Derivative of the vapour pressue of saturated sodium w.r.t. time
function p_v_T_der import SolarTherm.Media.Sodium.Sodium_utilities.*; extends Modelica.Icons.Function; input Modelica.SIunits.Temperature T "Temperature"; input Real der_T "Derivative of T w.r.t. time"; output Real der_p_v "Derivative of vapour pressure w.r.t time"; end p_v_T_der;