Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe
Recently closed loop pulsating heat pipes have been receiving much attention because of their potential applications in high heat flux micro-electronic systems. They work by self thermal driven oscillation without any mechanical parts. Though they are simple in structure, understanding of the heat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2016-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=39415&issue_ID=225 |
| _version_ | 1818369598181867520 |
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| author | sreenivasa Rao Gupta AVSSKS K. R. Narasimha |
| author_facet | sreenivasa Rao Gupta AVSSKS K. R. Narasimha |
| author_sort | sreenivasa Rao |
| collection | DOAJ |
| description | Recently closed loop pulsating heat pipes have been receiving much attention because of their potential applications in high heat flux micro-electronic systems. They work by self thermal driven oscillation without any mechanical parts. Though they are simple in structure, understanding of the heat transfer mechanism is highly complex having a strong thermo- hydro dynamic coupling governing their performance. In this paper, an experimental study on a closed loop PHP with a single turn has been conducted there by providing vital information regarding parameter dependence on its performance. The PHP is made of brass tube having an internal diameter of 2 mm and outer diameter of 3 mm. The parametric characterization has been done for the variation in internal diameter, fill ratio, working fluid and orientation of the device. The working fluids Acetone, Methanol, Ethanol and Propanol are considered for experimentation with volumetric filling ratios of 50%, 60%, 70% and 80%. Input heat power of 7 to 12 W is varied at the evaporator section. The CLPHP is also verified for its thermal performance at 00, 300 and 600 orientations. The transient and steady state experiments are conducted and operating temperatures are measured using K- type thermocouples. The results highlighted that the thermal performance of a PHPis strongly influenced by change in fill ratios, orientation and heat input. 80% fill ratio yields an effective heat transfer rate for a horizontal mode of operation. Appreciable fluid movement and better heat transfer rate are observed for the 300 orientation of PHP operation. Acetone exhibits better heat transport capability compared to other working fluids in all orientations. |
| first_indexed | 2024-12-13T23:26:23Z |
| format | Article |
| id | doaj.art-90f585f4779249f1814728c36258538b |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-13T23:26:23Z |
| publishDate | 2016-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-90f585f4779249f1814728c36258538b2022-12-21T23:27:33ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722016-01-0192615624.Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipesreenivasa Rao0Gupta AVSSKS1K. R. Narasimha2Jntu college of Engineering,HyderabadJNT University , HyderabadJain UniversityRecently closed loop pulsating heat pipes have been receiving much attention because of their potential applications in high heat flux micro-electronic systems. They work by self thermal driven oscillation without any mechanical parts. Though they are simple in structure, understanding of the heat transfer mechanism is highly complex having a strong thermo- hydro dynamic coupling governing their performance. In this paper, an experimental study on a closed loop PHP with a single turn has been conducted there by providing vital information regarding parameter dependence on its performance. The PHP is made of brass tube having an internal diameter of 2 mm and outer diameter of 3 mm. The parametric characterization has been done for the variation in internal diameter, fill ratio, working fluid and orientation of the device. The working fluids Acetone, Methanol, Ethanol and Propanol are considered for experimentation with volumetric filling ratios of 50%, 60%, 70% and 80%. Input heat power of 7 to 12 W is varied at the evaporator section. The CLPHP is also verified for its thermal performance at 00, 300 and 600 orientations. The transient and steady state experiments are conducted and operating temperatures are measured using K- type thermocouples. The results highlighted that the thermal performance of a PHPis strongly influenced by change in fill ratios, orientation and heat input. 80% fill ratio yields an effective heat transfer rate for a horizontal mode of operation. Appreciable fluid movement and better heat transfer rate are observed for the 300 orientation of PHP operation. Acetone exhibits better heat transport capability compared to other working fluids in all orientations.http://jafmonline.net/JournalArchive/download?file_ID=39415&issue_ID=225Electronics cooling;Pulsating heat pipe (PHP); Water cooling;influencing parameters; Experimental study |
| spellingShingle | sreenivasa Rao Gupta AVSSKS K. R. Narasimha Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe Journal of Applied Fluid Mechanics Electronics cooling;Pulsating heat pipe (PHP); Water cooling;influencing parameters; Experimental study |
| title | Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe |
| title_full | Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe |
| title_fullStr | Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe |
| title_full_unstemmed | Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe |
| title_short | Parametric Characterization on the Thermal Performance of a Closed Loop Pulsating Heat Pipe |
| title_sort | parametric characterization on the thermal performance of a closed loop pulsating heat pipe |
| topic | Electronics cooling;Pulsating heat pipe (PHP); Water cooling;influencing parameters; Experimental study |
| url | http://jafmonline.net/JournalArchive/download?file_ID=39415&issue_ID=225 |
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