A nozzle is required to produce a steady stream of R134a at 240 m/s at ambient conditions,

Question:

A nozzle is required to produce a steady stream of R–134a at 240 m/s at ambient conditions, 100 kPa 20C. The isentropic efficiency may be assumed to be 90%. Find by trial and error or verify that the inlet pressure is 375 kPa. What is the required inlet temperature in the line upstream of the nozzle?