This function returns the partial derivative of dew density wrt p according to TTSE.
| Author: | Julien Bonifay | SCD | 
| Checked by: | ||
| Protection class: | internal | 
function rho2s_p_dp import SI = Modelica.SIunits; input SI.Pressure p "Pressure"; output Real drho2s_dp "Pressure Derivative of dew density"; end rho2s_p_dp;