KR20130100591A - Fuel cell system, cooling method thereof, and vehicle having the fuel cell system - Google Patents

Abstract

PURPOSE: A fuel cell system is provided to have a quick response time by controlling the rear cooling water of a fuel cell which has the highest temperature in a cooling system by a pump with high response rate. CONSTITUTION: A fuel cell system includes a fuel cell module (110) generating current by the electric chemical reaction of hydrogen and oxygen; a first circulation circuit (100) which is connected to the fuel cell module and includes a first circulation pump and heat exchanger in order to control the reaction heat in the fuel cell module; a hydrogen storage part (220) supplying hydrogen to the fuel cell module; and a second circulation circuit which is connected to the hydrogen storage part and includes the heat exchanger and a second circulation pump in order to control the reaction heat in the hydrogen storage part. [Reference numerals] (110) Fuel cell module; (222) Distributer; (AA) Coolant (supply); (BB) Coolant (discharge)

Description

TECHNICAL FIELD [0001] The present invention relates to a fuel cell system, a cooling method thereof, and a fuel cell system having the fuel cell system.

Embodiments of the present invention relate to a fuel cell system, a cooling method thereof, and a vehicle equipped with the fuel cell system. The cooling water temperature at the inlet and the outlet of the fuel cell and at the outlet of the fuel cell are controlled on a closed circuit for using and circulating distilled water for cooling the fuel cell module. And more particularly, to a method and apparatus for actively controlling the operation of the apparatus.

In addition, in the secondary cooling device for cooling the distilled water which is the fuel cell refrigerant, the cooling water, which is a refrigerant, is used to control the hydrogen absorption and discharge in the hydrogen storage / supply device of the fuel cell, and the cooling water inlet temperature of the hydrogen storage / And a method of controlling the same.

Fuel cells generate electricity by the electrochemical reaction of hydrogen and oxygen, which are fuel gases. As a result, they are attracting attention as a next generation power generation device because they do not have a relatively high efficiency and emission of pollutants compared with existing power generation methods. Such a fuel cell generally supplies hydrogen to the fuel electrode, supplies an oxidizing gas containing oxygen to the cathode, and electrons move through the electrolyte membrane to obtain electricity. At this time, reaction heat is generated in the fuel cell due to exothermic reaction.

The temperature of the fuel cell module may be increased by the amount of generated heat, and the performance of the fuel cell may deteriorate due to deterioration of the fuel cell. In particular, the PEM (Proton Exchange Membrane) type fuel cell, which is applied to a small to medium-sized fuel cell, has an operating temperature of about 60 ° C to 80 ° C, cooling and discharging heat to maintain fuel cell efficiency and stability, There is a demand for a cooling device for temperature control that recovers heat or supplies heat at startup.

The fuel cell cooling apparatus includes an air cooling type cooling device or a water cooling type cooling device for cooling the heat generated in the fuel cell module by supplying cooling water.

In this case, however, since the generated heat generated from the fuel cell module can not be actively controlled, there is a problem that it is difficult to effectively cope with the temperature change due to the load fluctuation of the fuel cell. Further, in the case of a system equipped with a heat exchanger for cooling the cooling water, it is difficult to drive the cooling system stably when the performance of the heat exchanger deteriorates. Therefore, in order to stably drive the fuel cell, a cooling device capable of effectively coping with the temperature change of the fuel cell module is required.

Meanwhile, in order to continuously supply hydrogen as a reactant to the fuel cell module, a hydrogen supply device is required. In order to replace the high-pressure hydrogen storage tank, a liquid hydrogen storage device or a hydrogen storage cylinder using a hydrogen storage alloy is considered. It is pointed out that the efficiency is low and the evaporation at a very low temperature is low. On the other hand, in the case of a hydrogen storage device using a hydrogen storage alloy, hydrogen can be stored and discharged reversibly, and hydrogen can be stored at a density higher than that of a liquid hydrogen, so that the storage efficiency is high. It is known.

However, in this hydrogen storage cylinder, an exothermic reaction takes place when a hydrogen storage alloy absorbs and stores hydrogen, and an endothermic reaction occurs when hydrogen is released. Accordingly, in the hydrogen storage cylinder using the hydrogen storage alloy, the temperature during the hydrogenation reaction increases and the temperature during the dehydrogenation reaction falls. On the other hand, since the equilibrium pressure of hydrogen is sensitive to temperature, the temperature change during the hydrogenation and the dehydrogenation reaction causes a problem that the time required for hydrogen storage increases or the amount of hydrogen emission decreases. Therefore, in a hydrogen storage system using a hydrogen storage alloy, a cooling device capable of effectively controlling a reaction heat is required.

