KR20170076927A - Ship - Google Patents

Abstract

The present invention relates to a liquefied natural gas (LNG) feedstock comprising a raw material supply portion for supplying LNG (liquefied natural gas), a raw water supply portion for supplying raw water, LNG (liquefied natural gas) supplied from the raw material supply portion and raw water supplied from the raw water supply portion And a power converter 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 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. The fuel cell can generate electricity by receiving fuel containing hydrogen from a reformer that reforms fuel and steam (H ₂ O). The reformer can generate hydrogen by reforming the raw material supplied from the raw material supply unit and steam (H ₂ 0) supplied from the raw material water supply unit. The combustor heats the reformer with waste heat of the exhaust gas generated as the exhaust gas discharged from the fuel cell is burned as a heat source.

In recent years, the industry has used a gas turbine that generates electricity using a fuel cell system that is an environmentally friendly power generation system, LNG (liquefied natural gas), and a steam turbine that produces electricity using steam (H ₂ O) To develop the necessary power and to cope with global environmental pollution regulations.

However, in the case of the prior art in which the fuel cell system and the gas turbine and the steam turbine are applied in combination, the following problems arise.

Firstly, in order to supply fuel containing hydrogen to the fuel cell and the gas turbine, LNG (liquefied natural gas) is heated by installing a separate heating device. Accordingly, since the fuel used in the fuel cell is conventionally supplied to the heating device, the amount of electricity produced by the fuel cell and the gas turbine is reduced, the electricity production efficiency is lowered, and the cost for operating the power generation system is increased have.

Secondly, in order to heat LNG (liquefied natural gas) to be supplied to the fuel cell and the gas turbine, a separate heating device must be installed. Accordingly, conventionally, there is a problem that the construction cost for producing electricity is increased.

Thirdly, a heating device installation space for heating LNG (liquefied natural gas) for supplying fuel cells and gas turbines is required in the related art. Therefore, conventionally, there is a problem that the space of other devices for producing and storing electricity becomes narrow due to the installation of the heating device.

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 improving the electricity production amount and the electricity production efficiency.

The present invention is to provide a ship capable of reducing the construction cost for producing electricity.

The present invention is to provide a ship capable of increasing the versatility of the installation space.

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

A ship according to the present invention comprises: a raw material supply part for supplying LNG (liquefied natural gas); A raw water supply part for supplying raw water; And a fuel cell system for producing electricity using LNG (liquefied natural gas) supplied from the raw material supply unit and raw water supplied from the raw water supply unit; 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 an LNG the cost of evaporation can be a raw material for pre-processing the raw water supplied from the raw material processing, the raw material can supply comprising a LNG evaporator processing unit, supplied from the raw material processing section for pre-processing and fuel supplied from the raw water processing steam (H ₂ 0 ), And a combustor for heating the reformer; A fuel cell that generates electricity based on fuel containing hydrogen supplied from the hydrogen generating unit; A turbine section including a gas turbine for generating electricity from fuel supplied from the LNG evaporator; And a first heat exchanger for exchanging heat between the exhaust gas discharged from the gas turbine and water supplied from the raw water treatment unit.

In the vessel according to the present invention, the LNG evaporator may vaporize LNG (liquefied natural gas) using at least one of the exhaust gas discharged from the combustor and the exhaust gas discharged from the first heat exchanger.

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

The present invention is implemented to vaporize LNG (liquefied natural gas) using at least one of waste heat of exhaust gas discharged from a combustor and waste heat of exhaust gas discharged from a gas turbine, It is possible to improve the electric production amount and the electric production efficiency.

Since the present invention is implemented to vaporize LNG (liquefied natural gas) using at least one of waste heat of exhaust gas discharged from a combustor and waste heat of exhaust gas discharged from a gas turbine, a separate heating device can be omitted, It is possible not only to reduce the construction cost consumed in producing the air conditioner, but also to increase the versatility of the installation space.

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 to 7 are conceptual diagrams of a fuel cell system according to a second embodiment of the present invention
Fig. 8 is a schematic diagram of the fuel cell system of Fig. 5 according to the first embodiment
Fig. 9 is a schematic view of the fuel cell system of Fig. 5 according to the second embodiment
Fig. 10 is a schematic view of the fuel cell system of Fig. 5 according to the third embodiment
Fig. 11 is a schematic view of the fuel cell system of Fig. 5 according to the fourth embodiment
12 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.

