AN ANALYSIS ON EFFICIENCY OF NATURAL DRAFT COOLING TOWER WITH DIFFERENT QUANTITY OF CIRCULATING FLUIDS

Abstract

Cooling towers are evaporative heat transfer devices in which atmospheric air cools warm water with direct contact between the air and the water by evaporating cooling of water. The main objective of this study is to analysis the cooling tower performance, comparing the performance of natural and induced draft cooling tower and finding out the effect of adding toner to circulating cooling fluids. This was done by establishing and modifying experimental set up constructing computer program and varying the quality of circulating fluids by adding together at different ratio. Natural and induced draft cooling tower and computer program gives us the various data required for calculation. From the result obtained a comparative study on terms of tower characteristics (kav/L), water to air flow ratio (L/G), efficiency, range, percentage of make-up water and evaporation heat loss are presented in graphical form. The graph showed that the performance of cooling tower is affected by the type of cooling tower and the quality of circulating fluids. The graphical analysis shows the cooling tower characteristics and efficiency decrease with an increase in (L/G) the induced draft cooling tower shows better performance than natural draft cooling tower. The result also shows that with the adding of toner with water cooling tower performance increase and as tower percentage increases the tower performance also increase.