In the conventional co-cooling or water cooling method, the cool air is sent to the fuel cell module or the cooling water is introduced to control the temperature of the fuel cell module. Therefore, the fuel cell module can not always be maintained at a constant temperature, There was a problem of deterioration.

Also, it has been pointed out that the cooling water used for cooling the fuel cell is drained to waste the cooling water.

Particularly, the conventional fuel cell cooling system control method is not a method for actively controlling generation heat generated from the fuel cell module, but is set to a specific temperature value. Therefore, when the load amount fluctuates, Disadvantages are pointed out.

Further, when a system for controlling the flow rate through the heat exchanger in the water-cooled cooling system is used, there is a problem that it is difficult to drive the cooling system stably when the performance of the heat exchanger deteriorates. SUMMARY OF THE INVENTION It is an object of the present invention to provide a cooling control device and a cooling control method for solving the above-mentioned problems that are pointed out in the conventional fuel cell water cooling type cooling system.

According to an aspect of the present invention, there is provided a fuel cell system including: a fuel cell module for generating a current by an electrochemical reaction between hydrogen and oxygen; A first circulation circuit connected to the fuel cell module including a heat exchanger and a first circulation pump so as to control the temperature of the hydrogen storage unit and a hydrogen storage unit configured to supply hydrogen to the fuel cell module, And a second circulation circuit having the heat exchanger and the second circulation pump and connected to the hydrogen storage unit.

According to one example of the present invention, the hydrogen storage unit may include a metal alloy for hydrogen storage.

According to an embodiment of the present invention, the first circulation circuit includes a first inlet through which the first fluid is supplied to control the reaction heat of the fuel cell module, and a second inlet through which the first fluid is discharged from the fuel cell module And a first line connected to the first line and a second line connected to the second line so as to control a flow rate of the first fluid flowing from the first outlet to the first line and the second line and the first inlet, And a flow rate regulator.

According to an example of the present invention, the heat exchanger may be disposed in the first line.

According to an example of the present invention, the first inlet unit further includes a first sensor unit configured to measure a temperature of a first fluid supplied to the fuel cell module, The fuel cell module may be electrically connected to the first flow rate control unit so that the flow rate of the fuel supplied to the fuel cell module can be adjusted.

According to an embodiment of the present invention, the first flow rate regulating unit includes a three-way regulating valve, and the flow rate can be controlled by controlling opening and closing rates and opening rates of the three-way regulating valves.

According to an embodiment of the present invention, the first outlet unit further includes a second sensor unit configured to measure a temperature of a first fluid discharged from the fuel cell module, The first circulation pump can be electrically connected to the fuel cell module so that the flow rate of the fuel supplied to the fuel cell module can be adjusted.

According to an embodiment of the present invention, the second circulation pump is disposed between the second fluid reservoir and the heat exchanger so as to control the flow rate of the second fluid supplied to the heat exchanger, A second fluid regulator may be disposed between the second circulation pump to discharge the second fluid to the second fluid reservoir or to circulate the second fluid to the second circulation pump.

According to an embodiment of the present invention, the apparatus further includes a third sensor unit configured to measure a temperature of a second fluid supplied from the heat exchanger to the hydrogen storage unit, wherein the third sensor unit measures the temperature And a control unit for controlling the flow rate of the second fluid supplied to the heat exchanging unit and the flow rate of the second fluid discharged to the second fluid storing unit through the signal distributor, Respectively.

In order to achieve the above object, the present invention provides a fuel cell system including a first sensor unit formed at a first inlet of a fuel cell module, the first sensor unit measuring a first temperature of a first fluid supplied to the fuel cell module, The first flow rate regulating portion may be opened or closed for each line of the three-way regulating valve with respect to the first line connected to the fuel cell module through the heat exchanger and the second line directly connected to the fuel cell module, Measuring a second temperature of the first fluid discharged from the fuel cell module by a second sensor unit formed at a first outlet portion of the fuel cell module; And controlling the flow rate of the first fluid supplied to the fuel cell module by controlling the number of revolutions of the first circulation pump.

