Thickness Dependency of CuO Nanocoating Layer on Thermal Performance of HPHE

摘要

Among the different passive techniques present, surface coating seems to the most effective one. Copper oxide-based materials are of interest on account of their potential uses in many technological fields. Modeling of the nanocoating on fins in Thermosyphon heat exchangers using ANSYS software is introduced. The temperature distribution was investigated. Seven thicknesses of CuO coating layers are used on fins of HPHE with the aim of improving working system. The enhancement is proportioning with the increment in coat thickness at the evaporator section of transient conditions (-16.95, 3.12, 30.66, 52.68, 70.65, 85.55and 98.09) for (10, 25, 50, 75, 100,125and150 µm) thicknesses respectively. From these results, maximum enhancement occurred at150 µm coat. Coat process of the evaporator fins can give fast response of nanofluid to absorb the latent heat from the outdoor air and vaporize to start the closed cycle working system so the increasing in the energy saving is investigated.