Closed cooling tower is a kind of equipment used in industrial refrigeration and air-conditioning system, its main function is to dissipate the hot water through the cooling tower, so as to reduce the temperature of the water to ensure the normal operation of the system. Closed cooling tower is different from open cooling tower, its internal water flow will not contact with the outside air, so it can avoid water pollution and evaporation loss.
The working principle of the closed cooling tower is as follows:
1. There is a water pump inside the cooling tower, which pumps the hot water out of the system and transports it through the pipeline to the nozzle at the top of the cooling tower.
2. The nozzle sprays the hot water evenly on the internal filler, which is usually made of plastic, to increase the contact area between water and air, thus facilitating the distribution of heat.
3. There is a fan inside the cooling tower, through the role of the fan, the external air into the cooling tower inside, and heat exchange with the hot water, so that the heat away.
4. The cooled water is returned to the system through the lower tank for recycling.
5. In order to prevent water contamination and corrosion, closed cooling towers are usually also equipped with water treatment equipment, such as filters, softeners, sterilizers and so on.
It should be noted that in the use of closed cooling tower, due to the recycling of water, it is easy to produce scale and microbial breeding, so it is necessary to carry out regular testing and treatment of water to ensure the normal operation of the system and the quality of water. At the same time, it is also necessary to regularly clean and maintain the filler and water tank inside the cooling tower to ensure its cooling efficiency and service life.