The water flows from water tank to the cooling pad and then collected in the gutter of the cooling pad and finally collected in a water tank for reuse. Fig. 1c shows the schematic diagram of the cooling pad. Fans (12 V DC) have been used for flow of air from greenhouse-1 to greenhouse-
2 and from greenhouse-2 to the ambient. Thermal curtain of transmissivity 0.25 has been used in both the greenhouses at a height of 2.0 m.