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 lbf/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 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 lbf/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

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In a reheat-regenerative Rankine cycle, the condenser pressure is 20 KPa. Steam enters the high pressure turbine at 5 MPa and 600 C. The isentropic efficiency of the pump is 80 % while the isentropic efficiency of the turbine is 82%. Steam is reheated at 1.2 MPa and 400 C. For the regeneration, steam is extracted at 500 kPa for a closed feed water heater (CFWH) where the liquid exiting is throttled. Assume that the exits of the CFWH have the same temperature.
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In a reheat-regenerative Rankine cycle, the condenser pressure is 20 KPa. Steam enters the high pressure turbine at 5 MPa and 600 C. The isentropic efficiency of the pump is 91 % while the isentropic efficiency of the turbine is 87 %. Steam is reheated at 1.2 MPa and 500 C. For the regeneration, steam is extracted at 500 kPa for a closed feed water heater (CFWH) where the liquid exiting is throttled. Assume that the exits of the CFWH have the same temperature. Draw the schematic and T-S diagrams. Label the points by setting point 1 after the condenser, point 2 after the 1st pump, point 3 after the CFWH (horizontal exit), point 4 after the boiler, point 5 before the reheater, point 6 after the reheater, point 7 for the extraction of steam for CFWH, point 8 before the condenser, point 9 after the CFWH (vertical exit) and point 10 after throttling. Label the mass extracted for the CFWH as m1. For the actual enthalpies (due to isentropic efficiencies), use labels such as h2', h5', h7' and…
6 Water is the working fluid in an ideal regenerative Rankine cycle with one open 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 open feedwater heater operating at 120 lbf/in.2 The remaining steam expands through the second-stage turbine to the condenser pressure of 6 lbf/in.2 Saturated liquid exits the open feedwater heater at 120 lbf/in.2 The net power output of the cycle is 1 x 108 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 the working fluid passing through the steam generator.(c) the percent thermal efficiency.
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In a reheat-regenerative Rankine cycle, the condenser pressure is 20 KPa. Steam enters the high pressure turbine at 5 MPa and 600 C. The isentropic efficiency of the pump is 87 % while the isentropic efficiency of the turbine is 91 %. Steam is reheated at 1 MPa and 400 C. For the regeneration, steam is extracted at 500 kPa for a closed feed water heater (CFWH) where the liquid exiting is throttled. Assume that the exits of the CFWH have the same temperature. Draw the schematic and T-S diagrams. Label the points by setting point 1 after the condenser, point 2 after the 1st pump, point 3 after the CFWH (horizontal exit), point 4 after the boiler, point 5 before the reheater, point 6 after the reheater, point 7 for the extraction of steam for CFWH, point 8 before the condenser, point 9 after the CFWH (vertical exit) and point 10 after throttling. Label the mass extracted for the CFWH as m1. For the actual enthalpies (due to isentropic efficiencies), use labels such as h2', h5', h7' and…
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…
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