According to an embodiment of the present invention, a third sensor unit formed at a second inlet of a hydrogen storage unit for supplying hydrogen to the fuel cell module is provided with a third temperature of a second fluid flowing from the heat exchanger to the hydrogen storage unit, And controlling the flow rate of the second fluid flowing into the heat exchanger or discharged to the second fluid reservoir based on the measured temperature and the measured third temperature.

In order to achieve the above object, the present invention also provides a fuel cell system including a main body including an engine portion and a steering device, and a fuel cell system for transmitting power to the engine portion, A first circulation circuit including a heat exchanger and a first circulation pump connected to the fuel cell module so as to control reaction heat in the fuel cell module; And a second circulation circuit including the heat exchanger and the second circulation pump, the second circulation circuit being connected to the hydrogen storage unit so as to control the temperature in the hydrogen storage unit. do.

The fuel cell system according to at least one embodiment of the present invention configured as described above, the cooling method thereof, and the moving body including the fuel cell system are configured such that the fuel cell rear end cooling water, which is the highest temperature in the cooling system, So that it can have a quick response characteristic. Therefore, in the present invention, stable operation of the cooling system can be achieved even when a temperature change occurs due to a change in operation load of the fuel cell.

Also, according to an embodiment of the present invention, stable operation of the fuel cell module cooling system can be expected even when the performance of the heat exchanger for heat exchange of the coolant is deteriorated.

According to an embodiment of the present invention, it is possible to actively control the temperature of the fuel cell cooling system and effectively use the heat generated by the reaction of the fuel cell.

1 is a configuration diagram of a fuel cell system according to an embodiment of the present invention;
2 is a conceptual diagram showing the first circulation circuit of Fig.
3 is a conceptual diagram showing the temperature control method of the first inlet portion in the conceptual view shown in Fig.
4 is a conceptual diagram showing the temperature control method of the first outlet portion in the conceptual view shown in Fig. 2;
5 is a conceptual diagram showing the second circulation circuit of Fig.
6 and 7 are flowcharts illustrating a cooling method of a fuel cell system according to an embodiment of the present invention.
FIG. 8 and FIG. 9 are conceptual diagrams of an underwater and a water mover according to an embodiment of the present invention; FIG.

Hereinafter, a fuel cell system, a cooling method thereof, and a vehicle equipped with the fuel cell system according to an embodiment of the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a configuration diagram of a fuel cell system according to an embodiment of the present invention. As shown, the fuel cell system includes a fuel cell module 110, a first circulation circuit 100, a hydrogen storage unit 220, and a second circulation circuit 200.

The fuel cell module 110 includes, for example, a fuel supply unit for supplying a predetermined amount of fuel, a reformer unit for generating a byproduct containing hydrogen gas and heat by receiving the fuel of the fuel supply unit, And a stack portion for generating electricity and heat by an electrochemical reaction of oxygen supplied separately.

The reformer unit may include a reactor and a burner therein. The stack unit may include a plurality of unit cells, each unit cell including a fuel electrode, an electrolyte membrane, and an air electrode.

The hydrogen storage part 220 is formed to supply hydrogen to the fuel supply part and may include a metal alloy for hydrogen storage. In the case of a hydrogen storage device using a hydrogen storage alloy, hydrogen can be stored and discharged reversibly, and hydrogen can be stored at a density higher than that of a liquid hydrogen, so that the storage efficiency is high and the stability is higher than other methods.

The first circulation circuit 100 is connected to the fuel cell module 110 including the heat exchanger 120 and the first circulation pump 140 so as to control the reaction heat in the fuel cell module 110.

Further, the first circulation circuit 100 is a closed circuit, and it is required to compensate for the volumetric expansion of the closed circuit generated during operation. Accordingly, the volume expansion compensation tank 150 is disposed on the path connecting the first circulation pump 140 and the fuel cell module 110, so that the volume can be compensated.

The second circulation circuit 200 includes a heat exchanger 120 and a second circulation pump 240 so as to control the temperature in the hydrogen storage unit 220 and is connected to the hydrogen storage unit 220.

FIG. 2 is a conceptual diagram showing the first circulation circuit 100 of FIG. 1, FIG. 3 is a conceptual diagram of a temperature control method of the first inlet 111 in the conceptual view of FIG. 2, 2 is a conceptual diagram showing a temperature control method of the first outlet portion 112. In FIG.

