Neon turbo-brayton cycle refrigerator for hts power machines

H. Hirai, M. Hirokawa, S. Yoshida, N. Nara, S. Ozaki, H. Hayashi, H. Okamoto, Y. Shiohara

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

9 被引用数 (Scopus)

抄録

We developed a prototype turbo-Brayton refrigerator whose working fluid is neon gas. The refrigerator is designed for a HTS (High Temperature Superconducting) power transformer and its cooling power is more than 2 kW at 65 K. The refrigerator has a turbo-expander and a turbo-compressor, which utilize magnetic bearings. These rotational machines have no rubbing parts and no oil-components. Those make a long maintenance interval of the refrigerator. The refrigerator is very compact because our newly developed turbo-compressor is volumetrically smaller than a displacement type compressor in same operating specification. Another feature of the refrigerator is a wide range operation capability for various heat-loads. Cooling power is controlled by the input-power of the turbo-compressor instead of the conventional method of using an electric heater. The rotational speed of the compressor motor is adjusted by an inverter. This system is expected to be more efficient. We show design details, specification and cooling test results of the new refrigerator in this paper.

本文言語英語
ホスト出版物のタイトルAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference-CEC
ページ1672-1679
ページ数8
57
DOI
出版ステータス出版済み - 2012
イベント2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences - Spokane, WA, 米国
継続期間: 6 13 20116 17 2011

出版物シリーズ

名前AIP Conference Proceedings
番号57
1434
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

会議

会議2011 Joint Cryogenic Engineering and International Cryogenic Materials Conferences
Country米国
CitySpokane, WA
Period6/13/116/17/11

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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