Air enters the compressor of an air-standard Brayton cycle with a volumetric flow rate of 60 m3/s at 100 bar, 320 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 2200 K. For the compressor, the isentropic efficiency is 92% and for the turbine, the isentropic efficiency is 95%. Determine (a). the net power developed, in MW, (b). the back work ratio, and (c). the thermal efficiency of the cycle.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.