4 Economics of the steam cycle
4.1 Choice of exhaust pressure
The turbine efficiency depends, to a certain extent, on the choice of turbine exhaust pressure. This choice is based on both thermodynamic and economic grounds. Following consideration of thermodynamic optimisation, the economic factors influencing the whole spectrum of turbine-generator plant optimisation is described.
The form of economic study to permit selection of the turbine exhaust pressure, condenser and cooling water parameters is then given.