The air enters the compressor of an open cycle gas turbine at 1 bar and 20°C. The overall pressure ratio of the cycle is 4/1. The isentropic efficiencies of the compressor and turbine are 80% and 85% respectively. The air/fuel ratio used is 80/1 with a heating value of 41800 kJ/kg. The pressure drop in the combustion chamber is 0.11 bar and the combustion efficiency is 96%. The air flow rate is estimated to be 5 kg/s. Determine: • Power output in kW. • Cycle thermal efficiency. Assume that the working fluid around the cycle has the properties C, 1.10 kJ/kg K and y= 1.4
The air enters the compressor of an open cycle gas turbine at 1 bar and 20°C. The overall pressure ratio of the cycle is 4/1. The isentropic efficiencies of the compressor and turbine are 80% and 85% respectively. The air/fuel ratio used is 80/1 with a heating value of 41800 kJ/kg. The pressure drop in the combustion chamber is 0.11 bar and the combustion efficiency is 96%. The air flow rate is estimated to be 5 kg/s. Determine: • Power output in kW. • Cycle thermal efficiency. Assume that the working fluid around the cycle has the properties C, 1.10 kJ/kg K and y= 1.4
Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q-3: The air enters the compressor of an open cycle gas turbine at 1 bar and 20°C. The overall pressure ratio of the cycle is 4/1. The isentropic efficiencies of the compressor and turbine are 80% and 85% respectively. The air/fuel ratio used is 80/1 with a heating value of 41800 Ki/kg. The pressure drop in the combustion chamber is 0.11 bar and the combustion efficiency is 96%. The air flow rate is estimated to be 5 kg/s. Determine: Power output in kW. « Cycle thermal efficiency. Assume that the working fluid around the cycle has the properties C, = 1.10 ki/kg K and r=14 Four-stroke, single-cylinder diesel power unit when tested gave the following particulars: Brake power 9kW Rotational speed 250 pm Indicated mean effective pressure 0.46 MN/m? Mechanical efficiency 80% Bore/Stroke ratio 0.66 Calculate: o Engine displacement in cm’. o Cylinder bore in cm.
![Q-3: The air enters the compressor of an open cycle gas turbine at 1 bar and 20°C. The overall
pressure ratio of the cycle is 4/1. The isentropic efficiencies of the compressor and turbine
are 80% and 85% respectively. The air/fuel ratio used is 80/1 with a heating value of
41800 kJ/kg. The pressure drop in the combustion chamber is 0.11 bar and the
combustion efficiency is 96%. The air flow rate is estimated to be 5 kg/s. Determine:
• Power output in kW.
• Cycle thermal efficiency.
Assume that the working fluid around the cycle has the properties C, = 1.10 kJ/kg K and
y= 1.4
Q-4: Four-stroke, single-cylinder diesel power unit when tested gave the following particulars:
Brake power
9 kW
Rotational speed
Indicated mean effective pressure
Mechanical efficiency
250 rpm
0.46 MN/m?
80%
Bore/Stroke ratio
0.66
Calculate:
• Engine displacement in cm'.
• Cylinder bore in cm.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F522df21e-c7c9-4120-bd06-f3dc7b5cf44c%2F33090096-de7d-4af5-8dd3-19b90e0e30b5%2Fxnb2km_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q-3: The air enters the compressor of an open cycle gas turbine at 1 bar and 20°C. The overall
pressure ratio of the cycle is 4/1. The isentropic efficiencies of the compressor and turbine
are 80% and 85% respectively. The air/fuel ratio used is 80/1 with a heating value of
41800 kJ/kg. The pressure drop in the combustion chamber is 0.11 bar and the
combustion efficiency is 96%. The air flow rate is estimated to be 5 kg/s. Determine:
• Power output in kW.
• Cycle thermal efficiency.
Assume that the working fluid around the cycle has the properties C, = 1.10 kJ/kg K and
y= 1.4
Q-4: Four-stroke, single-cylinder diesel power unit when tested gave the following particulars:
Brake power
9 kW
Rotational speed
Indicated mean effective pressure
Mechanical efficiency
250 rpm
0.46 MN/m?
80%
Bore/Stroke ratio
0.66
Calculate:
• Engine displacement in cm'.
• Cylinder bore in cm.
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