FLOW BOILING STUDIES IN A MICROCHANNEL

Abstract

The extremely high rates of heat transfer obtained by employing microchannels make them an attractive to the conventional methods of heat dissipation,. especially in applications related to the cooling of microelectronics. Due to high performance of electronic components, the heat generation is increasing dramatically. Heat dissipation becomes a significant issue in efficiency promotion and stable operation. Experimental tests were conducted to investigate the characteristics of fluid flow and heat transfer in microchannel. ifefrigerant (R245) was used as a working fluid and flowed through the microchannel of 0.4mm in the experiments. Experimental results of flow characteristics indicated that the flow behavior was in the laminar regime when Re=100-700. The phenomenon shows that the surface roughness, viscosity, and channel geometry have great effects on flow characteristics in microchannels.