Improved graphical-analytical method for the design of reverse-osmosis plants

Global sensitivity analysis for identifying critical process design decisions

“…For designing mineral concentration plants, there are the procedures of Hu et al (2013) based on genetic algorithms, Cisternas et al (2014) based on mathematical programing, and Sepúlveda et al (2014b) based on group contribution, among several others. For the design of reverse-osmosis desalination plants, there exist graphical procedures (Evangelista, 1986) and those based on mathematical programing (Sassi and Mujtaba, 2012). The review of these methods is beyond the scope of this paper; readers interested in design mineral flotation plants can see the review of Mendez et al (2009), and those interested in reverse osmosis desalination plant design can see the introduction given by Sassi and Mujtaba (2012).…”

Multi-objective optimization of RO desalination plants

“…There was furthermore no optimization procedure proposed. A first step toward process optimization was the sensitivity analysis is performed by Evangelista and Al-Bastaki [11,12] on a detailed model of a multi-staged hollow fiber membrane configuration. Similarly, McCutchan and Goel [13] modeled two-stages and three-stages configurations of tubular membranes, in order to minimize the operating pressure and the total membrane area [13].…”

“…The membrane water permeability A is approximated as a function of feedwater temperature T, transmembrane osmotic pressure Δp and fouling factor FF by the following relation: (11) with A the membrane pure water permeability…”

“…(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). This corresponds to an equations system with 6.n e degrees of freedom.…”

Optimal Design and Performance of Spiral Wound Modules I: Numerical Method

“…Most of known models (Ohya and Taniguchi, 1975;Taniguchi, 1978;Sirkar et al, 1982;Evangelista, 1985;Evangelista, 1986) disregard the twodimensional nature of velocity, pressure and concentration distributions. While these models are adequate for the design of reverse osmosis plants, they are not useful for the fine assessment of geometrical characteristics of modules.…”