Speaker
Gang Zhou
(Techincal Institute of Physics and Chemistry, CAS)
Description
In the design of large scale helium refrigerators, it has been found that the UA ratio between the heat exchangers will influence the temperature distribution, which will be required in some special applications, such as the temperature before the expansion or some set temperatures. In this paper, a 2000W@20K helium refrigerator without Nitrogen precooling is described, which need a 70K temperature for cooling the radiation shields and a 20K temperature for cooling the heat load. The calculation showed the relationship between the UA ratios and the temperature between the heat exchangers, which proposes some requirements to the design and produce the heat exchangers.
| Submitters Country | China |
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Authors
Cui Lv
Gang Zhou
(Techincal Institute of Physics and Chemistry, CAS)
Jing Li
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Linghui Gong
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Liqiang Liu
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Xiangdong Xu
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
ZhengYu Li
(Technical Institute of Physics and Chemistry,CAS)
