Consider an ideal steam regenerative Rankine cycle with two feedwater heaters, one closed Steam enters the turbine at 12.5 MPa and 550°C and exhausts to the condenser at 10 kPa. Steam, is 'extracted from the turbine at 0.8 MPa for the closed feedwa seater heater and at 0.3 MPa for the open one. The feedwater is heated to the condensation temperature of the extracted steam in the closed feedwater heater. The extracted steam leaves the closed feedwater heater as a saturated liquid, which is subse- quently throttled to the open feedwäter heater, Show the cycle on a T-s diagram with respect to saturation lines, and deter- mine (a) the mass flow rate of steam through the boiler for a net power output of 250 MW and (b) the thermal efficiency and one of the cycle.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Consider an ideal steam regenerative Rankine cycle with two feedwater heaters, one closed Steam enters the turbine at 12.5 MPa and 550°C and exhausts to the condenser at 10 kPa. Steam, is 'extracted from the turbine at 0.8 MPa for the closed feedwa seater heater and at 0.3 MPa for the open one. The feedwater is heated to the condensation temperature of the extracted steam in the closed feedwater heater. The extracted steam leaves the closed feedwater heater as a saturated liquid, which is subse- quently throttled to the open feedwäter heater, Show the cycle on a T-s diagram with respect to saturation lines, and deter- mine (a) the mass flow rate of steam through the boiler for a net power output of 250 MW and (b) the thermal efficiency and one of the cycle.
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