CN214625114U - Liquid hydrogen fuel cell waste heat recovery system - Google Patents
Liquid hydrogen fuel cell waste heat recovery system Download PDFInfo
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- CN214625114U CN214625114U CN202120834242.6U CN202120834242U CN214625114U CN 214625114 U CN214625114 U CN 214625114U CN 202120834242 U CN202120834242 U CN 202120834242U CN 214625114 U CN214625114 U CN 214625114U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The utility model discloses a liquid hydrogen fuel cell waste heat recovery system, which comprises a fuel cell stack, a heat exchanger, a four-way valve, a cooling fan, a cooling water pump and a hydrogen supply unit, wherein the four-way valve comprises a C inlet, an A outlet, a B outlet and a D outlet; a cooling liquid outlet of the fuel cell stack is connected to an inlet of a four-way valve C, an outlet of the four-way valve A is connected to a cooling liquid inlet of a cooling fan, the cooling liquid outlet of the cooling fan is connected to an inlet of a cooling water pump after being converged with a cooling liquid outlet of a heat exchanger and an outlet of the four-way valve B, an outlet of the cooling water pump is connected with a cooling liquid inlet of the stack, and an outlet of the four-way valve D is connected to a cooling liquid inlet of the heat exchanger to form a circulating pipeline; the heat exchanger is provided in a hydrogen supply unit of the fuel cell stack. The utility model effectively utilizes the heat of the electric pile to heat the liquid hydrogen and assist the vaporization of the liquid hydrogen, and meanwhile, the low-temperature liquid hydrogen can also help the cooling liquid to cool, thus reducing the performance requirement on the cooling fan; the purpose of controlling the recovery of the waste heat of the galvanic pile can be realized only by adjusting the four-way valve.
Description
Technical Field
The utility model belongs to the technical field of fuel cell, especially, relate to a liquid hydrogen fuel cell waste heat recovery system.
Background
Countries around the world are currently working on developing new energy sources with low pollution, such as solar energy, wind energy, etc., but the new energy sources are greatly influenced by the natural environment and cannot provide continuous and stable energy output. The hydrogen is a clean energy carrier, only generates water when generating energy, has no pollution to the environment, is a bridge for connecting renewable energy sources and traditional fossil energy sources, and has great energy strategic significance for the utilization of the hydrogen energy.
When the fuel cell generates electricity, about 50% of energy is converted into heat energy, but the optimal operation temperature of the fuel cell is 60-70 ℃, the current common fuel cell waste heat treatment mode is that the heat energy is directly dissipated through a heat exchanger or a cooling fan, and the utilization rate of the heat energy is extremely low; when the liquid hydrogen is used for the fuel cell, the liquid hydrogen needs to be converted into gaseous hydrogen, and the current common mode is to reduce the pressure or add a temperature raising device, so that the number of parts is increased additionally, and the power consumption is increased.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a liquid hydrogen fuel cell waste heat recovery system, which can effectively utilize the heat of a galvanic pile to heat liquid hydrogen and assist the vaporization of the liquid hydrogen, and meanwhile, the low-temperature liquid hydrogen can also help cooling liquid to reduce the temperature, thereby reducing the performance requirement on a cooling fan; the purpose of controlling the recovery of the waste heat of the galvanic pile can be realized only by adjusting the four-way valve, and the method is simple and efficient.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a liquid hydrogen fuel cell waste heat recovery system comprises a fuel cell stack, a heat exchanger, a four-way valve, a cooling fan, a cooling water pump and a hydrogen supply unit, wherein the four-way valve comprises a C inlet, an A outlet, a B outlet and a D outlet;
a cooling liquid outlet of the fuel cell stack is connected to an inlet of a four-way valve C, an outlet of the four-way valve A is connected to a cooling liquid inlet of a cooling fan, the cooling liquid outlet of the cooling fan is connected to an inlet of a cooling water pump after being converged with a cooling liquid outlet of a heat exchanger and an outlet of the four-way valve B, an outlet of the cooling water pump is connected with a cooling liquid inlet of the stack, and an outlet of the four-way valve D is connected to a cooling liquid inlet of the heat exchanger to form a circulating pipeline; the heat exchanger is provided in a hydrogen supply unit of the fuel cell stack.
Further, the system also comprises a galvanic pile cooling liquid inlet temperature sensor and a galvanic pile cooling liquid outlet temperature sensor; the temperature sensor of the cooling liquid outlet of the galvanic pile is arranged on a pipeline from the cooling liquid outlet of the galvanic pile to the inlet C of the four-way valve; and the temperature sensor of the cooling liquid inlet of the electric pile is arranged on a pipeline from the outlet of the cooling water pump to the cooling liquid inlet of the electric pile.
Further, the system also comprises a main control unit; the galvanic pile cooling liquid inlet temperature sensor and the galvanic pile cooling liquid outlet temperature sensor are electrically connected to the main control unit. The state of the waste heat recovery system can be monitored in real time.
