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Study of a liquid helium jet pump for circulating refrigeration systems

✍ Scribed by N.N. Agapov; A.I. Ageev; V.A. Belushkin; V.V. Krylov; A.G. Zel'dovich

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 701 KB
Volume: 18
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(78)90210-2

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✦ Synopsis

A basic diagram of the refrigeration system, in which liquid hefium is circulated by means of a jet pump, is described. The equations have been derived to design jet devices which operate with liquid helium.

In the experimental setup with a jet pump the flow rate of liquid was 5 to 10 times larger than that of compressed gas in a direct stream of the refrigerator. After pumping the pressure was equal to (0. 15-0.40) × 105 Nm -2. A circulating stream of liquid helium at supercritical pressure, due to the heat load corresponding to the refrigerator capacity, was heated to O. 15-0.251(. The results of our studies permit one to determine circulation loop parameters and main geometric dimensions of the jet pump.

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