KR20170076917A - Ship - Google Patents

Abstract

The present invention relates to a diesel engine exhaust system having an evaporator for evaporating water to waste heat of exhaust gas discharged from a diesel engine to generate steam (H ₂ O), a fuel cell system interlocked with the diesel engine exhaust system, And a power conversion section for converting a direct current (DC) output from the system into an alternating 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. Environmentally friendly power generation systems have been developed to solve the problems associated with the use of such fossil fuels.

Environmentally friendly power generation systems include power generation systems that produce electricity by converting renewable energy, including sunlight, water, geothermal, precipitation, and bio-organisms. In addition, an environmentally friendly power generation system includes a fuel cell system that includes a fuel cell that converts fossil fuel or generates electricity through a chemical reaction such as hydrogen and oxygen.

Alkaline fuel cell (AFC), phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC), solid oxide fuel cell (MCFC), and solid oxide fuel cell (SOFC), a polymer electrolyte membrane fuel cell (PEMFC), and a direct methanol fuel cell (DMFC). Each of these fuel cells operates on essentially the same principle, but the operating temperature, electrolyte, power generation efficiency, and power generation performance are different.

On the other hand, in a train, a ship, and an industrial vehicle, a power generation system that uses a diesel engine to generate necessary electric power is commonly used. However, the power generation system using the diesel engine has a thermal efficiency of 30 to 40%, and environmental pollutants such as carbon dioxide (CO ₂ ), sulfur oxides (SO _x ) and nitrogen oxides (NO _x ) . In recent years, the industry has been studying new ways to respond to global environmental pollution regulations while developing necessary power by using diesel engine-based power generation system and environmentally friendly power generation system, fuel cell system.

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

First, if a power generation system using a diesel engine and a fuel cell system are installed in one structure, there is a problem that the cost of constructing a structure is increased.

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

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a ship capable of reducing installation cost and operating cost.

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

In order to solve the above-described problems, the present invention can include the following configuration.

A ship according to the present invention is a diesel engine exhaust system having an evaporator that evaporates water to waste heat of exhaust gas discharged from a diesel engine to generate steam (H ₂ O); A fuel cell system interlocked with the diesel engine exhaust system; And a power converter 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 supply unit for supplying a gas supplied from an LNG evaporator for evaporating LNG, A reformer for reforming steam (H ₂ O) supplied from the evaporator to generate a reformed gas, a combustor for heating the reformer, a fuel cell for generating electricity by receiving the reformed gas, steam from the evaporator of the diesel engine exhaust system (H ₂ O) to supply receiving steam (H2O) and separating the liquid water, the heating steam (H2O) separator to be supplied to the reformer, and water of a high temperature supplied from the separator and from the separator And a first vaporizer for supplying water to the evaporator of the diesel engine exhaust system.

In the vessel according to the present invention, the diesel engine exhaust system includes a heater that heats the air using waste heat of the exhaust gas discharged from the diesel engine as a heat source, the heater supplies heated air to the cathode of the fuel cell .

In the vessel according to the present invention, the diesel engine exhaust system includes a heater for heating the air using waste heat of the 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 And a first heat exchanger for steam that exchanges heat between the heated air and the steam (H2O) supplied to the reformer from the water separator.

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

The present invention is implemented so that the waste heat of the exhaust gas of the diesel engine discharged to the outside through the diesel engine exhaust system 800 is used as a heat source for vaporizing the LNG (liquefied natural gas), so that the LNG It is possible to reduce the amount of fuel and 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 a single structure, it can contribute to reduce facility construction cost and operation cost.

The present invention is embodied such that the combustor is supplied with the unreacted residual material and the reaction product from the anode of the fuel cell or the anode of the fuel cell to be used for the combustion reaction, Can contribute to reducing environmental pollution due to increased atmospheric emissions.

The present invention relates to a process for producing water by condensing an unreacted residual substance discharged from an anode and an anode of a fuel cell and an exhaust gas produced by burning a reaction product in a combustor, And the steam is heated by the waste heat of the diesel engine exhaust gas discharged to the outside through the gas economizer so that the heat source for the raw water for generating and supplying the steam required in the reformer and the external supply amount of the raw water can be reduced , The efficiency of the power generation system can be increased.

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

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

Referring to FIG. 1, a fuel cell system 200 according to the present invention is applied to a power generation system 100 to perform a function of generating electricity. Before describing the fuel cell system 200 according to the present invention, the power generation system 100 will be described first.

The power generation system 100 includes a raw material supply unit 110, a raw 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, the raw material is a material of a hydrocarbon series, LNG (liquefied natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), petrol, dimethyl ether, methane, Hydrogen purification off-gas, pure hydrogen, or the like.

