1986 | OriginalPaper | Chapter
Configuration and Testing of a Saturated Vapor Helium Compressor
Authors : Jill L. Ludwigsen, J. L. Smith Jr., Y. Iwasa
Published in: Advances in Cryogenic Engineering
Publisher: Springer US
Included in: Professional Book Archive
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A saturated vapor helium compressor was designed and tested as a component of a helium-temperature refrigeration cycle. The use of the cold compressor allows reduction of both the precooling heat exchanger area and main compressor size compared to a conventional cycle due to increased pressure of the return gas. The compressor tested was a single-piston reciprocating device which was controlled with programmable hydraulic/pneumatic logic. The compressor was mounted at the cold end of a CTI Model 1400 helium liquefier. An average compression ratio of 2.4 was obtained and an average efficiency of 82% was achieved. In computing compressor efficiency, external heat leaks to the compressor were neglected.