FIG. 2 is a conceptual diagram of a fuel cell system according to a first embodiment of the present invention. FIGS. 3A and 3B are views showing the structure of a fuel cell used in the present invention. Fig. 3 is a conceptual diagram of a solid oxide fuel cell (SOFC), Fig. 3 (b) is a conceptual diagram of a polymer electrolyte fuel cell (PEMFC) FIG. 2 is a diagram illustrating an example of a hydrogen generating portion according to the present invention.

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 the raw material from 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 gas storage tank and a device (for example, 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 material supply unit 110 is implemented including an LNG storage tank and an apparatus for providing evaporative gas generated in 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 raw water from 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 or ion-depleted 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 all gases other than oxygen such as 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 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 system using the combustion energy of the fuel.

Hereinafter, the 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 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, the raw material and the raw water, which are introduced into the hydrogen generator 400, and the fuel generated in the hydrogen generator 400 and introduced into the fuel cell 210 are defined as the 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 is a temperature sensor and a device for maintaining temperature. That is, a heater or a cathode fan, a fuel electrode fan, a cooling plate, or 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, the reacts electrochemically with water (H ₂ 0) and electron (e-) are 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) 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 to discharge the water (H ₂ 0 as a liquid or gaseous), such as residual material and 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 water (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. 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 carbonic acid ions (CO ₃ ^-2 ). Carbonate ions (C0 _3- ²⁾ is moved to the fuel electrode (anode) through the electrolyte. 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 this specification, the raw material and the raw water that are introduced into the hydrogen generating unit 400 and the fuel that is generated in the hydrogen generating unit 400 and flows into the fuel cell 210 are defined as the fuel.

The hydrogen generator 400 may be designed to have various structures depending on the type of the fuel cell 210 or to improve the 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 processing unit 410 may include an LNG evaporator for evaporating 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., 410) including the methane flame for generating a marine gas oil (MGO), marine diesel oil (MDO), or the general fuel oil (HFO) methane by the reaction of the heated raw material and the heater applies heat the catalyst to the (CH ₄₎ Can be implemented. 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 fuel supplied from the raw material treatment unit 410 and the steam H ₂ 0 supplied from the raw water treatment unit 420 to supply hydrogen (H ₂ ) Thereby generating a reforming gas. In the reforming reaction, the reformer 430 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 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 the 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 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 is adjusted by the conditions of the reformer 430 and the mixture ratio of the fuel pretreated in the raw material processing unit 410 and steam (H ₂ O) 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 controller 250 controls the combustor 440 The temperature of the reformer 430 is controlled by increasing or decreasing the amount of raw material combustion. 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 10-20 ppm or less, the hydrogen generating unit 400 may further include a water gasification reactor (WGS) 450.

The water gasification reactor (WGS) 450 reacts with carbon monoxide (CO) and steam (H ₂ O) to produce carbon dioxide (CO ₂ ) and hydrogen (H ₂ ). The water gasification reactor (WGS) 450 may 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), which receives air from an air supply unit and burns only the carbon monoxide (CO) in the gas discharged 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 an embodiment of the present invention includes the controller 250 (shown in FIG. 2), the controller 250 controls the cooler using a signal output from the temperature sensor The temperature of the selective oxidation reactor (PROX) is controlled. For example, the selective oxidation reactor (PROX) is controlled within 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 to 7 are conceptual diagrams of a fuel cell system according to a second embodiment of the present invention, Fig. 8 is a configuration diagram according to the first embodiment of the fuel cell system of Fig. 5, Fig. 9 is a cross- Fig. 10 is a structural view of the fuel cell system according to the third embodiment of the fuel cell system, Fig. 11 is a schematic view of the fuel cell system according to the fourth embodiment of the fuel cell system of Fig. 5 FIG. 1 to 4, the same reference numerals are used.

5 to 7, a fuel cell system 200 according to a second embodiment of the present invention includes a fuel cell 210, a hydrogen generator 400, a turbine 500, and a first heat exchanger 600 ). The turbine unit 500 may include a gas turbine 510 that generates driving force using gas. The first heat exchanger 600 may be a heat recovery steam generator (HRSG). The fuel cell system 200 according to the present invention controls operations of all the configurations including the fuel cell 210, the hydrogen generator 400, the turbine unit 500, and the first heat exchanger 600 And a control unit 250 for controlling the operation of the apparatus.

