You are designing a freezer that requires the production R-134a with T=30 degrees C and a quality of 40%. The feed tmperature, to the throttle, is 30 degrees C. If the diameter of the tube existing the throttle is 1 cm, calculate the following:
a. Upstream diameter [for delta(v^2)=0].
b. Required upstream condition of the R-134a (pressure and state).
c. Pressure drop, delta(P), across the throttle.