Advertisement

Status, Operation and Performance of the RHIC Helium Refrigerator

  • K. C. Wu
  • M. Iarocci
  • J. Sondericker
  • J. Benson
  • Y. Farah
  • C. Lac
  • A. Morgillo
  • A. Nicoletti
  • E. Quimby
  • J. Rank
  • M. Rehak
  • D. Zantopp
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 43)

Abstract

The Relativistic Heavy Ion Collider RHIC helium refrigerator was modified from the refrigerator originally constructed fifteen years ago for the ISABELLE accelerator. The modifications include a new cold vacuum compressor and relocating the cold circulating compressor to the cryogenic distribution valve boxes, which are located near the cryogenic feed to the collider rings. Prior to start up, an extensive effort was spent on improving conditions of the compressor system, turbine skids, valves, instrumentation and control apChapautus. In February, 1996, the RHIC refrigerator was successfully cooled to liquid helium temperature with 10 kW of heat input at 4.5 K, 53 kW at 60 K and 44 g/s of liquefaction, using approximately two-thirds of the installed compressor capacity. In July, 1996, the refrigerator was used to cool a 350 meter vacuum jacketed transfer line and two cryogenic distribution valve boxes. In February, 1997, the refrigerator was used to cool the first RHIC sextant for over one month of operation. At the end of the first sextant test, an electric heat input of 25 kW at approximately 5.5 K was introduced to simulate a full refrigeration capacity mode. The capacity and reliability of the refrigerator have been demonstrated. The performance of the refrigerator including turbines, heat exchangers, cold vacuum compressor and circulating compressor is given.

Keywords

Heat Exchanger Guide Vane Centrifugal Compressor Flow Coefficient Work Extraction 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    D. P. Brown, M. Afrashteh. J. A. Bamberger, A. Fresco. A. P. Schlafke. W. J. Schneider, A. Werner and K. C. Wu, in “Advances in Cryogenic Engineering”. Vol. 27, Plenum Press, N.Y. (1982), p. 509.Google Scholar
  2. 2.
    D. P. Brown, A. P. Schlafke, K. C. Wu and R. W. Moore, Cycle design for the ISABELLE helium refrigerator, in “Advances in Cryogenic Engineering”, Vol. 27. Plenum Press, N.Y., (1982), p. 501.Google Scholar
  3. 3.
    A. Nicoletti and K. C. Wu, in “Advances in Cryogenic Engineering”, Vol. 39, Plenum Press, N.Y., (1994), p. 1593.Google Scholar
  4. 4.
    M. Iarocci, etc., “RHIC 25 kW Refrigerator and Distribution System, Construction, Testing and Initial Operating Experience”, presented in the 1997 CEC conference.Google Scholar
  5. 5.
    J. Sondericker, etc.. “Performance and Cryogenic Operating Experience of the RHIC First Sextant Test”, presented in the 1997 CEC conference.Google Scholar
  6. 6.
    J. Benson, etc., “Performance of the RHIC Cryogenic Control System During the First Sextant Test”, presented in the 1997 CEC conference.Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • K. C. Wu
    • 1
  • M. Iarocci
    • 1
  • J. Sondericker
    • 1
  • J. Benson
    • 1
  • Y. Farah
    • 1
  • C. Lac
    • 1
  • A. Morgillo
    • 1
  • A. Nicoletti
    • 1
  • E. Quimby
    • 1
  • J. Rank
    • 1
  • M. Rehak
    • 1
  • D. Zantopp
    • 1
  1. 1.RHIC DepartmentBrookhaven National LaboratoryUptonUSA

Personalised recommendations