Design and analysis of reverse osmosis systems using three parameter models for transport across the membrane
✍ Scribed by S.K. Gupta
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 738 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0011-9164
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✦ Synopsis
The three parameter model of Kedem and Katchalsky [l] for describing the mass transport across a membrane is used for developing the design equations for reverse osmosis (RO) systems. It is shown that by using a simplifying assumption of replacing the local solute permeate concentrations by the average solute permeate concentration over the module, the coupled set of nonlinear algebraic and ordinary differential equations can be solved analytically. The design equations predict the dimensionless length of the module and the solute permeate concentration for a given solvent recovery. Using these design equations the significance of the reflection coefficient in the three parameter model of Kedem and Katchalsky is brought out. For the cases where the solute permeate concentrations are small, and where the solute permeate concentrations are small and the mass transfer coefficient in the module is large, some simplified design equations are also derived. The simplified design equations are easy to handle and can be used for preliminary design and analysis of the RO systems.