The general answer is:
Closed cooling tower, also known as closed cooling tower or evaporative air cooler, is to put a tube heat exchanger in the tower, and ensure the cooling effect through the heat exchange of circulating air, spray water and circulating water.
the advantage of closed cooling tower is that it can ensure that circulating water is not polluted by the outside world, avoid the damage of scale, algae and impurities to the equipment, and improve the operating efficiency and service life of the equipment.
The disadvantages of closed cooling tower are high cost and large area, so it is necessary to clean the heat exchanger and spray system regularly.