Figure 6 compares both the ideal and non-ideal non- dimensional net work output with 90% losses during compression and expansion processes. The realistic net work output behaves similar to that of the ideal cycle. However, the net work output decreases significantly when losses are included. The curves with losses also have a steeper slope than the net work output is maximized, , will be lower when
losses are included. To find this pressure ratio, the derivative of Eq. (16) is taken, and set equal to zero. This yields: