Performance Study on a Two-Stage 4 K Pulse Tube Cooler

  • C. Wang
  • G. Thummes
  • C. Heiden
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

Systematic investigations towards performance improvement of a two-stage 4 K pulse tube cooler, concerning structural parameters, staging configuration and compressor input power, are presented in this paper. Theoretical analysis and experiment reveal that a proper negative DC flow through the double-inlet bypass has positive effects on cooling performance. With a modified cooler design a highest cooling power of 0.5 W at 4.2 K and 1 W at 5 K have been achieved. With heating load of 20 W at 67 K on the first stage, the 2nd stage can provide 0.42 W at 4.2 K. All these results have been obtained by using a 6 kW G-M compressor combined with a redesigned GM rotary valve. By using a compressor with measured input power of 1.7 kW the same cooler has a net cooling power of 170 mW at 4.2 K. The corresponding COP at 4.2 K is 1.0×10-4, which reaches the same order of magnitude as that of GM or GM+JT coolers at the same temperature range.

Keywords

Cooling Power Pulse Tube Cool Performance Coiled Tube Rotary Valve 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • C. Wang
    • 1
  • G. Thummes
    • 1
  • C. Heiden
    • 1
  1. 1.Institute of Applied PhysicsUniversity of GiessenGiessenGermany

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