A water-soaked 10-cm 10-cm-square sponge is experiencing parallel dry air flow over its surface. The average

Question:

A water-soaked 10-cm × 10-cm-square sponge is experiencing parallel dry air flow over its surface. The average convection heat transfer coefficient of dry air at 20°C flowing over the sponge surface is estimated to be 30 W/m² . K, and the sponge surface is maintained at 30°C. If the sponge is placed under an array of radiant lamps, determine

(a) The rate of evaporation of water from the sponge

(b) The net radiation heat transfer rate. Dry air 3 Array of radiant lamps Sponge XORPORPORFORATRICI Insulation XXXWW