dewEntropy

Specific entropy of vapor phase w.r.t. saturation pressure | use setSat_p function for input

Information

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

This function calculates the vapor phase entropy of R134a from the state variable p (absolute pressure). It is modelled by cubic splines which are fitted with non-equidistant grid points derived from the fundamental equation of state of Tillner-Roth and Baehr (1994) and the Maxwell criteria.

Restrictions

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

Syntax

sv = dewEntropy(sat)

Inputs (1)

sat

Type: SaturationProperties

Description: Saturation property record

Outputs (1)

sv

Type: SpecificEntropy (J/(kg·K))

Description: Dew curve specific entropy