Furthermore, the four-way valve adopts an electric control four-way valve, and the electric control four-way valve is electrically connected with the main control unit. And the automatic regulation of the cooling system is realized through the main control unit.
Further, the hydrogen supply unit comprises a liquid hydrogen storage tank and a regulating valve, an outlet of the liquid hydrogen storage tank is connected with the heat exchanger, and the heat exchanger is connected to a hydrogen inlet of the galvanic pile through the regulating valve.
Furthermore, the hydrogen supply unit further comprises a hydrogen circulating pump and a steam-water separator, a hydrogen outlet of the galvanic pile is connected with the steam-water separator, a gas outlet of the steam-water separator is connected with the hydrogen circulating pump, the hydrogen circulating pump returns the separated hydrogen to a hydrogen inlet of the galvanic pile, and a liquid outlet of the steam-water separator discharges liquid. Improve the utilization rate of hydrogen and save energy.
The beneficial effects of the technical scheme are as follows:
the utility model discloses set up the heat exchanger in the export of hydrogen storage system, and heat exchanger and pile cooling part interconnect, can effectively utilize the pile heat to liquid hydrogen heating, supplementary liquid hydrogen vaporization, microthermal liquid hydrogen also can help the coolant liquid cooling simultaneously, can reduce the performance demand to cooling fan, and can reduce cooling system consumption, noise reduction. The utility model discloses only need control the cross valve and can realize the thermal recovery of galvanic pile and adjust, improve heat utilization efficiency, improve system's operation precision, guarantee galvanic pile operating performance, it is simple high-efficient, great using value has.
Drawings
Fig. 1 is a schematic structural diagram of a waste heat recovery system of a liquid hydrogen fuel cell according to the present invention;
wherein, 1 is the cooling water pump, 2 is the galvanic pile coolant liquid entry temperature sensor, 3 is the fuel cell galvanic pile, 4 is the governing valve, 5 is the heat exchanger, 6 is the liquid hydrogen storage tank, 7 is the hydrogen circulating pump, 8 is catch water, 9 is the galvanic pile coolant liquid export temperature sensor, 10 is the four-way valve, 11 is radiator fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further explained below with reference to the accompanying drawings.
In the present embodiment, referring to fig. 1, a liquid hydrogen fuel cell waste heat recovery system includes a fuel cell stack 3, a heat exchanger 5, a four-way valve 10, a heat dissipation fan 11, a cooling water pump 1, and a hydrogen gas supply unit, where the four-way valve 10 includes an inlet C, an outlet a, an outlet B, and an outlet D;
a cooling liquid outlet of the fuel cell stack 3 is connected to an inlet of a four-way valve 10C, an outlet of the four-way valve 10A is connected to a cooling liquid inlet of a cooling fan 11, a cooling liquid outlet of the cooling fan 11 is converged with a cooling liquid outlet of a heat exchanger 5 and an outlet of a four-way valve 10B and then is connected to an inlet of a cooling water pump 1, an outlet of the cooling water pump 1 is connected to a stack cooling liquid inlet, and an outlet of the four-way valve 10D is connected to a cooling liquid inlet of the heat exchanger 5 to form a circulating pipeline; the heat exchanger 5 is provided in the hydrogen supply unit of the fuel cell stack 3.
As an optimized scheme of the above embodiment, the system further comprises a stack cooling liquid inlet temperature sensor 2 and a stack cooling liquid outlet temperature sensor 9; the temperature sensor 9 for the cooling liquid outlet of the galvanic pile is arranged on a pipeline from the cooling liquid outlet of the galvanic pile to the inlet of the four-way valve 10C; and the temperature sensor 2 at the cooling liquid inlet of the electric pile is arranged on a pipeline from the outlet of the cooling water pump 1 to the cooling liquid inlet of the electric pile.
The system also comprises a main control unit; the stack cooling liquid inlet temperature sensor 2 and the stack cooling liquid outlet temperature sensor 9 are electrically connected to the main control unit. The state of the waste heat recovery system can be monitored in real time.
The four-way valve 10 adopts an electric control four-way valve, and the electric control four-way valve is electrically connected with the main control unit. And the automatic regulation of the cooling system is realized through the main control unit.
As an optimized solution of the above embodiment, the hydrogen supply unit includes a liquid hydrogen storage tank 6 and a regulating valve 4, an outlet of the liquid hydrogen storage tank 6 is connected with a heat exchanger 5, and the heat exchanger 5 is connected to a hydrogen inlet of the cell stack through the regulating valve 4.
The hydrogen supply unit further comprises a hydrogen circulating pump 7 and a steam-water separator 8, a hydrogen outlet of the galvanic pile is connected with the steam-water separator 8, a gas outlet of the steam-water separator 8 is connected with the hydrogen circulating pump 7, the hydrogen circulating pump 7 returns separated hydrogen to a hydrogen inlet of the galvanic pile, and a liquid outlet of the steam-water separator 8 discharges liquid. Improve the utilization rate of hydrogen and save energy.
