Enhancement of pool boiling heat transfer performance using dilute cerium oxide/water nanofluid: An experimental investigation

Abstract

The conflicting opinions regarding the boiling heat transfer performance by utilizing nanofluids are a massive motivation for us to investigate this mechanism. Heat transfer enhancement of heat exchange systems during the nucleate boiling region by using nanofluids could offer a large heat removal in relatively small superheat temperatures, which, in turn, increase the efficiency and save the energy of such heat exchange systems. In the present investigation, pool boiling heat transfer performance from the horizontal copper heated tube using cerium oxide-based water nanofluid was studied experimentally. The boiling curves and pool boiling heat transfer coefficient PBHTC for deionized water and nanofluid at Budapest (Hungary) atmospheric condition introduced in this study. The concentrations of nanoparticles utilized in this study were diluted to disperse the nanoparticles into deionized water within range (0.001–0.04% Vol.). The results demonstrated that the PBHTC for both pure water and nanofluids increased with increasing the applied heat flux, and this due to bubbles formation during the nucleate boiling regime. Besides, the pool boiling heat transfer coefficient of prepared nanofluid enhanced for all volume concentrations, and the more significant improvement reported with volume fraction (0.007% Vol.) of nanofluid to be about 1.7 using PBHTC enhancement ratio (PBHTCnf/PBHTCwater) compared to deionized water at low heat flux.