The fuel cell system 200 and the turbine unit 500 according to the second embodiment of the present invention are configured to receive fuel from the hydrogen generation unit 400.

Referring to FIGS. 5 to 7, the fuel cell 210 may supply fuel containing hydrogen from the hydrogen generator 400 to produce electricity through an electrochemical reaction. For example, the fuel cell 210 may receive fuel containing hydrogen from the reformer 430 and generate electricity through an electrochemical reaction. The fuel cell 210 may include one or more fuel cell modules. For example, 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 a methanol fuel cell (DMFC). The fuel cell 210 can supply exhaust gas generated through an electrochemical reaction to the hydrogen generating unit 400. For example, the fuel cell 210 may supply exhaust gas to the combustor 440. Although not shown, in order to maintain the operating temperature of the fuel cell 210, a heat exchanger and a cooler for adjusting the temperature of the fuel and the air may be installed and operated.

5 to 7, the hydrogen generator 400 may include a raw material processing unit 410, a raw water treatment unit 420, a reformer 430, and a combustor 440. The hydrogen generator 400 receives the raw material from the raw material processor 410 and receives water from the raw water processor 420 to generate fuel containing hydrogen required for the fuel cell 210. The raw materials stored in the raw material storage tank may include at least one of MGO, MDO, HFO, methanol, dimethyl ether (DME) And the like. In this specification, LNG (liquefied natural gas) can be vaporized and used as fuel for the fuel cell 210 and the gas turbine 510.

The raw material processing unit 410 may include an LNG evaporator 4101 for evaporating LNG (liquefied natural gas) supplied from a raw material supply unit 110 including an LNG storage tank. The LNG evaporator 4101 may further include a first vaporizer 4102 connected to the combustor 440 and a second vaporizer 4103 connected to the first heat exchanger 600. The first vaporizer 4102 is installed to be connected to the combustor 440 so that waste heat of the exhaust gas discharged from the combustor 440 is used as a heat source to vaporize LNG (liquefied natural gas) in the LNG evaporator 4101 . The second vaporizer 4103 is installed to be connected to the first heat exchanger 600 so that the waste heat of the exhaust gas of the gas turbine 510 discharged from the first heat exchanger 600 is supplied to the LNG LNG (liquefied natural gas) may be vaporized in the evaporator 4101.

The raw water treatment unit 420 receives raw water (for example, water) from the raw water supply unit 120 and preprocesses the raw water. The raw water treatment unit 420 may include a condenser 121. The condenser 121 is connected to the raw water supply unit 120, the first heat exchanger 600, and the steam turbine 520 (shown in FIG. 7). The steam turbine 520 may be included in the turbine unit 500. The condenser 121 is a type of condenser that takes away the heat of evaporation of steam (H ₂ 0) flowing from the steam turbine (520) by the cooling water supplied from the raw water supply part (120) thereby reducing the steam (H ₂ 0) with water. The condenser 121 can supply the reduced water to the first heat exchanger 600. The steam turbine 520 is installed to be connected to the first heat exchanging part 600 and can receive the steam H ₂ 0 discharged from the first heat exchanging part 600. Although not shown, the steam turbine 520 may include a diaphragm, a rotor, a bucket, and a generator. The diaphragm is provided with a fixed blade, and the bucket is provided with a rotor blade. The fixed wing changes the direction of the steam (H ₂ 0) discharged from the first heat exchanging part (600) to induce it to the rotor blade, and the rotor blade generates a rotational force by the steam (H ₂ 0) Rotate the rotor. The rotor is installed to be connected to the generator. The generator can produce electricity as the rotor rotates. Accordingly, the steam turbine 520 can generate electricity using the steam H ₂ 0 discharged from the first heat exchanger 600. The electricity generated by the steam turbine 520 may be supplied to an electric equipment or an energy storage device, for example, a battery. Therefore, the fuel cell system 200 according to the second embodiment of the present invention can produce electricity separately from the fuel cell 210. Steam (H ₂ 0) passing through the steam turbine 520 may be supplied to the condenser 121 and the reformer 430.

The reformer 430 reforms the pre-treated fuel supplied from the raw material treatment unit 410 and the steam H ₂ 0 supplied from the raw water treatment unit 420 to supply hydrogen (H ₂ ) Thereby generating a reforming gas. In the reforming reaction, the reformer 430 may use thermal energy provided by the combustor 440. Hereinafter, a reformed gas containing hydrogen generated in the reformer 330 is defined as a fuel.

