Refrigerant 134a Entersanozzleat200lbf/in,220F, withavelocityof120ft/sandexitsat20l bf/in with 2 velocity of 1500 ft/s. The inlet area of the nozzle is 10 in , and heat is being lost at 15 Btu/lbm. For steady-state operation, determine (a) the exit temperature (in oF) (b) the quality of R-134a at the exit. (c) the mass flow rate of the R-134a (in lbm/s) (d) the exit area of the nozzle (in in2).

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor