Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon
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. Th...
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MDPI AG
2018-06-01
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| Online Access: | http://www.mdpi.com/1996-1073/11/6/1433 |
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| author | Zhongchao Zhao Yong Zhang Yanrui Zhang Yimeng Zhou Hao Hu |
| author_facet | Zhongchao Zhao Yong Zhang Yanrui Zhang Yimeng Zhou Hao Hu |
| author_sort | Zhongchao Zhao |
| collection | DOAJ |
| description | 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). |
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| id | doaj.art-5e2584cf1b354b53a80586959c441098 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T07:07:07Z |
| publishDate | 2018-06-01 |
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| series | Energies |
| spelling | doaj.art-5e2584cf1b354b53a80586959c4410982022-12-22T02:06:33ZengMDPI AGEnergies1996-10732018-06-01116143310.3390/en11061433en11061433Numerical Study on the Transient Thermal Performance of a Two-Phase Closed ThermosyphonZhongchao Zhao0Yong Zhang1Yanrui Zhang2Yimeng Zhou3Hao Hu4School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaSchool of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaThe 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).http://www.mdpi.com/1996-1073/11/6/1433thermosyphonvolume of fluidmultiphase flowevaporation and condensation |
| spellingShingle | Zhongchao Zhao Yong Zhang Yanrui Zhang Yimeng Zhou Hao Hu Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon Energies thermosyphon volume of fluid multiphase flow evaporation and condensation |
| title | Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon |
| title_full | Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon |
| title_fullStr | Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon |
| title_full_unstemmed | Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon |
| title_short | Numerical Study on the Transient Thermal Performance of a Two-Phase Closed Thermosyphon |
| title_sort | numerical study on the transient thermal performance of a two phase closed thermosyphon |
| topic | thermosyphon volume of fluid multiphase flow evaporation and condensation |
| url | http://www.mdpi.com/1996-1073/11/6/1433 |
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