For example, when the power generation system 100 is applied to an automobile, the raw material supply unit 110 is implemented including a raw material storage tank and a device (for example, 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 the 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 is implemented including a diesel fuel storage tank and an apparatus for supplying diesel fuel from the diesel fuel storage tank.

The raw water supply part 120 may include a raw water storage tank and a device (for example, a pump) for supplying the raw water stored in the raw water storage tank. The raw water may be, for example, water (constant water), fresh water, or seawater. As another example, the raw water may be impurity-treated water or ion-removed water in fresh water or seawater. As another example, the raw water may be water in the state where impurities are removed from fresh water or seawater.

The air supply unit 130 supplies air to the fuel cell system 200 according to the present invention. Normally, air means a gas including nitrogen, oxygen, carbon dioxide and the like, but also includes the case where nitrogen or carbon dioxide is removed from air or all gases other than oxygen are removed. The air supply unit 130 may include an air storage tank and a device (for example, a blower) for supplying air from the air storage tank. As another example, the air supply unit 130 may be configured to supply external air and compress the high-pressure air, or supply the compressed high-pressure air at normal pressure.

The power conversion unit 140 converts the direct current (DC) output 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 converter for converting a direct current (DC) An inverter or the like. The power conversion unit 140 discharges the electric power supplied from the fuel cell system 200 according to the present invention to the electric power load. The electric power load may be, for example, in-ship electrical equipment such as a ship's basic electrical equipment and cargo-system electrical equipment in the case of a ship. 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 produces electricity using fuel, water (H ₂ O), and air. The fuel cell system 200 according to the present invention can be used in a small structure such as a home or an automobile, and can be used in a large structure such as a ship. The fuel cell system 200 according to the present invention may be implemented to operate in conjunction with a diesel engine, a gas engine, a steam turbine, a gas turbine, or a Rankine Cycle that uses the combustion energy of the 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 generation unit 400. The fuel cell system 200 according to the present invention may be implemented by including a controller 250 for controlling all operations including the fuel cell 210, the hydrogen generator 400, and the like. In this specification, what is introduced into the hydrogen generator 400 is defined as the raw material and the raw water, and the fuel that is generated in the hydrogen generator 400 and introduced into the fuel cell 210 is defined as fuel.

The fuel cell 210 is implemented including a fuel cell stack. The fuel cell stack has an electrolyte layer formed between a cathode and an anode and a separator for supplying hydrogen and supplying air and recovering heat to the anode and the cathode And the unit cell modules are connected in series by the required number of units.

The fuel cell 210 may include a temperature sensor and a device for maintaining temperature, that is, a heater, a cathode fan, a fuel electrode fan, a cooling plate, and the like. The temperature sensor senses the temperature of the fuel cell stack, the temperature of the cathode, and the temperature of the anode. The heater can heat the fuel cell to maintain the temperature required for the operation. The air cathode fan dissipates heat generated at the cathode of the fuel cell stack. The fuel electrode fan dissipates the heat generated from the anode of the fuel cell stack. The air cathode fan and the anode cathode 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, the cathode fan, and the anode electrode fan using the signal output from the temperature sensor, ) Is appropriately maintained. For example, the control unit 250 maintains the operating temperature of the phosphoric acid fuel cell (PAFC) at 190 to 210 ° C, maintains the operating temperature of the MCFC at 550 to 650 ° C, In the case of oxide fuel cells (SOFC), the operating temperature is maintained at 650 to 1000 ° C. For polymer electrolyte fuel cells (PEMFC), the operating temperature is maintained at 30 to 80 ° C.

Hereinafter, the operation of the fuel cell 210 included in the fuel cell system 200 according to the present invention will be described with reference to FIGS. 3A and 3B. FIG. 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).

3A, a solid oxide fuel cell (SOFC) 310 includes a cathode 311, an anode 313, and a cathode 313. The anode 313 is connected to the anode 312 through an electrolyte 312, . Fuel containing hydrogen (H ₂ ) flows in the anode 313 and oxygen ions O ^2- and hydrogen H ₂ which have moved to the anode 313 through the electrolyte 312 are introduced into the anode 313, (H ₂ O) and electrons (e-) are generated by electrochemical reaction. 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) is a fuel electrode (anode) (313) unreacted and electrochemical unreacted material as a the fuel carbon monoxide (CO), carbon dioxide (CO ₂₎ that may be included in the feed to hydrogen (H ₂ ) And the water (liquid or gaseous H ₂ O) as the reaction product. In addition, unreacted oxygen and nitrogen are discharged from the cathode 311 of the solid oxide fuel cell (SOFC) 310.

