KR102238761B1 - Ship - Google Patents

Abstract

The present invention is a fuel cell system for generating electricity using a raw material supply unit for supplying a raw material, a raw material water supply unit for supplying raw material water, a raw material supplied from the raw material supply unit, and the raw material water supplied from the raw material water supply unit, and It relates to a ship including a power conversion unit for converting a direct current (DC) output from the fuel cell system into an alternating current (AC).

Description

Ship{SHIP}

The present invention relates to an environmentally friendly ship.

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 power generation systems that convert fossil fuels or generate electricity through chemical reactions such as hydrogen and oxygen.

A fuel cell system is a system including a fuel cell that directly produces electric energy through a reaction with an oxidizing agent such as oxygen using a fuel, for example, hydrogen contained in a hydrocarbon-based material. Hydrocarbon-based materials include, for example, NG (natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), gasoline, dimethyl ether, and the like.

Depending on the type of electrolyte used, fuel cells include alkaline fuel cells (AFCs), phosphoric acid fuel cells (PAFCs), molten carbonate fuel cells (MCFCs), and solid oxides. It is classified into a fuel cell (SOFC, Solid Oxide Fuel Cell), a Polymer Electrolyte Membrane Fuel Cell (PEMFC), and a Direct Methanol Fuel Cell (DMFC). Each of these fuel cells operates according to fundamentally the same principle, but their operating temperature, electrolyte, power generation efficiency, and power generation performance are different from each other. The fuel cell may generate electricity by receiving fuel containing hydrogen from a reformer that reforms fuel and steam (H _{2 0).} The reformer receives raw materials such as NG (natural gas) and steam (H ₂ 0) from a steam separator that separates moisture from steam (H ₂ 0) and is heated by a combustor _{to reform fuel and steam (H 2} 0). You can react.

Meanwhile, in the fuel cell system according to the prior art, in order to supply raw materials to the reformer, LNG is vaporized through a separate vaporizer and supplied to the fuel cell. Therefore, in the fuel cell system according to the prior art, heat is supplied from the outside to vaporize LNG by installing a separate heating device. Accordingly, the fuel cell system according to the prior art has the following problems.

First, the fuel cell system according to the prior art must supply fuel or electricity to a heating device that vaporizes LNG. Accordingly, the fuel cell system according to the prior art needs to supply fuel or electricity to the heating device in order to supply heat for generating fuel supplied to the fuel cell, and thus, there is a problem in that electricity production efficiency is lowered.

Second, in the fuel cell system according to the prior art, since a separate heating device must be installed to vaporize LNG, the installation cost of the heating device increases. Accordingly, the fuel cell system according to the prior art has a problem that the construction cost for generating electricity increases.

Third, the fuel cell system according to the prior art requires a space for installing a heating device for vaporizing LNG. Accordingly, the fuel cell system according to the prior art has a problem in that the space of other devices for generating and storing electricity becomes narrow due to the installation of a heating device.

The present invention has been conceived to solve the above-described problems, and is to provide a ship that can reduce construction cost and increase space utilization for an installation space.

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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 raw material supply unit for supplying raw materials; A raw material water supply unit for supplying raw material water; A fuel cell system for generating electricity by using the raw material supplied from the raw material supply unit and the raw material water supplied from the raw material water supply unit; 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 comprises: a hydrogen generator configured to generate fuel including hydrogen; A fuel cell for generating electricity using fuel supplied from the hydrogen generating unit; _{And a heat exchange unit for phase-changing water (H 2} 0) in a liquid or gaseous state into steam (H ₂ 0), wherein the hydrogen generating unit is steam (H ₂ 0) to pretreat LNG supplied from the raw material supply unit. A raw material processing unit including an LNG evaporator for evaporating LNG by using a raw material treatment unit, a raw material water treatment unit pre-treating the raw material water supplied from the raw material water supply unit, and the pretreated fuel supplied from the raw material processing unit and the steam supplied from the raw material water treatment unit And a reformer for reforming (H ₂ 0), and the heat exchange part converts exhaust gas discharged from a combustor to combust exhaust gas of the fuel cell and water (H ₂ 0) in a liquid or gaseous state passing through the LNG evaporator. a rough liquid or water (H ₂ 0) as the gas phase to the LNG evaporator by heat exchange the steam and the change in (H ₂ 0), steam (H ₂ 0) discharged from the heat exchanger is re-heated feed to the LNG evaporator And can be cycled.
In the ship according to the present invention, the raw material water treatment unit is supplied from the steam _{separator using the exhaust gas discharged from the steam (H 2} 0) to separate water from the gas engine and the gas engine generating the propulsion force as a heat source. And an economizer that heats the steam (H ₂ 0), and the gas engine may generate a driving force with fuel containing hydrogen generated in the LNG evaporator.
A ship according to the present invention includes a condenser for condensing exhaust gas of the combustor discharged from the heat exchange unit; A first pipe connecting the LNG evaporator and the heat exchanger; And a first supply unit supplying the water condensed in the condenser to the first pipe.
A ship according to the present invention includes a condenser for condensing exhaust gas of the combustor discharged from the heat exchange unit; A second pipe connecting the heat exchange unit and the water separator; And a second supply unit supplying the water condensed in the condenser to the second pipe.