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) may be generated in the reformer 430 have. 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 unit 410, the exhaust gas discharged from the anode of the fuel cell stack of the fuel cell 210, the exhaust gas from the LNG evaporator 440, Or a mixture of the exhaust gas of the gas turbine 510 and the exhaust gas of the gas turbine 510 that has passed through the catalytic converter 4103 may be used as the 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 further use air discharged from the cathode of the fuel cell stack of the fuel cell 210.

5 to 7, the turbine unit 500 may include a gas turbine 510 and a steam turbine 520.

The gas turbine 510 generates a driving force through combustion of the gaseous fuel. The gas turbine is installed to be connected to the generator, and can generate electricity by providing the generated driving force to the generator. In addition, the gas turbine may be installed in the same shaft as the compressor, and may provide the generated driving force to the compressor. In this case, the compressor can compress fluid such as air, water, and the like.

The gas turbine 510 is connected to the LNG evaporator 4101. Accordingly, the gas turbine 510 can generate electricity from the fuel supplied from the LNG evaporator 4101. Although not shown, the gas turbine 510 may be implemented to include a compressor for compressing air, a combustor for combusting compressed air with fuel, and a turbine for expanding the exhaust gas after combustion. The compressor compresses the air supplied from the air supply unit 130. The air in the high pressure state by the compressor is mixed with the fuel supplied from the LNG evaporator 4101 in the combustor and burned. The exhaust gas discharged from the combustor is supplied to the turbine at a high temperature and a high pressure. Accordingly, the turbine is rotated by the exhaust gas of the combustor, thereby rotating the rotary shaft coupled to the turbine blade. The rotary shaft of the turbine is connected to a rotary shaft of a generator (shown in FIG. 7). Accordingly, the generator can generate electricity as the rotary shaft of the turbine is rotated.

The steam turbine 520 generates a driving force for producing electricity by high temperature and high pressure steam (H ₂ 0). The steam turbine 150 may include a diaphragm, a rotor, a bucket, and a generator. The diaphragm is provided with a fixed blade, and the bucket is provided with a rotor blade. The fixed wing changes the direction of the supplied steam (H ₂ 0) to be guided to the rotor blade, and the rotor blade rotates by generating a rotational force by steam (H ₂ 0) derived from the fixed blade. The rotor is installed to be connected to the generator, and can generate electricity as the rotor rotates.

5 to 7, the first heat exchanger 600 is installed between the condenser 121 and the steam turbine 520. The first heat exchanging unit 600 exchanges exhaust gas discharged from the gas turbine 510 and the condenser 121 to heat the steam H ₂ 0 supplied to the steam turbine 520 from the condenser 121. And the steam (H ₂ 0) discharged from the heat exchanger is heat-exchanged. For example, the first heat exchanger 600 may be a heat recovery steam generator (HRSG). Although not shown, the HRSG may comprise an economizer, an evaporator, a superheater, and a water preheater. The steam generator (HRSG) comprises a steam drum at the upper side and one or more water drums at the lower side. The steam drum and the water drum are connected to each other by a plurality of water pipes to form a tube group, The exhaust gas discharged from the gas turbine 510 passes through the heat exchanging part with water outside the tubular part to generate steam (H ₂ O). In this case, the waste heat of the exhaust gas discharged from the gas turbine 510 becomes a heat source for generating steam by heating the water supplied from the condenser 121. Accordingly, steam (H ₂ 0) discharged from the first heat exchanger (600) to the steam turbine (520) is in a high temperature and high pressure state. The exhaust gas of the gas turbine 510 passing through the first heat exchanger 600 may be supplied to the LNG evaporator 4101. In this case, the LNG evaporator 4101 can vaporize LNG (liquefied natural gas) using waste heat of the exhaust gas of the gas turbine 510 discharged from the first heat exchanger 600 as a heat source. The gas turbine exhaust gas discharged through the LNG evaporator 4101 is supplied to the combustor 440 of the fuel cell system 200 to perform a reforming reaction to the reformer 430 through the combustion of unburned fuel in the exhaust gas It is possible to supply the necessary heat to the heat exchanger.