Referring to FIG. 3B, the PEMFC 320 includes a catalyst layer 322 formed on the anode 321, and hydrogen (H ₂ ) is generated as hydrogen ions (H ⁺ ) and electrons (e-) do. The hydrogen ions H ⁺ move to the cathode 324 through the polymer electrolyte membrane 323. The polymer electrolyte fuel cell (PEMFC) 320 reacts with hydrogen ions (H ⁺ ) and oxygen (O ₂ ) in the catalyst layer 325 formed on the cathode 324 to produce steam (H ₂ O). 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 material 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 the MCFC, hydrogen (H ₂ ) and carbonic acid ions (CO ₃ ^2- ) react with each other in the anode to form water (H ₂ O), carbon dioxide (CO ₂ ) Is generated. The generated carbon dioxide (CO ₂ ) is sent to the cathode, and carbon dioxide (CO ₂ ) and oxygen (O ₂ ) react with each other at the cathode to produce carbonate ion (CO ₃ ^2- ). Carbonate ions (CO ₃ ^2- ) move through the electrolyte to the anode. In a molten carbonate fuel cell (MCFC), carbon dioxide (CO ₂ ) generated in the process of generating electricity can be implemented to be circulated in the fuel cell without being discharged to the outside.

2 and 4, the hydrogen generator 400 includes an apparatus for generating a fuel, that is, hydrogen (H ₂ ) gas, necessary for the anode of the fuel cell 210 using the raw material. In the present specification, the fuel that is generated in the hydrogen generator 400 and introduced into the fuel cell 210 is defined as the fuel that is introduced into the hydrogen generator 400 as raw material and raw water.

The hydrogen generator 400 may be designed to have various structures depending on the type of the 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 generator 400 may include a reformer and a combustor . In another example, when the fuel cell 210 is a PAFC or a PEMFC, the hydrogen generator 400 may be a water gas shift reactor , ≪ / RTI > WGS).

The water gasification reactor (WGS) may be a high temperature shift reactor (HTS), a mid-temperature shift reactor (MTS), a low-temperature shift reactor (LTS) Or a carbon monoxide remover. The carbon monoxide remover may include a selective oxidation reactor (PROX) for burning and removing only carbon monoxide (CO), or a methanation reactor for reducing carbon monoxide (CO) to hydrogen (H ₂ ) .

Referring to FIG. 4, an example of the hydrogen generator 400 in the fuel cell system 200 according to the present invention will be described as follows.

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

The raw material processing unit 410 preprocesses the raw material supplied from the raw material supply unit including the raw material storage tank. For example, the raw material treatment unit 410 may include an LNG evaporator for evaporating the liquefied natural gas supplied from the LNG storage tank and a vaporizer installed in the LNG evaporator. When 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., 410 includes 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 catalyzing the heated raw material . The raw material treatment unit 410 may include a filter for removing impurities contained in the raw material, and a desulfurizer for removing sulfide.

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

The reformer 430 reforms the pre-treated raw material supplied from the raw material treatment unit 410 and the steam (H ₂ O) supplied from the raw water treatment unit 420 to supply hydrogen (H ₂ ) Thereby generating a reforming gas. In the reforming reaction, the reformer 330 may use thermal energy provided by the combustor 440. Hereinafter, the reformed gas from the reformer 330 is defined as a fuel.

The reformer 430 is implemented with a reforming catalyst layer that triggers a reforming reaction. The reforming catalyst layer has a structure in which the reforming catalyst is packed with a catalyst supported on the carrier. The reforming catalyst is composed of nickel (Ni), ruthenium (Ru), platinum (Pt) or the like. The shape of the carrier carrying the catalyst may be, for example, granular, pellet or honeycomb, Resistant metal such as alumina (Al ₂ O ₃ ), titania (TiO ₂ ), or the like.

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

The combustor 440 provides heat to the reformer 430 to smoothly perform the reforming reaction. When the reformer heating temperature by the combustor 440 is low, the reforming reaction by the endothermic reaction of the reformer 430 does not progress well and moisture (water droplets) is generated in the reformer 430 . If the heating temperature of the combustor 440 is high, the catalytic activity of the reforming catalyst layer of the reformer 430 may be lowered.

The combustor 440 is connected to the raw material pretreated in the raw material treatment section 410, the exhaust gas discharged from the anode of the fuel cell stack of the fuel cell 210, 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 further use air discharged from the cathode of the fuel cell stack of the fuel cell 210.

Although not shown, the hydrogen generator 400 may further include at least one temperature sensor, which detects the temperature of the reformer 430. The temperature of the reformer 430 may be adjusted according to 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. 2), the control unit 250 controls the amount of combustion of the combustor 440 based on the signal output from the temperature sensor, And the temperature of the reformer 430 is controlled. For example, the controller 250 may be configured to control the temperature 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), carbon dioxide (CO ₂ ), and the like. 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. In order to reduce the concentration of carbon monoxide (CO) to 10 to 20 ppm or less, the hydrogen generating unit 400 may further include a water gasification reactor (WGS) 450.

