What is working condition of “Heat exchanger for hydrogen fuel cell vehicle-mounted hydrogen supply system”？       The heat exchanger of the hydrogen supply system uses a mixture of ethylene glycol and water to exchange heat for the decompressed hydrogen from the hydrogen storage bottle (the lowest temperature of hydrogen affected by the environment is -40°C).       The advantages of microchannel heat exchangers used in vehicle-mounted hydrogen supply systems are small size, light weight, safety and reliability, and resistance to hydrogen corrosion and hydrogen embrittlement.