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

The present invention is implemented to vaporize LNG in an LNG evaporator using waste heat from exhaust gas discharged from a combustor and heat the discharged water (liquid or gaseous H ₂ 0), which is supplied to the steam separator without a separate heating device. By increasing the amount of steam (H ₂ 0), electricity production and electricity production efficiency can be improved.

_{The present invention is implemented to vaporize and discharge LNG using steam (H 2} 0) generated using waste heat of exhaust gas discharged from a gas engine, thereby providing a heating device using separate fuel or electricity for vaporizing LNG. Since it is not required, not only can the construction cost consumed to produce electricity can be reduced, but also the versatility for the installation space can be increased.

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 and 7 are configuration diagrams of the fuel cell system of FIG. 5 according to a first embodiment;
8 is a configuration diagram according to a second embodiment of the fuel cell system of FIG. 5
9 is a schematic diagram showing an example of a ship according to the present invention

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

1 is a conceptual configuration diagram of an overall system according to the present invention, FIG. 2 is a conceptual configuration diagram of a fuel cell system according to a first embodiment of the present invention, and FIGS. 3A and 3B are diagrams of a fuel cell used in the present invention. As an exemplary diagram for explaining the operation, FIG. 3A is a conceptual configuration diagram of a solid oxide fuel cell (SOFC), FIG. 3B is a conceptual configuration diagram of a polymer electrolyte fuel cell (PEMFC), and FIG. 4 is an embodiment of the present invention. It is an exemplary diagram for explaining the hydrogen generation unit according to.

Referring to FIG. 1, the fuel cell system 200 according to the present invention is applied to the power generation system 100 and serves 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 from 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, and the like.

For example, when the power generation system 100 is applied to a vehicle, the raw material supply unit 110 is implemented to include a gas storage tank and a device (eg, a pump) for supplying gas from the gas storage tank. As another example, when the power generation system 100 is applied to an LNG carrier, the raw material supply unit 110 includes an LNG storage tank and a device for providing boil-off gas generated 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 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 from the raw material water storage tank. The raw material water may be, for example, fresh water, or sea water. As another example, the raw material water may be water that has been treated to remove impurities or ion-removed 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, all gases other than oxygen such as nitrogen, carbon dioxide, or two 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 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 direct current (DC) into an alternating 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. In the case of a ship, for example, the power load may be an electrical facility in a ship such as basic electrical facilities of a ship and electrical facilities 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 _{generates electricity using fuel, water (H 2} O), and air. 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 200 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 for controlling the operation of all components including the fuel cell 210 and the hydrogen generator 400. In the present specification, raw materials and raw water flowing into the hydrogen generating unit 400 are defined as fuel, and what is generated in the hydrogen generating unit 400 and flowing into the fuel cell 210 is defined as 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 is a temperature sensor and a temperature maintenance device. That is, a heater, a cathode fan, an anode fan, and a cooling plate may be included. The temperature sensor senses the temperature of the fuel cell stack, the temperature of the cathode, 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 to 1000°C, and in the case of a polymer electrolyte fuel cell (PEMFC), the operating temperature is maintained at 30 to 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. A fuel electrode (anode) (313) In there is fuel is introduced, through the electrolyte 312. The oxygen ions move to the fuel electrode (anode) (313) containing hydrogen (H ₂₎ (O ^{2 -)} and hydrogen (H ₂₎ reacts electrochemically with water (H ₂ 0) and the electron (e ^-) is generated. 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} ) that 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 0). In addition, unreacted oxygen and nitrogen are discharged from the cathode 311 of the solid oxide fuel cell (SOFC) 310.

