Influence of non condensables on the condensation of vapour mixture forming immiscible liquids

Abstract

This paper considers condensation of mixed vapours of water and hydrocarbons in the presence of a non-condensable gas, a system that exhibits two liquid phases. A model based on the Maxwell-Stefan equations is developed to calculate the interphase mass and heat transfer fluxes and determine the condensation rates along the height of a vertical condenser tube. Simulations show that a simpler mass transfer model, using effective diffusivities, leads to an overestimation of the condenser area required for a specified condensation duty.