Demonstration Poloidal Coil Test Facility The Performance Test Results of the Cryogenic Cold Compressor

Masahiko SATO; Katumi KAWANO; Eisuke TADA; Tadao HIYAMA; Takashi KATO; Hidemasa YAMAMURA; Masahiro HOSHINO; Susumu SHIMAMOTO; Hiroshi ASAKURA; Nobuyoshi SAJI

doi:10.2221/jcsj.24.29

Demonstration Poloidal Coil Test Facility

The Performance Test Results of the Cryogenic Cold Compressor

Masahiko SATO, Katumi KAWANO, Eisuke TADA, Tadao HIYAMA, Takashi KATO, Hidemasa YAMAMURA, Masahiro HOSHINO, Susumu SHIMAMOTO, Hiroshi ASAKURA, Nobuyoshi SAJI

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JOURNAL FREE ACCESS

1989 Volume 24 Issue 1 Pages 29-35

DOI https://doi.org/10.2221/jcsj.24.29

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Abstract

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 of around 3, 000l, down to 0.5atm 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 1.0atm without any failure. High adiabatic efficiency (more than 60%) is achieved with wide flow range (25-65g/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.

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