While ventilation is the simplest way to cool and protect Greenhouse, artificial cooling is necessary when temperatures are too high and natural ventilation is insufficient for crop growth.
Cooling methods include shading, roof water cooling, evaporative cooling, and forced ventilation. Shading is effective for Commercial Greenhouse by hanging shading curtains 40cm away from the greenhouse roof.
Another method involves hanging shading curtains indoors, but this is less effective. Roof water cooling requires consideration of installation costs and the removal of scale buildup on the glass surfaces.
Evaporative cooling involves cooling the air by evaporating water before introducing it into the greenhouse.
Evaporative cooling methods include wet curtain-fan cooling, fine mist cooling, and roof spraying.