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Title: Determination of the Optimal Operating Parameters for the Jefferson Lab's Cryogenic Cold Compressor System

Abstract

Jefferson Lab's (JLab) Continuous Electron Beam Accelerator Facility (CEBAF) and Free Electron Laser (FEL) are supported by 2 K helium refrigerator known as the Central Helium Liquefier (CHL), which maintains a constant low vapor pressure over the accelerators' large liquid helium inventory with a five-stage centrifugal compressor train. The cold compressor train operates with constrained discharge pressure and can be varied over a range of suction pressures and mass flows to meet the operational requirements of the two accelerators. Using data from commissioning and routine operations of the cold compressor system, the presented procedure predicts an operating point for each cold compressor such that maximum efficiency is attained for the overall cold compressor system for a given combination of mass flow and vapor pressure. The procedure predicts expected efficiency of the system and relative compressors speeds for operating vapor pressures from 4 to 2.5 kPa (corresponds to overall pressure ratios of 29 to 56) and flow rates of 135 g/s to 250 g/s. The results of the predictions are verified by test for a few operating conditions of mass flows and vapor pressures.

Authors:
; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
829834
Report Number(s):
JLAB-ACC-03-14; DOE/ER/40150-2896
TRN: US0406480
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: 2003 Cryogenic Engineering Conference (CEC) And Cryogenic Materials Conference (ICMC), Anchorage, AK (US), 09/23/2003--09/26/2003; Other Information: PBD: 1 Jun 2004
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 43 PARTICLE ACCELERATORS; ACCELERATORS; COMMISSIONING; COMPRESSORS; CRYOGENICS; EFFICIENCY; ELECTRON BEAMS; FLOW RATE; FREE ELECTRON LASERS; HELIUM; REFRIGERATORS; VAPOR CONDENSERS; VAPOR PRESSURE

Citation Formats

Joe Wilson, Venkatarao Ganni, Dana Arenius, and Jonathan Creel. Determination of the Optimal Operating Parameters for the Jefferson Lab's Cryogenic Cold Compressor System. United States: N. p., 2004. Web.
Joe Wilson, Venkatarao Ganni, Dana Arenius, & Jonathan Creel. Determination of the Optimal Operating Parameters for the Jefferson Lab's Cryogenic Cold Compressor System. United States.
Joe Wilson, Venkatarao Ganni, Dana Arenius, and Jonathan Creel. Tue . "Determination of the Optimal Operating Parameters for the Jefferson Lab's Cryogenic Cold Compressor System". United States. https://www.osti.gov/servlets/purl/829834.
@article{osti_829834,
title = {Determination of the Optimal Operating Parameters for the Jefferson Lab's Cryogenic Cold Compressor System},
author = {Joe Wilson and Venkatarao Ganni and Dana Arenius and Jonathan Creel},
abstractNote = {Jefferson Lab's (JLab) Continuous Electron Beam Accelerator Facility (CEBAF) and Free Electron Laser (FEL) are supported by 2 K helium refrigerator known as the Central Helium Liquefier (CHL), which maintains a constant low vapor pressure over the accelerators' large liquid helium inventory with a five-stage centrifugal compressor train. The cold compressor train operates with constrained discharge pressure and can be varied over a range of suction pressures and mass flows to meet the operational requirements of the two accelerators. Using data from commissioning and routine operations of the cold compressor system, the presented procedure predicts an operating point for each cold compressor such that maximum efficiency is attained for the overall cold compressor system for a given combination of mass flow and vapor pressure. The procedure predicts expected efficiency of the system and relative compressors speeds for operating vapor pressures from 4 to 2.5 kPa (corresponds to overall pressure ratios of 29 to 56) and flow rates of 135 g/s to 250 g/s. The results of the predictions are verified by test for a few operating conditions of mass flows and vapor pressures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {6}
}

Conference:
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