Experimental Investigation of Heat Transfer Characteristics and Cooling Performance of Mini- and Microheat Exchangers

摘要

This paper presents an experimental investigation of forced convection heat transfer in two heat sinks for electronic system cooling and investigated the comparisons of the thermal behavior of the mini- and microchannel heat exchangers. The hydraulic dimension of one of the heat sinks is 2 mm while that of the other is 180μm. Deionized water was used as the working fluid for studies conducted in both the heat exchangers. The effect of heat flux and volumetric flow rate (in laminar flow regime) on temperature and heat transfer coefficient is studied. Irrespective of the average heat transfer coefficient and the total thermal resistance, advantages and limitations of each device are analyzed and discussed in the light of experimental results. Furthermore, the results obtained from the experiments were in good agreement with those obtained from the design theory analyses.