A steam power plant operates on the actual regenerative Rankine cycle with a closed feedwater heater as shown in the figure below. Steam turbine inlet at 2000 kPa and 380 °C and condenser at 40 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure and at point 7, steam is saturated liquid. The isentropic efficiencies of the turbine and the pump are 85 percent and 90 percent, respectively. Calculate; 4 Turbine a. turbine work (W7 , kJ/kg) b. pump work (W, k]/kg) c. heat supply in the boiler (Q;n,k]/kg) d. thermal efficiency of the cycle Boiler Condenser 7 Closed fwh (Pump) 3 2 Note: -Thermodynamic properties that cannot be obtained directly from Thermodynamics Tables will be found by linear interpolation. -Kinetic and potential energy changes are negligible.

A steam power plant operates on the actual regenerative Rankine cycle with a closed feedwater heater as shown in the figure below. Steam turbine inlet at 2000 kPa and 380 °C and condenser at 40 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into the condenser after being throttled to condenser pressure and at point 7, steam is saturated liquid. The isentropic efficiencies of the turbine and the pump are 85 percent and 90 percent, respectively. Calculate; 4 Turbine a. turbine work (W7 , kJ/kg) b. pump work (W, k]/kg) c. heat supply in the boiler (Q;n,k]/kg) d. thermal efficiency of the cycle Boiler Condenser 7 Closed fwh (Pump) 3 2 Note: -Thermodynamic properties that cannot be obtained directly from Thermodynamics Tables will be found by linear interpolation. -Kinetic and potential energy changes are negligible.

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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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

Thermal engineering

7. A steam power plant operates on the actual regenerative Rankine cycle with a closed feedwater
heater as shown in the figure below. Steam turbine inlet at 2000 kPa and 380 °C and condenser at
40 kPa. Steam is extracted at 1000 kPa to serve the closed feedwater heater, which discharges into
the condenser after being throttled to condenser pressure and at point 7, steam is saturated liquid.
The isentropic efficiencies of the turbine and the
pump are 85 percent and 90 percent,
respectively. Calculate;
Turbine
a. turbine work (W7 , kJ/kg)
b. pump work (W,, k]/kg)
c. heat supply in the boiler (Q;n,k]/kg)
d. thermal efficiency of the cycle
5
Boiler
Condenser
7
Closed
fwh
3
2
(Pump
Note:
-Thermodynamic properties that cannot be obtained directly from Thermodynamics Tables
will be found by linear interpolation.
-Kinetic and potential energy changes are negligible.

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