The water gasification reactor (WGS) 450 can produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) by reacting carbon monoxide (CO) with steam (H ₂ O). The water gasification reactor (WGS) 450 may be implemented with a high temperature aqueous gasification reactor (HTS) and a low temperature aqueous gasification reactor (LTS) as shown in FIG.

The optimum temperature of the high temperature aqueous gasification reactor (HTS) and the low temperature aqueous gasification reactor (LTS) varies depending on the type of the catalyst used and the composition of the gas discharged by the equilibrium of the control temperature is determined. Although not shown in FIG. 4, a cooler and a temperature sensor may be installed in the high temperature aqueous gasification reactor (HTS) and the low temperature aqueous gasification reactor (LTS), respectively. When the fuel cell system 200 according to the present invention includes the controller 250 (shown in FIG. 2), the controller 250 controls the cooler using the signal output from the temperature sensor, (HTS) and the temperature of the low temperature aqueous gasification reactor (LTS). For example, the high temperature aqueous gasification reactor (HTS) is controlled within a range of 300 to 430 ° C, and the low temperature aqueous gasification reactor (LTS) is controlled within a 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 is not completely treated in the low temperature aqueous gasification reactor (LTS) at the end of the low temperature water gasification reactor (LTS). The carbon monoxide remover includes a selective oxidation unit (PROX) for supplying air from an air supply unit and burning only CO in the gas supplied from the low temperature aqueous gasification reactor (LTS) H ₂ ) to reduce the concentration thereof.

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 the control unit 250 (shown in FIG. 2), the control unit 250 controls the cooler using the signal output from the temperature sensor, ). For example, the selective oxidation reactor (PROX) is controlled within the range of 120 to 160 占 폚. However, the optimal 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 for supporting a selective oxidation catalyst. The selective oxidation catalyst is made of platinum (Pt) or the like, and the shape of the support carrying the catalyst may be, for example, a granular shape, a pellet shape, a honeycomb shape, etc. The material constituting the support may be alumina (Al ₂ O ₃ ) , Magnesium oxide (MgO), and the like.

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. 1 to 4, the same reference numerals are used.

5, the fuel cell system 200 according to the second embodiment of the present invention includes a fuel cell 210, a raw material treatment unit 410, a raw water treatment unit 420, a reformer 430, and a combustor 440 ). ≪ / RTI > The fuel cell system 200 according to the second embodiment of the present invention is implemented to operate in conjunction with a diesel engine exhaust system 800 including a diesel engine.

The diesel engine exhaust system 800 is included in a power generation system using a diesel engine. The diesel engine exhaust system 800 purifies the exhaust gas containing environmental pollutants such as nitrogen oxides (NO _x ) generated in the combustion chamber of the diesel engine, And discharges the heat to the outside. In the diesel engine exhaust system 800, a selective catalytic reduction (SCR) may be installed to reduce nitrogen oxides (NO _x ) and the like contained in the exhaust gas. The diesel engine exhaust system 800 may be implemented with an economizer including an evaporator for evaporating water using waste heat of hot exhaust gas discharged from a diesel engine, and a heater for heating the air.

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 a marine gas oil (MGO), a marine diesel oil (MDO), a general heavy oil (HFO), a methanol, a dimethyl ether (DME), and a liquefied petroleum gas (LPG).

The fuel cell 210 includes an anode through which fuel containing hydrogen flows, a cathode through which air, which is an oxidant required for the fuel cell reaction, flows in, and a cathode formed from the anode and the cathode. And an electrolyte that acts as a transferring of the generated ions. The fuel cell 210 may be 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) And may be a fuel cell selected from batteries (DMFC).

The raw material processing unit 410 preprocesses the raw material supplied from the raw material supply unit 110 including the raw material storage tank. For example, the raw material treatment unit 410 may include an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from the 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 can use the waste heat of the exhaust gas supplied from the combustor 440 as a heat source for vaporizing LNG (liquefied natural gas) in the LNG evaporator.

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

The raw water water treatment unit 420 prepares raw water supplied from the raw water supply unit 120 including the raw water storage tank. The raw water may be, for example, water (constant water), fresh water, or seawater. As another example, the raw water may be impurity-treated water or ion-removed water in fresh water or seawater. As another example, the raw water may be water in the state where impurities are removed from fresh water or seawater.

The raw water treatment unit 420 generates steam (H ₂ O) by heating the raw water and supplies the steam (H ₂ O) to the reformer 430. The diesel engine exhaust system 800 can generate steam (H ₂ O) by evaporating water to 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) And a steam separator for supplying steam to the reformer 430.

