h_pro cp_pro*(re.T-Tref)+href_pro Enthalpy, propylene oxide h_w cp_w*(re.T-Tref)+href_w Enthalpy, water h_proh cp_proh*(re.T-Tref)+href_proh Enthalpy, propylene glycol h_meoh cp_meoh*(re.T-Tref)+href_meoh Enthalpy, methanol hf_pro cp_pro*(Tfeed-Tref)+href_pro Feed enthalphy, propylene oxide hf_w cp_w*(Tfeed-Tref)+href_w Feed enthalphy, water hf_meoh cp_meoh*(Tfeed-Tref)+href_meoh Feed enthalpy, methanol Q_xch Fexch*cp_exch*(Texch-re.T)*(1-exp(-UA/(Fexch*cp_exch))) Heat exchange