Cooling tower is a comprehensive product

 Cooling tower is a comprehensive product integrating aerodynamics, thermodynamics, fluidics, chemistry, biochemistry, materials science, static and dynamic structural mechanics, processing technology and other disciplines.

1. The closed cooling tower is a modification and development of the traditional cooling tower. It is actually a combination of an evaporative cooling tower, a cooler and a wet cooling tower. It is a horizontal evaporative cooling tower. The process fluid flows inside the tube and the air flows outside the tube. The two do not touch each other. After the water in the reservoir at the bottom of the tower is pumped by the circulating pump, it is sent to the outside of the pipe to be evenly sprayed down. It is not in contact with the hot water or refrigerant of the process fluid and the air outside the pipe, and becomes a closed cooling tower. The effect of heat and mass transfer is enhanced by spraying water.

2. The closed cooling tower is suitable for various cooling systems that require high circulating water quality, and has application prospects in electric power, chemical industry, steel, food and many industrial sectors. On the other hand, compared with air-cooled heat exchangers, evaporative cooling towers use the latent heat of evaporation of the water on the lower side of the tube to significantly enhance heat and mass transfer on the air side, which also has obvious advantages.

The closed cooling tower (also called evaporative air cooler) puts the tube heat exchanger in the tower, and ensures the cooling effect through the heat exchange of circulating air, spray water and circulating water. Because it is a closed cycle, it can ensure that the water quality is not polluted, well protect the efficient operation of the main equipment, and increase the service life. When the outside temperature is low, the sprinkler system can be stopped to save water. Pushing the implementation of national energy-saving and emission-reduction policies and the increasing scarcity of water resources, closed cooling towers have been widely used in industries such as iron and steel metallurgy, power electronics, mechanical processing, and air conditioning systems. The winter temperature in the northern region is usually below zero, and the problem of frost prevention in the operation of closed cooling towers has become increasingly prominent. If it is not solved well, the heat exchange tubes or other parts of the cooling tower may be damaged by freezing. According to different process characteristics, some closed cooling towers run all day in winter, some run for part of the time, and some are almost not used. But all need to consider the issue of antifreeze.