Referring to Figure 3b a polymer electrolyte fuel cell (PEMFC), (320) is a fuel electrode (anode) (321), the catalyst layer 322, the hydrogen (H ₂₎ is a hydrogen ion (H ⁺⁾ and electrons (e ^-) in the formed in the generation by do. Hydrogen ions (H ⁺ ) move to the cathode 324 through the polymer membrane 323. In the polymer electrolyte fuel cell (PEMFC) 320, hydrogen ions (H ⁺ ) and oxygen (O ₂ ) react in the catalyst layer 325 formed on the cathode 324 to produce water (H ₂ 0). 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} 0) from the cathode 324.

Other molten carbonate fuel cell (MCFC) is a fuel electrode (anode) of hydrogen (H ₂₎ and carbonate ions (CO ₃ ^{2 -)} in the reaction water (H ₂ O) and carbon dioxide (CO _2), electron (e ^-) 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 (C0 3} ^{-2 ).} Carbonate ions (C0 ₃ ^-2 ) move to the anode through the electrolyte. In the molten carbonate fuel cell (MCFC), carbon dioxide (CO ₂ ) generated in the process of generating electricity may be circulated inside the fuel cell without discharging to the outside.

Referring to FIGS. 2 and 4, the hydrogen generating 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 the present specification, raw materials and raw water flowing into the hydrogen generating unit 400 are defined as fuel, and what is generated in the hydrogen generating unit 400 and flowing into the fuel cell 210 is defined as fuel.

The hydrogen generation unit 400 may be designed in various ways according to 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 generation unit 400 may be implemented including a reformer and a combustor. . As another example, when the fuel cell 210 is a phosphoric acid fuel cell (PAFC) or a polymer electrolyte fuel cell (PEMFC), the hydrogen generating unit 400 is a water gas shift reactor in addition to a reformer and a combustor. , WGS) may be further included and implemented.

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 ).} .

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

The hydrogen generation unit 400 may be implemented by including 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 preprocesses raw materials supplied from a raw material supply unit including a raw material storage tank. For example, the raw material processing unit 410 may be implemented by including an LNG evaporator that evaporates the liquefied natural gas supplied from the LNG storage tank. 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., the raw material processing unit ( 410) includes a heater that applies heat to offshore gas oil (MGO), offshore diesel oil (MDO), or general heavy oil (HFO) and a methanizer that generates _{methane (CH 4) by catalytic reaction of the heated raw material.} Can be implemented. 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 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 for heating the raw material water with waste heat of the exhaust gas generated from the combustor 440. In addition, the raw material water treatment unit 420 may include 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 fuel supplied from the raw material treatment unit 410 and the steam (H ₂ 0) 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 430 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 a fuel.

The reformer 430 is implemented including a reforming catalyst layer that triggers a reforming reaction. The reforming catalyst layer has a structure in which the reforming catalyst is loaded 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 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 by 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 fuel. 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 generation 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 fuel and steam (H 2} O) pretreated in the raw material processing unit 410 The range changes. When the fuel cell system 200 according to an embodiment of 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 combustor 440. ) To control the temperature of the reformer 430 by increasing or decreasing the amount of raw material combustion. 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 produces carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) _{by reacting carbon monoxide (CO) and steam (H 2 0).} 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) varies depending on the type of catalyst used, and the composition of the discharged gas is determined by the 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, 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 discharged from the low-temperature water gasification reactor (LTS). It may include a methanation reactor for reducing 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 an embodiment of the present invention includes the control unit 250 (shown in FIG. 2), the control unit 250 controls the cooler using a signal output from a temperature sensor. Controls the temperature of the selective oxidation reactor (PROX). 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 to be 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), and the shape of the carrier supporting the catalyst may be, for example, granular, pellet, honeycomb, and the like, and the material constituting the carrier 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, and FIGS. 6 and 7 are configuration diagrams of the fuel cell system of FIG. 5 according to the first embodiment. Here, the same configuration as in FIGS. 1 to 4 uses the same reference numerals.

5 to 7, the fuel cell system 200 according to the second embodiment of the present invention includes a fuel cell 210, a hydrogen generation unit 400, and a heat exchange unit 500. The gas engine 800 is installed to be connected to the hydrogen generating unit 400. The fuel cell system 200 according to the present invention includes a control unit 250 for controlling the operation of all components including the fuel cell 210, the hydrogen generation unit 400, and the heat exchange unit 500. It can also be implemented.

