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Growing fresh water needs have led to an interest in water desalination using reverse osmosis (RO) membranes. Energy consumption has a large share in the expenses incurred to drive a reverse osmosis desalination system. With depleting fossil fuel reserves, tapping renewable sources of energy is a promising alternative to meet the energy requirements. Wind power coupled to an RO desalination system is a potential means of delivering clean water using sustainable energy. This work investigates modeling of a conceptual wind-energy-driven RO desalination system that is made possible because of an air-pressure energy storage mechanism. Bench-scale experiments were performed on an RO membrane connected to a pressure vessel to validate the models, which were developed based on film theory and solution-diffusion concepts. The models predict water flux and salt concentration through an RO membrane, and were further expanded to predict the performance of a few conceptual full-scale system designs consisting of conventional and air-pressure energy storage wind-RO systems. In the latter design, the energy storage tank serves as a buffer to dampen the variability caused in th