The Rankine cycle with one closed feedwater heater (CFWH). Superheated water vapor enters the turbine at 16 MPa, 520°C and the condenser pressure is 10 kPa. The mass flow rate of steam entering the turbine is 25 kg/s. The CFWH uses extracted steam at 6 MPa. Saturated liquid condensate drains from the CFWH at 6 MPa and is trapped with an expansion valve/trap at 10 kPa into the condenser. The feedwater leaves the CFWH at 16 MP and at a temperature that is equal to the saturation temperature at 6 MPa, Saturated liquid leaves the condenser at 10 kPa. No detailed property table is required. Assume that hT1 = 85%, hT2 = 85%, and hP1= 80%, determine the following: Specific Enthalpy at the turbine entry point. (h1,kj/kg) Specific enthalpy (h2 and h2,kj/kg at the extraction location(use reasonable numbers for the calculation) Specific Enthalpies (h3 and h3,kj/kg) at the exist of turbine 2 (T2). Specific volume and specific enthalpy at the condensers exit point. Specific enthalpy at the pump exit. Temperature (Celsius) and specific enthalpy of the fluid existing the closed feedwater heater toward the steam generator. Specific enthalpy of the condensate exiting the CFWH Specific enthalpy of the condensate exiting the trap valve. Show the all states and process in the T-s diagram The steam mass fraction bled into the closed feedwater heater The total turbine power (Wdot) and pump power (Wdot) in kw and the back work ratio as a percentage. The rate of heat transfer (Qdot) provided into the steam generator in kw. The thermnal efficiency of the power plant as a percentage

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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The Rankine cycle with one closed feedwater heater (CFWH). Superheated water vapor enters the turbine at 16 MPa, 520°C and the condenser pressure is 10 kPa. The mass flow rate of steam entering the turbine is 25 kg/s. The CFWH uses extracted steam at 6 MPa. Saturated liquid condensate drains from the CFWH at 6 MPa and is trapped with an expansion valve/trap at 10 kPa into the condenser. The feedwater leaves the CFWH at 16 MP and at a temperature that is equal to the saturation temperature at 6 MPa, Saturated liquid leaves the condenser at 10 kPa. No detailed property table is required. Assume that hT₁ = 85%, hT₂ = 85%, and hP₁= 80%, determine the following:

Specific Enthalpy at the turbine entry point. (h₁,kj/kg)

Specific enthalpy (h₂ and h₂,kj/kg at the extraction location(use reasonable numbers for the calculation)
Specific Enthalpies (h₃ and h₃,kj/kg) at the exist of turbine 2 (T₂).
Specific volume and specific enthalpy at the condensers exit point.
Specific enthalpy at the pump exit.
Temperature (Celsius) and specific enthalpy of the fluid existing the closed feedwater heater toward the steam generator.
Specific enthalpy of the condensate exiting the CFWH
Specific enthalpy of the condensate exiting the trap valve.
Show the all states and process in the T-s diagram
The steam mass fraction bled into the closed feedwater heater
The total turbine power (Wdot) and pump power (Wdot) in kw and the back work ratio as a percentage.
The rate of heat transfer (Qdot) provided into the steam generator in kw.
The thermnal efficiency of the power plant as a percentage

STEAM GEN
T1
T2
(1)
3
2
(1-y)
(v)
CFWH
P1
CONDENSER
(1)
(1)
(1)
Expansion Valve/Trap
7
(y)
(y)

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