500 MMSCFD of supercritical steam generated in the steam generator (shown in the sketch below) at P=250 bar and T₁=550°C are expanded into a series of two condensing steam turbines (CSTs) to a final pressure of P, = 8 kPa as shown in the diagram below. To improve the efficiency of the cycle, part of the exhaust of the High Pressure (HP) Turbine at P₂ = P, = 40 bar is reheated to T₁ = 550° C and sent to the Low Pressure (LP) Turbine for further expansion, and part is throttled down to P, = 8 bar and mixed with the discharge of the Condensate Pump of the Condenser effluent in the Overflow Feed Water Heater (OFWH) tank in order to preheat the boiler feed water (which also serves as the Deaerator). This power cycle is known as the Regenerative Rankine Cycle with Open Feed Water Heater and it is shown in the diagram below: QH 10 FSTEAM GENERATOR DEAERATOR J OPEN FEED WATER HEATER HP TURBINE FEED WATER PUMP (3) THROTTLING VALVE 8 LOW PRESSURE TURBINE CONDENSATE PUMP CONDENSER If the efficiency of the each turbine is 80% and that of the condensate and boiler feed water

500 MMSCFD of supercritical steam generated in the steam generator (shown in the sketch below) at P=250 bar and T₁=550°C are expanded into a series of two condensing steam turbines (CSTs) to a final pressure of P, = 8 kPa as shown in the diagram below. To improve the efficiency of the cycle, part of the exhaust of the High Pressure (HP) Turbine at P₂ = P, = 40 bar is reheated to T₁ = 550° C and sent to the Low Pressure (LP) Turbine for further expansion, and part is throttled down to P, = 8 bar and mixed with the discharge of the Condensate Pump of the Condenser effluent in the Overflow Feed Water Heater (OFWH) tank in order to preheat the boiler feed water (which also serves as the Deaerator). This power cycle is known as the Regenerative Rankine Cycle with Open Feed Water Heater and it is shown in the diagram below: QH 10 FSTEAM GENERATOR DEAERATOR J OPEN FEED WATER HEATER HP TURBINE FEED WATER PUMP (3) THROTTLING VALVE 8 LOW PRESSURE TURBINE CONDENSATE PUMP CONDENSER If the efficiency of the each turbine is 80% and that of the condensate and boiler feed water

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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Question

FEED WATER
PUMP D
PUMP
If the efficiency of the each turbine is 80% and that of the condensate and boiler feed water
pumps 75% calculate:
Chemical Engineering Thermodynamics
STELLE
Page 2
1.
The flow rate of the steam bypass to the throttling valve (Stream ) in MMSCFD
2. The amount of power generated by the cycle in MW.
3.
The efficiency of the Regenerative Rankine Cycle with OFWH.
4. The amount of cooling water in gpm (gallons per minute) required for the condenser,
assuming a water temperature rise of 11°C. You may take the specific heat capacity of water
to be C₂ = 4.184 kJ / (kg · C).
M
5. If the power plant is using bituminous coal as fuel in the steam generator give an estimate of
the annual CO₂ emissions in tonnes [1 tonne- 1000 kg]. You may take the ash content of
coal to be 15% and the heating value of coal to be approximately 18 MJ/kg. (FYI see Heating
Values of Various Fuels below).
S
HP
Cons
FILME
200
Dane om

500 MMSCFD of supercritical steam generated in the steam generator (shown in the sketch
below) at P=250 bar and T = 550°C are expanded into a series of two condensing steam
turbines (CSTs) to a final pressure of P, = 8 kPa as shown in the diagram below. To improve the
efficiency of the cycle, part of the exhaust of the High Pressure (HP) Turbine at P₂ = P = 40bar
is reheated to T = 550° C and sent to the Low Pressure (LP) Turbine for further expansion, and
part is throttled down to P = 8 bar and mixed with the discharge of the Condensate Pump of the
Condenser effluent in the Overflow Feed Water Heater (OFWH) tank in order to preheat the
boiler feed water (which also serves as the Deaerator). This power cycle is known as the
Regenerative Rankine Cycle with Open Feed Water Heater and it is shown in the diagram
below:
QH
Go
1
STEAM
GENERATOR
TURBINE
DEAERATOR
OPEN
FEED
WATER
HEATER
FEED WATER
PUMP
3
G
THROTTUNG
LOW PRESSURE
TURBINE
8
5
(m)
CONDENSATE
PUMP
Qc
CONDENSER
If the efficiency of the each turbine is 80% and that of the condensate and boiler feed water

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