Air flows into a heat engine at ambient conditions of 14.7 lbf/in.2, 540 R, as shown in Fi...

Air flows into a heat engine at ambient conditions of 14.7 lbf/in.2, 540 R, as shown in Fig. P8.111. Energy is supplied as 540 Btu per lbm air from a 2700-R source, and in some part of the process a heat transfer loss of 135 Btu per lbm air occurs at 1350 R. The air leaves the engine at 14.7 lbf/in.2, 1440 R. Find the first- and secondlaw efficiencies.

FIGURE P8.111