The reformer 430 performs a reforming reaction of the pre-treated raw material supplied from the raw material processing unit 410 and steam (H ₂ O) supplied from the raw water treatment unit 420 to supply the reformed gas, that is, hydrogen (H ₂ ) ≪ / RTI > The fuel produced by the reformer 430 may include carbon monoxide (CO) in addition to hydrogen (H ₂ ). Although not shown, the hydrogen generator 400 may include the aqueous gasification reactor 450 to lower the CO concentration of the fuel supplied to the fuel cell 210.

The combustor 440 provides the heat source necessary for the reformer 430. The combustor 440 may be configured to receive the unreacted residual material and the reaction product from the anode of the fuel cell 210 or the anode of the fuel cell 210 and use it for the combustion reaction.

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

First, the fuel cell system 200 according to the second embodiment of the present invention is a system in which the waste heat of the exhaust gas of the diesel engine exhausted to the outside through the diesel engine exhaust system 800 is used as a heat source for vaporizing LNG (liquefied natural gas) It is possible to omit the heating device which was provided for heating the LNG (liquefied natural gas) in the conventional fuel cell system, so that the fuel and electricity supplied to the 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 a single structure, it can contribute to reduce facility construction cost and operation cost.

Secondly, the fuel cell system 200 according to the second embodiment of the present invention is configured such that the combustor 440 is not reacted from the anode of the fuel cell 210 or the anode of the fuel cell 210 The residual material and the reaction product are supplied to the fuel cell 210 for use in the combustion reaction, thereby contributing to the reduction of environmental pollution due to an increase in the amount 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 generates water by condensing the exhaust gas combusted in the combustor 440, supplies the produced water to the water separator, and supplies the water through the exhaust gas economizer Since the heat source for heating the raw water and the external supply amount of the raw water to the raw water for generating and supplying the steam required in the reformer can be reduced by being implemented with the waste heat of the diesel engine exhaust gas discharged to the outside to produce steam, Can be increased.

6 is a conceptual configuration diagram of a fuel cell system according to a third embodiment of the present invention. 1 to 5, the same reference numerals are used.

6, the fuel cell system 200 according to the third embodiment of the present invention includes a fuel cell 210, a raw material treatment unit 410, a raw water treatment unit 420, a reformer 430, a combustor 440, , And a water gasification reactor (WGS) 450. The fuel cell system 200 according to the third embodiment of the present invention is implemented to operate in conjunction 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 reformed gas from the reformer 430. The water 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 embodied as a high temperature aqueous gasification reactor (HTS), for example. The water gasification reactor (WGS) 450 may, for example, be implemented with a hot water gasification reactor (HTS) and a low temperature aqueous gasification reactor (LTS). The water gasification reactor (WGS) 450 may further include a carbon monoxide remover for removing carbon monoxide (CO) at the downstream of the high temperature aqueous gasification reactor (HTS) or the low temperature aqueous gasification reactor (LTS).

The optimum temperature of the high temperature aqueous gasification reactor (HTS) and the low temperature aqueous gasification reactor (LTS) varies depending on the type of the catalyst used and the composition of the gas discharged by the equilibrium of the control temperature is determined. Although not shown in FIG. 4, a cooler and a temperature sensor may be installed in the high temperature aqueous gasification reactor (HTS) and the low temperature aqueous gasification reactor (LTS), respectively. In the case where the fuel cell system 200 according to the embodiment of the present invention includes the controller 250 (shown in FIG. 2), the controller 250 controls the cooler using the signal output from the temperature sensor, Temperature gasification reactor (HTS) and the low temperature aqueous gasification reactor (LTS). For example, the high temperature aqueous gasification reactor (HTS) is controlled within a range of 300 to 430 ° C, and the low temperature aqueous gasification reactor (LTS) is controlled within a range of 200 to 250 ° C.

Although not shown, the carbon monoxide remover may be a selective oxidation unit (PROX) that receives air from the air supply unit 130 and burns only carbon monoxide (CO) in the gas supplied from the low temperature aqueous gasification reactor (LTS) And a methanation reactor in which carbon monoxide (CO) is reacted with hydrogen (H ₂ ) to reduce its concentration.

Although not shown in FIG. 6, the fuel cell system 200 according to the third embodiment of the present invention may further include a humidifier for supplying water 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 an appropriate amount of water to maintain ionic conductivity of the electrolyte used in the PEMFC. The polymer electrolyte fuel cell (PEMFC) can not be operated because the ion conductivity is lowered when the electrolyte is dried, so that 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.

FIG. 7 is a configuration diagram according to the embodiment of the fuel cell system of FIG. 5; 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, a reformer 430 ), And a combustor 440, as shown in FIG. The fuel cell system according to the present invention is implemented to operate in conjunction 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 may include the fuel cell 210, the raw material processing unit 410, the water separator 421, the first heat exchanger 422 for steam, the condenser 423, A reformer 430, and the combustor 440. The control unit 250 controls the operation of all components including the combustor 440 and the like.

