KR101835061B1 - Power supply system of ship and method using the same - Google Patents

Abstract

A power supply system for a ship and a power supply method for a ship using the same are disclosed.
A power supply system for a ship according to an embodiment of the present invention includes a storage tank in which fuel is stored and compresses and condenses the evaporated gas in which the fuel is evaporated in the storage tank to separate the liquid evaporated gas and the vapor- A first fuel reforming section for supplying the vaporized gas of the liquid phase from the fuel supply section and reforming the reformed gas to generate hydrogen-containing reformed gas; a reforming section for supplying the vaporized vaporized gas from the fuel supply section, A power generation unit including at least one fuel cell for generating power using the reformed gas containing hydrogen, and a power storage unit for storing the power generated by the power generation unit do.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power supply system for a ship,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for a ship and a method of supplying power to a ship using the same, and more particularly, to a power supply system for a ship including at least one fuel cell and a method of supplying power to the ship using the system.

In recent years, fuel cells that generate electricity by reacting hydrogen and oxygen are emerging as power supply systems capable of actively coping with the depletion of fossil energy.

In general, high temperature fuel cells such as Molten Carbonate Fuel Cell (MCFC) and Solid Oxide Fuel Cell (SOFC) can apply hydrocarbon fuels. Therefore, crude oil and liquefied natural gas It is highly likely to be used as a power supply system for driving ships carrying ships.

However, when a fuel cell is installed as a power supply system on a ship, there is a problem in that the cost of operating the fuel cell is increased because separate fuel must be continuously supplied to the fuel cell.

Korean Patent Publication No. 10-2014-0044125 (published April 14, 2014)

Embodiments of the present invention are directed to a power supply system of a ship capable of being utilized as an energy source of a fuel cell and an explosion-proof material of the storage tank by modifying vaporized gas generated in a storage tank after gas-liquid separation, .

According to an aspect of the present invention, there is provided a fuel supply system comprising: a fuel supply unit including a storage tank in which fuel is stored; a fuel supply unit for compressing and condensing evaporated gas in which fuel is evaporated in the storage tank to vapor- A first fuel reforming unit for supplying the vaporized gas of the liquid phase from the fuel supply unit and reforming the reformed gas to generate hydrogen-containing reformed gas, a purge gas supply unit for supplying the vaporized vaporized gas from the fuel supply unit, A power generation unit including at least one fuel cell for generating power using the reformed gas containing hydrogen, and a power storage unit for storing the power generated by the power generation unit A ship's power supply system can be provided.

The fuel supply unit may include a compression device connected to the storage tank and adapted to receive and compress the evaporated gas, a condenser connected to the compression device for cooling the evaporated gas compressed by the compression device, And a gas-liquid separator connected to the condenser and separating the evaporated gas cooled in the condenser into the liquid evaporated gas and the gaseous evaporated gas.

The first fuel reforming unit may include a steam generator for generating steam, a steam reformer for reforming the steam generated by the steam generator and the liquid-phase evaporation gas supplied from the fuel supplier into a reformed gas containing hydrogen, A reforming device, and a first heating device for heating the steam generating device and the first reforming device.

The second fuel reforming unit may further include a second reforming unit for reforming the gaseous vaporized gas supplied from the fuel supply unit into flushing gas, a second heating unit for heating the second reforming unit, And a blowing device for supplying the reformed flushing gas to the storage tank.

The power control unit may further include a power controller connected to the power storage unit and controlling the generated power.

The embodiments of the present invention can modulate the vaporized gas generated in the storage tank after gas-liquid separation and utilize it as an energy source of the fuel cell and an explosion-proof material of the storage tank. Therefore, Even if it reduces operating costs, safe operation is possible.

