Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles
In this work, a shell and tube heat exchanger with inclined trefoil-hole baffles (STHX-IT) is proposed, and the numerical simulation is conducted to investigate the flow and heat transfer characteristics. A shell and tube heat exchanger with segmental baffles (STHX-SG) is also studied for the perfor...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-10-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/21/4138 |
| _version_ | 1817991914164584448 |
|---|---|
| author | Yue Sun Xinting Wang Rui Long Fang Yuan Kun Yang |
| author_facet | Yue Sun Xinting Wang Rui Long Fang Yuan Kun Yang |
| author_sort | Yue Sun |
| collection | DOAJ |
| description | In this work, a shell and tube heat exchanger with inclined trefoil-hole baffles (STHX-IT) is proposed, and the numerical simulation is conducted to investigate the flow and heat transfer characteristics. A shell and tube heat exchanger with segmental baffles (STHX-SG) is also studied for the performance comparison. The results show that the heat transfer coefficient and pressure drop of the STHX-IT is averagely lower by 23.89% and 44.19% than those of the STHX-SG, but the heat transfer coefficient per pressure drop is higher by 36.38% on average. Further, the parametric studies of the inclination angle <i>θ</i>, trefoil-hole number <i>n</i>, and baffle cut <i>δ</i> are carried out for the STHX-IT. According to the numerical results, <i>n</i> and <i>δ</i> have more notable influence on shell side performance than <i>θ</i>. In detail, the heat transfer coefficient and pressure drop decrease slightly with <i>θ</i> increasing, and the overall performance is approximately equal; both the heat transfer coefficient and pressure drop decrease with the respective rising of <i>n</i> and <i>δ</i>, but the comprehensive performance shows a growing trend. Considering the synthetic effects of structural parameters, the multi-objective structure optimization using the genetic algorithm combined with the artificial neural networks is fulfilled. As a result, the Pareto front is obtained to characterize the behaviors of the maximum heat transfer rate and minimum pressure drop. The STHX-IT with the <i>θ</i> = 5.38°, <i>n</i> = 6, and <i>δ</i> = 43% is decided as the optimal solution by the TOPSIS method, whose <i>Q/Δp</i> is 2.34 times as much as that of the original STHX-SG. |
| first_indexed | 2024-04-14T01:19:05Z |
| format | Article |
| id | doaj.art-49bb7fd8976244559a46d8256d5f7e30 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T01:19:05Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-49bb7fd8976244559a46d8256d5f7e302022-12-22T02:20:43ZengMDPI AGEnergies1996-10732019-10-011221413810.3390/en12214138en12214138Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole BafflesYue Sun0Xinting Wang1Rui Long2Fang Yuan3Kun Yang4School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaIn this work, a shell and tube heat exchanger with inclined trefoil-hole baffles (STHX-IT) is proposed, and the numerical simulation is conducted to investigate the flow and heat transfer characteristics. A shell and tube heat exchanger with segmental baffles (STHX-SG) is also studied for the performance comparison. The results show that the heat transfer coefficient and pressure drop of the STHX-IT is averagely lower by 23.89% and 44.19% than those of the STHX-SG, but the heat transfer coefficient per pressure drop is higher by 36.38% on average. Further, the parametric studies of the inclination angle <i>θ</i>, trefoil-hole number <i>n</i>, and baffle cut <i>δ</i> are carried out for the STHX-IT. According to the numerical results, <i>n</i> and <i>δ</i> have more notable influence on shell side performance than <i>θ</i>. In detail, the heat transfer coefficient and pressure drop decrease slightly with <i>θ</i> increasing, and the overall performance is approximately equal; both the heat transfer coefficient and pressure drop decrease with the respective rising of <i>n</i> and <i>δ</i>, but the comprehensive performance shows a growing trend. Considering the synthetic effects of structural parameters, the multi-objective structure optimization using the genetic algorithm combined with the artificial neural networks is fulfilled. As a result, the Pareto front is obtained to characterize the behaviors of the maximum heat transfer rate and minimum pressure drop. The STHX-IT with the <i>θ</i> = 5.38°, <i>n</i> = 6, and <i>δ</i> = 43% is decided as the optimal solution by the TOPSIS method, whose <i>Q/Δp</i> is 2.34 times as much as that of the original STHX-SG.https://www.mdpi.com/1996-1073/12/21/4138shell and tube heat exchangernumerical simulationheat transfer enhancementartificial neural networkmulti-objective genetic algorithm |
| spellingShingle | Yue Sun Xinting Wang Rui Long Fang Yuan Kun Yang Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles Energies shell and tube heat exchanger numerical simulation heat transfer enhancement artificial neural network multi-objective genetic algorithm |
| title | Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles |
| title_full | Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles |
| title_fullStr | Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles |
| title_full_unstemmed | Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles |
| title_short | Numerical Investigation and Optimization on Shell Side Performance of A Shell and Tube Heat Exchanger with Inclined Trefoil-Hole Baffles |
| title_sort | numerical investigation and optimization on shell side performance of a shell and tube heat exchanger with inclined trefoil hole baffles |
| topic | shell and tube heat exchanger numerical simulation heat transfer enhancement artificial neural network multi-objective genetic algorithm |
| url | https://www.mdpi.com/1996-1073/12/21/4138 |
| work_keys_str_mv | AT yuesun numericalinvestigationandoptimizationonshellsideperformanceofashellandtubeheatexchangerwithinclinedtrefoilholebaffles AT xintingwang numericalinvestigationandoptimizationonshellsideperformanceofashellandtubeheatexchangerwithinclinedtrefoilholebaffles AT ruilong numericalinvestigationandoptimizationonshellsideperformanceofashellandtubeheatexchangerwithinclinedtrefoilholebaffles AT fangyuan numericalinvestigationandoptimizationonshellsideperformanceofashellandtubeheatexchangerwithinclinedtrefoilholebaffles AT kunyang numericalinvestigationandoptimizationonshellsideperformanceofashellandtubeheatexchangerwithinclinedtrefoilholebaffles |