Psychrometric charts for hydrocarbon vapours in nitrogen

Psychrometric charts for six different systems involving condensing hydrocarbon vapour in nitrogen are presented. The hydrocarbons considered are benzene, toluene, acetone, n-pentane, n-hexane and cyclohexane. The charts are based upon semi-theoretical equations and make use of published physical property data and correlations. The behaviour of the vapour phase is characterised by the Virial Equation of State truncated at the third term. The solubility of nitrogen in the liquid hydrocarbons is also considered. The charts are constructed with the dry bulb temperature and absolute humidity scales as the orthogonal axes. Curves of constant adiabatic saturation temperature, constant relative humidity, constant gas specific volume and constant enthalpy deviation are plotted on the charts.