1 is a configuration diagram illustrating a power supply system for a ship according to an embodiment of the present invention.
Fig. 2 is a configuration diagram showing the fuel supply unit of Fig. 1. Fig.
Fig. 3 is a configuration diagram showing the first fuel reforming unit of Fig. 1. Fig.
Fig. 4 is a configuration diagram showing the second fuel reforming unit of Fig. 1. Fig.
5 is a perspective view showing the power generator of FIG.
6 is a flowchart showing a method of supplying power to a ship according to an embodiment of the present invention.
7 is a flowchart showing a method of gas-liquid separation of a vaporized gas in a fuel supply unit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention.

However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals such as first, second, etc. may be used to describe various elements, but the elements are not limited by such terms. These terms are used only to distinguish one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

1 is a configuration diagram illustrating a power supply system for a ship according to an embodiment of the present invention.

Referring to FIG. 1, a power supply system 10 of a ship includes a fuel supply unit 100, a first fuel reforming unit 200, a second fuel reforming unit 300, a power generation unit 400, a power storage unit 500, and a power control unit 600.

The fuel supply unit 100 may be connected to the first fuel reforming unit 200 and the second fuel reforming unit 300. The fuel supply unit 100 may be connected to the first fuel reforming unit 200 and the second fuel reforming unit 300, To the fuel reforming unit (200) and the second fuel reforming unit (300).

The first fuel reforming unit 200 can reform the vaporized gas in the liquid phase separated in the fuel supply unit 100 to generate a reformed gas containing hydrogen.

The second fuel reforming unit 300 may reform purge gas of the gas phase separated in the fuel supply unit 100 to generate purge gas.

The power generation unit 400 can be supplied with reformed gas containing hydrogen by being reformed in the first fuel reforming unit 200, and can generate power using the reformed gas.

The power storage unit 500 may store the power generated by the power generation unit 400.

The power control unit 600 is connected to the power storage unit 500 and appropriately distributes the power stored in the power storage unit 500 to devices requiring power in the ship (for example, a motor, a pump, an engine, etc.) .

Although not shown in FIG. 1, the power supply system 10 of the ship may further include an air supply device that supplies air in the atmosphere to the power generation unit 400.

Hereinafter, detailed configurations of the fuel supply unit 100, the first fuel reforming unit 200, the second fuel reforming unit 300, and the power generation unit 400 will be described with reference to FIG. 2 to FIG.

FIG. 2 is a configuration diagram showing the fuel supply unit of FIG. 1, FIG. 3 is a configuration diagram of the first fuel reforming unit of FIG. 1, FIG. 4 is a configuration diagram of the second fuel reforming unit of FIG. 1, 1 is a perspective view showing a power generation unit.

2 through 5, the fuel supply unit 100 may include a storage tank 110, a compression device 120, a condenser 130, and a gas-liquid separator 140.

In the storage tank 110, crude oil or fuel may be stored, and such crude oil or fuel may be evaporated to generate an evaporative gas. In addition, a pump 115 for loading or unloading crude oil or fuel may be connected to the storage tank 110 at one side of the storage tank 110, and the pump 115 may be a bidirectional pump. However, the present invention is not limited to this. The storage tank 110 is provided with a line for loading crude oil or fuel, and a line for loading and unloading, so that a loading pump and a loading pump are provided for each line. .

The compression device 120 is connected to the storage tank 110 and can receive and compress the evaporated gas. As shown in FIG. 2, the compression device 120 may be connected to a compression motor 125 for driving the compression device 120.

Condenser 130 may be coupled to compression device 120, and may be provided as a heat exchanger, for example. In this way, the condensing device 130 can cool the evaporated gas compressed by the compression device 120 using the cooling water such as seawater, fresh water or the like separately provided, and can discharge the high-temperature cooling water.

2, the high-temperature cooling water obtained in the process of cooling the evaporated gas compressed in the compression device 120 is supplied to the heat of the crude oil or fuel loaded in the storage tank 110 of the fuel supply part 100 It can be utilized as a heating medium. In other words, the aforementioned hot cooling water can be used to heat the storage tank 110.

