Chapter 8, Problem 8.44P

Water is the working fluid in a regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 1000°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 5 lbf/in.2 Each turbine stage and the pump have isentropic efficiencies of 80%. Flow through the condenser, closed feedwater heater, and steam generator is at constant pressure. 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 lbf/in.2 and a temperature equal to the saturation temperature at 120 lbf/in.2 The net power output of the cycle is 1 x 109 Btu/h.Determine for the cycle:(a) the mass flow rate of steam entering the first stage of the turbine, in lb/h.(b) the rate of heat transfer, in Btu/h, to…

Water is the working fluid in a regenerative Rankine cycle with one closed feedwater heater and one open feedwater heater. Steam enters the turbine at 1600 lbf/in.2 and 950°F and expands to 400 lbf/in.?, where part of the steam is extracted and diverted into the closed feedwater heater. Condensate exiting the closed feedwater heater as saturated liquid at 400 lbf/in.2 is trapped into the open feedwater heater operating at 140 lbf/in.2 The feedwater leaves the closed feedwater heater at 1600 lbf/in.? and a temperature equal to the saturation temperature at 400 Ibf/in.2 The remaining steam expands through the second-stage turbine to 140 lbf/in.?, where some of the steam is extracted and diverted to the open feedwater heater. Saturated liquid exits the open feedwater heater at 140 lbf/in.? The remaining steam expands through the third-stage turbine to the condenser pressure of 1.5 lbf/in.? The turbine stages operate adiabatically with isentropic efficiencies of 88%, and the pumps each…

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 1600°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 lb/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 * Your answer is incorrect. Determine the mass flow rate of steam entering the first stage of the turbine, in lb/h. 1.346 lb/h Attempts: 1 of 4 used 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 parts of this question must he…

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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 a reheat-regenerative Rankine cycle with one closed feedwater heater and one open feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 1000°F and expands to 500 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. Condensate exiting the closed feedwater heater as saturated liquid at 500 lbf/in.² undergoes a throttling process to 120 lbf/in.² as it passes through a trap into the open feedwater heater. The feedwater leaves the closed feedwater heater at 1400 lbf/in.² and a temperature equal to the saturation temperature at 500 lbf/in.² The remaining steam is reheated to 900°F before entering the second-stage turbine, where it expands to 120 lbf/in.² Some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.² Saturated liquid exits the open feedwater heater at 120 lbf/in.² The remaining steam expands through the third-stage turbine to the condenser pressure of 2 lbf/in.2…

Water is the working fluid in a regenerative Rankine cycle with one closed feedwater heater and one open feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 1300°F and expands to 500 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. Condensate exiting the closed feedwater heater as saturated liquid at 500 lbf/in.2 undergoes a throttling process to 120 lbf/in.² as it passes through a trap into the open feedwater heater. The feedwater leaves the closed feedwater heater at 1400 lbf/in.² and a temperature equal to the saturation temperature at 500 lbf/in.² The remaining steam expands through the second-stage turbine to 120 lbf/in.2, where some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.² Saturated liquid exits the open feedwater heater at 120 lbf/in.² The remaining steam expands through the third-stage turbine to the condenser pressure of 5 lbf/in.2 The turbine stages and the pumps each…

Water is the working fluid in a reheat-regenerative Rankine cycle with one closed feedwater heater and one open feedwater heater. Steam enters the turbine at 1400 lbf/in.2 and 1000°F and expands to 500 lbf/in.2, where some of the steam is extracted and diverted to the closed feedwater heater. Condensate exiting the closed feedwater heater as saturated liquid at 500 lbf/in.2 undergoes a throttling process to 120 lbf/in.2 as it passes through a trap into the open feedwater heater.The feedwater leaves the closed feedwater heater at 1400 lbf/in.2 and a temperature equal to the saturation temperature at 500 lbf/in.2 The remaining steam is reheated to 900°F before entering the second-stage turbine, where it expands to 120 lbf/in.2 Some of the steam is extracted and diverted to the open feedwater heater operating at 120 lbf/in.2 Saturated liquid exits the open feedwater heater at 120 lbf/in.2The remaining steam expands through the third-stage turbine to the condenser pressure of 2 lbf/in.2…

Water is the working fluid in an ideal regenerative Rankine cycle with one closed feedwater heater. Steam enters the turbine at 1400 lb/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 lb/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. m₁ = Hint Step 2 Your answer is correct. ein = 1719859.037 Determine the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. lb/h i Btu/h Attempts: 1 of 4 used