EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF THE THERMAL PERFORMANCES OF WICKLESS HEAT PIPES USING NANOFLUIDS

Autor/autori: Associate Prof. Gabriela HUMINIC, Associate Prof. Angel HUMINIC


Abstract: In this work, a three-dimensional analysis is used to investigate the heat transfer of a wickless heat pipe using water and nanofluids as the working fluid. The study focused mainly on the effects of volume concentrations of nanoparticles and the operating temperature on the heat transfer performance of the wickless heat pipe using the nanofluids. The analysis was performed for water and Fe2O3 nanoparticles, three volume concentrations of nanoparticles (0%, 2%vol. and 5.3%vol.) and six operating temperatures (50°C, 60°C, 70°C, 80°C, 90°C and 95°C. The numerical results show that the volume concentration of nanoparticles had a significant effect in reducing the temperature difference between the evaporator and condenser. Experimental and numerical results show qualitatively that the wickless heat pipe using the nanofluid has better heat transfer characteristics than the wickless heat pipe using water.

Keywords: Nanoparticle, nanofluids, wickless heat pipe, heat transfer

 

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