Cooling Tower Water Treatment – Cooling by Evaporation

When trying to cool something down, there tend to be four main ways that one may use to aid the transference of heating. They are radiation, evaporation convection, together with conduction. In cooling mineral water treatment, we are predominantly concerned with the cooling effect involving evaporation.

In our daily lives, we’re all knowledgeable about the way evaporation cools. When we work up a sweat, our bodies use this procedure to keep us from heating up, and it’s the evaporation in the sweat from our skin that removes heat, cooling people down as it does indeed. This process of cooling by evaporation is known as an endothermic reaction.

In cooling tower water procedure, a cooling water system is designed to remove heat from processes or equipment by switching it to water. The heat absorbed by the water must then be dissipated providing the water to get reused. In an available, evaporative cooling water system, this occurs in this cooling tower or evaporative condenser.

A cooling tower was designed to maximise contact between air and water and, in this, encourage some of the water to evaporate.

The evaporation of simply small proportion of the water cools the remainder. In truth, evaporating just 2% of the water will achieve a 9?? C temperature drop. When water is lost by evaporation this way the mineral content of the remaining water becomes much more concentrated. The higher the amount factor the less water the machine uses as fresh make-up).

Cooling by evaporation this way is relatively energy successful and effectively conserves water by allowing warm water to be cooled and reused, rather than extracted. However, without effective mineral water treatment and usual maintenance, significant problems might arise:

• Cooling by evaporation increases the dissolved solids of the water – raising the probability of corrosion, scale and deposit problems occurring;

• The increase in water temperature raises the potential for corrosion together with scale;

• The retention of tepid to warm water in an open evaporative cooling water system increases the tendency for biological increase;

• A cooling tower is in effect an air-washer and will scrub corrosive gases, microbial nutritional vitamins, micro-organisms and dust from the atmosphere which if untreated can lead to increased corrosion, fouling and microbial problems;

• An evaporative cooling system is potentially a good growth environment for legionella bacteria along with the spray produced in a cooling tower could be the ideal means of generating the aerosols necessary to cause legionnaires’ disease if adequate controls are not maintained.

REFERENCE:

http://www.realestatearticles4u.com/Art/271589/20/Exploring-The-Many-Advantages-Of-Cooling-Towers.html

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