Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers
Double pipe heat exchangers (DPHEs) are widely used in industrial fields, such as refrigeration, heat pumps, and chemical industry, owing to their efficient coupled heat transfer characteristics of evaporation and condensation. In this study, the effects of inner and outer tube diameter combinations...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016988 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841555653299011584 |
|---|---|
| author | Junrong Yang Tianming Zhong Xin Yan Haokun Li Zhilin He Haoxian Bai Shiwen Fang |
| author_facet | Junrong Yang Tianming Zhong Xin Yan Haokun Li Zhilin He Haoxian Bai Shiwen Fang |
| author_sort | Junrong Yang |
| collection | DOAJ |
| description | Double pipe heat exchangers (DPHEs) are widely used in industrial fields, such as refrigeration, heat pumps, and chemical industry, owing to their efficient coupled heat transfer characteristics of evaporation and condensation. In this study, the effects of inner and outer tube diameter combinations and inlet velocity on heat transfer performance, pressure drop, and thermal performance are systematically analyzed through computational fluid dynamic simulation. Results show a significant difference in heat transfer performance under different conditions. At an inlet velocity of 2 ms−1, the total heat transfer coefficient of Case 5 is 66.1 % higher than that of Case 2. Case 3 has the lowest pressure drop among all the cases. Turbulence increases interface renewal, mixing efficiency, and heat transfer efficiency when the inlet velocity is 8 ms−1. When the velocity is 2 ms−1, turbulence is reduced, and the gravity effect dominates across, resulting in a drop in heat transfer efficiency. This study reveals the influence law of inner and outer tube diameters and flow velocity on the coupled heat transfer characteristics, which provides an important theoretical basis and a practical reference for optimizing the design of DPHEs and has significant application in heat-intensive industries. |
| format | Article |
| id | doaj-art-1150f2e70c404fd98d30648c9988d745 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-1150f2e70c404fd98d30648c9988d7452025-01-08T04:52:50ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105667Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangersJunrong Yang0Tianming Zhong1Xin Yan2Haokun Li3Zhilin He4Haoxian Bai5Shiwen Fang6Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaCorresponding author.; Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaZhongkai University of Agriculture and Engineering, Guangzhou, 510225, ChinaDouble pipe heat exchangers (DPHEs) are widely used in industrial fields, such as refrigeration, heat pumps, and chemical industry, owing to their efficient coupled heat transfer characteristics of evaporation and condensation. In this study, the effects of inner and outer tube diameter combinations and inlet velocity on heat transfer performance, pressure drop, and thermal performance are systematically analyzed through computational fluid dynamic simulation. Results show a significant difference in heat transfer performance under different conditions. At an inlet velocity of 2 ms−1, the total heat transfer coefficient of Case 5 is 66.1 % higher than that of Case 2. Case 3 has the lowest pressure drop among all the cases. Turbulence increases interface renewal, mixing efficiency, and heat transfer efficiency when the inlet velocity is 8 ms−1. When the velocity is 2 ms−1, turbulence is reduced, and the gravity effect dominates across, resulting in a drop in heat transfer efficiency. This study reveals the influence law of inner and outer tube diameters and flow velocity on the coupled heat transfer characteristics, which provides an important theoretical basis and a practical reference for optimizing the design of DPHEs and has significant application in heat-intensive industries.http://www.sciencedirect.com/science/article/pii/S2214157X24016988Double pipe heat exchangerEvaporationCondensationHeat transfer coefficientPressure drop |
| spellingShingle | Junrong Yang Tianming Zhong Xin Yan Haokun Li Zhilin He Haoxian Bai Shiwen Fang Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers Case Studies in Thermal Engineering Double pipe heat exchanger Evaporation Condensation Heat transfer coefficient Pressure drop |
| title | Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers |
| title_full | Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers |
| title_fullStr | Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers |
| title_full_unstemmed | Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers |
| title_short | Numerical study of evaporation–condensation heat transfer in finned double pipe heat exchangers |
| title_sort | numerical study of evaporation condensation heat transfer in finned double pipe heat exchangers |
| topic | Double pipe heat exchanger Evaporation Condensation Heat transfer coefficient Pressure drop |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016988 |
| work_keys_str_mv | AT junrongyang numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT tianmingzhong numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT xinyan numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT haokunli numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT zhilinhe numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT haoxianbai numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers AT shiwenfang numericalstudyofevaporationcondensationheattransferinfinneddoublepipeheatexchangers |