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Title: Numerical modeling of a 2K J-T heat exchanger used in Fermilab Vertical Test Stand VTS-1

Fermilab Vertical Test Stand-1 (VTS-1) is in operation since 2007 for testing the superconducting RF cavities at 2 K. This test stand has single layer coiled finned tubes heat exchanger before J-T valve. A finite difference based thermal model has been developed in Engineering Equation Solver (EES) to study its thermal performance during filling and refilling to maintain the constant liquid level of test stand. The model is also useful to predict its performance under other various operating conditions and will be useful to design the similar kind of heat exchanger for future needs. Present paper discusses the different operational modes of this heat exchanger and its thermal characteristics under these operational modes. Results of this model have also been compared with the experimental data gathered from the VTS-1 heat exchanger and they are in good agreement with the present model.
 [1] ;  [2]
  1. Raja Ramanna Centre for Advanced Technology (RRCAT), Indore (MP), India
  2. FNAL
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0011-2275
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cryogenics; Journal Volume: 62
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
2 Kelvin J-T Heat Exchanger; Vertical Test Stand Operation; 2 Kelvin Refrigeration Systems; HEP