Accordingly, 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 includes waste heat of the exhaust gas discharged from the combustor 440 and exhaust gas of the gas turbine 510 discharged from the first heat exchange unit 600 LNG (liquefied natural gas) can be vaporized using at least one of gas waste heat. Accordingly, the fuel cell system 200 according to the second embodiment of the present invention can use LNG (liquefied natural gas) supplied to the conventional heating device for electricity production, thereby increasing the electricity production amount.

Second, the fuel cell system 200 according to the second embodiment of the present invention includes the waste heat of the exhaust gas discharged from the combustor 440 and the exhaust gas of the gas turbine 510 discharged from the first heat exchange unit 600 (Liquefied natural gas) is vaporized using at least one of the waste heat and the gas waste heat, so that it is possible to omit a separate heating device, so that the construction cost consumed for producing electricity can be reduced, .

Third, the fuel cell system 200 according to the second embodiment of the present invention includes the gas turbine 510 and the steam turbine 520, which generates steam generated by the heat of the exhaust gas discharged from the gas turbine 510 The electric power generation efficiency can be improved because the electric power can be additionally produced separately from the fuel cell 210.

Referring to FIG. 8, the first embodiment of the fuel cell system 200 according to the present invention may further include an air supply unit 130 and a second heat exchange unit 700.

The air supply unit 130 is installed to supply air to the gas turbine 510. Normally, air means a gas including nitrogen, oxygen, carbon dioxide and the like, but also includes the case where nitrogen or carbon dioxide or all gases other than oxygen 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 external air and then supply compressed high-pressure air or atmospheric pressure.

The second heat exchanger 700 exchanges heat between the exhaust gas discharged from the combustor 440 and the exhaust gas of the gas turbine 510 discharged from the LNG evaporator 4101. Accordingly, the exhaust gas of the gas turbine 510 heated by the exhaust gas of the combustor 440 in the second heat exchanger 700 can be supplied to the combustor 440.

Accordingly, in the first embodiment of the fuel cell system 200 according to the present invention, the exhaust gas discharged from the gas turbine 510 and discharged through the LNG evaporator 4101 is discharged from the second heat exchanger 700 And is supplied to the combustor 440 by heating. Accordingly, the unburned fuel contained in the exhaust gas of the gas turbine 510 is combusted in the combustor 440, thereby reducing the amount of fuel required in the combustor 440 and increasing the efficiency of the fuel cell system 200 And environmental pollution caused by discharge of unburned fuel contained in the exhaust gas of the gas turbine 510 can be reduced.

9, the second embodiment of the fuel cell system 200 according to the present invention is characterized in that the second heat exchanging part 700 is installed between the first heat exchanging part 600 and the LNG evaporator 4101 . The second heat exchanger 700 exchanges heat between the exhaust gas discharged from the combustor 440 and the exhaust gas from the gas turbine 510 discharged from the first heat exchanger 600. The exhaust gas of the gas turbine 510 cooled in the first heat exchanger 600 to generate steam for supplying the steam turbine 520 is exhausted from the second heat exchanger 700 to the combustor 440) through heat exchange with the exhaust gas. The reheated gas turbine (510) exhaust gas discharged from the second heat exchanger may be supplied to the LNG evaporator (4101) and used to vaporize the LNG. The exhaust gas discharged from the LNG evaporator 4101 may be supplied to the combustor 440 to supply heat to the reformer 430 through the combustion of the unburned fuel. Accordingly, by reducing the amount of fuel required in the combustor 440 and increasing the temperature of the exhaust gas supplied to the LNG evaporator 4101 from the first heat exchanger 600 to the exhaust gas of the combustor 440, It is possible to increase the efficiency of the battery system 200 and to reduce the environmental pollution due to the discharge of the unburned fuel contained in the exhaust gas of the gas turbine 510.

