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Small scale liquefaction of hydrogen utilizing reverse-Brayton and modified-Claude cycle helium gas refrigerator cycles.

Author(s) : ANKERMANN T.

Summary

Small scale liquefaction of hydrogen, on the order of 25 liters/hour, has not been widespread, but some applications do exist and several small scale hydrogen liquefier systems have been built. For reasons of safety and economics, such systems have been designed around a helium refrigerator which typically operates using a reverse-Brayton cycle. The cold helium gas produced by the refrigerator is passed through a separate counter-flow heat exchanger thereby cooling and liquefying hydrogen gas flowing the other way. By using a modified-Claude cycle, the helium refrigeration process can be optimized and higher efficiency can be realized. The paper discusses the rationale for small scale liquefaction of hydrogen with helium refrigerators, and presents the process design for an optimized 25 liters/hour hydrogen liquefier.

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Pages: 306-313

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Details

  • Original title: Small scale liquefaction of hydrogen utilizing reverse-Brayton and modified-Claude cycle helium gas refrigerator cycles.
  • Record ID : 1993-0652
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10

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