KR20110048214A - The electric power generator with both fuel-cell and gas fuel engine - Google Patents

Abstract

PURPOSE: A power generating equipment for ship, using fuel cell with gas internal combustion engine, is provided to improve the efficiency of a generating device by being applied to a mixing system, which uses fuel battery, for basis electric power. CONSTITUTION: A power generating equipment for ship comprise an internal combustion engine(120), a fuel battery(130), an electric power distributor(140), a steam electrolysis device(160) and a hydrogen storage tank(180). The internal combustion engine uses the gas as fuel and produces the electricity for the propulsion and additional drive of the ship. The fuel battery produces the base electricity of a ship. The electric power distributor controls the electricity, produced in the internal combustion engine and fuel battery. The steam electrolysis device supplies high temperature steam, which is the by-product of the fuel battery, to a steam using member(190). The hydrogen storage tank stores the hydrogen, produced from the steam electrolysis device, and supplies the saved hydrogen as the fuel of the fuel battery.

Description

Ship power generation equipment using fuel cell and gas internal combustion engine {THE ELECTRIC POWER GENERATOR WITH BOTH FUEL-CELL AND GAS FUEL ENGINE}

The present invention relates to a ship power generation equipment using a fuel cell and a gas internal combustion engine, and more particularly, to a power generation and a fuel cell using an internal combustion engine using gaseous fuel to produce a propulsion of the ship and the power required in the ship. Power generation is used in a mixed manner, and the amount of power generated from these is used in ship power generation equipment that uses fuel cell and gas internal combustion engine that can secure additional fuel of fuel cell through electrolysis using surplus power except power required in ship. It is about.

As for traditional power sources that depend on the environment, the search for alternative means of power generation is becoming very important. In particular, the environmental and political issues involved in combustion-based energy systems cannot be ignored. In an effort to reduce the dependence on this type of power source and power generation methods, research has been increasing on devices capable of generating electricity by consuming fuel without using combustion.

As is well known, many types of electric vehicles can be included as an alternative to automobiles powered by internal combustion engines. In recent years, the use of fuel cells to propel large vessels is increasing. In addition, research has been conducted for more efficient use.

Among the fuel cells that have been studied, the solid oxide fuel cell (SOFC), called the third generation fuel cell, was first operated by Bauer and Preis in 1937 as a fuel cell that uses a solid oxide with oxygen or hydrogen ion conductivity as an electrolyte. .

Solid oxide fuel cells operate at the highest temperatures (700-1000 ° C) of existing fuel cells, and are simpler in structure than other fuel cells because all the components are solid, and the loss of electrolytes, replenishment and corrosion There is no problem, no noble metal catalysts and easy fuel supply through direct internal reforming. In addition, it has the advantage that thermal combined cycle power generation using waste heat is possible because the high-temperature gas is discharged. Because of these advantages, research on solid oxide fuel cells has been actively conducted in advanced countries such as the United States and Japan, aiming to commercialize in the early 21st century.

In particular, solid oxide fuel cells are the most efficient and have the lowest pollution among fuel cells, and because they operate at 700 ~ 1000 ℃, they can directly use natural gas, coal gas, etc. Combined with the MW-class capacity of the combined power generation, it is possible to obtain 70% electrical efficiency.

However, in the conventional system using a fuel cell, there is a limit to using a heat source appearing in the operation of the fuel cell as another energy source. In order to increase the efficiency of such conventional systems, a method of storing the surplus power produced in a secondary battery and using this energy when necessary is mainly used. In addition, when the secondary battery is full, a method of utilizing the remaining surplus power in another system is being sought. However, in the current technology, there is a problem that a certain system is excessively operated in order to consume the remaining power. In addition, the problem of discharging the generated power may occur.

Moreover, current fuel cells have limitations to be applied to large ships due to problems of power generation capacity, volume, weight, etc., and thus they are mostly applied only to small ships for inland transportation.

