Integrated design using dynamic simulation of reverse osmosis plants

This paper presents a proposal for optimal design of desalination plants using dynamic simulation. In particular it is shown how using integrated design based on simulation, the plant structure can be improved and a better operation point can be achieved, with significant cost reductions. This integrated design takes into account the control structure for the final plant (predictive control) and the plant objectives: fulfil the changing water demand, minimizing the energy consumption and avoiding underflows or overflows of the storage tanks, taking into account several restrictions: operation limits, physical restrictions of the pumps and the necessity of periodic cleanings.