Comparative study on the heat transfer performance of micro-grooved anodized thermosyphon with R134a, R600a and R717 for low-temperature applications
| Autor: | I. Darwin Immanuel, A. L. Sriram Sudhan, A. Brusly Solomon |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Spectrum analyzer
Materials science Anodizing Refrigerants R717 (Ammonia) Mechanical Engineering Ecofriendly Heat transfer coefficient Porous coating Refrigerant Electrical discharge machining Mechanics of Materials Inclination angle Heat transfer Original Article Thermosiphon Comparative study Composite material Anodization |
| Zdroj: | Journal of Mechanical Science and Technology |
| ISSN: | 1976-3824 1738-494X |
| Popis: | A comparative heat transfer performance of an internally grooved anodized thermosyphon with eco-friendly refrigerants is presented in this study. Thermosiphons are fabricated with 50 numbers of axial micro-grooves having a width of 500 μm and a depth of 550 μm that is formed using an electrical discharge machining process. The micro-grooved surface was then anodized and characterized using SEM as well as DSA 25 drop shape analyzer. Later, the heat transfer performance of non-anodized grooved thermosyphon is studied by varying fill ratio (20-80 %), inclination angle (0-90°), and heat inputs (5-50 W). The heat transfer coefficient of the thermosyphon is improved by anodization by 20.9 %, 17.2 %, and 18.1 %, respectively, with R717, R134a, and R600a at optimum circumstances (30 % fill ratio and 60° inclination angle). Due to the performance enhancement and zero global warming potential of R717, an anodized surface with the same is recommended for a wide range of heat transfer applications. |
| Databáze: | OpenAIRE |
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