Unformatted text preview: eﬃciency as pressure ratio → 1. Remember: q H is ﬁxed 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 eﬃciencies of η C = η T = 0 . 85, and the regenerator has an eﬀectiveness of ± = 0 . 9. The maximum temperature in the cycle is 1800 K, and the pressure ratio is 8. Calculate: (a) The thermal eﬃciency of the cycle. (b) The cycle exit temperature (the temperature of the gases exhausted to the atmosphere), and (c) The volumetric ﬂow rate of the air entering the compressor. Solve the problem two ways, using 1) the air tables, and 2) constant speciﬁc heat. Note that when using the air tables, the deﬁnition of the regenerator eﬀectiveness is given by Eq. (9-23) in the text. 1...
View Full Document
This note was uploaded on 09/24/2011 for the course MECH 3020 taught by Professor Mackowski during the Spring '11 term at Auburn University.
- Spring '11