Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon

Zhongchao Zhao, Yong Zhang, Yanrui Zhang, Yimeng Zhou and Hao Hu
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Zhongchao Zhao: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China
Yong Zhang: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China
Yanrui Zhang: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China
Yimeng Zhou: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China
Hao Hu: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China

Energies, 2018, vol. 11, issue 6, 1-15

Abstract: The transient thermal performance of phase change and heat and mass transfer in a two-phase closed thermosyphon are studied with computational fluid dynamics (CFD). A CFD model based on the volume of fluid technique is built. Deionized water is specified as the working fluid of this thermosyphon. The CFD model reproduces evaporation and condensation in the thermosyphon at different heating inputs. The average wall temperatures are also analyzed. Variations of average wall temperatures indicate that this thermosyphon reaches a steady state after 19 s, and starts to work in advance when the heating input increases. Moreover, thermal resistance is decreased until a minimum (0.552 K/W) by increasing the heating input, and the effective thermal conductivity is elevated to a maximum (2.07 × 106 W/m?K).

Keywords: thermosyphon; volume of fluid; multiphase flow; evaporation and condensation (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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