In: Mechanical Engineering
A regenerative gas-turbine power plant with two stages of
compression and two stages of expansion operates on a Brayton cycle
with a pressure ratio across the two-stage compressor of 12. Air
enters the first stage of the compressor at 100 kPa and 300 K. At
the intercooler exit, the temperature is 300 K. In both turbine
stages, air enters at 1400 K. The total heat transfer rate to the
air in both combustors is 5,000 kW. The regenerator has an
efficiency of 70%, both compressor stages have an isentropic
efficiency of 75%, and both turbine stages have an isentropic
efficiency of 80%. The pressure in the intercooler and reheater is
600 kPa. Using an Air Standard Analysis, find the following
(a) Thermal Efficiency in Percentage
(b) net work output
(c) mass flow rate
(d) Intercooler/Reheater pressure that maximizes the cycle's
thermal efficiency
(e) Max Work output