For a given system, if a mass flow exits, then what is the system ______ A. open system B. closed system C. either open or closed D. none of them

As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb;/in? and is compressed to 160°F, 200 Ib;/in?. The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 Ib:/in?, 90°F. Air enters the condenser at 70°F, 14.7 lb:/in? with a volumetric flow rate of 750 ft/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. Condenser Air at T P4=14.7 1bf'in.? (AV), 5 4 wwww T I; =110°F 3 p2 = p3 = 200 ib/in = 60°F T,= 160°F P2= 200 lbfin. T3- 90'F P=200 Ibf/in2 T3 = 90°F pi = 80 lbrin? T1 Compressor = 40°F 1+ R22 at Iz = 40°F Pi - 80 Ibf/in.? Determine the mass flow rate of refrigerant, in Ib/min, and the compressor power, in horsepower.

Air enters a diffuser operating at steady state at 540°R, 15 Ilbf/in.?, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. The ratio of the exit area to the inlet area is 6. Assuming the ideal gas model for the air and ignoring heat transfer, determine the temperature, in °R, and pressure, in Ibf/in.?, at the exit.

Need Help going through the process on how to solve this problem. May accidentally be asking this a second time, because the first time I asked it, it didn't show as a pending problem. Steam expands adiabatically through a turbine at steady state. The entering stream is at 750 lbf/in^2, 750°F, and the exiting stream is a saturated vapor at 10 lbf/in^2. Kinetic and potential energy effects are negligible. a. How much work per lb of flow does the turbine produce, in Btu/lbm? b. If the turbine produces 3000 kW of output power, determine the mass flow rate of steam in kg/s. c. If this process were isentropic, the existing stream would no longer be a saturated vapor. Determine the final quality of steam in that case. d. Determine the isentropic turbine efficiency.