.Modelica.Media.R134a.R134a_ph.dDewEntropy_dPressure_der_sat

Information

This function calculates the time derivative of vapor specific entropy of R134a with regard to the time derivative of p. The non-derivative function is dewEntropy.

Restrictions

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

Interface

function dDewEntropy_dPressure_der_sat
  extends Modelica.Icons.Function;
  input SaturationProperties sat "Saturation properties | pressure is used for interpolation";
  input SaturationProperties der_sat "Derivative of saturation properties";
  output Real der_dsvdp "Derivative of vapor specific entropy in two-phase region w.r.t. pressure";
end dDewEntropy_dPressure_der_sat;