Evaporative Condenser
- The sketch of an evaporative condenser is shown in Figure.
- The advantage of such condenser is that it needs very small amount of circulating water and the make up water since the coolant is used again and again.
- However these condensers are only suitable for small power plants.
- In this, the exhaust steam is passed through a series of gilled tubes called condenser coils while a thin film of cooling water trickles over these tubes continuously from water nozzles, During the condensation of steam, this thin film of water is evaporated and the remainder of water is collected in the water tank.
- The condensate is extracted with the help of wet air pump. The air passing over the tubes carries the evaporated water in the form of vapour and it is removed with the help of induced draft fan installed at the top.