Therefore, the present invention has been invented to solve the above problems, the purpose of which is to use a fuel cell as a device for producing the base power of a large vessel, the large-capacity power required in the operation of using gas as fuel It uses a mixture of internal combustion engines and produces hydrogen, the fuel of the fuel cell, by using surplus power among the power generated by the two generators, and stores it and uses it as fuel of the fuel cell. It is to provide a marine power generation equipment using a fuel cell and a gas internal combustion engine that will be increased.

In order to achieve the above object, according to the present invention, an internal combustion engine using gas as a fuel to produce the power required for the propulsion and additional operation of the vessel, a fuel cell installed to produce the base power of the vessel, and internal combustion A power divider that regulates the supply of power from engines and fuel cells to power-use equipment, and produces hydrogen with surplus power supplied through the power divider, and hot steam, a byproduct of the fuel cell, to the steam-use equipment. Provided is a ship power generation equipment using a fuel cell and a gas internal combustion engine including a steam electrolysis device and a hydrogen storage tank for storing hydrogen produced from the steam electrolysis device and supplying stored hydrogen as fuel of a fuel cell.

And the rear end of the internal combustion engine and the fuel cell is a gas fuel tank is installed to supply the same gas fuel, the gas fuel supplied from the gas fuel tank can be adjusted to be distributed and supplied to the internal combustion engine and the fuel cell.

In addition, the fuel distributor may adjust the operation of the internal combustion engine and the fuel cell according to the gas fuel supply ratio according to the load demand of the power generation in the vessel.

In addition, a converter is installed between the fuel cell and the power divider to convert the power of the fuel cell generated by direct current into alternating current.

In addition, the power-use device may include any one of the ship propulsion motor, residential power, engine room, equipment installed in the equipment room.

Hydrogen produced from the steam electrolysis unit may be stored in the hydrogen storage tank by increasing the pressure to a certain pressure in the compressor, and the fuel distributor stops the supply of gas fuel to the fuel cell according to the filling degree of the hydrogen storage tank and Hydrogen from the storage tank can be supplied to the fuel cell.

Here, the steam using apparatus may be HVAC equipment including a heater and an absorption refrigerator.

According to the ship power generation equipment using the fuel cell and the gas internal combustion engine of the present invention, the internal combustion engine is used to generate a large amount of electric power according to the high power required in the thrust of a large ship, and the base power continuously required by the ship is fueled. By adopting a hybrid system using a battery, the efficiency of the power generator is increased, and hydrogen is produced using the surplus power generated by the two power generators, and the fuel is stored and used again as a fuel for the fuel cell. It has the effect of saving.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a ship power generation equipment mixed with a fuel cell and a gas internal combustion engine according to an embodiment of the present invention.

As shown in FIG. 1, a ship power generation equipment using a fuel cell and a gas internal combustion engine according to an embodiment of the present invention includes an internal combustion engine 120 used as a mixed power generation equipment of a ship (not shown), and fuel. The battery 130 and the power distributor 140 for distributing the power produced by the internal combustion engine 120 and the fuel cell 130, the steam electrolysis device 160 for supplying steam and producing hydrogen, and the produced hydrogen It may include a hydrogen storage tank 180 for storing the.

Here, several tens of megawatts or more of power is required for the propulsion driving of the electric motor installed for the propulsion of the ship, and an internal combustion engine 120 using gaseous fuel may be installed to produce the electric power.

Moreover, in the case of the internal combustion engine 120 using gaseous fuel, the amount of pollutants released is significantly smaller than that of a ship using oil in general, which may have advantages in environmental problems.

The internal combustion engine 120 may be installed in pairs of about 2 to 4 trillion in pairs with the generator.

In addition, the fuel cell 130 installed to produce the base power in the vessel may be a molten carbonate fuel cell or a solid oxide fuel cell, and these fuel cells have a higher internal operating temperature than the conventional polymer electrolyte fuel cell, resulting in improved internal reforming. It is possible to take advantage of the high temperature steam discharged during power generation. In addition, continuous power generation has characteristics suitable for power generation, and in the case of large ships, since a certain amount of continuous power consumption is generated, a certain amount or more of base power may be required.

