POWER PLANT. Doç.Dr. BURHANETTİN ÇETİN. A power plant is the name given the 'factory' where electricity is generated. The major advance in power plant design was the development of the practical steam turbine by Parsons in 1884. Turbines rapidly superseded steam engines. .
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Doç.Dr. BURHANETTİN ÇETİN
To produce steam, water must be boiled and latent heat of evaporation must be given. Latent heat is the heat or energy required to change the state of a fluid ( i.e. change the state of a liquid to gas) and it does no useful work.
The purpose of a steam turbine is to convert heat energy into mechanical energy.
Steam exhausted from the low pressure steam turbines enters the condenser. The condenser is essentially a heat-exchanger and operated at near vacuum conditions to enhance the pressure drop. So the efficiency improves.
The feedwater pump pumps the liquid water that was condensed in the condenser back into the boiler. The primary working fluid must be pumped at a slightly greater pressure than the boiler pressure to ensure that the fluid enters the boiler.
Cooling towers are very interesting and subtle machines. The shape of a cooling tower is called as 'venturi‘.
The rotating shaft of the steam turbine is coupled to the electrical generator. The speed at which the steam turbine is operated is very important, as this determined the electrical frequency.