The helium refrigerator/liquefier for large helical device (LHD).

[In Japanese. / En japonais.]

Author(s) : MAEKAWA R., MITO T., SATOH S.

Type of article: Article


The helium refrigerator has a total refrigeration capacity of 5.65 kilowatts at 4.4 K and 20.6 kilowatts at 80 K and 650 liter/h liquefaction. The refrigerator was designed to have high processing efficiency since the construction expense is much less than the operating cost. In order to achieve this, the refrigerator has two precooling cycles (300 to 80 K and 80 to 20 K) and has two turboexpanders running in parallel with different temperature levels at the cold end. To achieve a high mass flow rate in a low-temperature regime, eight screw-type compressors are operated at room temperature.


  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1999-0007
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 32 - n. 11
  • Publication date: 1997
  • Document available for consultation in the library of the IIR headquarters only.


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