A refrigeration:
- enters an expansion valve (of cross-sectional area 0.011 m2) at 11 bar, 330 K and 25 m s-1,
- and leaves at 2 bar.
This application calculates the temperature and velocity of the refrigerant as it exits the valve.
The kinetic energy term in the First Law of Thermodynamics is generally small and is normally be ignored; this makes the combined system of equations explicit, and simple to solve. For this analysis, however, the kinetic energy term will remain. The equations are then implicit, and hence require a numerical solution