The turbine wheel driven by the exhaust gas discharged from the combustion chamber of the diesel engine 810 and passing through the exhaust receiver 820 is supplied to the centrifugal air compressor 830. The turbocharger 830 is a turbocharger or a power turbine, (Or blower) to compress the air, thereby supplying high-density air to the diesel engine, thereby increasing the output and efficiency of the diesel engine. Although not shown, a selective catalytic reduction (SCR) for reducing nitrogen oxides (NO _x ) contained in the exhaust gas discharged from the turbocharger 830 may be installed at the rear end of the turbocharger 830 have. The exhaust gas discharged from the supercharger 830 is discharged to the outside through the evaporator 840 and the exhaust gas economizer provided with the heater 850.

The fuel cell 310 of the fuel cell system according to the present invention may be a high temperature type fuel cell such as a solid oxide fuel cell (SOFC) or a molten carbonate fuel cell (MCFC). A fuel containing hydrogen required at the anode 313 of the SOFC is supplied from the reformer 430 and is supplied to the cathode 311 of the SOFC The required air can be supplied after heating 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 type fuel cell and water (H ₂ O) which is a reaction product are supplied to the combustor 440 do. Exhaust gas containing unreacted oxygen discharged from the cathode 311 of the fuel cell may be supplied to the combustor 440.

The raw material treatment unit 410 includes an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from a raw material supply unit 110 including an LNG storage tank and a pump, a first vaporizer 411 installed in the LNG vaporizer, A vaporizer 412 may be included. The first vaporizer 411 generates heat to a 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 and the natural gas NG vaporized by the second vaporizer 412 is supplied to the reformer 430 and the combustor 440 ).

The water separator 421, the steam first heat exchanger 422 and the condenser 423 are connected to a raw water treatment section 420 for supplying steam (H ₂ O) to the reformer 430 . The water separator 421 separates steam (H ₂ O in the gaseous state) and water (H ₂ O in the liquid state) by receiving water from the raw water supply unit 120 including the raw water storage tank, (Liquid H ₂ O) separated by the evaporator 840 of the economizer. The water separator 421 can 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, a by-pass line may be provided in the recovery pipe circulating from the evaporator 840 to the water separator 421, so that steam (H2O) may be used for other purposes.

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 the downstream 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 unit for bypassing water supplied from the water separator 421 to the first vaporizer 411 to the evaporator 840 is formed at a rear end of the water separator 421. The bypass section includes a first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421 and a second fluid pipe 75 connected to the evaporator 840 from the first vaporizer 411. [ A bypass pipe 77 connecting the first fluid pipe 75 and the second fluid pipe 76 to each other and a bypass pipe 77 connecting the first fluid pipe 75 and the second fluid pipe 76, And a second opening / closing valve (B) installed in the second opening / closing valve. 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 in accordance with a predetermined control program, The water supplied to the evaporator 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 configured to control the bypass unit according to a temperature sensing signal input from the temperature sensing unit 74. For example, when the temperature of the water supplied from the water separator 421 to the first vaporizer 411 is equal to or higher than a predetermined temperature, the control unit 250 closes the second on-off valve B, Water is supplied from the water separator 421 to the first vaporizer 411 by opening the first opening and closing valve A. [ The control unit 250 opens the second on-off valve B and closes the first on-off valve A so that the evaporator 840 ). In order to supply the required heat from the LNG evaporator 410 in correspondence with the amount of fuel required in the fuel cell system 200, the temperature sensing unit 74 may be connected to the first on- 2 open / close valve (B) can be adjusted.

The steam first heat exchanger 422 exchanges heat between 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 by the steam first heat exchanger (422) is supplied to the reformer (430). The air passing through the steam first heat exchanger 422 can 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 can condense the exhaust gas of the combustor 440 and supply the condensed water to the water separator 421. As another example, the condensed water in the condenser 423 may be supplied to the raw water storage tank of the raw water supply unit 120. The fuel cell 310 bypasses the exhaust gas supplied to the combustor 440 and supplies the exhaust gas to the second heat exchanger 424 through which the condensed water is supplied from the condenser 423, The water discharged from the second heat exchanger 423 may be heated by the second heat exchanger 424 and then supplied to the water separator 421.

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

The fuel cell 310 may be implemented as a low temperature type fuel cell such as a polymer electrolyte fuel cell (PEMFC) or a phosphoric acid fuel cell (PAFC). In this case, the high-temperature reformed gas generated in the reformer 430 includes carbon monoxide (CO) in addition to hydrogen (H ₂ ). The fuel cell system according to the present invention includes a water gasification reactor (WGS) for producing carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) by reacting carbon monoxide (CO) and steam (H ₂ O) contained in the reformed gas .

