dDewDensity_dPressure

Derivative of vapor density in two-phase region w.r.t pressure

Information

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

This function calculates the derivative of vapor density of R134a in two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is dewDensity.

Restrictions

It is only valid in the two-phase region (i.e., ptriple ≤ p ≤ pcrit ).

Syntax

ddvdp = dDewDensity_dPressure(sat)

Inputs (1)

sat

Type: SaturationProperties

Description: Saturation property record

Outputs (1)

ddvdp

Type: DerDensityByPressure (s²/m²)

Description: Saturated steam density derivative