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First experimental data of the cryogenic safety test facility PICARD

Heidt, Carolin; Henriques, Andre; Stamm, Michael; Grohmann, Steffen

Abstract (englisch):
The test facility PICARD, which stands for Pressure Increase in Cryostats and Analysis of Relief Devices, has been designed and constructed for cryogenic safety experiments. With a cryogenic liquid volume of 100 L, a nominal design pressure of 16 bar(g) and the capacity of measuring helium mass flow rates through safety relief devices up to 4 kg/s, the test facility allows the systematic investigation of hazardous incidents in cryostats under realistic conditions. In the course of experiments, the insulating vacuum is vented with atmospheric air or gaseous nitrogen at ambient temperature under variation of the venting diameter, the thermal insulation, the cryogenic fluid, the liquid level and the set pressure in order to analyze the impact on the heat flux and hence on the process dynamics. A special focus will be on the occurrence and implications of two-phase flow during expansion and on measuring the flow coefficients of safety devices at cryogenic temperatures. This paper describes the commissioning and the general performance of the test facility at liquid helium temperatures. Furthermore, the results of first venting experimen ... mehr

Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Institut für Technische Thermodynamik und Kältetechnik (ITTK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1088/1757-899X/171/1/012044
ISSN: 1757-8981, 1757-899X
KITopen ID: 1000067036
HGF-Programm 37.06.02; LK 01
Erschienen in IOP conference series / Materials science and engineering
Band 171
Seiten 012044/1-7
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