5 to 7, the fuel cell 210 may receive fuel containing hydrogen from the hydrogen generator 400 and generate electricity through an electrochemical reaction. The fuel cell 210 may be composed of one or a plurality of fuel cell modules. For example, the fuel cell 210 includes an alkali 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 a direct It may include at least one fuel cell among methanol fuel cells (DMFC). The fuel cell 210 may supply exhaust gas generated through the electrochemical reaction to the hydrogen generator 400. For example, the fuel cell 210 may supply high-temperature exhaust gas to the combustor 440 of the hydrogen generating unit 400.

5 to 7, 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 hydrogen generation unit 400 receives LNG from the raw material supply unit 110 and receives water from the raw material water supply unit 120 to generate fuel containing hydrogen required for the fuel cell 210. Although not shown, the hydrogen generator 400 may include a water gasification reactor 450 to lower the CO concentration of the fuel supplied from the reformer 430 to the fuel cell 210.

Looking specifically at this, the raw material processing unit 410 uses steam (H ₂ 0) to evaporate LNG in order to pre-treat the LNG supplied from the raw material supply unit 110, and the LNG evaporator 4101, and the steam (H ₂ 0) may include a vaporizer 4102 that generates heat as a heat source.

The raw material water treatment unit 420 includes a water separator 4201 and an economizer 4203.

The water separator 4201 separates moisture from _{steam (H 2 0).} For example, the water separator 4201 may circulate water supplied from the raw material water supply unit 120 to the economizer 4203 to receive phase-changed steam (H ₂ 0) to separate moisture. The water separator 4201 may separate moisture using a centrifuge, a metal mesh, a baffle plate, or the like. The water separated by the water separator 4201 may be discharged to the outside or may be supplied to the raw material water supply unit 120 and stored. _{Steam (H 2} 0) discharged from the water separator 4201 is supplied to the economizer 4203 and circulated through a pump (not shown), or the vaporizer of the reformer 430 and the LNG evaporator 4101 ( 4102). Although not shown, a by-pass line may be installed in the recovery pipe circulating from the economizer 4203 to the water separator 4201 to use steam (H ₂ 0) for other purposes.

_{The economizer 4203 heats the steam (H 2} 0) supplied from the water separator 4201. _{Here, the economizer 4203 may heat steam (H 2} 0) supplied from the water separator 4201 using the exhaust gas discharged from the gas engine 800 as a heat source. The gas engine 800 is installed to be connected to the LNG evaporator 4101 and receives fuel including hydrogen generated by the LNG evaporator 4101 to generate a driving force. In this case, the fuel containing hydrogen may be NG (natural gas) in which LNG is vaporized. Although not shown, the economizer 4203 is installed between the exhaust pipe of the gas engine 800 and the exhaust outlet. The economizer 4203 includes an inlet pipe, a high pressure evaporator, an intermediate pipe, a low pressure evaporator, and an outlet pipe. The inlet pipe is connected to the exhaust pipe of the gas engine 800 to guide the exhaust gas discharged from the gas engine 800 to the high pressure evaporator. The intermediate pipe guides the exhaust gas after heat exchange in the high pressure evaporator to the low pressure evaporator. The outlet pipe guides the exhaust gas after heat exchange in the low pressure evaporator to the exhaust outlet. _{Steam (H 2} 0) supplied from the water separator 4201 is heat-exchanged with the high-temperature exhaust gas discharged from the gas engine 800 while passing through the high pressure evaporator and the low pressure evaporator. _{Steam (H 2} 0) heat-exchanged by the economizer 4203 is supplied to the LNG evaporator 4101 and used as a heat source for vaporizing the LNG. _{The steam (H 2} 0) heat-exchanged by the economizer 4203 may be supplied to the reformer 430 to undergo a reforming reaction with NG (natural gas) supplied from the LNG evaporator 4101.

