Comparison of Maximum Heat Transfer Rate of Thin Vapor Chambers with Different Wicks under Multiple Heat Sources and Sinks

Sung Hyoun Kim, Seo Yeon Kang, Sung Jun Park and Seok Pil Jang ()
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Sung Hyoun Kim: School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Gyeonggi-do, Republic of Korea
Seo Yeon Kang: School of Smart Air Mobility Engineering, Korea Aerospace University, Goyang 10540, Gyeonggi-do, Republic of Korea
Sung Jun Park: School of Smart Air Mobility Engineering, Korea Aerospace University, Goyang 10540, Gyeonggi-do, Republic of Korea
Seok Pil Jang: School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Gyeonggi-do, Republic of Korea

Energies, 2024, vol. 17, issue 13, 1-15

Abstract: In this paper, we present a new analytical model to investigate the maximum heat transfer rate of a thin vapor chamber (TVC) with multiple heat sources and sinks. The model can specifically consider different heat flux conditions for each heat source. Both capillary limitations and allowable maximum temperature constraints were employed to determine the maximum heat transfer rate. The liquid and vapor pressure distributions within the TVC were analytically derived using the Brinkman-extended Darcy equation and the Hagen–Poiseuille equation, respectively. Additionally, the theoretical wall temperature distribution was calculated based on the 3D energy equation, considering different heat flux conditions for multiple heat sources with a weighting factor. Our results demonstrate that the heat flux conditions applied to the heat sources significantly impact the internal flow pattern of the TVC. These changes in flow patterns influence the pressure distributions of the liquid and vapor, thereby affecting the maximum heat transfer rate. Furthermore, the effects of wick parameters on the maximum heat transfer rate under various heat flux conditions were examined.

Keywords: thin vapor chamber; multiple heat sources; weighting factor; maximum heat transfer rate; screen mesh wick; grooved wick; sintered wick (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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