gas discharged from the diesel engine.

The diesel fuel supply unit 710 includes a diesel fuel storage tank, and supplies diesel fuel from the diesel fuel storage tank to a diesel engine. The diesel fuel may be marine gas oil (MGO), marine diesel oil (MDO), general heavy oil (HFO), methanol, dimethyl ether (DME), and liquefied petroleum gas (LPG).

The fuel cell 210 is generated from an anode into which fuel including hydrogen is introduced, a cathode through which air, which is an oxidizing agent required for a fuel cell reaction, is introduced, and the anode and the cathode. It produces electricity, including an electrolyte that acts as a transport for ions. The fuel cell 210 is an alkaline fuel cell (AFC), a phosphoric acid fuel cell (PAFC), a molten carbonate fuel cell (MCFC), a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEMFC), or a direct methanol fuel. It may be a fuel cell selected from among cells (DMFC).

The raw material processing unit 410 includes an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from the raw material supply unit 110 including an LNG storage tank and a pump, and a first vaporizer 411 and a second vaporizer installed in the LNG evaporator. It may be implemented including a vaporizer 412. The first vaporizer 411 generates heat at the temperature of water supplied from the water separator 421 and supplies water supplied from the water separator 421 to the evaporator 840. The second vaporizer 412 generates heat by waste heat of the exhaust gas supplied from the combustor 440, and the natural gas (NG) vaporized by the first vaporizer 411 and the second vaporizer 412 is It is supplied to the reformer 430 and the combustor 440.

A temperature sensing unit 74 for sensing the temperature of water supplied from the water separator 421 to the first vaporizer 411 is installed at a rear end of the water separator 421. The temperature sensing unit 74 is installed in the first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421.

A bypass part is formed at a rear end of the water separator 421 to bypass the water supplied from the water separator 421 to the first vaporizer 411 to the evaporator 840. The bypass unit includes a first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421 and a second fluid pipe connected to the evaporator 840 from the first vaporizer 411 A first on-off valve (A) installed in 76, a bypass pipe (77) connecting the first fluid pipe (75) and the second fluid pipe (76), and the bypass pipe (77) It may be implemented including a second on-off valve (B) installed on.

For example, the control unit 250 of the fuel cell system according to the present invention may be implemented to control the bypass unit according to a temperature sensing signal input from the temperature sensing unit 74. For example, when the temperature of water supplied from the water separator 421 to the first vaporizer 411 is equal to or higher than a preset temperature, the controller 250 closes the second on/off valve B and 1 By opening the on-off valve A, water is supplied from the water separator 421 to the first vaporizer 411. In the opposite case, the control unit 250 opens the second on/off valve B and closes the first on/off valve A, so that the evaporator 840 from the water separator 421 ) To supply water. In addition, in order to supply heat required by the LNG evaporator 410 in response to the amount of fuel required by the fuel cell system 200, the temperature sensing unit 74 includes the first opening/closing valve A and the The second on-off valve (B) can be adjusted.

The first heat exchanger 422 for steam includes heated air supplied from the heater 850 of the diesel engine exhaust system and steam (H ₂ O) supplied from the water separator 421 to the reformer 430 Heat exchange. The high-temperature steam (H ₂ O) heated in the first heat exchanger 422 for steam is supplied to the reformer 430. Air passing through the first heat exchanger 422 for steam may be supplied to the cathode 311 of the fuel cell 310.

The reformer 430 includes natural gas (NG) vaporized by a first vaporizer 411 and a second vaporizer 412 installed in the LNG evaporator, and steam (H) supplied from the first heat exchanger 422 for steam. ₂ O) is reformed to produce a reformed gas, that is, a fuel containing hydrogen (H ₂ ).

The fuel cell 310 may be implemented as a polymer electrolyte fuel cell (PEMFC). In this case, the high-temperature reforming gas generated in the reformer 430 contains carbon monoxide (CO) in addition to hydrogen (H ₂ ). Accordingly, the fuel cell system according to the present invention comprises a water gasification reactor (WGS) that reacts carbon monoxide (CO) and steam (H ₂ O) contained in the reformed gas to produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ). It may contain more.

1 to 9, the hull 910 forms the overall appearance of the ship 900 according to the present invention. The hull 910 is provided with an engine generating a propulsive force to move the hull 910 and a raw material supply unit supplying raw materials to the engine. For example, raw materials are hydrocarbon-based materials, such as LNG (liquefied natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), gasoline, dimethyl ether, methane gas, It may be a liquid raw material having a relatively high molecular weight, such as hydrogen-purified off-gas, pure hydrogen, and marine gas oil (MGO), marine diesel oil (MDO), and general heavy oil (HFO).

A raw material water storage tank for storing raw material water and a raw material water supply unit 120 for supplying raw material water from the raw material water storage tank are installed in the hull 910. The raw material water may be, for example, fresh water or sea water. As another example, the raw material water may be fresh water or water in which impurities have been removed from seawater.

