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He II Two Phase Flow in an Inclinable 22 m Long Line

  • B. Rousset
  • A. Gauthier
  • B. Jager
  • R. van Weelderen
Chapter
Part of the Advances in Cryogenic Engineering book series (ACRE)

Abstract

In the line of previous work done at CEA Grenoble, large size experiments were performed with the support of CERN for the validation of the LHC two phase superfluid helium cooling scheme. In order to be as close as possible to the real configuration, a straight, inclinable 22 m long line of 40 mm I.D. was built. Very accurate measurements of temperatures and pressures obtained after in situ re-calibration and verified by independent sensors allowed us to validate our two-phase flow model. Although we focus on pressure losses and heat exchange results in relation to power injected, additional measurements such as quality, void fraction, and total mass flow rate enable a complete description of the two-phase flow. Experiments were carried out to cover the whole range of the future LHC He II two-phase flow heat exchanger pipe: slope between 0 and 2.8 %, temperature between 1.8 and 2 K, total mass flow rate up to 7.5 g/s. Results confirm the validity of choice for the LHC cooling scheme.

Keywords

Pressure Loss Excess Wetting Superfluid Helium Saturated Flow Vapour Velocity 
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 2000

Authors and Affiliations

  • B. Rousset
    • 1
  • A. Gauthier
    • 1
  • B. Jager
    • 1
  • R. van Weelderen
    • 2
  1. 1.Département de Recherche Fondamentale sur la Matière Condensée/SBTC.E.A. GrenobleGrenoble Cédex 9France
  2. 2.CERN, European Organization for Nuclear Research, AT/CRGeneva, 23Switzerland

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