Speaker
Haoying Qi
(Technical Institute of Physics and Chemistry, CAS)
Description
A 1.8K superfluid 4He system could be used in many cryogenic devices, such as the separation of helium isotopes and the advanced superconducting accelerator. Cryogenic stop valve is one of the most important part of the 1.8K system. Simulation studies on heat transfer were made by ANSYS. According to the simulated data, the heat loss was reduced by 60% when the double heat sinks were welded and the stem tube was made of materials with low thermal conductivity. The seal-technology was brought for the stop valve in the low temperature. The leakage rate of the stop valve was analyzed and tested in the normal temperature and in the low temperature. The result of the tests showed the stop valve has stable valve seat sealing performance.
Author
Liguo Wang
(University of Chinese Academy of Sciences)
Co-authors
Dong Xu
(IPC)
Liancheng Xie
(University of Chinese Academy of Sciences)
Rongjin Huang
(Technical Institute of Physics and Chemistry, Chinese Academy o)
Laifeng Li
(Technical Institute of Physics and Chemistry, Chinese Academy o)
Haoying Qi
(Technical Institute of Physics and Chemistry, CAS)
