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Unformatted text preview: eciency as pressure ratio 1. Remember: q H is xed at 900 kJ/kg. 3. A gas turbine cycle is required to produce a power of W = 5 MW. The turbine and compressor have isentropic eciencies of C = T = 0 . 85, and the regenerator has an eectiveness of = 0 . 9. The maximum temperature in the cycle is 1800 K, and the pressure ratio is 8. Calculate: (a) The thermal eciency of the cycle. (b) The cycle exit temperature (the temperature of the gases exhausted to the atmosphere), and (c) The volumetric ow rate of the air entering the compressor. Solve the problem two ways, using 1) the air tables, and 2) constant specic heat. Note that when using the air tables, the denition of the regenerator eectiveness is given by Eq. (9-23) in the text. 1...
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- Spring '11