Experimental study of convective heat transfer response to relative humidity in source arrays

Experiments were performed to investigate the effect of relative humidity on heat transfer characteristics in source arrays for different airflow velocities. The source arrays were heat-generating, block-like elements affixed to an insulation substrate. Nusselt number distribution of components exhibited stronger dependence on velocity and same dependence on the row number and relative humidity. The correlations for the effects of Reynolds number and relative humidity on Nusselt number in different regions are presented. The fittness of the correlations are indicated from a comparison with experimental data.