Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model
A modified CFD model was developed to investigate the heat and mass transfer performance of a two-phase closed thermosiphon (TPCT). In this model, the phase-change temperature of the working fluid was considered to be dependent on the local pressure. Meanwhile, an auto-adjust and control strategy wa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X2100318X |
| _version_ | 1829143310083555328 |
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| author | Huicong Yao Chaoyu Yue Yinfeng Wang Haijun Chen Yuezhao Zhu |
| author_facet | Huicong Yao Chaoyu Yue Yinfeng Wang Haijun Chen Yuezhao Zhu |
| author_sort | Huicong Yao |
| collection | DOAJ |
| description | A modified CFD model was developed to investigate the heat and mass transfer performance of a two-phase closed thermosiphon (TPCT). In this model, the phase-change temperature of the working fluid was considered to be dependent on the local pressure. Meanwhile, an auto-adjust and control strategy was established for the condensation mass transfer time relaxation parameter, which could balance the phase-change pressure to the working pressure. The modified phase-change model was verified by experiments and then used to investigate the heat and mass transfer behaviors of the TPCT under different heat flux of 12.31–15.95 kW/m2. The results indicated that the maximum relative errors of wall temperature and working pressure of the TPCT were 0.25–0.48% and 0.14–0.46%, respectively. The wall temperature gradually decreases from the bottom of evaporator to adiabatic section, and then increases from the bottom to the top of the condenser due to the temperature difference between the inlet and outlet of the cooling water. Also, as the heat flux increase, the overall thermal resistance reduces from 0.060 to 0.055 K/W. These results indicate that the proposed model can be used to predict the heat and mass transfer of the TPCT. |
| first_indexed | 2024-12-14T20:47:03Z |
| format | Article |
| id | doaj.art-38dd37aa1b9b4d549bc9c9f3b44d1cf3 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-14T20:47:03Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-38dd37aa1b9b4d549bc9c9f3b44d1cf32022-12-21T22:47:58ZengElsevierCase Studies in Thermal Engineering2214-157X2021-08-0126101155Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD modelHuicong Yao0Chaoyu Yue1Yinfeng Wang2Haijun Chen3Yuezhao Zhu4School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, 211816, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, 211816, ChinaSchool of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China; Corresponding author.School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, 211816, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, 211816, China; School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, ChinaA modified CFD model was developed to investigate the heat and mass transfer performance of a two-phase closed thermosiphon (TPCT). In this model, the phase-change temperature of the working fluid was considered to be dependent on the local pressure. Meanwhile, an auto-adjust and control strategy was established for the condensation mass transfer time relaxation parameter, which could balance the phase-change pressure to the working pressure. The modified phase-change model was verified by experiments and then used to investigate the heat and mass transfer behaviors of the TPCT under different heat flux of 12.31–15.95 kW/m2. The results indicated that the maximum relative errors of wall temperature and working pressure of the TPCT were 0.25–0.48% and 0.14–0.46%, respectively. The wall temperature gradually decreases from the bottom of evaporator to adiabatic section, and then increases from the bottom to the top of the condenser due to the temperature difference between the inlet and outlet of the cooling water. Also, as the heat flux increase, the overall thermal resistance reduces from 0.060 to 0.055 K/W. These results indicate that the proposed model can be used to predict the heat and mass transfer of the TPCT.http://www.sciencedirect.com/science/article/pii/S2214157X2100318XVolume of modelAdjust & control strategyHeat transfer mechanismTwo-phase flowTwo-phase closed thermosiphon |
| spellingShingle | Huicong Yao Chaoyu Yue Yinfeng Wang Haijun Chen Yuezhao Zhu Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model Case Studies in Thermal Engineering Volume of model Adjust & control strategy Heat transfer mechanism Two-phase flow Two-phase closed thermosiphon |
| title | Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model |
| title_full | Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model |
| title_fullStr | Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model |
| title_full_unstemmed | Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model |
| title_short | Numerical investigation of the heat and mass transfer performance of a two-phase closed thermosiphon based on a modified CFD model |
| title_sort | numerical investigation of the heat and mass transfer performance of a two phase closed thermosiphon based on a modified cfd model |
| topic | Volume of model Adjust & control strategy Heat transfer mechanism Two-phase flow Two-phase closed thermosiphon |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X2100318X |
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