Commissioning of the cryogenic safety test facility PICARD

Cryogenic Engineering Conference 2015

材料科学;物理学

Heidt, C.^1,2 ; Schön, H.^1 ; Stamm, M.^1 ; Grohmann, S.^1,2

Karlsruhe Institute of Technology, Institute for Technical Physics, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen

76344, Germany^1

Karlsruhe Institute of Technology, Institute for Technical Thermodynamics and Refrigeration, Kaiserstrasse 12, Karlsruhe

76131, Germany^2

关键词: Commissioning phase;    Experimental conditions;    Insulating vacuum;    Liquid helium;    Liquid helium cryostats;    Operating condition;    Rate measurements;    Test setups;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012161/pdf
DOI  :  10.1088/1757-899X/101/1/012161

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The sizing of cryogenic safety relief devices requires detailed knowledge on the evolution of the pressure increase in cryostats following hazardous incidents such as the venting of the insulating vacuum with atmospheric air. Based on typical design and operating conditions in liquid helium cryostats, the new test facility PICARD, which stands for Pressure Increase in Cryostats and Analysis of Relief Devices, has been constructed. The vacuum-insulated test stand has a cryogenic liquid volume of 100 liters and a nominal design pressure of 16 bar(g). This allows a broad range of experimental conditions with cryogenic uids. In case of helium, mass ow rates through safety valves and rupture disks up to about 4 kg=s can be measured. Beside ow rate measurements under various conditions (venting diameter, insulation, working uid, liquid level, set pressure), the test stand will be used for studies on the impact of two-phase ow and for the measurement of ow coefficients of safety devices at low temperature. This paper describes the operating range, layout and instrumentation of the test stand and presents the status of the commissioning phase.