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

Journal Article · Tue Jul 01 00:00:00 EDT 2014 · Cryogenics

DOI:https://doi.org/10.1016/j.cryogenics.2014.03.018· OSTI ID:1151754

Gupta, Prabhat Kumar ^[1]; Rabehl, Roger ^[2]

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1. Raja Ramanna Centre for Advanced Technology (RRCAT), Indore (MP), India
2. FNAL

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.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1151754
• Report Number(s): FERMILAB-PUB-13-573-TD
• Journal Information: Cryogenics, Vol. 62; ISSN 0011-2275
• Country of Publication: United States
• Language: English

Related Subjects

2 Kelvin J-T Heat Exchanger
Vertical Test Stand Operation
2 Kelvin Refrigeration Systems
HEP