An air supply unit 130 for supplying air to the fuel cell system 200 is installed in the hull 910. Typically, air refers to a gas including nitrogen, oxygen, carbon dioxide, and the like, but in the present specification, nitrogen, carbon dioxide, or both gases are removed from the air. The air supply unit 130 may include an air storage tank and a device (eg, a blower) supplying air from the air storage tank. As another example, the air supply unit 130 may be implemented to supply compressed high-pressure air after receiving and compressing external air, or supplying it at normal pressure after removing impurities from external air.

The hull 910 includes a DC-DC converter for boosting or reducing the output voltage from the fuel cell system 200 and a DC-AC inverter for converting DC current to AC current. Conversion unit is installed. The power conversion unit discharges electricity supplied from the fuel cell system 200 to a power load. For example, in the case of a ship, the power load may be an electrical equipment in a ship such as basic electrical equipment of a ship and electric equipment of a cargo system. Although not shown, the power conversion unit may be implemented to supply electricity to an energy storage device, for example, a battery.

In this specification, the term "ship" is not limited to mean a structure sailing on the water, as well as a structure that sails on the water, as well as a floating crude oil production storage and handling facility (FPSO) that floats on the water and performs work. Includes the same marine structure.

Until now, the present specification has been described with reference to the embodiments shown in the drawings so that those of ordinary skill in the art to which the present invention belongs can easily understand and reproduce the present invention. Those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible from the embodiments of the present invention. Therefore, the true technical protection scope of the present invention should be determined only by the appended claims.

100: power generation system
110: raw material supply unit 120: raw material water supply unit
130: air supply unit 140: power conversion unit
200: fuel cell system
411: first carburetor 412: second carburetor
421: water separator 422: first heat exchanger for steam
423: condenser 424: second heat exchanger
800: diesel engine exhaust system
810: engine
820: exhaust receiver 830: supercharger
840: evaporator 850: burner

Claims (9)

As a ship,
A diesel engine exhaust system having an evaporator generating steam (H ₂ O) by evaporating water with waste heat of exhaust gas discharged from the diesel engine;
A fuel cell system interlocking with the diesel engine exhaust system; And
Including a power conversion unit for converting the direct current (DC) output from the fuel cell system into an alternating current (AC),
The fuel cell system,
A reformer for generating reformed gas by reforming the gas supplied from the LNG evaporator for evaporating LNG and the steam (H ₂ O) supplied from the evaporator of the diesel engine exhaust system;
A combustor for heating the reformer;
A fuel cell receiving the reformed gas and generating electricity;
A steam separator for receiving steam (H ₂ O) from an evaporator of the diesel engine exhaust system, separating steam (H ₂ O) from liquid water, and supplying steam (H ₂ O) to the reformer;
A first vaporizer that is installed in the LNG evaporator, generates heat with high-temperature water supplied from the water separator, and supplies water supplied from the water separator to the evaporator of the diesel engine exhaust system; And
A ship comprising a bypass unit for bypassing the water supplied from the water separator to the first vaporizer to the evaporator of the diesel engine exhaust system. The method of claim 1,
The diesel engine exhaust system includes a heater for heating air using waste heat of exhaust gas discharged from the diesel engine as a heat source,
The vessel, characterized in that the heater supplies heated air to a cathode of the fuel cell. The method of claim 2,
The fuel cell system comprises a first heat exchanger for heat exchange of heated air supplied from a heater of the diesel engine exhaust system and steam (H2O) supplied from the water separator to the reformer. As a fuel cell system interlocking with the diesel engine exhaust system,
A reformer for generating reformed gas by reforming the gas supplied from the LNG evaporator for evaporating LNG and the steam (H ₂ O) supplied from the evaporator of the diesel engine exhaust system;
A combustor for heating the reformer;
A fuel cell receiving the reformed gas and generating electricity;
A steam separator for receiving steam (H ₂ O) from an evaporator of the diesel engine exhaust system, separating steam (H ₂ O) from liquid water, and supplying steam (H ₂ O) to the reformer;
A first vaporizer that is installed in the LNG evaporator, generates heat with high-temperature water supplied from the water separator, and supplies water supplied from the water separator to the evaporator of the diesel engine exhaust system; And
And a bypass unit for bypassing water supplied from the water separator to the first vaporizer to an evaporator of the diesel engine exhaust system. delete The method of claim 4,
A temperature sensing unit sensing the temperature of water supplied from the water separator to the first vaporizer; And
And a control unit for controlling the bypass unit according to a temperature sensing signal input from the temperature sensing unit. The method of claim 4,
And a second vaporizer installed in the LNG evaporator to generate heat with waste heat of exhaust gas supplied from the combustor. The method of claim 4,
Wherein the combustor receives exhaust gas from an anode or a cathode of the fuel cell and uses it for a combustion reaction. The method of claim 4,
And a water gasification reactor that reduces the concentration of carbon monoxide (CO) contained in the reformed gas supplied from the reformer.

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