The gaseous fuel tank 100 is installed at the rear end of the internal combustion engine 120 and the fuel cell 130 to supply gaseous fuel to the internal combustion engine 120 and the fuel cell 130 using the same fuel. A fuel distributor 110 may be installed between the gas fuel tank 100, the internal combustion engine 120, and the fuel cell 130.

The fuel distributor 110 may adjust the operation of the internal combustion engine 120 and the fuel cell 130 according to the supply ratio of the gas fuel to the gas fuel supplied from the gas fuel tank 100 in accordance with the required amount of load in the vessel. have.

The fuel distributor 110 may be an automatic control valve capable of adjusting the supply ratio, which may be electrically controlled through a control unit (not shown).

In addition, the power distributor 140 may be installed to control the power produced by the internal combustion engine 120 and the fuel cell 130 to supply the power using device 150.

The power distributor 140 supplies most of the power to the power using device 150, and the surplus power remaining after the supply is sent to the steam electrolysis device 160.

In addition, the power using device 150 may include any one or more of the vessel propulsion motor, residential power used, engine room, equipment mounted in the equipment room. In addition, before supplying the electric power produced by the fuel cell 130, a converter 132 is installed between the fuel cell 130 and the power distributor 140 to convert the power of the fuel cell 130 generated by direct current into an alternating current. The conversion is supplied to the power splitter 140.

On the other hand, in the steam electrolysis device 160 to produce hydrogen using the surplus power supplied through the power splitter 140, using a steam which is a by-product of the fuel cell 130, a steam-using device is required Supply to 190.

That is, in the steam electrolysis device 160, when surplus power is supplied from the power divider 140, hydrogen is generated by electrolyzing high-temperature steam supplied from the fuel cell 130 using surplus power. In the case of electrolyzing high temperature steam, it may be possible to use energy lower than that used to electrolyze low temperature water. And when there is no surplus power is supplied directly to the steam using apparatus 190, the high temperature steam.

The steam using device 190 may include any one or more of HVAC equipment, such as a heater, absorption chiller.

A compressor 170 and a hydrogen storage tank 180 may be installed at a rear end of the steam electrolysis device 160.

Compressor 170 is to increase the hydrogen produced from the steam electrolysis device 160 to a predetermined pressure to be stored in the hydrogen storage tank 180, the hydrogen storage tank 180 is the steam electrolysis device 160 Hydrogen produced from the gas may be stored and the stored hydrogen may be supplied as a fuel of the fuel cell 130.

Referring to the operation of the marine power generation equipment using a fuel cell and a gas internal combustion engine according to the present invention having such a configuration as follows.

Referring to FIG. 1 again, the gas fuel supplied from the gas fuel tank 100 is supplied to the internal combustion engine 120 and the fuel cell 130 at an appropriate ratio through the fuel distributor 110.

In general, the internal combustion engine 120 may have a high supply rate of gaseous fuel to produce propulsion power, and may be stopped when propulsion power is not needed. On the other hand, the fuel cell 130 may be supplied with gas fuel in a continuous but low supply ratio in order to continuously produce electromotive force.

Subsequently, the electric power produced by the internal combustion engine 120 which is supplied with the gas fuel is supplied with driving power to most of the power using devices 150 through the power distributor 140, and the electric power produced by the fuel cell 130 is converted into a converter ( In operation 132, the DC power is converted into AC to supply power to the power using device 150 using the power divider 140.

At this time, the surplus power remaining after supplying to the power using device 150 is supplied to the steam electrolysis device 160 to generate hydrogen by electrolyzing high-temperature steam supplied from the fuel cell 130 using the surplus power. The generated hydrogen is increased to a predetermined pressure in the compressor 170 and is sent to the hydrogen storage tank 180.