The first circulation circuit 100 is formed so as to control the reaction heat of the fuel cell module 110, that is, to control the temperature in the fuel cell module 110.

The first circulation circuit 100 includes a first inlet 111 through which the first fluid is supplied, a first outlet 112 through which the first fluid is discharged from the fuel cell module 110, (A) and the second line B (B) so as to adjust the flow rate of the first fluid flowing from the first line (A) to the second line (B) and the first inlet (111) The first flow rate regulator 130 is connected to the first flow rate regulator 130.

The first inlet portion 111 may include the first sensor unit 113 as an inlet through which the first fluid (for example, distilled water) flows into the fuel cell module 110. The first sensor unit 113 measures the temperature of the first fluid flowing into the first inlet 111.

The first outlet portion 112 may be formed to include the second sensor unit 114 as an outlet through which the first fluid discharged from the fuel cell module 110 is discharged. The second sensor unit (114) measures the temperature of the first fluid flowing into the first outlet (112).

A line extending from the fuel cell module 110 through the first outlet portion 112 to the first flow rate regulator 130 may be formed to include the first line A and the second line B have. Here, the heat exchanger 120 may be disposed on the first line (A).

The first line A and the second line B are connected to the first flow rate regulator 130. The first flow rate regulator 130 includes a three-way regulating valve 131 can do.

The first line A and the second line B are connected to the three-way regulating valve 131 and the three-way regulating valve 131, which is not connected to the first line A and the second line B, One end of which is connected to the first inlet 111. A line from the three-way valve 131 to the first inlet 111 is referred to as a third line C.

A first circulation pump 140 is disposed between the first inlet portion 111 and the three-way regulating valve 131.

Referring to FIG. 3, the temperature control method of the first inlet 111 will be described below.

The first sensor unit 113 measures the temperature of the first fluid flowing into the first inlet 111 and transmits an electric signal to the first flow controller 130.

When the measured temperature is higher than the preset temperature, the first flow rate regulator 130 adjusts the valve of the three-way regulator valve 131 so that the flow rate of the fuel from the first line (A) 3 line C of the first fluid.

At this time, the valve can be closed so that the first fluid does not flow from the second line (B) to the third line (C), or the flow rate can be reduced by adjusting the opening ratio (degree of opening or closing) of the valve.

If the measured temperature is lower than the set temperature, the operation can be reversed.

Referring to FIG. 4, the temperature control method of the first outlet 112 will be described below.

The second sensor unit 114 measures the temperature of the first fluid discharged to the first outlet portion 112 to regulate the operation of the first circulation pump 140. That is, when the temperature of the first fluid discharged to the first outlet portion 112 is lower than the set value, the flow rate is reduced by reducing the rotational speed of the pump, and conversely, when the temperature is higher than the set value, .

The temperature in the fuel cell module 110 can be stabilized by using the first sensor unit 113 and the second sensor unit 114, the first flow rate control unit 130, and the first circulation pump 140, Can be adjusted.

5 is a conceptual diagram showing the second circulation circuit 200 of FIG.

The second circulation circuit 200 forms a path from the second fluid reservoir 210 to the second fluid reservoir 210 through the heat exchanger 120 and the hydrogen reservoir 220.

A second circulation pump 240 is disposed in a path connecting the second fluid storage part 210 and the heat exchanger 120 so as to control the flow rate of the second fluid supplied to the heat exchanger 120.

The second fluid may be discharged to the second fluid storage part 210 between the hydrogen storage part 220 and the second circulation pump 240 or the second fluid may be circulated to the second circulation pump 240 A second flow rate regulator 230 is disposed.

The third sensor unit 221 is disposed to measure the temperature of the second fluid supplied from the heat exchanger 120 to the hydrogen storage unit 220. The third sensor unit 221 measures the temperature The second circulation pump 240 is connected to the second fluid storage part 210 through the signal distributor 222 so as to adjust the flow rate of the second fluid supplied to the heat exchange part or to control the flow rate of the second fluid discharged to the second fluid storage part 210, And the second flow rate regulator 230, respectively.

The third sensor unit 221 operates in a manner similar to the first sensor unit 113 and the second sensor unit 114. That is, the temperature is measured, the measured signal is converted and transmitted to the signal distributor 222, and the signal distributor transmits the control signal to each of the second flow controller 230 and the second circulation pump 240.

