28-10-2016, 03:12 PM
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ABSTRACT
Overheating of machine elements is common problem in industry. It is caused due to continuous operation of machine and atmospheric conditions of the surroundings. Operation cannot be stopped or in other words the machine cannot be given time to be cooled down and therefore there has to be provision for cooling. Water is the best cooling medium as it is cheap and available in abundance. However it has to be noted that continuous flow of fresh water to the machine is not advisable as it creates great waste. Cooling tower is used to fulfil the purpose of cooling with minimum usage of fresh water. It circulates fresh water for cooling to the machine and uses least make up water that is lost due to evaporation.
Apart from industry cooled water is needed, for example, air conditioners, or power generation. A cooling tower is the equipment used to reduce the temperature of a water stream by extracting heat from water and emitting it to the atmosphere. Cooling towers make use of evaporation whereby some of the water is evaporated into a moving air stream and subsequently discharged into the atmosphere. As a result, the remainder of the water is cooled down significantly. Cooling towers are able to lower the water temperatures more than devices that use only air to reject heat, like the radiator in a car, and are therefore more cost-effective and energy efficient.
An experimental setup is made to encounter major problems associated with present cooling towers and to increase the efficiency of cooling tower.