Testing of a 4 K to 2 K heat exchanger with an intermediate pressure drop
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Most large sub-atmospheric helium refrigeration systems incorporate a heat exchanger at the load, or in the distribution system, to counter-flow the sub-atmospheric return with the super-critical or liquid supply. A significant process improvement is theoretically obtainable by handling the exergy loss across the Joule-Thompson throttling valve supplying the flow to the load in a simple but different manner. As briefly outlined in previous publications, the exergy loss can be minimized by allowing the supply flow pressure to decrease to a sub-atmospheric pressure concurrent with heat exchange flow from the load. One practical implementation is to sub-divide the supply flow pressure drop between two heat exchanger sections, incorporating an intermediate pressure drop. Such a test is being performed at Jefferson Lab's Cryogenic Test Facility (CTF). This paper will briefly discuss the theory, practical implementation and test results and analysis obtained to date.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1255128
- Report Number(s):
- JLAB-ACE-15-2223; DOE/OR/23177-3811
- Journal Information:
- IoP Conf.Ser.Mater.Sci.Eng., Vol. 101; Conference: CEC/ICMC 2015, June 28-July 2, 2015, Tucson, AZ
- Country of Publication:
- United States
- Language:
- English
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