The location of the point where gas and liquid phases can be split for better recuperation of heat energy within heat exchangers is estimated using the developed methodology. According to the pinch analysis methodology, the pinch point was specified and optimal minimal temperature difference was determined. A hot composite curve that represents the gas mixture cooling according to equation of state for real gases was drawn to account the gas-liquid equilibrium. In this paper, process integration methodology has been applied to the partly condensed streams. These gases provide the sensitive heat with utilisation potential and latent heat with the components for condensation. Nowadays a lot of low-grade heat is wasted from the industry through the off- and flue-gasses with different compositions.
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