A startup company is selling a new compressor claimed to have an isentropic efficiency of 90% when compressing refrigerant R-134a from saturated vapor at 0.8 MPa to 1.4 MPa. The compressor is said to be adiabatically insulated, requiring a work input of only 9.5 KJ per unit mass of refrigerant flowing. Verify that the specs of the compressor are possible.

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.