Circulating water passing through the cooling tower actually uses airflow to remove heat 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.
Thermal power plants often use cooling towers to cool circulating water. Sometimes hot water can be cooled to a temperature below the ambient atmospheric temperature.
Thermal energy. Factories A cooling tower is a device used to cool the heat generated during the process of generating electricity. In thermal power plants, thermal energy is usually generated by the combustion of fuels (such as coal, natural gas, etc.), then the thermal energy is converted into steam via a boiler to drive a turbogenerator to produce electricity. During this process, the combustion of the fuel will generate a large amount of heat, and the operation of the generator will also generate a large amount of heat, which must be dissipated through the cooling tower to maintain the normal operation of the equipment.
Specifically, the cooling tower of a thermal power plant mainly reduces the water temperature through water circulation and heat dissipation through evaporation, thereby dissipating heat. The water from the cooling tower will be transported to the top of the tower by the water pipe, then atomized into small water droplets through the nozzle and enter inside the tower with the airflow . Inside the tower, the water droplets are in full contact with the air, didissipating heat through evaporation, dissipating heat, and the water temperature gradually drops. Through the wrapping layer inside the tower body, the contact area between water droplets and air is increased, thereby improving the heat dissipation effect. The cooled water returns to the pool again, is pumped by the circulation pump, and then enters the tower body again for circulation cooling. Through this cyclical process, the cooling tower can dissipate heat to ensure the normal operation of thermal power plant equipment.
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 generally 40 degrees. But the maximum temperature ofwet bulb is only more than 20 degrees, and the cooling water can be reduced to more than 20 degrees. Of course, this doesn't violate the second law of thermodynamics. ambient temperature and wet bulb temperature. The answer above is the question. Thermal power plants generally do not use closed cooling towers. Unpowered hyperbolic cooling towers are most commonly used.