Critical heat flux (CHF) enhancement of the nanofluids by the electrical explosion of wire in liquids(EEWL) process

Abstract

Nanofluids, dispersed nanoparticles in base fluids, have been drawing the attention as heat transfer fluid for enhancement of the critical heat flux (CHF). The enhancement of CHF contributes to increase the safety margin of the thermal system. In this study, the water-based Ag, CuO, and Al 2O 3 nanofluids were produced by the electrical explosion of wire in liquids. We have been performed pool boiling experiments to characterize the CHF enhancement of the produced Ag, CuO, and Al 2O 3 nanofluids. It is observed that the change of surface morphology contributed to the CHF variation of these metallic nanofluids. The surface characterisitics of the heating wire was observed using field-emission scanning electron microscopy after pool boiling experiment to identify the change of surface properties.