The second circulation pump 240 regulates the flow rate of the second fluid flowing into the hydrogen storage unit 220 from the second fluid storage unit 210. The second circulation pump 240 thus passes through the heat exchanger 120, The second fluid is heated to be supplied to the hydrogen storage unit 220 by the amount of heat required by the second heat exchanger 220.

The second circulation pump 240 adjusts the pump rotation speed by the motor control according to the frequency signal received from the signal distributor to adjust the flow rate of the second fluid to the heat exchanger 120.

That is, when the temperature of the hydrogen storage unit 220 is lower than the predetermined temperature, the rotational speed of the second circulation pump 240 is increased to allow the second fluid to flow into the heat exchanger 120, In this case, the rotational speed of the pump is reduced to introduce a small amount of circulating water.

The second flow regulator 230 discharges the second fluid flowing from the hydrogen storage unit 220 to the outside or circulates it into the circuit by a control signal transmitted from the signal distributor.

As described above, according to the present invention, the set temperatures of the fuel cell module 110 and the hydrogen storage unit 220 are compared with the actual measured temperatures through the first to third sensor units 113, 114, and 221, The control signals can be transmitted to the circulation pumps 140 and 240 and the three-way regulating valves 131 and 231, respectively, or simultaneously.

That is, in the first circulation circuit 100, the flow rate of the fluid passing through the heat exchanger 120 and the flow rate of the first fluid flowing into the fuel cell module 110 can be actively controlled, and the second circulation circuit 200 Controls the flow rate of the second fluid flowing into the heat exchanger 120 to control the temperature of the second fluid flowing into the hydrogen storage unit 220 and controls the temperature of the second fluid through the three- The flow rate of the discharged or circulated fluid can be adjusted, so that the set temperature of the hydrogen storage unit 220 can be actively controlled.

In addition, such a control method uses a variable speed pump, so that it is possible to perform a rapid temperature control and to control the set temperature of the hydrogen storage unit 220 to be satisfied through the flow rate control even when the performance of the heat exchanger 120 is deteriorated.

As such, the hydrogen storage unit 220 does not require a separate temperature control device for storing hydrogen.

The hydrogen storage unit 220 can be controlled at a constant temperature by using the second fluid which has been heated by the dehydrogenation reaction for operating the fuel cell without having a separate cooling device. That is, temperature control for hydrogen storage is possible by using the second circulation pump 240 and the second flow rate controller 230.

6 and 7 are flowcharts illustrating a cooling method of the fuel cell system according to an embodiment of the present invention.

As shown in the figure, the cooling method of the fuel cell system includes a first sensor unit 113 formed on the first inlet 111 of the fuel cell module 110 and a second sensor unit 113 formed on the first inlet 111 of the fuel cell module 110, A first line (A) passing through the heat exchanger (120) from the fuel cell module (110) based on the first temperature measured, and a second line The first flow rate regulator 130 regulates the opening or closing rate of each line of the three-way regulating valve with respect to the second line B directly connected to the fuel cell module 110, Measuring the second temperature of the first fluid discharged from the fuel cell module (110) by the second sensor unit (114) formed in the first outlet portion (112) 1 circulation pump 140 to control the flow rate of the first fluid supplied to the fuel cell module 110 .

The third sensor unit formed at the second inlet of the hydrogen storage unit 220 for supplying hydrogen to the fuel cell module 110 is connected to the hydrogen storage unit 220 through the heat exchanger 120. 2 fluid and a flow rate of a second fluid flowing into the heat exchanger 120 or discharged into the second fluid reservoir 210 is controlled based on the measured third temperature As shown in FIG.

The description of each of the above steps will be omitted because it is the same as or similar to the operation of each of the configurations described above with reference to Figs. 1 to 5 above.

8 and 9 are conceptual diagrams of an aquatic and aquamarine movement related to an embodiment of the present invention. Here, the moving bodies 300 and 400 may be, for example, a submarine 300 or a ship 400 that moves with a torpedo, an underwater or an aquifer with an engine and a power supply.

These motors 300 and 400 are required to supply power to the motors of the engines 310 and 410. [ As such a power supply device, the fuel cell system 320 or 420 described above can be mounted to supply power to the motor. The reference numerals are the steering devices 330 and 430.

