Problem
1. Consider an ideal Stirling-cycle engine in which the state at the beginning of the isothermal compression process is 100 kPa, 25oC, the compression ratio is 6, and the maximum temperature in the cycle is 1100oC. Calculate the maximum cycle pressure and the thermal efficiency of the cycle with and without regenerators.
2. An air-standard Stirling cycle uses helium as the working fluid. The isothermal compression brings helium from 100 kPa, 37oC to 600 kPa. The expansion takes place at 1200 K, and there is no regenerator. Find the work and heat transfer in all of the four processes per kilogram of helium and the thermal cycle efficiency.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.