5 to 7, the heat exchange part 500 is installed between the LNG evaporator 4101 and the water separator 4201. The heat exchange unit 500 heat-exchanges the exhaust gas discharged from the combustor 440 and water (liquid or gaseous H ₂ O) that has passed through the LNG evaporator 4101. For example, the heat exchange unit 500 is a pipe through which water (liquid or gaseous H ₂ O) flows from the LNG evaporator 4101 to the water separator 4201, and exhaust gas discharged from the combustor 440 Heat exchange can be performed by bringing the conduit through which it flows closer. In this case, the waste heat of the exhaust gas discharged from the combustor 440 becomes a heat source for heating _{water (liquid or gaseous H 2 O) that has passed through the LNG evaporator 4101.} Accordingly, the heat exchange unit 500 may phase-change _{water (liquid or gaseous H 2} O) cooled through the LNG evaporator 4101 into steam (H _{2 O). Steam (H 2} O) heated and discharged from the heat exchange unit 500 is supplied to the water separator 4201. The exhaust gas of the combustor 440 discharged from the heat exchange unit 500 may be cooled by the heat exchange unit 500 and then discharged to the outside, or may be supplied to a condenser to condense moisture. _{Accordingly, the water separator 4201 may receive more steam (H 2} O) than when the heat exchange part 500 is not present.

5 to 7, the steam separator 4201 may supply steam (H ₂ O) supplied from the heat exchange unit 500 to the economizer 4203. The economizer 4203 may supply steam (H ₂ O) supplied from the water separator 4201 to the LNG evaporator 4201. The LNG evaporator 4201 may _{evaporate LNG using steam (H 2} O) and then supply it to the heat exchange unit 500. That is, the water (liquid or gaseous H ₂ O) may be circulated between the LNG evaporator 4101 and the heat exchange unit 500. _{Accordingly, the steam (H 2} O) discharged from the heat exchange unit 500 may be supplied to the LNG evaporator 4201 again to be used as a heat source for vaporizing LNG.

Accordingly, the first embodiment of the fuel cell system 200 of the present invention can achieve the following operational effects.

First, the first embodiment of the fuel cell system 200 of the present invention is _{a circulation structure in which LNG is vaporized and discharged water (liquid or gaseous H 2} 0) is reheated to be used as a heat source to vaporize LNG again. By implementing it, it is possible to prevent wasted resources by minimizing the amount of water supplied to generate electricity.

Second, the first embodiment of the fuel cell system 200 of the present invention vaporizes LNG using the waste heat of the exhaust gas discharged from the combustor 440 and is cooled to discharge water (liquid or gaseous H _{2 ). Since it is implemented to produce steam (H 2} 0) by heating 0), there is no need for a separate heating device using fuel or electricity. Accordingly, in the first embodiment of the fuel cell system 200 of the present invention, since the fuel or electricity supplied to the heating device can be reduced, the amount of electricity produced and the efficiency of electricity production can be improved.

Third, in the first embodiment of the fuel cell system 200 of the present invention, since there is no need for a separate heating device for _{vaporizing LNG and heating the discharged water (liquid or gaseous H 2 0), electricity is produced.} In addition, it is possible to reduce the construction cost that is consumed in order to increase the versatility of the installation space.

Fourth, the first embodiment of the fuel cell system 200 of the present invention is water (liquid or gaseous state) for vaporizing LNG by using waste heat of exhaust gas discharged from the gas engine 800 without a separate heating device. By _{being implemented to heat H 2} 0), it is possible to supply a heat source required from the LNG evaporator 4101 for LNG vaporization, thereby reducing the electricity production construction cost and operation cost of the power generation system 100.

Fifth, the first embodiment of the fuel cell system 200 of the present invention is implemented so that the high-temperature exhaust gas discharged from the gas engine 800 is cooled by the economizer 4203, so that the exhaust gas discharged to the outside is It can contribute to preventing global warming by lowering the temperature.

Referring to FIG. 7, a first embodiment of the fuel cell system 200 of the present invention may include a condenser 4202 and a first supply unit 600.

The condenser 4202 condenses the exhaust gas of the combustor 440 discharged from the heat exchange unit 500. To this end, the condenser 4202 is installed to be connected to the heat exchange unit 500. For example, the condenser 4202 may be installed to be connected to the heat exchange unit 500 through a pipe or a pipe such as a pipe. Accordingly, the condenser 4202 may receive and condense the exhaust gas of the combustor 440 discharged from the heat exchange unit 500. The condenser 4202 cools and condenses _{steam (H 2} O) contained in the exhaust gas. The condenser 4202 may cool and condense _{steam (H 2} 0) by a method such as water cooling, air cooling, evaporation, or the like. Steam (H ₂ 0) becomes water when condensed. Water condensed while passing through the condenser 4202 may be supplied to the front end of the heat exchange unit 500. Residual gas other than water condensed in the condenser 4202 may be discharged to the outside.

