This function calculates the time derivative of liquid specific enthalpy of R134a with regard to the time derivative of p. The non-derivative function is bubbleEnthalpy.
It is only valid in the two-phase region (i.e., ptriple ≤ p ≤ pcrit ).
function dBubbleEnthalpy_dPressure_der_sat extends Modelica.Icons.Function; input SaturationProperties sat "Saturation properties | pressure is used for interpolation"; input SaturationProperties der_sat "Derivative of saturation properties"; output Real der_dhldp "Time derivative of liquid specific enthalpy in two-phase region w.r.t. pressure"; end dBubbleEnthalpy_dPressure_der_sat;