Consider a combined gas–steam power plant that has a net power output of 45 MW. The pressure ratio of the gas-turbine cycle is 6. Air enters the compressor at 300 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 8 MPa to 400°C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feed water heater incorporated with the steam cycle operates at a pressure of 0.6 MPa. The condenser pressure is 20 kPa. Assuming all the compression and expansion processes to be 80 isentropic efficiency, determine (a) the mass flow rate ratio of air to steam, (b) the required rate of heat input in the combustion chamber, and(c) the thermal efficiency of the combined cycle.
Consider a combined gas–steam power plant that has a net power output of 45 MW. The pressure ratio of the gas-turbine cycle is 6. Air enters the compressor at 300 K and the turbine at 1400 K. The combustion gases leaving the gas turbine are used to heat the steam at 8 MPa to 400°C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feed water heater incorporated with the steam cycle operates at a pressure of 0.6 MPa. The condenser pressure is 20 kPa. Assuming all the compression and expansion processes to be 80 isentropic efficiency, determine (a) the mass flow rate ratio of air to steam, (b) the required rate of heat input in the combustion chamber, and(c) the thermal efficiency of the combined cycle.
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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![Consider a combined gas-steam power plant that has a net power output of 45
MW. The pressure ratio of the gas-turbine cycle is 6. Air enters the
compressor at 300 K and the turbine at 1400 K. The combustion gases leaving
the gas turbine are used to heat the steam at 8 MPa to 400°C in a heat
exchanger. The combustion gases leave the heat exchanger at 460 K. An open
feed water heater incorporated with the steam cycle operates at a pressure of
0.6 MPa. The condenser pressure is 20 kPa. Assuming all the compression and
expansion processes to be 80 isentropic efficiency, determine (a) the mass flow
rate ratio of air to steam, (b) the required rate of heat input in the combustion
chamber, and(c) the thermal efficiency of the combined cycle.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8f10c59-c1b5-4a16-b2fb-25917e7a7eee%2F93f0c938-a628-430a-a7a9-d1da1ff76ff8%2Fgc132nm_processed.png&w=3840&q=75)
Transcribed Image Text:Consider a combined gas-steam power plant that has a net power output of 45
MW. The pressure ratio of the gas-turbine cycle is 6. Air enters the
compressor at 300 K and the turbine at 1400 K. The combustion gases leaving
the gas turbine are used to heat the steam at 8 MPa to 400°C in a heat
exchanger. The combustion gases leave the heat exchanger at 460 K. An open
feed water heater incorporated with the steam cycle operates at a pressure of
0.6 MPa. The condenser pressure is 20 kPa. Assuming all the compression and
expansion processes to be 80 isentropic efficiency, determine (a) the mass flow
rate ratio of air to steam, (b) the required rate of heat input in the combustion
chamber, and(c) the thermal efficiency of the combined cycle.
![Combustion
chamber
9
10
Gas
turbine
Gas cycle
Compressor
Air
8
12
Heat exchanger
11
in
Exhaust
gases
5
Орen
FWH
Condenser
Pump II
Pump I](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8f10c59-c1b5-4a16-b2fb-25917e7a7eee%2F93f0c938-a628-430a-a7a9-d1da1ff76ff8%2Fvvsv2txl_processed.png&w=3840&q=75)
Transcribed Image Text:Combustion
chamber
9
10
Gas
turbine
Gas cycle
Compressor
Air
8
12
Heat exchanger
11
in
Exhaust
gases
5
Орen
FWH
Condenser
Pump II
Pump I
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