Cooling water tower is a device to cool water, in which the water and the air flowing through the heat exchange, quality exchange, resulting in a drop in water temperature; it is widely used in air conditioning circulating water system and industrial circulating water system. In a certain water treatment situation, the cooling effect is one of the important performance of the cooling tower, in the selection of cooling tower, the main consideration of the degree of cooling, cooling water, wet bulb temperature whether there are special requirements, usually installed in a better ventilated place.