THEORETICAL ANALYSIS OF THE PERFORMANCE OF DUAL PRESSURE CONDENSER IN A THERMAL POWER PLANT

The condenser is a large shell-and ? tube type heat exchanger. This is positioned next to the turbine in order to receive a large flow rate of lo w pressure steam. This steam in condenser goes under a phase change from vapour to liquid water. In thermal power plants, the primary purpose of a surface condenser is to condense the exhaust steam from a steam turbine to obtain maximum efficiency , and also to convert the turbine exhaust steam int o pure water (referred to as steam condensate) so that it may be reused in the steam generator or boiler as boiler feed water. A Dual -pressure condenser results in efficiency improvement because the average turbine back pressure is less compared with that of a single-pressure condenser. The average exhaust pressure of the LP turbines becomes lower than the single pressure condenser.