Automatic pumpdown of the 2K cold compressors for the CEBAF central helium liquefier

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Description

The 2K system at CEBAF includes four stages of centrifugal cold compressors that operate between a suction pressure of 0.031 atm and a discharge of {approximately}1 atm. Starting the cold compressors and pumping the system down to operating pressure is a complex and time consuming operation. Many months of rigorous testing were required to develop a reliable startup procedure. This procedure has been automated through the development of an Autopumpdown program that intelligently coordinates the necessary steps across the boundaries of the existing cryogenic and accelerator control systems. this program has greatly reduced both the time and effort required to ... continued below

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9 p.

Creation Information

Bevins, B.S.; Chronis, W.C. & Keesee, M.S. August 1, 1996.

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Description

The 2K system at CEBAF includes four stages of centrifugal cold compressors that operate between a suction pressure of 0.031 atm and a discharge of {approximately}1 atm. Starting the cold compressors and pumping the system down to operating pressure is a complex and time consuming operation. Many months of rigorous testing were required to develop a reliable startup procedure. This procedure has been automated through the development of an Autopumpdown program that intelligently coordinates the necessary steps across the boundaries of the existing cryogenic and accelerator control systems. this program has greatly reduced both the time and effort required to recover from failures and restart the system. The paper describes the requirements addressed by the program, the steps it takes while operating, the historical development of the program, the spin-off benefits, and the course of anticipated future developments.

Physical Description

9 p.

Notes

INIS; OSTI as DE96013707

Source

  • Other Information: PBD: [1996]

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Identifier

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  • Other: DE96013707
  • Report No.: DOE/ER/40150--320
  • Report No.: CEBAF-PR--95-010
  • Grant Number: AC05-84ER40150
  • DOI: 10.2172/377601 | External Link
  • Office of Scientific & Technical Information Report Number: 377601
  • Archival Resource Key: ark:/67531/metadc678571

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • August 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 17, 2017, 6:13 p.m.

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Bevins, B.S.; Chronis, W.C. & Keesee, M.S. Automatic pumpdown of the 2K cold compressors for the CEBAF central helium liquefier, report, August 1, 1996; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc678571/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.