functiondDewEntropy_dPressure
Derivative of vapor specific entropy in two-phase region w.r.t. pressure | use setState_phX function for input
Extends from Modelica.Icons.Function (Icon for functions).
Information
This function calculates the derivative of vapor entropy of R134a with regard to the state variable p (absolute pressure). The non-derivative function is dewEntropy.
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 |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | dsvdp | Derivative of vapor specific entropy in two-phase region w.r.t. pressure |