Demonstration poloidal coil test facility. The performance test results of the cryogenic cold compressor
実証ポロイダルコイル付属冷凍系 低温排気ポンプ性能試験結果

Masahiko SATO, Katumi KAWANO, Eisuke TADA, Tadao HIYAMA, Takashi KATO, Hidemasa YAMAMURA, Masahiro HOSHINO, Susumu SHIMAMOTO, Hiroshi ASAKURA, Nobuyoshi SAJI
1989 TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)  
Synopsis: A new compact cryogenic cold compressor was developed by Japan Atomic Energy Research Institute (JAERI) in collaboration with Isikawajima-Harima Heavy Industries Co ., Ltd. (IHI) in order to produce the supercritical helium below 4.2K for Demonstration Poloidal Coils (DPC) which are forced-flow cooled type superconducting pulse coils. This compressor is one of key components for DPC test facility. The cold compressor reduces pressure in liquid helium bath, which contains liquid helium
more » ... of around 3,000l, down to 0.5 atm efficiently . Consequently, supercritical helium down to 3.5K is produced and supplied to the DPC coils . A centrifugal compressor with dynamic gas bearing is selected as a compressor mechanism to realize high adiabatic efficiency and large flow rate. In this performance tests , the compressor was operated for 220h at saturated condition from 0.5 to 1.0 atm without any failure. High adiabatic efficiency (more than 60%) is achieved with wide flow range (25-65 g/s) and the design value is fully satisfied. The compressor can rotate up to 80 ,000rpm at maximum then the coil supply temperature of supercritical helium is 3.5K.
doi:10.2221/jcsj.24.29 fatcat:5ln5suuqh5dnlfmx3gt6ivqcpy