9-100 A gas turbine power plant operates on the simple brayton cycle between the

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9-100 A gas turbine power plant operates on the simple brayton cycle between the pressure limits of 100 and 2000 kPa. The working fluid is air, which enters the compressor at 40 Celsius degrees at a rate of 700 m3/min and leaves the turbine at 650 Celsius degrees. Using variable specific heats for air and assuming a compressor isentropic efficiency of 85 percent and a turbine isentropic efficiency of 88 percent, determine (a) the net power output (b) the back work ratio and (c) the thermal efficiency. Answers (a) 5404 KW (b) 0.545 (c) 39.2 percent

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