The isentropic efficiencies of the turbine and the pump are 85 percent and 90. Steam is then reheated at constant pressure to 450C before it expands in the low-pressure turbine. Steam enters the high-pressure turbine at 12.5 MPa and 550C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam enters the turbine at 10 MPa and 500C and is cooled in the condenser at a pressure of 10 kPa. A steam power plant operates on the reheat Rankine cycle. The turbine work output and the thermal efficiency of the cycle are to be. Consider a 210-MW steam power plant that operates on a simple ideal Rankine cycle.
#CONSIDER A STEAM POWER PLANT THAT OPERATES GENERATOR#
Steam generator Turbine/generator q in q. If the isentropic efficiency of the turbine is 87 percent and the isentropic efficiency of the pump is 85 percent, determine (a) the thermal efficiency of the cycle and (b) the net power output of the plant for a mass flow rate of 15 kg/s. First, the superheated steam (state 1) expands isentropically. To solve this problem we will need the enthalpies at all points of the Rankine cycle.įor the enthalpy \textbf h 4 n the cycle would have if the process was isentropic. A steam power plant that operates on the ideal reheat Rankine cycle is considered. Consider a steam power plant operating on an ideal reheat Rankine cycle. EXAMPLE 102 An Actual Steam Power Cycle A steam power plant operates on the cycle shown in Fig.
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