Referring to FIG. 10, the third embodiment of the fuel cell system 200 according to the present invention is a case where the second heat exchanger 700 is installed at the rear end of the LNG evaporator 4101. The second heat exchanger 700 exchanges heat between the air supplied from the air supply unit 130 and the exhaust gas of the combustor 440 discharged from the LNG evaporator 4101. In this case, the exhaust gas of the combustor 440 discharged from the LNG evaporator 4101 becomes a cooling medium for cooling the air supplied to the gas turbine 510. The exhaust gas of the combustor 440 discharged from the LNG evaporator 4101, that is, the exhaust gas of the combustor 440 discharged from the rear end of the LNG evaporator 4101, is supplied from the LNG evaporator 4101 to the LNG Gas) is lower than the exhaust gas at the front end of the LNG evaporator 4101 because it is used as a heat source for vaporizing the LNG vapor. Accordingly, the temperature of the air that is heat-exchanged in the second heat exchange unit 700 and is supplied to the gas turbine 510 is lower than that of the air supplied from the air supply unit 130. If the temperature of the air supplied to the gas turbine 510 is high according to the first embodiment, the efficiency of the gas turbine 510 may be reduced because the air compression ratio is low. Therefore, in the second embodiment of the fuel cell system 200 according to the present invention, when the temperature of the air supplied to the gas turbine 510 is high according to the first embodiment, the rear end of the LNG evaporator 4101 The efficiency of the gas turbine 510 can be prevented from being lowered by reducing the temperature of the air supplied to the gas turbine 510 by disposing the second heat exchanger 700 in the second heat exchanger 700.

Referring to FIG. 11, the fourth embodiment of the fuel cell system 200 according to the present invention may further include an air supply unit 130 and a third heat exchange unit 800. Since the air supply unit 130 is as described above, the third heat exchange unit 800 will be described in detail.

The third heat exchanging unit 800 exchanges heat between the exhaust gas of the gas turbine 510 supplied from the LNG evaporator 4101 and the exhaust gas discharged from the fuel cell 210. In this case, the exhaust gas discharged from the fuel cell 210 becomes a heat source for heating the exhaust gas of the gas turbine 510 discharged from the LNG evaporator 4101 supplied to the combustor 440. Accordingly, the exhaust gas of the LNG evaporator 4101 that has passed through the third heat exchanging unit 800 can be supplied to the combustor 440 at a high temperature. Therefore, in the fourth embodiment of the fuel cell system 200 according to the present invention, the exhaust gas that is supplied from the gas turbine 510 to the LNG evaporator 4101 and cooled is discharged from the third heat exchanging unit 800 The combustion efficiency of the combustor 440 can be improved by being heated by heat exchange with the exhaust gas of the fuel cell 210 and supplied to the combustor 440 to be burned.

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

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

Referring to FIGS. 1 to 12, 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 fuel cell 210, a hydrogen generator 400, a turbine 500, a first heat exchanger 600, a second heat exchanger 700 and a third heat exchanger 800, . The turbine section 500 may include a gas turbine 510 and a steam turbine 520. The fuel cell system 200 includes the fuel cell 210, the hydrogen generator 400, the gas turbine 510, the steam turbine 520, the first heat exchanger 600, And a control unit 250 for controlling the operation of all components including the first heat exchanging unit 700 and the third heat exchanging unit 800.

The fuel cell 210 is supplied with hydrogen-containing fuel from the hydrogen generator 400 and can generate electricity through an electrochemical reaction. For example, the fuel cell 210 may generate electricity through an electrochemical reaction between a fuel including hydrogen supplied from the reformer 430 and air supplied from the air supply unit 130, such as hydrogen, and oxygen. have. 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 a battery (DMFC).

The hydrogen generator 400 may include a raw material processing unit 410, a raw water treatment unit 420, a reformer 430, and a combustor 440. The raw material processing unit 410 includes an LNG evaporator 4101 for supplying raw material from the raw material supply unit 110 and a pretreatment process and a first vaporizer 4102 and a second vaporizer 4103 installed in the LNG vaporizer 4101 do. The raw water treatment unit 420 may include a condenser 121 for pretreating the water supplied from the raw water supply unit 120. The hydrogen generator 400 is hydrogen required for the fuel cell 210 through a reforming reaction when supplied with receiving supply of a raw material and steam (H ₂ 0) from the raw water supply unit 120 from the material feed portion (110) To generate fuel. The LNG evaporator 4101 is installed to be connected to the combustor 440 and can vaporize LNG (liquefied natural gas) using waste heat of the exhaust gas discharged from the combustor 440 as a heat source. The combustor 440 is connected to the raw material pretreated in the raw material processing unit 410, the exhaust gas discharged from the anode of the fuel cell stack of the fuel cell 210, the gas turbine 510), or a mixture of the three gases may be used as the fuel. The combustor 440 can supply heat to the reformer 430 through a combustion reaction between the air supplied from the air supply unit 130 and the fuel.