And when there is no surplus power, the high temperature steam supplied from the fuel cell 130 is directly supplied to the steam using device 190 to be used.

Here, the hydrogen storage tank 180 controls the operation of the steam electrolysis device 160 according to the filling degree, and when fully charged, the supply of gaseous fuel supplied from the fuel distributor 110 to the fuel cell 130 is stopped. Then, the hydrogen of the hydrogen storage tank 180 is supplied to the fuel cell 130 to be used.

Therefore, according to the embodiment of the present invention as described above, the large-capacity power can be used in a large vessel, the internal combustion engine is used, the base power is to increase the efficiency of the power generation apparatus by applying a mixed system using a fuel cell, By using two power generation apparatuses, fuel, hydrogen, is produced, stored, and then used as fuel of a fuel cell to achieve fuel savings.

As described above as a specific embodiment of the ship power generation equipment mixed with a fuel cell and a gas internal combustion engine according to the present invention, this is only an example, the present invention is not limited to this, the broadest in accordance with the basic idea disclosed herein It should be interpreted as having a range. Those skilled in the art can easily change the material, size, etc. of each component according to the application field, and can be combined / substituted the disclosed embodiments to implement a pattern of a timeless shape, but this also does not depart from the scope of the present invention will be. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

1 is a block diagram of a ship power generation equipment mixed with a fuel cell and a gas internal combustion engine according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: gas fuel tank 110: fuel distributor

120: internal combustion engine 130: fuel cell

132 converter 140 power divider

150: power equipment 160: steam electrolysis device

170: compressor 180: hydrogen storage tank

190: Steam equipment

Claims (8)

Internal combustion engines using gas as fuel to produce the power required for propulsion and further operation of the ship; A fuel cell installed to produce base power of the vessel; A power distributor for controlling the power generated by the internal combustion engine and the fuel cell to be supplied to a power using device; A steam electrolysis device for producing hydrogen with surplus power supplied through the power divider, and supplying high-temperature steam which is a by-product of the fuel cell to a steam-use device; Hydrogen storage tank that stores the hydrogen produced from the steam electrolysis device and supplies the stored hydrogen as the fuel of the fuel cell Ship power generation equipment using a fuel cell and a gas internal combustion engine comprising a. The method of claim 1, A gas fuel tank is installed at the rear end of the internal combustion engine and the fuel cell to supply the same gas fuel. And a fuel cell and a gas internal combustion engine having a fuel distributor installed to regulate the gas fuel supplied from the gas fuel tank to be supplied to the internal combustion engine and the fuel cell. The method of claim 2, The fuel distributor is a ship power generation equipment using a fuel cell and a gas internal combustion engine for controlling the operation of the internal combustion engine and the fuel cell according to the supply ratio of the gas fuel in accordance with the required amount of power generation in the vessel. The method of claim 1, And a fuel cell and a gas internal combustion engine having a converter installed between the fuel cell and the power distributor so as to convert electric power of the fuel cell generated by direct current into alternating current. The method of claim 1, The electric power using device, a ship power generation equipment using a fuel cell and a gas internal combustion engine including any one or more of the equipment installed in the ship propulsion motor, residential power, engine room, equipment room. The method of claim 1, Hydrogen produced from the steam electrolysis device is a vessel power generation equipment using a fuel cell and a gas internal combustion engine is stored in the hydrogen storage tank by increasing to a predetermined pressure in the compressor. The method of claim 2, The fuel distributor discontinues the supply of gaseous fuel to the fuel cell according to the filling degree of the hydrogen storage tank, and uses a fuel cell and a gas internal combustion engine that mix the fuel cell and the gas internal combustion engine to supply hydrogen from the hydrogen storage tank to the fuel cell. equipment. The method of claim 1, The steam generator is a ship power generation equipment using a fuel cell and a gas internal combustion engine, characterized in that the HVAC equipment including a heater, absorption chiller.

Images