A brackish water Reverse Osmosis (BWRO) desalination unit is studied in this paper. This unit is designed to be fed by a renewable energy based on hybrid source (wind and photovoltaic: hybrid system) with/without storage battery. The energy will be directly transmitted to the motos-pump of the BWRO process. An appropriate energy management starts from the understanding of the BWRO desalination process with its energy consumption. To optimize the energy transfer towards the load, it is useful to study the mechanical and the hydraulic system behaviour. Experimental characterizations of the motos-pumps and hydraulic load are elaborated from which significant results are drawn.

In this paper, the authors investigate a systemic modeling of a small-scale Brackish Water Reverse Osmosis (BWRO) desalination unit. This unit is powered by hybrid renewable energy system (photovoltaic-wind) without battery storage. The RO desalination process includes several disciplinary fields such as mechanical, hydraulic, chemical and thermal domains. Therefore, a multidisciplinary approach is proposed in this work. The bond graph is a modeling technique well known for dynamic modeling of such a multi-physical system. An experimental characterization of a BWRO test bench is performed in order to assess the established bond graph model of the studied desalination process. The simulation results drawn from a dedicated software tool reveal significant results when compared to experimental results.

This paper studies a water and energy management strategy dedicated to an autonomous water desalination system fed by a hybrid (Photovoltaic (PV) and Wind) power generator without battery storage. RO technology is one of the most powerful processes used for desalination to provide fresh water. Accordingly, renewable energy can be used especially by means of hybrid (PV-wind) system. Taking into consideration the multidisciplinary and strongly coupled device from a systemic point of view, the system being considered as a whole. Inside this framework, the water/energy management of the global process has to be optimized in order to produce fresh water while considering the different system constraints with the given intermittent power.

This paper presents the experimental results of an original control strategy for motor-pump implemented on a dSPACE controller board. The Power Field Oriented Control strategy developed in this paper is used to drive a motor-pump fed by intermittent renewable sources. This system is dedicated to autonomous applications for pumping or water desalination for remote areas without access to hydraulic and electric networks. This control strategy allows controlling the DC bus voltage without using batteries in the system. The DC voltage control is achieved through the control of the inverter used for the motor-pump. Experimental results for variable power source are presented and confirm the effectiveness of the proposed control strategy.