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Brayton

The air enters the compressor at 300 K and 100 kPa and is compressed to 700 kPa and 580 K. It gains 950 kJ/kg of heat before entering the turbine, which has an efficiency of 86%. Given these conditions, determine (a) the fraction of turbine work used to drive the compressor and (b) the thermal efficiency. The 7FA gas turbine from GE has a simple-cycle efficiency of 35.9% and produces 159 MW of power at a pressure ratio of 14.7 and turbine inlet temperature of 1288°C using 1,536,000 kg/h of air. Given these conditions and ambient of 20°C and 100 kPa, determine the isentropic

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Erick Ivan Barcenas Martinez
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373 views2 pages

Brayton

The air enters the compressor at 300 K and 100 kPa and is compressed to 700 kPa and 580 K. It gains 950 kJ/kg of heat before entering the turbine, which has an efficiency of 86%. Given these conditions, determine (a) the fraction of turbine work used to drive the compressor and (b) the thermal efficiency. The 7FA gas turbine from GE has a simple-cycle efficiency of 35.9% and produces 159 MW of power at a pressure ratio of 14.7 and turbine inlet temperature of 1288°C using 1,536,000 kg/h of air. Given these conditions and ambient of 20°C and 100 kPa, determine the isentropic

Uploaded by

Erick Ivan Barcenas Martinez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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9-79 Air enters the compressor of a gas-turbine engine at 300 K and 100 kPa, where it is compressed to

700 kPa and 580 K. Heat is transferred to air in the amount of 950 kJ/kg before it enters the turbine. For a
turbine efficiency of 86 percent, determine (a) the fraction of the turbine work output used to drive the
compressor and (b) the thermal efficiency. Assume specific heats for air are constant at room temperature.
9-91 The 7FA gas turbine manufactured by General Electric is reported to have an efficiency of 35.9
percent in the simple-cycle mode and to produce 159 MW of net power. The pressure ratio is 14.7 and the
turbine inlet temperature is 1288°C. The mass flow rate through the turbine is 1,536,000 kg/h. Taking the
ambient conditions to be 20°C and 100 kPa, determine the isentropic efficiency of the turbine and the
compressor. Also, determine the thermal efficiency of this gas turbine if a regenerator with an
effectiveness of 80 percent is added.

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