Study on heat transfer characteristics of reservoir embedded loop heat pipe (Influence of condenser cooling method on heat transfer characteristics) |
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| Authors: | Hiroaki Ishikawa Takehide Nomura Tetsuro Ogushi Hiroyuki Noda Haruo Kawasaki Takahiro Yabe |
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| Affiliation: | 1. Advanced Technology R&D Center, Mitsubishi Electric Corp., Japan;2. Kamakura Works, Mitsubishi Electric Corp., Japan;3. Department of Mechanical and Robotics Faculty of Engineering, Hiroshima International University, Japan;4. Japan Aerospace Exploration Agency, Japan |
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| Abstract: | As heat generation in satellites increases, securing sufficient radiator panel area is an important problem. Deployable radiators, whose radiator panels are deployed post‐launch in space to increase the effective radiator panel area of the satellite, is becoming an important thermal control technology. A reservoir embedded loop heat pipe (RELHP) is applied to the deployable radiator for a thermal transport device. This paper presents the heat transport dynamic characteristics of a RELHP using a radiant cooling condenser and liquid forced convection cooling condenser by an experimental study. It was found that heat leak into the liquid line, flexible line, and reservoir increases the length of the sub‐cooling region in the condenser. In the case of the radiant cooling condenser, the sub‐cooling region length is shorter than that of a liquid forced convection cooling condenser. Furthermore, vapor temperature is mainly decided by the radiation capacity of the radiator panel, because liquid temperature returned into the evaporator rises with an increase in radiator panel temperature. In addition, time length from start‐up until steady state is greater than the liquid forced convection cooling condenser case, because the radiator panel has a large heat capacity. © 2008 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.20229 |
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| Keywords: | heat pipe space equipment multi‐phase flow radiator radiation forced convection heat transfer loop heat pipe |
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