The gas turbine 510 can generate electricity from the fuel supplied from the LNG evaporator 4101. The gas turbine 510 may be implemented including a compressor, a combustor, and a turbine. The gas turbine 510 may operate the generator connected to the turbine by operating the turbine by compressing and burning fuel supplied from the LNG evaporator 4101. Accordingly, the gas turbine 510 can produce electricity.

The first heat exchanging unit 600 exchanges heat between exhaust gas discharged from the gas turbine 510 and water supplied from the condenser 121. For example, the first heat exchanger 600 may be a heat recovery steam generator (HRSG). The waste heat of the exhaust gas discharged from the gas turbine 510 becomes a heat source for heating the water supplied from the condenser 121. Accordingly, the first heat exchanging unit 600 can convert the water supplied from the condenser 121 into steam (H ₂ 0). The steam H ₂ 0 passing through the first heat exchanging unit 600 may be supplied to the steam turbine 520 (shown in FIG. 7) to be a power source for the steam turbine 520 to generate electricity. The exhaust gas of the gas turbine 510 passing through the first heat exchanging unit 600 may be supplied to the LNG evaporator 4101 and used as a heat source for vaporizing the LNG (liquefied natural gas). The exhaust gas of the gas turbine 510 discharged through the LNG evaporator 4101 is supplied to the combustor 440 of the fuel cell system 200 and is supplied to the reformer through the combustion of the unburned fuel in the exhaust gas. 430) can be supplied with heat required for the reforming reaction.

The second heat exchanger 700 exchanges heat between the exhaust gas of the gas turbine 510 discharged from the LNG evaporator 4101 and the exhaust gas discharged from the combustor 440. Accordingly, the second heat exchanger 700 can supply the exhaust gas of the gas turbine 510, which is heated by the exhaust gas of the combustor 440, to the combustor 440. The second heat exchanger 700 may be installed at at least one of a front end (shown in FIG. 9) and a rear end (shown in FIG. 10) of the LNG evaporator 4101. When the second heat exchanger 700 is installed at the rear end of the LNG evaporator 4101, the second heat exchanger 700 discharges air supplied from the air supply unit 130 and the air discharged from the LNG evaporator 4101 The exhaust gas of the combustor 440 is heat-exchanged. In this case, the exhaust gas of the combustor 440 discharged from the LNG evaporator 4101 becomes a cooling medium for cooling the air supplied to the gas turbine 510. Accordingly, since the temperature of the air supplied to the gas turbine 510 after heat exchange in the second heat exchanger 700 is lower than that of air supplied from the air supply unit 130, The efficiency can be higher than when using atmospheric air.

The third heat exchanging unit 800 exchanges heat between the exhaust gas of the gas turbine 510 supplied from the LNG evaporator 4101 and the exhaust gas discharged from the fuel cell 210. In this case, the exhaust gas discharged from the fuel cell 210 becomes a heat source for heating the exhaust gas of the gas turbine 510 discharged from the LNG evaporator 4101 to supply the combustor 440. Accordingly, the exhaust gas of the LNG evaporator 4101 that has passed through the third heat exchanging unit 800 can be supplied to the combustor 440 at a high temperature. The air passing through the second heat exchanging unit 700 is heat-exchanged with the exhaust gas of the combustor 440 discharged from the LNG evaporator 4101 to be cooled more than the air supplied from the air supplying unit 130, And may be supplied to the gas turbine 510.

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

First, the ship 900 according to the present invention uses at least one of the waste heat of the exhaust gas discharged from the combustor 440 and the exhaust gas waste heat of the gas turbine 510 discharged from the first heat exchange unit 600 To vaporize LNG (liquefied natural gas). Accordingly, the fuel cell system 200 according to the second embodiment of the present invention can use LNG (liquefied natural gas) supplied to the conventional heating device for electricity production, thereby increasing the electricity production amount.

Second, the ship 900 according to the present invention uses at least one of the waste heat of the exhaust gas discharged from the combustor 440 and the exhaust gas waste heat of the gas turbine 510 discharged from the first heat exchange unit 600 The liquefied natural gas (LNG) is vaporized, so that a separate heating device can be omitted, so that the construction cost consumed for producing electricity can be reduced and the versatility for the installation space can be increased.

Thirdly, the ship 900 according to the present invention can additionally generate electricity separately from the fuel cell 210 by installing the turbine unit 500 composed of the gas turbine 510 and the steam turbine 520 Electric productivity and electric production efficiency can be improved.