The gas-liquid separator 140 is connected to the condenser 130 and is capable of separating the evaporated gas cooled in the condenser 130 into a liquid-phase evaporated gas and a vapor-phase evaporated gas.

Although not shown in FIG. 2, the liquid-phase evaporated gas separated from the gas-liquid separator 140 is temporarily stored in the temporary storage tank, and is discharged from the temporary storage tank, if necessary, to the first fuel reforming unit 200 As supplied, it can be reformed into a reformed gas containing hydrogen.

The gaseous vaporized gas separated by the gas-liquid separator 140 may be supplied to the second fuel reforming unit 200 and reformed into a flushing gas such as methane (CH ₄ ).

3, the first fuel reforming unit 200 may include a steam generating unit 210, a first reforming unit 220, and a first heating unit 230.

The steam generator 210 may be connected to the power generator 400 and may receive the hot water generated during the power generation by the power generator 400 and generate steam using the hot water. However, the spirit of the present invention is not limited to this, and it is also possible to generate water vapor using water or seawater supplied from a separately provided water supply device such as a water tank or the like.

The first reforming unit 220 may be supplied with the vapor generated in the steam generating unit 210 and the liquid vapor separated from the gas-liquid separator 140, and may be supplied with the reforming gas containing hydrogen Lt; / RTI > At this time, in order for the steam reforming reaction to occur in the first reforming unit 220, the first reforming unit 220 must be heated to a predetermined temperature suitable for the steam reforming reaction. To this end, the first heating device 230 can heat the first reforming device 220 to a temperature required for the reforming reaction to occur.

Also, the first heating device 230 can heat the steam generating device 210 to a temperature required for generating steam. For example, the first heating device 230 can heat the steam generating device 210 and the first reforming device 220 in one of a burner type using a flame flame or a catalytic oxidation method using a catalytic oxidation reaction have.

Since the steam reforming reaction occurring in the first reforming unit 220 is an exothermic reaction, the reforming reaction is repeatedly induced in the first reforming unit 220 using the reaction generation heat generated in the first reforming unit 220 It is possible.

Further, although not shown, an unnecessary gas generated as a reaction product in the steam reforming process may be generated. Therefore, a discharge device capable of discharging unnecessary gas generated from the reaction product may be additionally provided.

In this embodiment, the first reforming device 220 has been described as generating a reformed gas containing hydrogen using a steam reforming reaction, but according to an embodiment, the first reforming device 220 uses a plasma reforming reaction Thereby producing a reformed gas containing hydrogen. For example, the first reforming unit 220 may plasma-react the vapor generated in the steam generator 210 with a liquid-phase evaporation gas separated from the gas-liquid separator 140 by using an external power source, The reforming gas may be generated.

4, the second fuel reforming unit 300 may include a second reforming unit 310, a second heating unit 320, and a blowing unit 330.

The second reforming device 310 can reform the gaseous vaporized gas supplied from the gas-liquid separator 140 into a flushing gas. Specifically, the second reformer 310 ethane (C ₂ H _6), propane (C ₃ H ₈₎ is selectively decomposed and the like can be modified as methane (CH _4), a reforming of methane (CH ₄₎ Can be used as a flushing gas.

On the other hand, in the second reforming apparatus 310, the reaction in which the vaporized gas is reformed into the flushing gas is an endothermic reaction, and it is necessary to heat the second reforming apparatus 310 to a temperature required for the reforming reaction. for teeth. A second heating device 320 is provided and the second heating device 320 can heat the second reforming device 310 to a temperature required for the reforming reaction to occur.

The blowing device 330 may reduce the risk of explosion or fire in the storage tank 110 by supplying the storage tank 110 with the flushing gas modified by the second reforming device 310.

In the present embodiment, the second reforming apparatus 310 performs the reforming reaction using the heat generated in the second heating apparatus 320. However, the present invention is not limited to this, The apparatus 310 may be configured to receive the reaction generation heat generated in the first reformer 220 of the first fuel reformer 200 and to heat the reformer to a temperature required for the reforming reaction.