Although not shown, when the PEMFC is applied, the water gasification reactor (WGS) may further include a humidifier for supplying moisture to the fuel supplied from the water gasification reactor (WGS). In order to maintain the ionic conductivity of the electrolyte used in the PEMFC, the electrolyte must contain appropriate moisture. When the electrolyte is dried, ion conductivity is lowered and the PEMFC can not be operated.

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

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

Referring to FIGS. 1 to 8, a ship 900 according to the present invention is provided with a power generation system 100 on a ship 910. The power generation system 100 includes a fuel cell system 200. The fuel cell system 200 includes a raw water treatment unit including a fuel cell 210, a raw material treatment unit 410, a water separator 421, a first heat exchanger 422 for steam, and a condenser 423, 420, a reformer 430, and a combustor 440.

The fuel cell system 200 is implemented to operate in conjunction 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 treatment unit 410, the raw water treatment unit 420, the reformer 430, and the combustor 440 And a control unit 250 for controlling the operation of the control unit 250. [

The diesel engine exhaust system 800 is included in a power generation system using a diesel engine. The diesel engine exhaust system 800 purifies exhaust gas containing environmental pollutants such as nitrogen oxides (NO _x ) generated in a combustion chamber of a diesel engine, And discharges it to the outside. In the diesel engine exhaust system 800, a selective catalytic reduction (SCR) may be installed to reduce nitrogen oxides (NO _x ) and the like contained in the exhaust gas. The diesel engine exhaust system 800 may be implemented with an economizer including an evaporator for evaporating water using waste heat of hot exhaust gas discharged from a diesel engine, and a heater for heating the air.

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. The diesel fuel may be a marine gas oil (MGO), a marine diesel oil (MDO), a general heavy oil (HFO), a methanol, a dimethyl ether (DME), and a liquefied petroleum gas (LPG).

The fuel cell 210 includes an anode through which fuel containing hydrogen flows, a cathode through which air, which is an oxidant required for the fuel cell reaction, flows in, and a cathode formed from the anode and the cathode. And an electrolyte that acts as a transferring of the generated ions. The fuel cell 210 may be 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) And may be a fuel cell selected from batteries (DMFC).

The raw material treatment unit 410 includes an LNG evaporator for evaporating LNG (liquefied natural gas) supplied from a raw material supply unit 110 including an LNG storage tank and a pump, a first vaporizer 411 installed in the LNG vaporizer, A vaporizer 412 may be included. The first vaporizer 411 generates heat to the temperature of the water supplied from the water separator 421 and supplies the water supplied from the water separator 421 to the evaporator 840. The second vaporizer 412 generates heat to 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 And 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 the downstream 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 unit for bypassing water supplied from the water separator 421 to the first vaporizer 411 to the evaporator 840 is formed at a rear end of the water separator 421. The bypass section includes a first fluid pipe 75 connected to the first vaporizer 411 from the water separator 421 and a second fluid pipe 75 connected to the evaporator 840 from the first vaporizer 411. [ A bypass pipe 77 connecting the first fluid pipe 75 and the second fluid pipe 76 to each other and a bypass pipe 77 connecting the first fluid pipe 75 and the second fluid pipe 76, And a second opening / closing valve (B) installed in the second opening / closing valve.

For example, the control unit 250 of the fuel cell system according to the present invention may be configured to control the bypass unit according to a temperature sensing signal input from the temperature sensing unit 74. For example, when the temperature of the water supplied from the water separator 421 to the first vaporizer 411 is equal to or higher than a predetermined temperature, the control unit 250 closes the second on-off valve B, Water is supplied from the water separator 421 to the first vaporizer 411 by opening the first opening and closing valve A. [ The control unit 250 opens the second on-off valve B and closes the first on-off valve A so that the evaporator 840 ). The temperature sensing unit 74 is connected to the first on-off valve A and the second on-off valve A to supply the heat required by the LNG evaporator 410 in correspondence with the amount of fuel required in the fuel cell system 200. [ The second opening / closing valve B can be adjusted.

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

The reformer 430 is connected to the first vaporizer 411 installed in the LNG vaporizer and the natural gas NG vaporized by the second vaporizer 412 and the steam H supplied from the first heat exchanger 422 ₂ O) is subjected to a reforming reaction to produce a reformed gas, that is, 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 reformed gas generated in the reformer 430 includes carbon monoxide (CO) in addition to hydrogen (H ₂ ). The fuel cell system according to the present invention includes a water gasification reactor (WGS) for producing carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) by reacting carbon monoxide (CO) and steam (H ₂ O) contained in the reformed gas .

