Development of Multi-Loop Heat Pipes for Superconducting Magnet Applications

  • G. R. Chandratilleke
  • Y. Ohtani
  • H. Hatakeyama
  • M. Takahashi
  • H. Nakagome
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

In an early work, we reported that we have lowered the operation temperature level of a multi-loop heat pipe from the previously lowest 77 K level to 4 K level. The limiting heat transport of the heat pipe at 4 K using helium as the working fluid was however only about 0.2 W at the best. For the helium heat pipe to be able to transport 1 W, it is required to increase the heat transfer area at the heater section of the heat pipe. The area can be increased either by increasing the number of turns of the heat pipe or by increasing the heated length per turn of the heat pipe. Another factor that could have caused a low heat transport capacity in the heat pipe is the insufficiency of liquid charge. Therefore, we increased the number of turns from 10 to 52, the heated length per turn from 30 to 100 mm, and the liquid charge from 1/3 to 0.75. We have achieved nearly 1 W of heat transport for the following conditions: 52 turns, 100 mm heated length per turn, 45° heat pipe orientation and 0.45 liquid helium charge.

Keywords

Heat Transport Heat Pipe Heater Power Critical Heat Flux Heat Transfer Area 
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

  • G. R. Chandratilleke
    • 1
  • Y. Ohtani
    • 1
  • H. Hatakeyama
    • 1
  • M. Takahashi
    • 1
  • H. Nakagome
    • 1
  1. 1.R & D CenterToshiba CorporationKawasaki-ku, Kawasaki, 210Japan

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