Study on heat transfer characteristics of reservoir embedded loop heat pipe (1st report,Influence of evaporator orientation against gravity and charged liquid weight on heat transfer characteristics) |
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| Authors: | Hiroaki Ishikawa Tetsuro Ogushi Takehide Nomura Takeshi Iwakami Hiroyuki Noda Takahiro Yabe |
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| Affiliation: | 1. Advanced Technology R&D CTakeshiMitsubishi Electric Corp., Japan;2. Kamakura Works, Mitsubishi Electric Corp., Japan;3. Japan Aerospace Exploration Agency, Japan |
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| Abstract: | High‐powered satellites need larger heat rejection areas. A deployable radiator is one of the key technologies for a high‐powered satellite bus. A Reservoir Embedded Loop Heat Pipe (RELHP) is a two‐phase heat transfer device that constitutes a deployable radiator. RELHP has an evaporator core which is used as a liquid reservoir to enhance operational reliability. This paper presents the heat transport characteristics of a RELHP under changing evaporator orientation against gravity and charged ammonia weight by experiment and calculation. Liquid slug position in the reservoir has a great influence on heat transport characteristics, caused by changing heat transfer coefficients between returned liquid into the evaporator and vapor in the reservoir. © 2007 Wiley Periodicals, Inc. Heat Trans Asian Res, 36(3): 143– 157, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.20150 |
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| Keywords: | heat pipe space equipment multi‐phase flow porous media heat transfer loop heat pipe wick liquid slug |
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