Rework Problem 9.43 except that the pressure ratio and maximum temperature are, respectively,
a) 4 and 1200°C,
b) 5 and 1400°C,
c) 6 and 1600°C.
Air enters the ideal regenerative Brayton cycle of Fig. 9.46 at 25°C and 100 kPa. The compressor raises the pressure to 500 kPa. The products of combustion leave the combustion chamber at 1200°C. Assuming constant specific heats and an air mass flow rate of 6 kg/s and an ideal cycle, calculate:
i) The cycle efficiency
ii) The power produced by the turbine
iii) The power used by the compressor
iv) The back-work ratio
v) The rate of heat exchange in the regenerator
Figure 9.46

Transcribed Image Text:

Regenerator Products of combustion Comperssor Turbine net 100 kPa 25 C