Closed Cooling Tower
Closed cooling tower, also known as closed cooling tower, also known as closed cooling tower, abbreviated as closed tower. Closed cooling tower originated from evaporative cooler, but in fact, it is a heat exchanger that combines the performance of water-cooled cooler and conventional cooling tower. It is also a heat exchanger between water cooler and air cooler, so some manufacturers call it "evaporative air cooler". There are many forms of cooling equipment nowadays, and their common feature is spraying water outside the partition heat exchanger and forced ventilation. Heat is transferred from the cooled fluid inside the partition heat exchanger to the spraying water outside the wall through the wall surface, and then transferred to the air through forced convection between the spraying water and air.
The heat transfer of the spraying water to the air is mainly composed of the latent heat of evaporation of the spraying water and the sensible heat exchange between the spraying water and the air. Due to the closed circulation flow of the cooled fluid between the inter wall heat exchanger and the external process equipment, it is called a "closed tower" to distinguish it from general cooling towers where the cooled fluid directly contacts with air. Correspondingly, general cooling towers are called "open towers".
The cooling principle of a closed cooling tower is, in simple terms, two cycles: an inner cycle and an outer cycle. There is no filler, and the main core part is a copper tube surface cooler.
① Internal circulation: Connect with the target device to form a closed circulation system (with soft water as the circulating medium). Cooling the target device by transferring the heat from the target device to the cooling unit.
② External circulation: In the cooling tower, it cools down the cooling tower itself. Not in contact with the internal circulating water phase, only through the copper tube surface cooler in the cooling tower for heat exchange and dissipation. Under this cooling method, the operation of the motor is set according to the water temperature through automatic control. Two cycles are required to run simultaneously in high environmental temperatures during spring and summer. The environmental temperature is not high in autumn and winter, and in most cases only one internal cycle is needed.
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