Structure of high-performance evaporators for space application

Haruhiko Ohta, Shinmoto Yasuhisa, Toshiyuki Mizukoshi, Yosuke Ishikawa

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

1 被引用数 (Scopus)

抄録

A new structure of cold plates, where an unheated auxiliary channel is installed to supply liquid directly to the bottom of coalesced flattened bubbles in a narrow heated channel, is tested to investigate the increase in critical heat flux. Assuming the application to the laser solar power system, a large heating surface with a length of 150 mm in the flow direction is employed, and a narrow channel structure is adopted to reduce the size of cold plates, where the gap sizes are selected as 5 mm and 2 mm. Experiments are performed for water as a test liquid at inlet subcooling of 15 K under near atmospheric pressure. Inlet liquid velocity is varied from 0.065 m/s to 0.6m/s for the upward flow on ground. A value of critical heat flux of 2.2 × 106 W/m 2 is obtained for 5-mm gap size at the inlet velocity of 0.2 m/s. At low liquid flow rate, the structure realizes the CHF values larger by 2.5 times than those for the normal heated channel without additional liquid supply. A new method to evaluate the performance of cold plates is proposed to take account of the variation in the size of heating surface, inlet liquid velocity, and subcooling that influence the CHF values. The validity of the proposed structure of the cold plate for the increase in critical heat flux is confirmed.

本文言語英語
ホスト出版物のタイトルInterdisciplinary Transport Phenomena in the Space Sciences
出版社Blackwell Publishing Inc.
ページ668-679
ページ数12
ISBN(印刷版)1573316393, 9781573316392
DOI
出版ステータス出版済み - 1 1 2006

出版物シリーズ

名前Annals of the New York Academy of Sciences
1077
ISSN(印刷版)0077-8923
ISSN(電子版)1749-6632

All Science Journal Classification (ASJC) codes

  • 神経科学(全般)
  • 生化学、遺伝学、分子生物学(全般)
  • 科学史および科学哲学

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