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B. At the design speed the following data apply to a gas turbine set employing the heat exchanger: Isentropic efficiency of compressor = 75%, isentropic efficiency of the turbine = 85%, mechanical transmission effi- ciency = 99%, combustion efficiency = 98%, mass flow = 22.7 kg/s, pressure ratio = 6: 1, heat exchanger effectiveness = 75%, maximum cycle temperature = 1000 K. The ambient air temperature and pressure are 15°C and 1.013 bar respectively. Calculate : (i) The net power output (iii) Thermal efficiency of the cycle. Take the lower calorific value of fuel as 43125 kJ/kg and assume no pressure-loss in heat exchanger and combustion chamber. (ii) Specific fuel consumption (Ans. (i) 2019 kW (ü) 0.4799 kg/kWh (iii) 16.7%)

B. At the design speed the following data apply to a gas turbine set employing the heat exchanger: Isentropic efficiency of compressor = 75%, isentropic efficiency of the turbine = 85%, mechanical transmission effi- ciency = 99%, combustion efficiency = 98%, mass flow = 22.7 kg/s, pressure ratio = 6: 1, heat exchanger effectiveness = 75%, maximum cycle temperature = 1000 K. The ambient air temperature and pressure are 15°C and 1.013 bar respectively. Calculate : (i) The net power output (iii) Thermal efficiency of the cycle. Take the lower calorific value of fuel as 43125 kJ/kg and assume no pressure-loss in heat exchanger and combustion chamber. (ii) Specific fuel consumption (Ans. (i) 2019 kW (ü) 0.4799 kg/kWh (iii) 16.7%)

Elements Of Electromagnetics
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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26. At the design speed the following data apply to a gas turbine set employing the heat exchanger : Isentropic efficiency of compressor = 75%, isentropic efficiency of the turbine = 85%, mechanical transmission effi- ciency = 99%, combustion efficiency = 98%, mass flow = 22.7 kg/s, pressure ratio = 6 : 1, heat exchanger effectiveness = 75%, maximum cycle temperature = 1000 K. The ambient air temperature and pressure are 15°C and 1.013 bar respectively. Caleulate : (i) The net power output (iii) Thermal efficiency of the cycle. Take the lower calorific value of fuel as 43125 kJ/kg and assume no pressure-loss in heat exchanger and combustion chamber. (ii) Specific fuel consumption (Ans. (i) 2019 kW (iü) 0.4799 kg/kWh (iii) 16.7%)
Transcribed Image Text:26. At the design speed the following data apply to a gas turbine set employing the heat exchanger : Isentropic efficiency of compressor = 75%, isentropic efficiency of the turbine = 85%, mechanical transmission effi- ciency = 99%, combustion efficiency = 98%, mass flow = 22.7 kg/s, pressure ratio = 6 : 1, heat exchanger effectiveness = 75%, maximum cycle temperature = 1000 K. The ambient air temperature and pressure are 15°C and 1.013 bar respectively. Caleulate : (i) The net power output (iii) Thermal efficiency of the cycle. Take the lower calorific value of fuel as 43125 kJ/kg and assume no pressure-loss in heat exchanger and combustion chamber. (ii) Specific fuel consumption (Ans. (i) 2019 kW (iü) 0.4799 kg/kWh (iii) 16.7%)
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