Introduction to cooling tower equipment

Release Time:

Oct 16,2023

As the name suggests, "cooling tower" refers to a device that can cool water. Water undergoes heat and mass exchange with the flowing air, resulting in a decrease in water temperature.
Cooling tower equipment can be divided into two types: open cooling tower and closed cooling tower.
An open cooling tower is a device that uses the contact between water and air to dissipate waste heat generated in industry or refrigeration and air conditioning through evaporation. The basic principle is that dry (low enthalpy) air enters the cooling tower from the intake network after being pumped by the fan; High temperature water molecules with high saturated vapor partial pressure flow towards low pressure air, and moist (high enthalpy) water is sprayed into the tower by the self seeding water system. When water droplets come into contact with air, on the one hand, due to the direct heat transfer between air and water, and on the other hand, due to the pressure difference between the surface of the water vapor and the air, evaporation occurs under the action of pressure. That is, the sensible heat of water is carried away by heat transfer with unsaturated dry air, and some of the water evaporates to take away the latent heat in the water, thereby achieving the goal of cooling the cooling water.
A closed cooling tower utilizes the contact between water and the coil to transfer heat from the tube wall to the cooling medium inside the coil, achieving the cooling goal. The circulating water in a closed cooling tower only circulates inside the cooling tower and exchanges heat with air for cooling, and then comes into contact with the coil to carry away the heat of the working fluid inside the coil. The water supplement pipe is appropriately filled with water. Compared to an open cooling tower, the obvious feature of a closed cooling tower is the addition of coils. The liquid working fluid that needs to be cooled flows inside the steel coil without direct contact with water, and exchanges heat through the pipe wall.