Meanwhile, the power generation unit 400 may be supplied with the reformed gas containing hydrogen by being reformed in the first fuel reforming unit 200. In addition, it may include at least one fuel cell 410 which is reformed in the first fuel reforming unit 200 and can generate electric power using a reformed gas containing hydrogen. For example, the power generation unit 400 may have a structure in which at least one fuel cell 410 is continuously stacked.

Specifically, the fuel cell 410 may include a first separator 412, a membrane-electrode assembly 414, and a second separator 416.

The first separator 412 has a rectangular plate shape and can be disposed on the cathode electrode side of the membrane electrode assembly 414. [ Also, although not shown in FIG. 5, air supplied by a separate air supply device such as an air pump or the like may be transmitted to the membrane-electrode assembly 414 through the first separator 412.

The membrane-electrode assembly 414 is disposed between the first separator 412 and the second separator 416 and has a membrane-electrode assembly 414 in which air (for example, oxygen) and hydrogen An electrochemical reaction may be induced. Electricity can be produced through this electrochemical reaction.

The second separator 416 may have substantially the same shape as the first separator 412 and may be disposed on the anode electrode side of the membrane-electrode assembly 414. In addition, the reformed gas containing hydrogen provided from the first fuel reforming unit 200 can be transferred to the electrode assembly 414 through the second separator 416.

The power generated by the power generation unit 400 may be stored in the power storage unit 500 and at least a portion of the power may be utilized for initial power generation of the power generation unit 400. In addition, at least a part of the high-temperature steam generated in the combustion apparatus such as the boiler installed in the ship may be utilized for the initial start-up of the power generation unit 400.

Therefore, since a separate heating device for initial startup of the power generating section 400 is not required, the configuration of the power supply system can be simplified.

Here, the initial start may mean the time when the power generating unit 400 is started for the first time. However, after the power generating unit 400 normally generates the power and stops generating the power, the power generating unit 400 must be preheated It may also mean time.

The power generated by the power generator 400 may be provided to the first fuel reformer 200 and the second fuel reformer 300 by the power controller 600, respectively. The power may be supplied to a compression motor 125 for driving the compression device 120 of the fuel supply unit 100 and may be provided by loading crude oil or fuel into the storage tank 110 of the fuel supply unit 100 May be provided to the pump 115 for unloading, or may be provided to the engine of the ship.

As described above, the power required for the ship is not generated by using a separate generator, but the evaporation gas generated in the storage tank 110 in the ship is recovered, vapor-liquid separated and reformed so that at least a part of the reformed evaporation gas It is possible to operate the power supply system economically by using the power generation unit 400 as an energy source of the generation unit 400 to generate power.

Hereinafter, the operation and effect of the power supply system 10 for a ship according to the present embodiment having the above-described configuration will be described with reference to Figs. 6 and 7. Fig. FIG. 6 is a flowchart showing a method of supplying power to a ship according to an embodiment of the present invention, and FIG. 7 is a flowchart showing a method of gas-liquid separation of a vaporized gas in a fuel supply unit.

Referring to FIGS. 6 and 7, the evaporation gas generated in the storage tank of the fuel supply unit is compressed and condensed to separate the liquid evaporation gas and the vapor-phase evaporation gas (S10). In this case, the process of compressing and condensing the evaporation gas will be described in detail. The evaporation gas is supplied to the compressor to compress the evaporation gas (S11). Subsequently, the evaporation gas compressed by the compressor is supplied to the condenser to be cooled (S12). Here, the condenser cools the compressed evaporated gas in the compressor using a heat exchange reaction. Finally, the evaporated gas cooled in the condensing device is supplied to the gas-liquid separator to separate the liquid-phase evaporated gas and the vapor-phase evaporated gas (S13).

