System and method for gas precooling and cooling in low-temperature starting test of fuel cell

Abstract

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. [...

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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 increasing the cooling load of the high and low temperature environment box, and affecting the shutdown and purging of the stack or the system. To provide a system and method for performing gas precooling and cooling in a fuel cell low-temperature start-up test

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