Modeling heat and mass transfer in osmotic evaporation process

Abstract

A model for the mass-and heat-transfer phenomena in an osmotic

Study of a new membrane evaporator with a hydrophobic metallic membrane

“…In order to improve the explanations given above for the experiments without the lamp and to describe the mass transfer in our system, we used a theoretical model developed in our group and based on resistances in series [9,10]. It has been presented previously in Section 2.3.…”

“…These models of gas transport in the porous media have been coupled to classical in series-resistances models in order to characterize globally the system and then calculate the water fluxes in function of the operating and membrane structural parameters [9,10]. The model used in this study is in keeping with previously mentioned models but on the contrary of previous works, here we also considered the concentration profiles in the axial direction (z).…”

Experimental and theoretical study of LDPE versus different concentrations of Irganox 1076 and different thickness

“…This approach based on a resistances-in-series model has been originally applied to describe the mass transfer in several separation processes (Bocquet, Torres, Romero, Sanchez, & Rios, 2005;Estay et al, 2007;Romero, Rios, Sanchez, Bocquet, & Saavedra, 2003;Valdés et al, 2009), which respond to a local transfer process very similar to this case, combining transfer and phase equilibrium steps. The diffusion coefficient value in the polymer phase shows that the main mass transfer resistance that controls the migration process is the diffusion step in the polymer.…”

Sweep gas membrane distillation in a membrane contactor with metallic hollow-fibers

“…For this purpose we calculated the logarithmic average of the transmembrane water vapour pressure gradient (ΔP) between the input and output of the fibers with the corresponding measured relative humidity and water vapour saturation pressure [33]. The experimental membrane permeance value was obtained by dividing the experimental water evaporation flux (J w ) by the logarithmic average of transmembrane water vapour pressure gradient (ΔP) across the membrane for all the experiments using the following equation:…”