The liquid-phase evaporation gas of the vaporized gas separated through the above-described processes is supplied to the first fuel reforming unit 200 to reform it into reformed gas containing hydrogen (S20).

Specifically, the first fuel reforming unit 200 generates a reformed gas containing hydrogen through the reaction represented by the following formula (1).

[Chemical Formula 1]

CH ₄ + H ₂ O - > CO + 3H ₂

In addition, the gaseous vaporization gas is supplied to the second fuel reforming unit 300 and reformed into flushing gas (S30). Specifically, in the second fuel reforming unit, ethane (C ₂ H ₆ ), propane (C ₃ H ₈ ), etc. are selectively decomposed and reformed into methane (CH ₄ ).

Further, the hydrogen-containing reformed gas is supplied to the power generation unit to generate electric power (S40). At this time, the power generation unit generates electric power through a reaction as shown in the following formula (2).

(2)

H ₂ + 1 / 2O ₂ + CO _{2 -} > H ₂ O + CO ₂ + Heat

The heat generated in the exothermic reaction is supplied to the first fuel reforming unit 200 and / or the second fuel reforming unit 300 As shown in Fig.

At the same time, the rinsing gas modified by the second fuel reforming unit is supplied to the storage tank (S50).

The method of supplying power to a ship according to an embodiment of the present invention as described above can be utilized as an energy source of a fuel cell and an explosion-proof material of the storage tank by modifying vaporized gas generated in a storage tank after gas- , Even if the fuel cell is mounted on the power supply system of the ship, safe operation can be achieved while reducing operating costs.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element depending on the application field or can combine or substitute the embodiments in a form not clearly disclosed in the embodiments of the present invention, Of the range. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

10: Power supply system of ship 100: Fuel supply part
110: Storage tank 115: Pump
120: compression device 125: compression motor
130: condenser 140: gas-liquid separator
200: first fuel reforming unit 210: steam generating device
220: first reforming device 230: first heating device
300: Second fuel reforming unit 310: Second reforming unit
320: second heating device 330: blowing device
400: electric power generating unit 410: fuel cell
412: first separator 414: membrane-electrode assembly
416: Second separator 500: Power storage unit
600:

Claims (5)

A fuel supply unit including a storage tank in which fuel is stored and compressing and condensing the evaporated gas in which fuel is evaporated in the storage tank to vapor-liquid-separate the evaporated gas in the liquid phase and the evaporated gas in the vapor phase;
A first fuel reforming unit for generating and supplying reformed gas containing hydrogen by supplying the liquid-phase evaporation gas from the fuel supply unit;
A second fuel reforming unit for supplying the gas-phase evaporation gas from the fuel supply unit and reforming the gas to generate a purge gas;
A power generation unit including at least one fuel cell that generates electric power using the reformed gas containing hydrogen; And
And a power storage unit for storing the power generated by the power generation unit. The method according to claim 1,
Wherein the fuel supply unit includes:
A compression device connected to the storage tank for receiving and compressing the evaporative gas;
A condenser connected to the compressor and cooling the evaporated gas compressed by the compressor; And
And a gas-liquid separator connected to the condensing device, for separating the evaporated gas cooled in the condensing device into the liquid-phase evaporated gas and the vapor-phase evaporated gas. The method according to claim 1,
Wherein the first fuel reforming unit comprises:
A water vapor generating device for generating water vapor;
A first reforming device for reacting the water vapor generated in the steam generator and the liquid phase evaporation gas supplied from the fuel supplier to reform the reformed gas containing hydrogen; And
And a first heating device for heating the steam generator and the first reforming device. The method according to claim 1,
Wherein the second fuel reforming unit comprises:
A second reforming device for reforming the gaseous vaporized gas supplied from the fuel supply part with a flushing gas;
A second heating device for heating the second reforming device; And
And a blowing device for supplying the rinse gas modified in the second reforming device to the storage tank. The method according to claim 1,
And a power control unit connected to the power storage unit and controlling the produced power.

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