Repeat Problem, but treat the air as an ideal gas with constant specific heats evaluated at (a) 300 K, and (b) 1000 K.
Problem
A dual cycle has air operating as the working fluid. The air begins the compression process at 100 kPa and 40°C. During the heat addition process, 1200 kJ/kg of heat is added to the air. The pressure ratio in the cycle is 2, and the compression ratio of the cycle is 18. Treating the air as an ideal gas with variable specific heats, determine (a) the temperature and pressure at the end of each process, (b) the net work per kg of air produced in the cycle, (c) the thermal efficiency of the cycle, and (d) the mean effective pressure.
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