WOLFRAM SYSTEM MODELER

dDewEnthalpy_dPressure

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

Wolfram Language

In[1]:=
SystemModel["Modelica.Media.R134a.R134a_ph.dDewEnthalpy_dPressure"]
Out[1]:=

Information

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

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

Restrictions

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

Syntax

dhvdp = dDewEnthalpy_dPressure(sat)

Inputs (1)

sat

Type: SaturationProperties

Description: Saturation property record

Outputs (1)

dhvdp

Type: DerEnthalpyByPressure (J⋅m⋅s²/kg²)

Description: Saturated steam specific enthalpy derivative