functiondDewEntropy_dPressure_der_sat
Time 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 time derivative of vapor specific entropy of R134a with regard to the time derivative of p. 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 | |
| SaturationProperties | der_sat | Derivative of saturation properties |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | der_dsvdp | Derivative of vapor specific entropy in two-phase region w.r.t. pressure |