Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser
Flat heat pipes (FHPs) with rectangular groove wick structures fail to sufficiently uplift the working fluid’s liquid meniscus to cover the upper sides of the groove walls due to the vertically flat wall design. This results in the formation of non-evaporative zones, particularly in the evaporator r...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-10-01
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| Series: | Energy Conversion and Management: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590174524001958 |
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| author | Bairi Levi Rakshith Lazarus Godson Asirvatham Appadurai Anitha Angeline Bryan Lancy J Perinba Selvin Raj Jefferson Raja Bose Somchai Wongwises |
| author_facet | Bairi Levi Rakshith Lazarus Godson Asirvatham Appadurai Anitha Angeline Bryan Lancy J Perinba Selvin Raj Jefferson Raja Bose Somchai Wongwises |
| author_sort | Bairi Levi Rakshith |
| collection | DOAJ |
| description | Flat heat pipes (FHPs) with rectangular groove wick structures fail to sufficiently uplift the working fluid’s liquid meniscus to cover the upper sides of the groove walls due to the vertically flat wall design. This results in the formation of non-evaporative zones, particularly in the evaporator region, leading to elevated wall temperatures at high heat loads. To address this issue, a novel FHP with elliptical grooves as wick is designed and tested across heat loads ranging from 30 to 360 W. Elliptical groove depths of 0.5 mm and 0.7 mm are evaluated and compared to FHPs with rectangular grooves. Results showed that at 360 W, the 0.7 mm depth elliptical grooves resulted in 6.5 % reduction in evaporator wall temperature and 27.8 % reduction in thermal resistance, along with 31.5 % enhancement in effective thermal conductivity compared to rectangular grooves. The curvature of the elliptical grooves, combined with enhanced surface tension effects of the working fluid, efficiently uplifted the liquid meniscus to cover the upper wall of the groove, minimizing non-evaporative zones. Additionally, FHPs with elliptical grooves demonstrated lower entropy generation, indicating higher thermal efficiency. Consequently, FHPs with elliptical groove designs are concluded to be an efficient and suitable solution for the thermal management of miniaturized electronic devices. |
| format | Article |
| id | doaj-art-726de2c428384f8f84ddbcaee4755e24 |
| institution | Kabale University |
| issn | 2590-1745 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Conversion and Management: X |
| spelling | doaj-art-726de2c428384f8f84ddbcaee4755e242024-12-18T08:51:22ZengElsevierEnergy Conversion and Management: X2590-17452024-10-0124100717Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenserBairi Levi Rakshith0Lazarus Godson Asirvatham1Appadurai Anitha Angeline2Bryan Lancy3J Perinba Selvin Raj4Jefferson Raja Bose5Somchai Wongwises6Department of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Centre for Research in Material Science and Thermal Management (CRMS &TM), Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Centre for Research in Material Science and Thermal Management (CRMS &TM), Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Corresponding authors at: Department of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India (Lazarus Godson Asirvatham) and Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand (Somchai Wongwises).Department of Robotics Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Centre for Research in Material Science and Thermal Management (CRMS &TM), Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Centre for Research in Material Science and Thermal Management (CRMS &TM), Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India; Centre for Research in Material Science and Thermal Management (CRMS &TM), Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, IndiaDepartment of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi (KMUTT), Bangmod, Bangkok 10140, Thailand; Corresponding authors at: Department of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamil Nadu, India (Lazarus Godson Asirvatham) and Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand (Somchai Wongwises).Flat heat pipes (FHPs) with rectangular groove wick structures fail to sufficiently uplift the working fluid’s liquid meniscus to cover the upper sides of the groove walls due to the vertically flat wall design. This results in the formation of non-evaporative zones, particularly in the evaporator region, leading to elevated wall temperatures at high heat loads. To address this issue, a novel FHP with elliptical grooves as wick is designed and tested across heat loads ranging from 30 to 360 W. Elliptical groove depths of 0.5 mm and 0.7 mm are evaluated and compared to FHPs with rectangular grooves. Results showed that at 360 W, the 0.7 mm depth elliptical grooves resulted in 6.5 % reduction in evaporator wall temperature and 27.8 % reduction in thermal resistance, along with 31.5 % enhancement in effective thermal conductivity compared to rectangular grooves. The curvature of the elliptical grooves, combined with enhanced surface tension effects of the working fluid, efficiently uplifted the liquid meniscus to cover the upper wall of the groove, minimizing non-evaporative zones. Additionally, FHPs with elliptical grooves demonstrated lower entropy generation, indicating higher thermal efficiency. Consequently, FHPs with elliptical groove designs are concluded to be an efficient and suitable solution for the thermal management of miniaturized electronic devices.http://www.sciencedirect.com/science/article/pii/S2590174524001958Thermal managementFlat heat pipeCapillary effectGroove wickElectronic coolingHeat transfer |
| spellingShingle | Bairi Levi Rakshith Lazarus Godson Asirvatham Appadurai Anitha Angeline Bryan Lancy J Perinba Selvin Raj Jefferson Raja Bose Somchai Wongwises Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser Energy Conversion and Management: X Thermal management Flat heat pipe Capillary effect Groove wick Electronic cooling Heat transfer |
| title | Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| title_full | Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| title_fullStr | Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| title_full_unstemmed | Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| title_short | Thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| title_sort | thermal management performance of a novel elliptically grooved flat heat pipe system embedded with internally cooled condenser |
| topic | Thermal management Flat heat pipe Capillary effect Groove wick Electronic cooling Heat transfer |
| url | http://www.sciencedirect.com/science/article/pii/S2590174524001958 |
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