Thermal performance evaluation of a helically-micro-grooved heat pipe working with water and aqueous Al 2 O 3 nanofluid at different inclination angle and filling ratio
| Autor: | Wael I. A. Aly, M. Fatouh, H.M. Abd El-Hameed, Moustafa A. Elbalshouny |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy Thermal resistance Evaporation Energy Engineering and Power Technology Mechanical engineering 02 engineering and technology Heat transfer coefficient 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Heat pipe Nanofluid Distilled water Thermal Heat transfer 0202 electrical engineering electronic engineering information engineering Composite material 0210 nano-technology |
| Zdroj: | Applied Thermal Engineering. 110:1294-1304 |
| ISSN: | 1359-4311 |
| DOI: | 10.1016/j.applthermaleng.2016.08.130 |
| Popis: | The present work reports the thermal performance of a helically-micro-grooved heat pipe working with water-based alumina nanofluid. The effects of the inclination angle (0°, 30°, 60° and 90°), filling ratio (20, 40, 60 and 80%) and heat input (45:65 W) on heat transfer characteristics of the heat pipe using either distilled water or water-based alumina nanofluid with the volume concentration of Al 2 O 3 nanoparticles of 3.0% are experimentally investigated. Results revealed that the thermal performance of the heat pipe enhances with nanofluid compared to DW and both inclination angle and filling ratio significantly affect the thermal performance of the heat pipe. The evaporation and condensation heat transfer coefficients increase as filling ratio increases, but thermal resistance decreases when filling ratio increases. Moreover, the inclination angle of 60° achieves the best thermal performance of the heat pipe using water or nanofluid. The evaporation and condensation heat transfer coefficients of nanofluid are higher than those of water by 30.4% and 11.1%, respectively, while the thermal resistance of nanofluid is lower than that of water by about 18.2%. |
| Databáze: | OpenAIRE |
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