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In the present work, experimental investigation on single-phase liquid flow in straight and zigzag microchannels is performed. The objectives are to investigate experimentally, the effect of influencing parameters on heat transfer coefficient and pressure drop in these microchannels. Parameters are wave length and amplitude of the zigzag microchannel. Experiments are performed for Re range of 100–1000 with water as the working fluid. The measured values of bulk mean temperature and surface temperature are used to calculate the heat transfer coefficient. Experimental results show that the zigzag microchannels have a significant heat transfer enhancement when compared to the straight microchannels. It is further observed that the increase in heat transfer from 58% to 88% in the zigzag microchannels is associated with the increase in pressure drop from 22 to 35% than that of the straight microchannels.

Investigation of heat transfer and fluid flow characteristics in straight and zigzag microchannels with water as working medium