文档介绍：Cryogenics 51 (2011) 1–15
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Cryogenics
journal homepage: ate/cryogenics
A dynamic model of a liquid helium transfer line at the Canadian Light Source
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C. Regier a, , J. Pieper b, E. Matias a
a Canadian Light Source, 101 Perimeter Road, Saskatoon, Saskatchewan, Canada S7N 0X4
b University of Calgary, Dept. of Mechanical and Manufacturing Engineering, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
article info abstract
Article history: This paper describes the creation and validation of puter model of a liquid helium transfer line
Received 7 July 2010 located at the Canadian Light Source (CLS) in Saskatoon, Canada. This line transfers liquid helium to a
Received in revised form 29 September cryostat, which contains a superconducting radio frequency (RF) cavity, and requires precise pressure
2010
and level modulation to ensure proper RF control. A detailed mathematical model of the transfer line
Accepted 30 September 2010
is created based on mass, momentum, and energy continuity along with pressure–volume–temperature
relations. The model is discretized and solved, and model results pared with experimental data
taken from the actual cryostat at the CLS to validate of the simulation. The validated model is found to
Keywords:
reasonably predict flow rates through the transfer line at the CLS from a process perspective.
Cryostats
Thermodynamics Ó 2010 Elsevier Ltd. All rights reserved.
Phase transitions
Normal helium
RF applications
1. Introduction structure rather than basic flow parameters [3]. The model of the
LHe line contained in [4] is similar to this model, but is much sim-
The radio frequency (RF) cavity in a synchrotron storage ring is pler and does not take into account the potential for variances in
used to replenish energy lost by the electron beam as it emits pho- heat transfer and, in particular, cryostat pressure.
ton radiation. The storage ring at the Canadian Light