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Publication Information
Title Modifications to JLab 12 GeV Refrigerator and Wide Range Mix Mode Performance Testing Results
Abstract Analysis of data obtained during the spring 2013 commissioning of the new 4.5-K refrigeration system at Jefferson Lab (JLab) for the 12 GeV upgrade indicated a wide capacity range with good efficiency and minimal operator interaction. Testing also showed that the refrigerator required a higher liquid nitrogen (LN) consumption for its pre-cooler than anticipated by the design. This does not affect the capacity of the refrigerator, but it does result in an increased LN utility cost. During the summer of 2015 the modifications were implemented by the cold box manufacturer, according to a design similar to the JLab 12 GeV cold box specification. Subsequently, JLab recommissioned the cold box and performed extensive performance testing, ranging from 20% to 100% of the maximum capacity, and in various modes of operation, ranging from pure refrigeration, pure liquefaction, half-and-half mix mode and at selected design modes. This testing demonstrated the modifications resulted in a LN co
Author(s) Peter Knudsen, Venkatarao Ganni, Nusair Hasan, Kelly Dixon, Robert Norton, Jonathan Creel
Publication Date March 2017
Document Type Meeting, Proceedings
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Accelerator Ops, R&D / Engineering / Cryogenics
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-16-2502 OSTI Number: 1988137
LANL Number: Other Number: DOE/OR/23177-6622
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name 26th International Cryogenic Engineering Conference
Meeting Date 3/7/2016
Document Subtype Invited Talk (proceedings)
Proceedings
Title Materials Science and Engineering
Editor(s)
Publisher IOP Publishing
Refereed No
Page Number 171
Year 2016
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