The first supply unit 600 supplies water condensed in the condenser 4202 to the front end of the heat exchange unit 500. For example, the first supply unit 600 may include a first conduit 401 connecting the LNG evaporator 4101 and the heat exchange unit 500 and a conduit or a pipe connecting the condenser 4202, and the It is installed in the pipeline and may include a pump, an impeller, etc. for moving water. Accordingly, the first supply unit 600 may supply water discharged from the condenser 4202 to the first pipe line 401 that is a front end of the heat exchange unit 500. Although not shown, the first supply unit 600 may be installed to be connected to the controller 250 and operated under the control of the controller 250. The control unit 250 controls the first supply unit 600 when _{the amount of steam (H 2} 0) generated is small compared to the amount of water supplied through flow sensors (not shown) installed at the front and rear ends of the heat exchange unit 500 Thus, the amount of water supplied to the front end of the heat exchange unit 500 may be reduced or blocked. In addition, when the amount of water or steam (H ₂ 0) in the water separator 4201 is insufficient, the control unit 250 is configured to supply water to the first pipe 401 from the water tank 120, which is a raw material water supply unit. Can be controlled through.

Accordingly, in the first embodiment of the fuel cell system 200 of the present invention, since the amount of water supplied to the heat exchange unit 500 can be increased, the steam supplied to the water separator 4201 (H ₂ 0 You can increase the amount of ). Accordingly, the first embodiment of the fuel cell system 200 of the present invention _{increases the amount of steam (H 2} 0) supplied from the water separator 4201 to the LNG evaporator 4101 to increase the vaporization rate of LNG. Can be improved. In addition, the first embodiment of the fuel cell system 200 of the present invention _{increases the amount of steam (H 2} 0) supplied to the reformer 430 from the water separator 4201 to increase the amount of the reformer 430. It is also possible to increase the amount of hydrogen produced by the reforming reaction.

Referring to FIG. 8, the second embodiment of the fuel cell system 200 of the present invention may further include a second supply unit 700.

The second supply unit 700 supplies water condensed in the condenser 4202 to a rear end of the heat exchange unit 500. For example, the second supply unit 700 includes a second conduit 402 connecting the heat exchange unit 500 and the water separator 4201 and a condenser 4202, and a conduit installed in the conduit and water It may include a pump, impeller, etc. for moving the. Accordingly, the second supply unit 700 may supply water discharged from the condenser 4202 to the second conduit 402 that is a rear end of the heat exchange unit 500. Although not shown, the second supply unit 700 may be installed to be connected to the controller 250 and operated under the control of the controller 250. The controller 250 is the volume over steam (H ₂ 0) amount of water (liquid or H ₂ 0 as a gaseous phase) to be supplied through the flow rate sensor (not shown) installed at the front end and rear end of the separator 4201 If the number is small, the second supply unit 700 may be controlled to reduce or block the amount of water supplied to the rear end of the heat exchange unit 500.

Accordingly, in the second embodiment of the fuel cell system 200 of the present invention, since the amount of water can be increased than the _{steam (H 2 0) supplied to the water separator 4201, the water} Similar to the case of supplying water from the tank 120 to the first pipe 401, _{the amount of steam (H 2} 0) and water can be appropriately adjusted by properly maintaining the temperature in the water separator 4201. Accordingly, in the second embodiment of the fuel cell system 200 of the present invention, the vaporization rate of LNG can be controlled by adjusting the amount of _{steam (H 2 0) supplied to the LNG evaporator 4101.} In addition, in the second embodiment of the fuel cell system 200 of the present invention, the reforming reaction rate of the reformer 430 may be controlled by adjusting the amount of _{steam (H 2 0) supplied to the reformer 430.} .

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

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

1 to 9, 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 and a gas engine 800. The fuel cell system 200 includes a fuel cell 210, a hydrogen generation unit 400, a heat exchange unit 500, a first supply unit 600 and a second supply unit 700. The gas engine 800 is installed to be connected to the hydrogen generating unit 400. The fuel cell system 200 includes all of the fuel cells 210, the hydrogen generation unit 400, the heat exchange unit 500, the first supply unit 600, and the second supply unit 700, etc. It may be implemented by including the control unit 250 that controls the operation of the configuration.

