functiondDewEnthalpy_dPressure
Derivative of vapor specific enthalpy in two-phase region w.r.t. pressure
Information
This function calculates the derivative of vapor enthalpy of R134a in the two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is dewEnthalpy.
Restrictions
It is only valid in the two-phase region (i.e., ptriple ≤ p ≤ pcrit ).