Document IIF

Améliorations des systèmes et applications frigorifiques/de liquéfaction de l'hélium.

Improvements of helium liquefaction/refrigeration plants and applications.

Auteurs : MUEHLEGGER M., BERDAIS K. H., WILHELM H., et al.


Design features for a new range of helium liquefiers and refrigerators with capacities ranging from 30 to 280 l/h of liquid helium (LHe) and 100 to 900 W, respectively. The latest He cold box development shows an increased efficiency due to improved turbine and heat exchanger design. Other benefits of the new design include short cool-down times and a very compact design, which offers better flexibility and process control. The modularity of the system was designed in order to cover a wide range of applications like sophisticated shield cooling at different temperature levels or simultaneous operation modes for He liquefaction and refrigeration purposes. This paper highlights the individual improvements in the design. During the presentation the influence of certain parameters like power requirement and cold box inlet pressure in relation to the liquefaction and refrigeration capacity shall be shown and discussed for the range of newly developed helium liquefiers. In addition, the paper covers the latest results of recently installed liquefiers in comparison with the previous model.

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Pages : 2008-1


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  • Titre original : Improvements of helium liquefaction/refrigeration plants and applications.
  • Identifiant de la fiche : 2008-1488
  • Langues : Anglais
  • Source : Cryogenics 2008. Proceedings of the 10th IIR International Conference
  • Date d'édition : 21/04/2008


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