Combined cycle power plant consists of Rankine and Brayton cycles the data for Rankine cycle are; condenser pressure 10 kPa, turbine inlet pressure is 12.5 MPa, and the isentropic pump efficiency is 85%; turbine inlet temperature is 500 C and the isentropic turbine efficiency is 87%. The following data are known for Brayton cycle. Air enters the compressor at 100 kPa, 25°C, the compressor pressure ratio is 14, and the isentropic compressor efficiency is 87%; the heater input rate is 60 MW; the turbine inlet temperature is 1250°C, the exhaust pressure is 100 kPa, and the isentropic turbine efficiency is 87%; the cycle exhaust temperature from the heat exchanger is 200°C. Determine a. The mass flow rate of air in the gas-turbine cycle. b. The mass flow rate of water in the steam cycle. c. The overall thermal efficiency of the combined cycle.

Combined cycle power plant consists of Rankine and Brayton cycles the data for Rankine cycle are; condenser pressure 10 kPa, turbine inlet pressure is 12.5 MPa, and the isentropic pump efficiency is 85%; turbine inlet temperature is 500 C and the isentropic turbine efficiency is 87%. The following data are known for Brayton cycle. Air enters the compressor at 100 kPa, 25°C, the compressor pressure ratio is 14, and the isentropic compressor efficiency is 87%; the heater input rate is 60 MW; the turbine inlet temperature is 1250°C, the exhaust pressure is 100 kPa, and the isentropic turbine efficiency is 87%; the cycle exhaust temperature from the heat exchanger is 200°C. Determine a. The mass flow rate of air in the gas-turbine cycle. b. The mass flow rate of water in the steam cycle. c. The overall 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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Question

Combined cycle power plant consists of Rankine and Brayton cycles the data for Rankine
cycle are; condenser pressure 10 kPa, turbine inlet pressure is 12.5 MPa, and the isentropic
pump efficiency is 85%; turbine inlet temperature is 500 C and the isentropic turbine
efficiency is 87%. The following data are known for Brayton cycle. Air enters the
compressor at 100 kPa, 25°C, the compressor pressure ratio is 14, and the isentropic
compressor efficiency is 87%; the heater input rate is 60 MW; the turbine inlet temperature
is 1250°C, the exhaust pressure is 100 kPa, and the isentropic turbine efficiency is 87%;
the cycle exhaust temperature from the heat exchanger is 200°C. Determine
a. The mass flow rate of air in the gas-turbine cycle.
b. The mass flow rate of water in the steam cycle.
c. The overall thermal efficiency of the combined cycle.

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