Fourth, in the case where the second heat exchanger 700 is disposed at the rear end of the LNG evaporator 4101, the ship 900 according to the present invention can reduce the temperature of the gas supplied to the gas turbine 510, The efficiency of the turbine 510 can be prevented from being lowered.

Fifth, the ship 900 according to the present invention is installed in the third heat exchanger 800 in the gas turbine 510 and supplies the cooled exhaust gas to the LNG evaporator 4101 and the exhaust gas from the fuel cell 210 So that the combustion efficiency of the combustor 440 can be increased.

Referring to FIGS. 1 to 11, 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 a propulsive force for moving the hull 910 and a material supply unit 110 for supplying the material to the engine. For example, the raw material is a material of a hydrocarbon series, NG (natural gas), LPG (liquefied petroleum gas), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), petrol, dimethyl ether, methane, hydrogen Liquid raw materials having a relatively high molecular weight such as refined off gas, pure water, and marine gas oil (MGO), marine diesel oil (MDO), and heavy fuel 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 source water may be, for example, a constant, freshwater, or seawater. In another example, the raw water may be impurity removal treatment or ion removal treatment in a constant, fresh, 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 all gases other than oxygen such as 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 140 is provided. The power conversion unit 140 discharges the electric power supplied from the fuel cell system 200 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 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
210: fuel cell 250:
400: hydrogen generator 500: turbine
510: gas turbine 520: steam turbine
600: first heat exchanger 700: second heat exchanger
800: Third heat exchanger

Claims (6)

As a vessel,
A raw material supply unit for supplying LNG (liquefied natural gas);
A raw water supply part for supplying raw water;
A fuel cell system for producing electricity using LNG (liquefied natural gas) supplied from the raw material supply unit and raw water supplied from the raw water supply unit; 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 raw water treatment section including an LNG evaporator for evaporating LNG to pretreat LNG (liquefied natural gas) supplied from the raw material supply section; a raw water treatment section for pretreating the raw water supplied from the raw water supply section; A reforming unit for reforming the pre-treated fuel and the steam (H ₂ 0) supplied from the raw water treatment unit, and a combustor for heating the reformer;
A fuel cell that generates electricity based on fuel containing hydrogen supplied from the hydrogen generating unit;
A turbine section including a gas turbine for generating electricity from fuel supplied from the LNG evaporator; And
And a first heat exchange unit for exchanging heat between exhaust gas discharged from the gas turbine and water supplied from the raw water treatment unit,
Wherein the LNG evaporator vaporizes LNG (liquefied natural gas) using at least one of exhaust gas discharged from the combustor and exhaust gas discharged from the first heat exchange unit. A raw material treatment section including an LNG evaporator for evaporating LNG to pretreat LNG (liquefied natural gas) supplied from a raw material supply section; a raw water treatment section for pretreating the raw water supplied from the raw water supply section; A hydrogen generator including a reformer for reforming the fuel and the steam (H ₂ 0) supplied from the raw water treatment unit, and a combustor for heating the reformer;
A fuel cell that generates electricity based on fuel containing hydrogen supplied from the hydrogen generating unit;
A turbine section including a gas turbine for generating electricity from fuel supplied from the LNG evaporator; And
And a first heat exchange unit for exchanging heat between exhaust gas discharged from the gas turbine and water supplied from the raw water treatment unit,
Wherein the LNG evaporator vaporizes LNG (liquefied natural gas) using at least one of exhaust gas discharged from the combustor and exhaust gas discharged from the first heat exchanger. 3. The method of claim 2,
And a second heat exchanger for exchanging heat between the exhaust gas discharged from the combustor and the exhaust gas of the gas turbine discharged from the LNG evaporator so as to heat the exhaust gas of the gas turbine supplied to the combustor. The method of claim 3,
Wherein the second heat exchanger is installed at least one of a front end of the LNG evaporator and a rear end of the LNG evaporator. 3. The method of claim 2,
An air supply for supplying air to the gas turbine; And
And a second heat exchanger for exchanging heat between exhaust gas discharged from the LNG evaporator and air supplied from the air supply unit to cool the air supplied to the gas turbine. 3. The method of claim 2,
Wherein the turbine section includes a steam turbine that generates electricity using steam (H ₂ 0) discharged from the first heat exchange section.

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