Chapter 8, Problem 8.31P

Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1800 lbf/in² and 1200°F and expands to 120 lb/in.2, where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lb/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.² Each turbine stage and both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is at constant pressure. Saturated liquid exits the open feedwater heater at 120 lbf/in.² The mass flow rate of steam entering the first stage of the turbine is 2.42x106 lb/h.

Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1800 lb-/in² and 1200°F and expands to 120 lb/in.², where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lb-/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb-/in.² Each turbine stage and both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is at constant pressure. Saturated liquid exits the open feedwater heater at 120 lb/in.² The mass flow rate of steam entering the first stage of the turbine is 2.42x106 lb/h. Step 1 * Your answer is incorrect. Determine the net power output of the cycle, in Btu/hr. W cycle Hint Save for Later 1203000000 Btu/h Attempts: 3 of 4 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. Step 3 The…

Water is the working fluid in an ideal regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 lbf/in.² and 1600°F and expands to 120 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.2 Condensate exiting the feedwater heater as saturated liquid at 120 lbf/in.² undergoes a throttling process as it passes through a trap into the condenser. The feedwater leaves the heater at 1400 lb/in.² and a temperature equal to the saturation temperature at 120 lbf/in.2 The net power output of the cycle is 288 MW. Step 1 Determine the mass flow rate of steam entering the first stage of the turbine, in lb/h. m₁ i Save for Later lb/h Attempts: 0 of 4 used Submit Answer

Water is the working fluid in an ideal regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 Ib/in.² and 1200°F and expands to 120 lb/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lbs/in.² Condensate exiting the feedwater heater as saturated liquid at 120 lb/in.2 undergoes a throttling process as it passes through a trap into the condenser. The feedwater leaves the heater at 1400 lb/in.2 and a temperature equal to the saturation temperature at 120 lbf/in.2 The net power output of the cycle is 283 MW. Step 1 Determine the mass flow rate of steam entering the first stage of the turbine, in lb/h. Your answer is correct. = 11 = 1730323.25 * Your answer is incorrect. Determine the thermal efficiency of the cycle. lb/h i 0.22

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Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1600 lb-/in² and 1100°F and expands to 120 lb-/in.2, where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.² Each turbine stage and both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is at constant pressure. Saturated liquid exits the open feedwater heater at 120 lb/in.2 The mass flow rate of steam entering the first stage of the turbine is 2.42x106 lb/h. Step 1 Determine the net power output of the cycle, in Btu/hr. W cycle = i Btu/h

Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1600 lb/in² and 1100°F and expands to 120 lb/in.2, where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lb/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.² Each turbine stage and both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is at constant pressure. Saturated liquid exits the open feedwater heater at 120 lb/in. The mass flow rate of steam entering the first stage of the turbine is 2.42x106 lb/h. Step 1 Determine the net power output of the cycle, in Btu/hr. W cycle Hint Your answer is correct. Step 2 1.097-9 Btu/h Determine the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. Btu/h Attempts: 3 of 4 used

Water is the working fluid in an ideal Rankine cycle. Steam enters the turbine at 1400 lbf/in2 and 1400°F. The condenser pressure is 2 lbf/in.2 The net power output of the cycle is 250 MW. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser.

Water is the working fluid in a regenerative Rankine cycle with one open feedwater heater. Steam enters the turbine at 1800 lb-/in² and 1200°F and expands to 120 lb-/in.², where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lb-/in.² The remaining steam expands through the second-stage turbine to the condenser pressure of 2 lb/in.² Each turbine stage and both pumps have isentropic efficiencies of 85%. Flow through the condenser, open feedwater heater, and steam generator is at constant pressure. Saturated liquid exits the open feedwater heater at 120 lb-/in.² The mass flow rate of steam entering the first stage of the turbine is 2.42x10 lb/h. Step 1 Your Answer Correct Answer (Used) * Your answer is incorrect. Determine the net power output of the cycle, in Btu/hr. W cycle = Hint Solution Step 2 Qin 1.201E+9 Determine the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. = i Btu/h Save for Later Btu/h…