This information is part of the Modelica Standard Library maintained by the Modelica Association.

This function calculates the specific internal energy of R134a from the state record (e.g., use setState_phX function for input). The specific internal energy is modelled by the fundamental equation of state of Tillner-Roth and Baehr (1994).

u = specificInternalEnergy(state)

state	Type: ThermodynamicState Description: Thermodynamic state record

u	Type: SpecificEnergy (J/kg) Description: Specific internal energy