functiondDewEnthalpy_dPressure_der_sat
Time derivative of vapor specific enthalpy in two-phase region w.r.t pressure
Extends from Modelica.Icons.Function.
Information
This function calculates the time derivative of vapor enthalpy of R134a with regard to the time derivative of p. The non-derivative function is dewEnthalpy.
Restrictions
It is only valid in the two-phase region (i.e., ptriple ≤ p ≤ pcrit ).
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| SaturationProperties | sat | saturation properties | pressure is used for interpolation | |
| SaturationProperties | der_sat | derivative of saturation properties |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | der_dhvdp | derivative of vapor specific enthalpy in two-phase region w.r.t pressure |