Performance of RHIC Refrigerator V: Overall Refrigerator Performance Page: 2 of 15
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PERFORMANCE OF RHIC REFRIGERATOR V:
OVERALL REFRIGERATOR PERFORMANCE
K. C. WU
ABSTRACT
In February 1996, the RIIC Refrigerator was successfully cooled to liquid helium
temperature with 10 kilowatts of heat input at 4.5 K, 53 kilowatts of heat input at 60 K
and 44 grams per second of liquid extraction. A comprehensive analysis was performed to
evaluate the performance of the refrigerator including the turbines, the cold vacuum
compressor and the heat exchangers. Because of the amount of data and the number of
charts involved, the report is divided into five technical notes on, respectively: 1).
Flowmeter, 2). Turbines, 3). Cold Vacuum Compressor, 4). Heat Exchangers and 5).
Refrigerator Overall Performance. This technical note presents the Overall Performance
of the Refrigerator.
I. INTRODUCTION
The performance of the flowmeters, the turbines, the cold vacuum compressor and
the heat exchangers has been evaluated and results given in RHIC Technical Notes 99 to
102.1,2,3,4 With a few exceptions, the available instrumentation provides adequate
measurements for pressure, temperature and flow rate. Inadequate flow readings as
identified in Technical Note 99 were modified for the evaluation of the refrigerator.
The capability of the refrigerator to provide the necessary cooling for RHIC has
been demonstrated but the lowest temperature in the helium pots is 0.2 K above the design
value. The test results are very encouraging. The energy balance in each section of the
refrigerator is good. For one particular condition analyzed, good agreement between the
test results and the computer simulation was obtained.
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C., Wu K. Performance of RHIC Refrigerator V: Overall Refrigerator Performance, report, June 12, 1996; United States. (https://digital.library.unt.edu/ark:/67531/metadc865640/m1/2/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.