dBubbleDensity_dPressure

Derivative of liquid 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 liquid density of R134a in the two-phase region with regard to the state variable p (absolute pressure). The non-derivative function is bubbleDensity.

Restrictions

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

Syntax

ddldp = dBubbleDensity_dPressure(sat)

Inputs (1)

sat

Type: SaturationProperties

Description: Saturation property record

Outputs (1)

ddldp

Type: DerDensityByPressure (s²/m²)

Description: Boiling curve density derivative