Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers
Enhancing heat transfer in fin-tube heat exchangers is crucial for improving energy efficiency across various industrial applications. In this study, the effects of the position angle (α), attack angle (β), and size scale (ε) of ellipsoidal protrusions on the heat transfer characteristics of a fin-t...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-10-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25010305 |
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| author | Mun Su Lee Jeong Geun Gwon Young Min Seo Hoon Ki Choi Yong Gap Park |
| author_facet | Mun Su Lee Jeong Geun Gwon Young Min Seo Hoon Ki Choi Yong Gap Park |
| author_sort | Mun Su Lee |
| collection | DOAJ |
| description | Enhancing heat transfer in fin-tube heat exchangers is crucial for improving energy efficiency across various industrial applications. In this study, the effects of the position angle (α), attack angle (β), and size scale (ε) of ellipsoidal protrusions on the heat transfer characteristics of a fin-tube heat exchanger were numerically analyzed within the Reynolds number range of 1500–5000. Results showed that as α and ε increased, the vorticity generated downstream of the protrusions also increased. At α = 45°, heat transfer decreased as β increased, whereas at α = 67.5° and 90°, it increased with β. The Colburn j factor of fins with protrusions increased by 48.85 % compared to that of fins without protrusions at α = 90° and β = 40° with ε = 1.2. At α = 90°, both the Colburn j factor and the friction factor increased significantly; thus, the optimal position was identified as α = 67.5° and β = 40° with ε = 1.2, where the volume goodness factor was 25.41 % higher than that of fins without protrusions. These findings offer valuable insights for designing more efficient fin-tube heat exchangers, with implications for energy conservation in thermal management systems. |
| format | Article |
| id | doaj-art-520ec6cfc6ff4ca28e83faada6de9f05 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-520ec6cfc6ff4ca28e83faada6de9f052025-08-20T03:56:14ZengElsevierCase Studies in Thermal Engineering2214-157X2025-10-017410677010.1016/j.csite.2025.106770Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangersMun Su Lee0Jeong Geun Gwon1Young Min Seo2Hoon Ki Choi3Yong Gap Park4Dept. of Smart Manufacturing Engineering, Changwon National University, Changwon, 51140, South KoreaDept. of Smart Manufacturing Engineering, Changwon National University, Changwon, 51140, South KoreaHydrogen Electric Research Team, Korea Electrotechnology Research Institute, Changwon, 51140, South KoreaSchool of Mechanical Engineering, Changwon National University, Changwon, 51140, South KoreaSchool of Mechanical Engineering, Changwon National University, Changwon, 51140, South Korea; Corresponding author.Enhancing heat transfer in fin-tube heat exchangers is crucial for improving energy efficiency across various industrial applications. In this study, the effects of the position angle (α), attack angle (β), and size scale (ε) of ellipsoidal protrusions on the heat transfer characteristics of a fin-tube heat exchanger were numerically analyzed within the Reynolds number range of 1500–5000. Results showed that as α and ε increased, the vorticity generated downstream of the protrusions also increased. At α = 45°, heat transfer decreased as β increased, whereas at α = 67.5° and 90°, it increased with β. The Colburn j factor of fins with protrusions increased by 48.85 % compared to that of fins without protrusions at α = 90° and β = 40° with ε = 1.2. At α = 90°, both the Colburn j factor and the friction factor increased significantly; thus, the optimal position was identified as α = 67.5° and β = 40° with ε = 1.2, where the volume goodness factor was 25.41 % higher than that of fins without protrusions. These findings offer valuable insights for designing more efficient fin-tube heat exchangers, with implications for energy conservation in thermal management systems.http://www.sciencedirect.com/science/article/pii/S2214157X25010305Fin-tube heat exchangerEllipsoidal protrusionVortex generatorAttack anglePosition angleHeat transfer |
| spellingShingle | Mun Su Lee Jeong Geun Gwon Young Min Seo Hoon Ki Choi Yong Gap Park Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers Case Studies in Thermal Engineering Fin-tube heat exchanger Ellipsoidal protrusion Vortex generator Attack angle Position angle Heat transfer |
| title | Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers |
| title_full | Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers |
| title_fullStr | Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers |
| title_full_unstemmed | Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers |
| title_short | Ellipsoidal protrusions for enhanced thermal performance in fin-tube heat exchangers |
| title_sort | ellipsoidal protrusions for enhanced thermal performance in fin tube heat exchangers |
| topic | Fin-tube heat exchanger Ellipsoidal protrusion Vortex generator Attack angle Position angle Heat transfer |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25010305 |
| work_keys_str_mv | AT munsulee ellipsoidalprotrusionsforenhancedthermalperformanceinfintubeheatexchangers AT jeonggeungwon ellipsoidalprotrusionsforenhancedthermalperformanceinfintubeheatexchangers AT youngminseo ellipsoidalprotrusionsforenhancedthermalperformanceinfintubeheatexchangers AT hoonkichoi ellipsoidalprotrusionsforenhancedthermalperformanceinfintubeheatexchangers AT yonggappark ellipsoidalprotrusionsforenhancedthermalperformanceinfintubeheatexchangers |