Question

Consider a modification of the air-standard Otto cycle in which the isentropic compression and expansion processes are each replaced with polytropic processes having n = 1.25. The compression ratio is 8 for the modified cycle. At the beginning of compression, p1 = 1 bar and T1 = 310 K. The maximum temperature during the cycle is 2200 K.

Determine:

(a) the heat transfer and work in kJ per kg of air for each process in the modified cycle.

(b) the percent thermal efficiency.

c) the mean effective pressure, in bar.

please be precise with rounding because the tolerace is small and use the appropriate table as if needed

Answer 1