Abstract
Helium at a temperature of 20K and high pressure is widely used as a gas source for cryogenic products. In the past, helium was usually cooled by liquid hydrogen immersion. This method needs to consume lots of liquid hydrogen and has poor safety. The cooling time is also too long. This paper designs a high-pressure helium heat exchanger to obtain and store helium with 20K at 35MPa required by a certain system. The heat exchanger can not only meet the gas requirements but also can control the cooling time within 48 hours.
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