Thermohydraulic modelling of a transfer line for continuous flow cryostats

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Dittmar, N.^1 ; Weisemann, A.^1 ; Haberstroh, Ch.^1 ; Hesse, U.^1 ; Krzyzowski, M.^2

TU Dresden, Bitzer-Stiftungsprofessur fuer Kaelte-Kryo- und Kompressorentechnik, Germany^1

CryoVac Gesellschaft fuer Tieftemperaturtechnik MbH and Co. KG, Germany^2

关键词: Continuous flows;    Cryogenic cooling;    Evaporation loss;    Frictional pressure drops;    Insulation design;    Thermo-hydraulic;    Thermo-hydraulic model;    Transfer line design;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012129/pdf
DOI  :  10.1088/1757-899X/171/1/012129

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Continuous flow cryostats have to be steadily supplied with the cryogenic cooling agent, e.g. liquid helium (LHe) via a transfer line. The overall setup has to be characterised by a low consumption of the cryogen, determined not only by the cryostat design, but also by the transfer line design. In order to improve the transfer line's performance, i.e. reducing the evaporation losses a thermohydraulic model has been developed to evaluate different transfer line designs. The presented model is validated by experimental data achieved with a transfer line equipped with built-in pressure sensors. This transfer line has been designed in order to examine the related frictional pressure drop. The developed model allows to examine the impact of the hydraulic and the insulation design on the resulting evaporation losses.