A steam power plant operates between a boiler pressure of 42 bar and a condenser pressure of 0.035 bar. Calculate for these limits the cycle efficiency, the work ratio (ratio of net-work to gross work) and the SSC for
a Carnot cycle using wet steam;
a Rankine cycle with dry saturated steam at entry to the turbine; and
a Rankine cycle of (
, when the expansion process has a isentropic efficiency of 80%Draw T/S diagrams for the above cases. The SSC is the steam flow, which is
SSC = 3600/Wnet
where Wnet is in kJ/kg.
Compare the Rankine cycle performance of the above problem with that obtained when the steam is superheated to 500 ºC. Neglect the feed pump.