Theoretical and Experimental Investigation of Heat Transfer Characteristics through a Rectangular Microchannel Heat Sink

Abstract

Investigation of heat transfer characteristics has been carried out by theoretically and experimentally for a straight microchannel heat sink of rectangular cross section of 507µm hydraulic diameter with water as the circulating fluid. The temperature distribution, pressure drop, heat transfer coefficient and total thermal resistance of the heat sink are selected as criteria for their cooling performance. Parameters that changes in this study are Reynolds number in ranges from 200 to 700. The theoretical results for heat transfer coefficient and thermal resistance are compared with the experimental results. The obtained theoretical results are having the good agreement with experimental results. It is found that the temperature of water in the microchannels increases with channel length. The present work proposes an approach to improve the heat transfer enhancement of microchannel heat sinks