A steam power plant operates on the reheat Rankine cycle. as shown in the schematic diagram (Fig. Q 2). Steam enters the high-pressure turbine at 12.5MPa and 550o C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam is then reheated at constant pressure to 450o C before it expands in the low-pressure turbine. The isentropic efficiencies of the turbine and the pump are 85% and 90%, respectively. Steam leaves the condenser as a saturated liquid. If the moisture content of the steam at the exit of the turbine is not to exceed 5%, then make all the necessary assumptions and determine (a) the condenser pressure, (b) the net power output, and (c) the thermal efficiency. Draw an accurate T-s diagram of the cycle and label all the property values on this diagram. ans also comment on answer
A steam power plant operates on the reheat Rankine cycle. as shown in the schematic diagram (Fig. Q 2). Steam enters the high-pressure turbine at 12.5MPa and 550o C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam is then reheated at constant pressure to 450o C before it expands in the low-pressure turbine. The isentropic efficiencies of the turbine and the pump are 85% and 90%, respectively. Steam leaves the condenser as a saturated liquid. If the moisture content of the steam at the exit of the turbine is not to exceed 5%, then make all the necessary assumptions and determine
(a) the condenser pressure,
(b) the net power output, and
(c) the thermal efficiency.
Draw an accurate T-s diagram of the cycle and label all the property values on this diagram.
ans also comment on answer
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