Sub-cooled liquid nitrogen cryogenic system with neon turbo-refrigerator for HTS power equipment

S. Yoshida, H. Hirai, N. Nara, S. Ozaki, M. Hirokawa, T. Eguchi, H. Hayashi, M. Iwakuma, 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 sub-cooled liquid nitrogen (LN) circulation system for HTS power equipment. The system consists of a neon turbo-Brayton refrigerator with a LN sub-cooler and LN circulation pump unit. The neon refrigerator has more than 2 kW cooling power at 65 K. The LN sub-cooler is a plate-fin type heat exchanger and is installed in a refrigerator cold box. In order to carry out the system performance tests, a dummy cryostat having an electric heater was set instead of a HTS power equipment. Sub-cooled LN is delivered into the sub-cooler by the LN circulation pump and cooled within it. After the sub-cooler, sub-cooled LN goes out from the cold box to the dummy cryostat, and comes back to the pump unit. The system can control an outlet sub-cooled LN temperature by adjusting refrigerator cooling power. The refrigerator cooling power is automatically controlled by the turbo-compressor rotational speed. In the performance tests, we increased an electric heater power from 200 W to 1300 W abruptly. We confirmed the temperature fluctuation was about ±1 K. We show the cryogenic system details and performance test results 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, Volume 59
編集者Susan Breon, Jennifer Marquardt, Thomas Peterson, Michael DiPirro, John Pfotenhauer, Jonathan Demko, James Fesmire, Arkadiy Klebaner, Sidney Yuan, Al Zeller, Peter Kittel, Gregory Nellis, Mark Zagarola
出版社American Institute of Physics Inc.
ページ1246-1253
ページ数8
ISBN(電子版)9780735412019
DOI
出版ステータス出版済み - 1 1 2014
イベント2013 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2013 - Anchorage, 米国
継続期間: 6 17 20136 21 2013

出版物シリーズ

名前AIP Conference Proceedings
1573
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

会議

会議2013 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2013
Country米国
CityAnchorage
Period6/17/136/21/13

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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