A power plant using a Rankine power generation cycle and steam operates at a temperature of 81.25°C in the condenser, a pressure of 5 MPa in the boiler and a maximum boiler temp of 775°C. The cycle operates at steady state with a mass flow rate of 2.5kg/s. Use the steam tables in the appendix of Sandler (p. 917 to 925). a.) Draw out the cycle, calculate the work required for the pump, the work output by the turbine, the heat into the boiler, and the heat out of the condenser.
A power plant using a Rankine power generation cycle and steam operates at a
temperature of 81.25°C in the condenser, a pressure of 5 MPa in the boiler and a maximum
boiler temp of 775°C. The cycle operates at steady state with a mass flow rate of 2.5kg/s. Use
the steam tables in the appendix of Sandler (p. 917 to 925).
a.) Draw out the cycle, calculate the work required for the pump, the work output by the turbine,
the heat into the boiler, and the heat out of the condenser.
b.) What is the efficiency of this power plant?
c.) If the turbine was only 89% efficient but still adiabatic (only generates 89% of the calculated
work from part b), what is the overall efficiency of the cycle?
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