1 to 9, the hull 910 constitutes the overall appearance of the ship 900 according to the present invention. The hull 910 is provided with an engine for generating propulsive force for moving the hull 910 and a raw material supply unit for supplying the raw material to the engine. For example, the raw material is a material of a hydrocarbon series, LNG (liquefied natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), petrol, dimethyl ether, methane, Hydrogen purge off gas, pure hydrogen, and a liquid raw material having a relatively high molecular weight such as marine gas oil (MGO), marine diesel oil (MDO), and heavy oil (HFO).

The hull 910 is provided with a raw water storage tank for storing raw water and a raw water supply unit 120 for supplying the raw water from the raw water storage tank. The raw water may be, for example, fresh water or seawater. As another example, the raw water may be water in the state where impurities are removed from fresh water or seawater.

The hull 910 is provided with an air supply unit 130 for supplying air to the fuel cell system 200. Normally, air means a gas including nitrogen, oxygen, carbon dioxide and the like, but also includes the case where nitrogen or carbon dioxide or both gases are removed from the air. The air supply unit 130 may include an air storage tank and a device (for example, a blower) for supplying air from the air storage tank. As another example, the air supply unit 130 may be configured to supply the compressed high-pressure air after the external air is supplied, compress the high-pressure air, or to remove the foreign air and supply the compressed air at a normal pressure.

A DC-DC converter for boosting or reducing the output voltage from the fuel cell system 200 and a DC-AC inverter for converting a direct current (DC) to an alternating current (AC) A conversion unit is installed. The power conversion unit discharges electricity supplied from the fuel cell system 200 to a power load. The electric power load may be, for example, in-ship electrical equipment such as a ship's basic electrical equipment and cargo-system electrical equipment in the case of a ship. 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 a structure for navigating a watercraft, and includes not only a structure for navigating a watercraft, but also a floating oil production storage and unloading facility (FPSO) It includes the same sea structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined only by the appended claims.

100: Power generation system
110: raw material supply part 120: raw material water supply part
130: air supply unit 140: power conversion unit
200: Fuel cell system
411: First vaporizer 412: Second vaporizer
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:

Claims (9)

As a vessel,
A diesel engine exhaust system having an evaporator that evaporates water to waste heat of the exhaust gas discharged from the diesel engine to generate steam (H ₂ O);
A fuel cell system interlocked with the diesel engine exhaust system; And
And a power conversion unit for converting a direct current (DC) output from the fuel cell system into an alternating current (AC)
The fuel cell system includes:
A reformer for reforming gas supplied from an LNG evaporator for evaporating LNG and steam (H ₂ O) supplied from an evaporator of the diesel engine exhaust system to generate a reformed gas;
A combustor for heating the reformer;
A fuel cell that receives the reformed gas and generates electricity;
A water separator which receives steam (H ₂ O) from an evaporator of the diesel engine exhaust system to separate steam (H ₂ O) from liquid water and supplies steam (H ₂ O) to the reformer; And
And a first carburetor installed in the LNG evaporator for generating water heated by high temperature water supplied from the water separator and supplying water supplied from the water separator to an evaporator of the diesel engine exhaust system. The method according to claim 1,
Wherein the diesel engine exhaust system includes a heater for heating air using waste heat of exhaust gas discharged from a diesel engine as a heat source,
Wherein the heater supplies heated air to the cathode of the fuel cell. 3. The method of claim 2,
Wherein the diesel engine exhaust system includes a heater for heating air using waste heat of exhaust gas discharged from a diesel engine as a heat source,
Wherein the fuel cell system includes a first heat exchanger for exchanging heat between heated air supplied from a heater of the diesel engine exhaust system and steam (H2O) supplied from the water separator to the reformer. A fuel cell system interlocked with a diesel engine exhaust system,
A reformer for reforming gas supplied from an LNG evaporator for evaporating LNG and steam (H ₂ O) supplied from an evaporator of the diesel engine exhaust system to generate a reformed gas;
A combustor for heating the reformer;
A fuel cell that receives the reformed gas and generates electricity;
A water separator which receives steam (H ₂ O) from an evaporator of the diesel engine exhaust system to separate steam (H ₂ O) from liquid water and supplies steam (H ₂ O) to the reformer; And
And a first vaporizer installed in the LNG vaporizer and supplying water supplied from the water separator to the evaporator of the diesel engine exhaust system, the water being generated by the hot water supplied from the water separator. 5. The method of claim 4,
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. 6. The method of claim 5,
A temperature sensing unit for sensing a 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. 5. The method of claim 4,
And a second vaporizer installed in the LNG evaporator and generating heat as waste heat of the exhaust gas supplied from the combustor. 5. The method of claim 4,
Wherein the combustor is supplied with exhaust gas from an anode or a cathode of the fuel cell and is used for a combustion reaction. 5. The method of claim 4,
And an aqueous gasification reactor for reducing the concentration of carbon monoxide (CO) contained in the reformed gas supplied from the reformer.

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