System and method for gas precooling and cooling in low-temperature starting test of fuel cell
A technology of fuel cells and fuel cell stacks, which is applied to fuel cells, electrical components, circuits, etc., can solve the problem of increasing the refrigeration load of high and low temperature environmental boxes, the gas temperature cannot be reduced to the required temperature, affecting the stack or system shutdown. Purging and other problems to achieve the effect of satisfying large-span range flow, fast and effective cooling effect, and high stability
Pending Publication Date: 2020-08-04
SHANGHAI SHENLI TECH CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the disadvantages of the above-mentioned prior art that the cooling pipeline is too long, so that the gas temperature cannot be lowered to the required temperature in the later period, while increa
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[0042] Example one
[0043] A fuel cell stack with a power of 2kW is subjected to a low temperature start-up test at -20°C. The hydrogen / air flow rate required for the test is 20nlpm / 80nlpm, and the gas temperature must reach -20°C before entering the stack. Through the hydrogen pre-cooling system 3 and the air pre-cooling system 4 of the present invention, the temperature of the gas actually entering the stack is both -20°C.
Example Embodiment
[0044] Example two
[0045] The fuel cell stack with a power of 20kW is subjected to a low temperature start-up test at -20°C. The hydrogen / air flow rate required for the test is 300nlpm / 1200nlpm, and the gas temperature must reach -30°C before entering the stack. Through the hydrogen pre-cooling system 3 and the air pre-cooling system 4 of the present invention, the temperature of the gas actually entering the stack is -30°C.
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The invention relates to a system for carrying out gas precooling and cooling in a low-temperature starting test of a fuel cell. The system comprises a hydrogen pre-cooling system (3) and an air pre-cooling system (4), the hydrogen pre-cooling system (3) and the air pre-cooling system (4) are each provided with a closed environment cabin (7), a finned tube type evaporator (8) and a refrigerating device, the finned tube type evaporator (8) and the refrigerating device are arranged in the closed environment cabin (7). The finned tube evaporator (8) is provided with an air inlet (10) and an air outlet (11), and corresponding air enters the finned tube evaporator (8) from the air inlet (10) and is exhausted from the air outlet (11) after being pre-cooled. Compared with the prior art, the system has the advantages that the length of a gas pipeline is effectively reduced, gas cooling is stably achieved, the device is suitable for testing of different gas temperature requirements, and the requirement for large-span-range flow is met.
Description
technical field [0001] The invention relates to the field of fuel cells, in particular to a system and method for performing gas precooling and cooling in low-temperature start-up tests of fuel cells. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a device that converts hydrogen energy into electrical energy through an electrochemical reaction. It has the advantages of high efficiency, high power density, zero emissions, and low operating temperature. It can be applied to vehicles, mobile power supplies, etc. field. When the proton exchange membrane fuel cell is running, the electrochemical reaction of hydrogen and oxygen produces a large amount of water, which will freeze in the membrane when the ambient temperature is lower than zero, and even cause perforation or damage to the membrane electrode (MEA) in severe cases; and Repeated phase transitions of water and ice below 0°C have destructive effects on battery materials and structures. [...
Claims
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Patent Timeline
Login to view more IPC IPC(8): H01M8/04223H01M8/04225H01M8/04302H01M8/04313H01M8/0432F25D17/08
CPCF25D17/08H01M8/04253H01M8/04313H01M8/04373H01M8/04225H01M8/04302Y02E60/50
Inventor 周斌沈爱明甘全全姚元英
Owner SHANGHAI SHENLI TECH CO LTD
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