dDewEntropy_dPressure

Derivative of vapor specific entropy in two-phase region w.r.t. pressure | use setState_phX function for input

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

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 ).

Syntax

dsvdp = dDewEntropy_dPressure(sat)

Inputs (1)

sat

Type: SaturationProperties

Description: Saturation properties | pressure is used for interpolation

Outputs (1)

dsvdp

Type: Real

Description: Derivative of vapor specific entropy in two-phase region w.r.t. pressure