Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation
Effective heat dissipation is crucial in various thermal management applications, including electronics, renewable energy systems, and heating and cooling systems. Two-phase closed thermosyphons (TPCTs) are recognized for their efficient heat transfer and have been widely adopted in these fields. Th...
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| Language: | English |
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Elsevier
2025-02-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584402500489X |
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| author | Mohammad Khalili Seyed Alireza Mostafavi Seyed Mohammad Mousavi Hossein Moghadamrad |
| author_facet | Mohammad Khalili Seyed Alireza Mostafavi Seyed Mohammad Mousavi Hossein Moghadamrad |
| author_sort | Mohammad Khalili |
| collection | DOAJ |
| description | Effective heat dissipation is crucial in various thermal management applications, including electronics, renewable energy systems, and heating and cooling systems. Two-phase closed thermosyphons (TPCTs) are recognized for their efficient heat transfer and have been widely adopted in these fields. This study presents a novel design for a TPCT that incorporates a unique internal cone-shaped tube at the evaporator. This innovative feature aims to minimize vapor-liquid interaction within the main tube, potentially leading to enhanced heat transfer efficiency. The proposed TPCT is evaluated against a conventional design using water and ethanol as working fluids. Thermal performance is assessed under varying heat inputs (50 W–250 W) and filling ratios (40 %, 55 %, 70 %, 85 %). The results indicate that the optimal filling ratio depends on the working fluid. Water exhibits the best performance at 55 % and 85 % filling ratios, whereas ethanol achieves its optimum at 70 %. Notably, at a 70 % filling ratio with a 50 W heat input, the novel TPCT design exhibits a significant 45.7 % reduction in thermal resistance compared to the conventional design. As expected, increasing heat input reduces thermal resistance but also elevates operating temperatures for both TPCTs. Notably, the novel TPCT demonstrates a significant improvement in thermal performance compared to the conventional design, particularly when using ethanol as the working fluid. |
| format | Article |
| id | doaj-art-fb9be7cc0ebe4427a2866fff35be8d11 |
| institution | Kabale University |
| issn | 2405-8440 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj-art-fb9be7cc0ebe4427a2866fff35be8d112025-01-26T05:04:16ZengElsevierHeliyon2405-84402025-02-01113e42109Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluationMohammad Khalili0Seyed Alireza Mostafavi1Seyed Mohammad Mousavi2Hossein Moghadamrad3Department of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, Iran; Institute of Advanced Technology, Arak University, P.O.B. 38156-8-8349, Arak, Iran; Corresponding author. Department of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, Iran.Department of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, Iran; Institute of Advanced Technology, Arak University, P.O.B. 38156-8-8349, Arak, Iran; Corresponding author. Department of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, Iran.Department of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, IranDepartment of Mechanical Engineering, Faculty of Engineering, Arak University, P.O.B. 38156-8-8349, Arak, IranEffective heat dissipation is crucial in various thermal management applications, including electronics, renewable energy systems, and heating and cooling systems. Two-phase closed thermosyphons (TPCTs) are recognized for their efficient heat transfer and have been widely adopted in these fields. This study presents a novel design for a TPCT that incorporates a unique internal cone-shaped tube at the evaporator. This innovative feature aims to minimize vapor-liquid interaction within the main tube, potentially leading to enhanced heat transfer efficiency. The proposed TPCT is evaluated against a conventional design using water and ethanol as working fluids. Thermal performance is assessed under varying heat inputs (50 W–250 W) and filling ratios (40 %, 55 %, 70 %, 85 %). The results indicate that the optimal filling ratio depends on the working fluid. Water exhibits the best performance at 55 % and 85 % filling ratios, whereas ethanol achieves its optimum at 70 %. Notably, at a 70 % filling ratio with a 50 W heat input, the novel TPCT design exhibits a significant 45.7 % reduction in thermal resistance compared to the conventional design. As expected, increasing heat input reduces thermal resistance but also elevates operating temperatures for both TPCTs. Notably, the novel TPCT demonstrates a significant improvement in thermal performance compared to the conventional design, particularly when using ethanol as the working fluid.http://www.sciencedirect.com/science/article/pii/S240584402500489XTwo-phase closed thermosyphon (TPCT)Thermal performanceThermal resistanceVapor-liquid interactionWorking fluids |
| spellingShingle | Mohammad Khalili Seyed Alireza Mostafavi Seyed Mohammad Mousavi Hossein Moghadamrad Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation Heliyon Two-phase closed thermosyphon (TPCT) Thermal performance Thermal resistance Vapor-liquid interaction Working fluids |
| title | Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation |
| title_full | Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation |
| title_fullStr | Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation |
| title_full_unstemmed | Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation |
| title_short | Optimizing heat transfer performance in two-phase closed thermosyphons: A novel design and experimental evaluation |
| title_sort | optimizing heat transfer performance in two phase closed thermosyphons a novel design and experimental evaluation |
| topic | Two-phase closed thermosyphon (TPCT) Thermal performance Thermal resistance Vapor-liquid interaction Working fluids |
| url | http://www.sciencedirect.com/science/article/pii/S240584402500489X |
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