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Bang, In Cheol
Nuclear Thermal-Hydraulics & Reactor Safety Lab
Research Interests
  • Nuclear Thermal-Hydraulics
  • Nuclear Safety
  • Nuclear System Design & Analysis
  • Nanofluids
  • Critical Heat Flux

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Performance of annular flow path heat pipe with a polymer insert controlling compactness for energy applications

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Title
Performance of annular flow path heat pipe with a polymer insert controlling compactness for energy applications
Author
Kim, In GukKim, Kyung MoJeong, Yeong ShinBang, In Cheol
Issue Date
2016-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.92, pp.929 - 939
Abstract
This study experimentally investigates the effect of the cross-sectional area of vapor path on the heat transfer performance of a water-filled heat pipe with a polymer insert for optimizing its design. The thermal resistance and the heat transfer coefficient of the heat pipe with a screen mesh wick were measured at a saturation pressure ranging from 6.0 kPa to 12.5 kPa. It is observed that the changes of the capillary limit and the overall heat transfer coefficient come from the reduction of the vapor space. When the cross-sectional area of the vapor path is reduced to 48.3%, the capillary limit of the heat pipe is decreased by 22.9%. But the overall heat transfer coefficient of the heat pipe is slightly decreased by 3-7%. When the cross-sectional area of the vapor path is reduced to 76.8%, the capillary limit and the heat transfer coefficient of the heat pipe are decreased by 40.7% and 21.0%, respectively. Therefore, the reduction of the overall heat transfer coefficient of the heat pipe has no great effects according to the cross-sectional area of the vapor path. The experimental results suggest the direction of the optimization of the heat pipe in terms of space management for compact devices. Or, if there is enough margin in capillary limit, the optimized compact vapor path without losing heat transfer performance too much can be acquired or excess space can be used for special applications such as neutron absorber in nuclear control rods and structural supports in the electronic cooling for compactness.
URI
https://scholarworks.unist.ac.kr/handle/201301/17621
URL
http://www.sciencedirect.com/science/article/pii/S0017931015305068
DOI
10.1016/j.ijheatmasstransfer.2015.09.037
ISSN
0017-9310
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