The fuel cell 210 includes an alkali 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 a direct methanol fuel. It may be implemented by including at least one fuel cell among the cells DMFC.

The hydrogen generation unit 400 may be implemented by including a raw material processing unit 410, a raw material water treatment unit 420, a reformer 430, and a combustor 440. The hydrogen generation unit 400 receives LNG from the raw material supply unit 110 and receives steam (H ₂ 0) from the raw material water supply unit 120 to provide fuel containing hydrogen required for the fuel cell 210. Create At this time, the hydrogen generation unit 400 heats the _{steam (H 2} 0) supplied to the LNG evaporator 4101 and the reformer 430 using waste heat of the exhaust gas discharged from the gas engine 800 can do. Further, the hydrogen generator 400 includes a steam using waste heat of exhaust gas discharged from the waste heat, for example, the combustor 440 is generated in the process of generating the hydrogen supplied to the steam separator (4201) (H ₂ 0 You can increase the amount of ).

The heat exchange unit 500 heat-exchanges water (liquid or gaseous H ₂ O) passing through the LNG evaporator 4101 and exhaust gas discharged from the combustor 440. _{Accordingly, water (liquid or gaseous H 2} O) supplied from the LNG evaporator 4101 to the water separator 4201 is heated in the heat exchange unit 500 to be phase-changed _{to steam (H 2 0).} I can. Accordingly, the heat exchange unit 500 may increase the amount of _{steam (H 2} 0) supplied from the LNG evaporator 4101 to the water separator 4201.

The first supply unit 600 is a first pipe 401 connecting the water condensed in the condenser 4202 to the LNG evaporator 4101 and the heat exchange unit 500, that is, a front end of the heat exchange unit 500 To supply. Accordingly, the first supply unit 600 may increase the amount of _{water (liquid or gaseous H 2 O) flowing into the heat exchange unit 500.}

The second supply unit 700 is a second conduit 402 connecting the water condensed in the condenser 4202 to the heat exchange unit 500 and the water separator 4201, that is, the rear end of the heat exchange unit 500 To supply. Accordingly, the second supply unit 700 may increase the amount of water supplied to the water separator 4201.

Therefore, the ship 900 according to the present invention can achieve the following operational effects.

First, the vessel 900 according to the present invention uses the high-temperature exhaust gas discharged from the gas engine 800 without a separate heating device to generate steam (H ₂ 0) for vaporizing the LNG. Steam (H ₂ 0) supplied from 4201 may be heated. Accordingly, since the ship 900 according to the present invention can use the fuel supplied to the heating device to generate electricity, it is possible to increase the amount of electricity produced.

Second, the ship 900 according to the present invention _{heats the water (liquid or gaseous H 2} O) discharged from the LNG evaporator 4101 with waste heat of the exhaust gas discharged from the combustor 440 to heat the water separator. The amount of steam (H ₂ 0) supplied to 4201 may be increased. Accordingly, the ship 900 according to the present invention may increase the vaporization rate of LNG by increasing the amount of _{steam (H 2} 0) supplied from the water separator 4201 to the LNG evaporator 4101. Accordingly, since the ship 900 according to the present invention can quickly supply fuel containing hydrogen to the fuel cell 210, it is possible to quickly respond to the amount of electricity required by the ship's power load.

Third, the vessel 900 according to the present invention generates water by condensing the exhaust gas of the combustor 440 discharged from the heat exchange unit 500, and then at least one of the front end and the rear end of the heat exchange unit 500 Water can be supplied. Accordingly, the ship 900 according to the present invention _{can increase the amount of steam (H 2} 0) supplied to the LNG evaporator 4101, thereby improving electricity production efficiency. In addition, the ship 900 according to the present invention can reduce the temperature of the exhaust gas of the combustor 440 discharged to the outside by installing the condenser 4202, thus contributing to increasing the efficiency of the power generation system 100. have.

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 propulsion for moving the hull 910 and a raw material supply unit 110 supplying raw materials to the engine. For example, raw materials are hydrocarbon-based materials, such as NG (natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), gasoline, dimethyl ether, methane gas, hydrogen. Liquid raw materials with relatively high molecular weight, such as refined off-gas, pure hydrogen, and marine gas oil (MGO), marine diesel oil (MDO), heavy fuel oil (HFO), etc. I can.

The hull 910 is provided with 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. The raw material water may be, for example, 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 seawater.

