Methods To Improve The Cooling Efficiency Of Closed Cooling Towers

According to the analysis of closed cooling tower sales data, it is found that tower types with high cooling efficiency are more popular with customers, so cooling tower manufacturers have increased research efforts to improve product cooling efficiency. To improve the cooling efficiency of a closed cooling tower, it is necessary to first understand the factors that affect its thermal performance. To this end, people need to carry out physical modeling through various design software, and obtain various research data through simulation experiments. 

According to people's experimental research on closed cooling towers, the main factors affecting its thermal performance are water spray density, ambient temperature and humidity, and air-water ratio. When the water spray density is continuously increased, the temperature difference between the inlet and outlet of the cooling water increases first and then decreases. The reason for the first increase in the temperature difference is that the humidity of the air at the outlet of the cooling tower tends to be saturated with the addition of the water spray density. , the enthalpy difference between the inlet and outlet air reflects the heat exchange between the two phases of gas and water. Under the condition of constant air flow, the addition of the relative humidity of the air at the outlet of the closed cooling tower shows that the air takes more heat from the water spray, thereby increasing the The heat capacity of the cooling tower increases the temperature of the cooling water at the inlet and outlet. When the air at the outlet of the closed cooling tower is saturated and the water density continues to increase, the enthalpy difference between the inlet and outlet air remains unchanged, and the heat taken away by the air remains unchanged. The deterioration of the heat exchange function, the heat exchange capacity of the cooling tower decreases, and the temperature of the cooling water at the inlet and outlet decreases. It can be seen that the higher the spray water density is, the better. When designing a closed cooling tower, it is necessary to model the best spray water density, air-water ratio, and ambient temperature and humidity, and use the standard parameter values. It is marked in the equipment manual for user reference.

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