The above-described fuel cell system, the cooling method thereof, and the moving body having the fuel cell system are not limited in the configuration and the method of the above-described embodiments, but the embodiments can be applied to various embodiments All or some of the embodiments may be selectively combined.

Claims (12)

A fuel cell module that generates current by an electrochemical reaction between hydrogen and oxygen;
A first circulation circuit including a heat exchanger and a first circulation pump and connected to the fuel cell module so as to control reaction heat in the fuel cell module;
A hydrogen storage unit configured to supply hydrogen to the fuel cell module; And
And a second circulation circuit including the heat exchanger and a second circulation pump so as to control the temperature in the hydrogen storage, and connected to the hydrogen storage. The method of claim 1,
The hydrogen storage unit includes:
A fuel cell system comprising a hydrogen storage alloy (Metallic alloy for hydrogen storage). The method of claim 1,
The first circulation circuit includes:
A first inlet through which a first fluid is supplied to control the reaction heat of the fuel cell module;
A first outlet portion through which the first fluid is discharged from the fuel cell module;
A first line and a second line branching from the first outlet portion; And
And a first flow rate regulator connected to the first line and the second line to adjust a flow rate of the first fluid toward the first inlet. The method of claim 3,
And the heat exchanger is disposed in the first line. The method of claim 3,
Wherein the first inlet further comprises a first sensor unit configured to measure a temperature of a first fluid supplied to the fuel cell module,
Wherein the first flow rate regulator further comprises a three-way regulating valve,
Wherein the first sensor unit is electrically connected to the first flow rate regulator so as to control a flow rate of the fuel supplied to the fuel cell module based on the measured temperature. The method of claim 5,
Wherein the flow rate control is performed by controlling opening and closing rates and opening rates of the three-way control valve in each direction. The method of claim 3,
The first outlet portion
Further comprising a second sensor unit configured to measure a temperature of the first fluid discharged from the fuel cell module,
Wherein the second sensor unit is electrically connected to the first circulation pump so as to adjust the flow rate of the fuel supplied to the fuel cell module based on the measured temperature. The method of claim 1,
The second circulation pump
A second fluid reservoir disposed between the second fluid reservoir and the heat exchanger for controlling a flow rate of the second fluid supplied to the heat exchanger,
And a second flow rate regulating unit disposed between the hydrogen storage unit and the second circulation pump to discharge the second fluid to the second fluid reservoir or to circulate the second fluid to the second circulation pump . 9. The method of claim 8,
Further comprising a third sensor unit configured to measure a temperature of a second fluid supplied from the heat exchanger to the hydrogen storage unit,
The third sensor unit passes through the signal distributor so as to adjust the flow rate of the second fluid supplied to the heat exchange part or the flow rate of the second fluid discharged to the second fluid storage part based on the measured temperature. 2 is a fuel cell system, characterized in that electrically connected to the circulation pump and the second flow control unit. Measuring a first temperature of a first fluid supplied to the fuel cell module by a first sensor unit formed at a first inlet of the fuel cell module;
The first flow rate adjusting section is connected to the first line connected to the fuel cell module through the heat exchanger and the first line connected directly to the fuel cell module based on the measured first temperature, Adjusting the opening / closing rate or the opening rate of the door to the open / closed state;
Measuring a second temperature of the first fluid discharged from the fuel cell module by a second sensor unit formed at a first outlet of the fuel cell module;
And controlling the flow rate of the first fluid supplied to the fuel cell module by controlling the rotation number of the first circulation pump based on the measured second temperature. The method of claim 10,
Measuring a third temperature of a second fluid flowing from the heat exchanger to the hydrogen storage unit, the third sensor unit being formed at a second inlet of the hydrogen storage unit for supplying hydrogen to the fuel cell module; And
And controlling the flow rate of the second fluid flowing into the heat exchanger or discharged to the second fluid storage unit based on the measured third temperature. A main body including an engine portion and a steering device; And
And a fuel cell system for transmitting power to the engine section,
The fuel cell system,
A fuel cell module that generates current by an electrochemical reaction between hydrogen and oxygen;
A first circulation circuit including a heat exchanger and a first circulation pump and connected to the fuel cell module so as to control reaction heat in the fuel cell module;
A hydrogen storage unit configured to supply hydrogen to the fuel cell module; And
And a second circulation circuit including the heat exchanger and a second circulation pump so as to control the temperature in the hydrogen storage, and connected to the hydrogen storage.

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