An air supply unit 130 for supplying air to the fuel cell system 200 is installed in the hull 910. In general, air refers to a gas including nitrogen, oxygen, carbon dioxide, and the like, but in the present specification, all gases other than oxygen such as nitrogen, carbon dioxide, or two 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 the 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 a DC current (DC) into an AC current (AC). The conversion unit 140 is installed. The power conversion unit 140 discharges electricity supplied from the fuel cell system 200 to a power load. In the case of a ship, for example, the power load may be an electrical facility in a ship such as basic electrical facilities of a ship and electrical facilities of a cargo system. Although not shown, the power conversion unit 140 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 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 pertains 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
210: fuel cell 250: control unit
400: hydrogen generation unit 500: heat exchange unit
600: first supply unit 700: second supply unit
800: gas engine

Claims (5)

As a ship,
A raw material supply unit for supplying raw materials;
A raw material water supply unit for supplying raw material water;
A fuel cell system for generating electricity by using the raw material supplied from the raw material supply unit and the raw material water supplied from the raw material water supply unit; 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 hydrogen generator for generating fuel containing hydrogen;
A fuel cell for generating electricity using fuel supplied from the hydrogen generating unit; And
It includes a heat exchange unit for phase change _{of water (H 2} 0) in a liquid or gaseous state into steam (H _{2 0),
The hydrogen generation unit includes a raw material processing unit including an LNG evaporator for evaporating LNG using steam (H 2} 0) to pretreat the LNG supplied from the raw material supply unit, and raw material water for pretreating the raw material water supplied from the raw material water supply unit. A processing unit, and a reformer for reforming the pretreated fuel supplied from the raw material processing unit and the steam (H _{2 0) supplied from the raw material water processing unit,}
The heat exchange unit heat-exchanges the exhaust gas discharged from the combustor that burns the exhaust gas of the fuel cell and water (H ₂ 0) in a liquid or gaseous state that has passed through the LNG evaporator, so that water in a liquid or gaseous state through the LNG evaporator ( H ₂ 0) phase change to steam (H ₂ 0),
_{Steam (H 2} 0) discharged from the heat exchange unit is reheated and supplied to the LNG evaporator to be circulated,
The raw material water treatment unit uses a steam separator for separating moisture from the steam H20, and an economizer for heating the steam H20 supplied from the steam separator using the exhaust gas discharged from the gas engine generating propulsion as a heat source. Including,
A condenser for condensing exhaust gas of the combustor discharged from the heat exchange unit;
A second pipe connecting the heat exchange unit and the water separator; And
A ship, characterized in that it further comprises a second supply unit for supplying the water condensed in the condenser to the second pipe. A hydrogen generator for generating fuel containing hydrogen;
A fuel cell for generating electricity using fuel supplied from the hydrogen generating unit; And
It includes a heat exchange unit for phase change _{of water (H 2} 0) in a liquid or gaseous state into steam (H _{2 0),
The hydrogen generation unit includes a raw material processing unit including an LNG evaporator for evaporating LNG using steam (H 2} 0) to pretreat the LNG supplied from the raw material supply unit, a raw material water treatment unit for pretreating the raw material water supplied from the raw material water supply unit, And a reformer for reforming the pretreated fuel supplied from the raw material processing unit and the steam (H _{2 0) supplied from the raw material water processing unit,}
The heat exchange unit heat-exchanges the exhaust gas discharged from the combustor that burns the exhaust gas of the fuel cell and water (H ₂ 0) in a liquid or gaseous state that has passed through the LNG evaporator, so that water in a liquid or gaseous state through the LNG evaporator ( H ₂ 0) phase change to steam (H ₂ 0),
_{Steam (H 2} 0) discharged from the heat exchange unit is reheated and supplied to the LNG evaporator to be circulated,
The raw material water treatment unit uses a steam separator for separating moisture from the steam H20, and an economizer for heating the steam H20 supplied from the steam separator using the exhaust gas discharged from the gas engine generating propulsion as a heat source. Including,
A condenser for condensing exhaust gas of the combustor discharged from the heat exchange unit;
A second pipe connecting the heat exchange unit and the water separator; And
And a second supply unit supplying the water condensed in the condenser to the second pipe. delete The method of claim 2,
A condenser for condensing exhaust gas of the combustor discharged from the heat exchange unit;
A first pipe connecting the LNG evaporator and the heat exchanger; And
And a first supply unit supplying the water condensed in the condenser to the first pipe line. delete

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