For better understanding, the utility model discloses, following is to the theory of operation of the utility model make a complete description:
the heat generated by the galvanic pile is taken out through the cooling liquid, and the flow of the cooling liquid is distributed by the four-way valve 10, so that the heat is distributed; wherein, a part of heat is emitted to the air from the outlet of the four-way valve 10A through the heat radiation fan 11; part of heat flows to the cooling water pump 1 from the outlet of the four-way valve 10B and directly returns to the inside of the galvanic pile to assist the galvanic pile to quickly heat up; the other part of heat exchanges heat with the liquid hydrogen pipeline through the heat exchanger 5 from the outlet of the four-way valve 10D; the heat exchanger 5 can reduce the temperature of the cooling liquid by using the low temperature of the liquid hydrogen, and simultaneously heat the liquid hydrogen by using the temperature of the cooling liquid to promote vaporization of the liquid hydrogen.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The liquid hydrogen fuel cell waste heat recovery system is characterized by comprising a fuel cell stack (3), a heat exchanger (5), a four-way valve (10), a cooling fan (11), a cooling water pump (1) and a hydrogen supply unit, wherein the four-way valve (10) comprises a C inlet, an A outlet, a B outlet and a D outlet;
a cooling liquid outlet of the fuel cell stack (3) is connected to an inlet of a four-way valve (10) C, an outlet of the four-way valve (10) A is connected to a cooling liquid inlet of a cooling fan (11), a cooling liquid outlet of the cooling fan (11) is converged with a cooling liquid outlet of a heat exchanger (5) and an outlet of the four-way valve (10) B and then is connected to an inlet of a cooling water pump (1), an outlet of the cooling water pump (1) is connected with a stack cooling liquid inlet, and an outlet of the four-way valve (10) D is connected to a cooling liquid inlet of the heat exchanger (5) to form a circulating pipeline; the heat exchanger (5) is provided in a hydrogen supply unit of the fuel cell stack (3).
2. The liquid hydrogen fuel cell waste heat recovery system according to claim 1, further comprising a stack coolant inlet temperature sensor (2) and a stack coolant outlet temperature sensor (9); the temperature sensor (9) of the cooling liquid outlet of the galvanic pile is arranged on a pipeline from the cooling liquid outlet of the galvanic pile to the inlet C of the four-way valve (10); and the temperature sensor (2) of the cooling liquid inlet of the electric pile is arranged on a pipeline from the outlet of the cooling water pump (1) to the cooling liquid inlet of the electric pile.
3. The liquid hydrogen fuel cell waste heat recovery system of claim 2, further comprising a main control unit; the galvanic pile cooling liquid inlet temperature sensor (2) and the galvanic pile cooling liquid outlet temperature sensor (9) are electrically connected to the main control unit.
4. The liquid hydrogen fuel cell waste heat recovery system of claim 3, wherein the four-way valve (10) is an electrically controlled four-way valve, and the electrically controlled four-way valve is electrically connected with the main control unit.
5. The liquid hydrogen fuel cell waste heat recovery system according to claim 1, wherein the hydrogen supply unit comprises a liquid hydrogen storage tank (6) and a regulating valve (4), an outlet of the liquid hydrogen storage tank (6) is connected with the heat exchanger (5), and the heat exchanger (5) is connected to a hydrogen inlet of the electric pile through the regulating valve (4).
6. The liquid hydrogen fuel cell waste heat recovery system of claim 5, wherein the hydrogen supply unit further comprises a hydrogen circulation pump (7) and a steam-water separator (8), the stack hydrogen outlet is connected with the steam-water separator (8), a gas outlet of the steam-water separator (8) is connected with the hydrogen circulation pump (7), the hydrogen circulation pump (7) returns separated hydrogen to the stack hydrogen inlet, and a liquid outlet of the steam-water separator (8) discharges liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120834242.6U CN214625114U (en) | 2021-04-22 | 2021-04-22 | Liquid hydrogen fuel cell waste heat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120834242.6U CN214625114U (en) | 2021-04-22 | 2021-04-22 | Liquid hydrogen fuel cell waste heat recovery system |
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| CN214625114U true CN214625114U (en) | 2021-11-05 |
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| CN202120834242.6U Active CN214625114U (en) | 2021-04-22 | 2021-04-22 | Liquid hydrogen fuel cell waste heat recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513490A (en) * | 2022-09-27 | 2022-12-23 | 南方电网电力科技股份有限公司 | Residual pressure and waste heat utilization device of hydrogen fuel cell system and control method thereof |
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2021
- 2021-04-22 CN CN202120834242.6U patent/CN214625114U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513490A (en) * | 2022-09-27 | 2022-12-23 | 南方电网电力科技股份有限公司 | Residual pressure and waste heat utilization device of hydrogen fuel cell system and control method thereof |
| CN115513490B (en) * | 2022-09-27 | 2023-10-31 | 南方电网电力科技股份有限公司 | Residual pressure and waste heat utilization device of hydrogen fuel cell system and control method thereof |
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