Determining heat leak to helium pipelines

Vishnev, I. P.; Vinokur, Yu. G.; Шапошников, В. А.; Tityushin, E. A.

doi:10.1007/bf01157499

Cited by 3 publications

(1 citation statement)

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“…This method requires a sufficient flow regulation and measurements of the vessel pressures, the deposited volume in the transport vessel, and the flow rate of the return gas. Earlier proposed methods measure the temperature rise of a gas stream inside [2], [3] or outside the transfer line [4], [5] to determine the heat leak. These methods are, in contradiction to the zero delivery method, not applicable during the ordinary operation of standard LHe transfer lines.…”

Section: Introductionmentioning

confidence: 99%

Characterization of flexible transfer lines for liquid helium. New experimental results

Dittmar¹,

Haberstroh²,

Hesse³

2014

AIP Conference Proceedings

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Abstract. The transfer of liquid helium (LHe) at decant stations with flexible transfer lines is characterized by high evaporation losses. These losses are mainly caused by the static heat leak and the specific pressure drop of the transfer line. An extensive series of tests allows the characterization of a flexible LHe transfer line regarding its specific transfer performance, outlet quality, static heat leak, and overall pressure drop at Reynolds numbers from 340,000 to 740,000. Implemented pressure and temperature sensors allow studies of the fluid behavior during the transfer line operation. The achieved measurement results provide the basis for a new low loss flexible transfer line.

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