Principle of the cooling tower and cooling effect and depends on factors

Is the role of the cooling tower to carry waste heat cooling water inside the tower body heat exchange with the air, make the waste heat to the air and into the atmosphere. The general term 'cooling tower' is used to describe the direct ( Open circuit) And indirect ( CCTV) A cooling device. Although most to come up with a 'cooling tower as an open direct contact heat dissipation device', indirect cooling tower, is sometimes referred to as 'closed circuit cooling tower' is but it is also a cooling tower. < / p > < < br / > a direct, or open circuit cooling tower is a means of sealing structure internal, by way of circulating water to spray, spray on glass fiber packing. Filler provides a larger contact area, through contact with air and water, so the heat exchange efficiency. Air circulation, no fan drive tower with heat transfer, the heat flow out of the water to cool down. < / p > indirect or closed circuit cooling tower is not involved in the air and liquid, usually water or ethylene glycol mixture by direct contact cooling. Different is open type cooling tower, cooling tower indirect has two independent fluid circuit. One is the water in the external circuit is in the second circuit, which is outside the tube bundle cycle ( Non-public coil) Connected to the process of hot fluid is cooled and return in closed circuit. Are drawn through the loop in the whole heat pipe air outside the cascading water, provide similar open evaporative cooling tower. In the operation of the heat flow from the internal fluid circuit, through the coil pipe wall, external circuit, and then by some evaporation heat, air and water into the atmosphere. Indirect cooling tower operation, therefore very similar to that of open cooling tower with one exception. This process is cooling fluid in a 'closed loop', not directly exposed to the atmosphere or external circulating water. < br / > by filling up the countercurrent cooling tower air travel or tube bundle, across the water moves downward. In the cross flow cooling tower water level moving through air moves down. < br / > cooling tower has a characteristics, including mechanical ventilation cooling tower of aviation mobile means relying on the electric fan, in order to attract or forced air. Natural ventilation cooling tower using high exhaust chimney provide draft air buoyancy. Fan assisted natural ventilation cooling tower adopts mechanical draft, in order to increase the effect of buoyancy. Many of the early draft cooling tower air generated by wind. < br / > if the cooling water from the cooling tower to reuse, some water must be added to replace or composition, flow of that part of the evaporation. Including pure water due to evaporation, dissolution of minerals and other solid concentration of circulating water tends to increase, unless some dissolved, such as blow solids control means, to provide. Some water also lost and ongoing waste gas ( Drift) Droplets, but it is usually reduced to a very small amount of sample installed baffle device, called a drift, collecting droplet. Make up the amount must be equal to evaporation, blow down and general drift, such as wind blowout and other water leakage losses, to maintain a stable level. < br / > use of cooling tower is to achieve a certain cooling effect, cooling effect depends on the heat sink, fan air volume. Cooling tower water use, ventilation conditions, installation position will also be a certain influence on the effect. Let's look at some of the cooling tower with heat sink and fan air volume on the influence of the cooling system: < br / > a, radiator: are key components in the cooling tower, a small tower in general use PVC sheet extrusion or hot suction, large tower will use wood, the main purpose of the contact surface of air and water, the wind resistance is not affected, the bigger the better, the heat transfer rate is at large at the same time, the heat sink effect on heat transfer effect of the two parameters, mainly is the fin shape and height, in the water tower installation, try not to damage the radiator, so as to avoid heat sink flow not free. < br / > 2, fan air volume: the main tower air flow faster, accelerate the heat transfer of air and water, and take away heat. Fan air volume is mainly influence the wind leaf shape namely wind width length and Angle, the wind leaf, installation Angle, rotational speed and motor speed and transmission ratio, etc. In addition, under the condition of the air flow must be, the same type tower, cooling with a small amount of water is greater than the cooling water cooling effect is better. < br / > < br / > < br >

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