Cooling Towers
In a power plant large amount of heat is rejected which is a byproduct. This heat can not ignored & it is rejected from the primary system (CW system) to a secondary system (atmosphere). Physically atmosphere is treated as a heat sink in which heat is dumped with the help of air or water. Cooling system are three distinct types:- Once-through cooling :- Waste heat is transfer with the help of cooling water which is receive & discharge to a rivers or lakes sea. Evaporative cooling:- Waste heat is dissipated to the atmosphere by evaporation of a small portion of the cooling water. it require cooling towers. Dry cooling:- Heat is dissipated directly to the atmosphere. it require air cooled heat exchangers. In once through cooling system water is taken from natural resources & after cooling process hot water is dumped in to the again in natural resources so there is a thermal effect on the natural water resources. So once through cooling is then rep