A comprehensive first-principles based mathematical model, which explicitly accounts for membrane hydraulic permeability, pump characteristic curves and retentate pressure drop, is developed to describe the reverse osmosis desalination process. Parameters used in the model are derived from data collected in an industrial desalination plant. A model-based optimization framework is then developed to reduce pump energy consumption while maintaining the same permeate rate. The model predicted results match well with plant trials, and a 10% reduction in energy consumption is demonstrated.
References
[1] Li, M. 'Optimization of Multitrain Brackish Water Reverse Osmosis (BWRO) Desalination,' Industrial Engineering Chemistry Research, 51, 3732-3739, 2012.
[2] Li, M. 'Optimal Plant Operation of Brackish Water Reverse Osmosis (BWRO) Desalination,' Desalination, 293, 61-68, 2012.
[3] Li, M. 'Reducing Specific Energy Consumption in Reverse Osmosis (RO) Water Desalination: An Analysis from First Principles,' Desalination, 276, 128-135, 2011.
[4] Li, M. 'Minimization of Energy in Reverse Osmosis Water Desalination using Constrained Nonlinear Optimization,' Industrial and Engineering Chemistry Research, 49, 1822-1831, 2010.
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