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., p_triple ≤ p ≤ p_crit ).

dsvdp = dDewEntropy_dPressure(sat)

sat	Type: SaturationProperties Description: Saturation properties | pressure is used for interpolation

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