An ideal dual cycle has a compression ratio of 14 and uses air as working fluid. The

Question:

An ideal dual cycle has a compression ratio of 14 and uses air as working fluid. The state of air at the beginning of the compression process is 100 kPa and 300 K. The pressure ratio is 1.5 during the constant-volume heat addition process. If the maximum temperature in the cycle is 2200 K, determine
(a) The thermal efficiency and
(b) The mean effective pressure. Use the PG model.