Evaporative Cooling System

Evaporative cooling systems have added advantage in achieving higher comfort level in manufacturing & general engineering industries. Ventilation supply air systems draws the outside air & filter it to the required micron level & distribute air to occupied areas to meet comfort. In evaporative cooling system, the same fresh air system is equipped with a water circulated cooling pad & the filtered dry air at ambient temperature is allowed to pass through cooling pad, their by the dry bulb temperature of air it will brought down and cooled air will be distributed to the occupied areas. Which make more comfort if the occupied area. This is an adiabatic cooling process where large occupied areas to be brought under comfort level. Evaporative cooling system is working with the principle that when the air is passing through water circulated cooling pad, water will be evaporated by taking the energy (heat) from the fresh dry air in an adiabatic process, due to the difference between dry bulb temperature and wet bulb temperature. Energy loses due to change water from liquid to vapour results in reduction of dry bulb temperature of air. These systems are more suitable and efficient where ambient temperature is too high & low RH levels. In case if it use a chilled water spray in the cooling pad in place of normal water the room temperature will be still better & close to air conditioning comfort. This application has a main disadvantage is the relative humidity level will be high (over 70%) which place an important role & can affect the manufacturing process & products where the humidity levels are the criteria. Evaporative cooling system comprises of following Air inlet section Filters Water circulated cooling pad Re circulation water pump with internal water sump Blowers / Air Handing units Ducts Register/grills for distributing the air within the work space