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16. [20 Marks] A steam power plant that operates on the ideal regenerative Rankine cyclow. Steam enters the turbine with a mas feedwater heater (fwh)
16. [20 Marks] A steam power plant that operates on the ideal regenerative Rankine cyclow. Steam enters the turbine with a mas feedwater heater (fwh) is shown in the Figure below. Steam enters 0C (Stream 5 ). Parl of flow rate of 20kg/s at a pressure of 8MPa and a temperature the turbine at 1 MPa and is sent the steam (at a mass flow rate of 5kg/s ) is cx). The remaining steam leaves the turbin 6 ). Assume that the pumps and turbine are reversible and adiabatic, and that there are no pressure to the open feedwater heater (Stream 7). drops in the boiler, condenser and open feedwater heater. Assume that saturated liquid leaves the condenser and open feedwater heater: Assume steady flow, negligible kinetic and potential energies. (a) Determine the net power input to pump 1, and pump 2 , in kW. Given that h6=2995.46kJ/kg (b) Determine the rate of heat input to the boiler, in kW. (c) Determine the quality of the steam leaving the turbine at Stream 7. d) Determine the power output of the turbine, in kW. Determine the thermal efficiency of the cycle. Show the process on a well labeled Ts diagram. (You do not need to show numeri values, but Streams 1 to 7 must be clearly shown relative to the saturation lines) 16. [20 Marks] A steam power plant that operates on the ideal regenerative Rankine cyclow. Steam enters the turbine with a mas feedwater heater (fwh) is shown in the Figure below. Steam enters 0C (Stream 5 ). Parl of flow rate of 20kg/s at a pressure of 8MPa and a temperature the turbine at 1 MPa and is sent the steam (at a mass flow rate of 5kg/s ) is cx). The remaining steam leaves the turbin 6 ). Assume that the pumps and turbine are reversible and adiabatic, and that there are no pressure to the open feedwater heater (Stream 7). drops in the boiler, condenser and open feedwater heater. Assume that saturated liquid leaves the condenser and open feedwater heater: Assume steady flow, negligible kinetic and potential energies. (a) Determine the net power input to pump 1, and pump 2 , in kW. Given that h6=2995.46kJ/kg (b) Determine the rate of heat input to the boiler, in kW. (c) Determine the quality of the steam leaving the turbine at Stream 7. d) Determine the power output of the turbine, in kW. Determine the thermal efficiency of the cycle. Show the process on a well labeled Ts diagram. (You do not need to show numeri values, but Streams 1 to 7 must be clearly shown relative to the saturation lines)
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