The atmospheric temperature you mentioned should refer to the ambient temperature, but the cooling temperature limit of the cooling tower is the wet bulb temperature. For example, in Guiyang, Guizhou, the highest temperature in summer is usually 40 degrees. But the maximum. the wet bulb temperature is only 2. If the temperature is above ten degrees, the cooling water can be reduced to more than 20 degrees. Of course, this doesn't violate the second law of thermodynamics. It's just that you confused room temperature and room temperature. wet bulb temperature. There is a problem with the answer above. Thermal power plants generally do not do this. When using closed cooling towers, the unpowered hyperbolic cooling tower is most commonly used.
Power plants often use cooling towerssement. to cool the circulating water. Sometimes hot water can be cooled to a temperature higher than the ambient air temperature, why?
The function of the power plant cooling tower is to use the air flowing from the bottom to the top to cool the water flowing from the top to the bottom. The main function of the cooled water is to send it to the condenser to condense the steam that did the work in the steam turbine into water, and then send it back to the boiler for heating. Without this cooling tower, the steam cannot be condensed into water and returned to the boiler, the thermodynamic cycle of electricity production cannot be established, and the working fluid cannot be recovered. The water in the cooling tower should pass through filters and water distribution devices to filter impurities and distribute it evenly to achieve good heat exchange effects.
The eThe circulating water passing through the cooling tower actually uses airflow to carry heat away from the water, so the water temperature cannot be lower than ambient temperature.
If this is the case, it may be due to water replenishment. For example, if groundwater is used to replenish circulating water, the temperature of the water table will be much lower than the air temperature.