Feasibility analysis of a thermo-hydraulic process for reverse osmosis desalination: Experimental approach

Reverse osmosis is a widely used desalination technique, mainly because of its low specific energy consumption. Autonomous reverse processes are increasingly developed their efficiency and the decentralization numerous water stress areas. In this context, process powered by an innovative thermo-hydraulic system using heat has been developed. This new aims to autonomously produce fresh from brackish source, compatible with needs small remote village. exploits temperature source (60–80 °C) such as one delivered solar flat-plate collectors. The then converted into hydraulic thermodynamic engine cycle in which expansion working fluid directly pressurizes means hydro-pneumatic tanks, while high pressure brine recovered cylinder. Since previous numerical work on shown consumption about 12 kWh m?3 for 4 g L?1 water, close performances relatable processes, experimental full scale prototype built. presented here shows results experiments conducted prototype, behavior performances. Numerical compared discussed, confirm feasibility process. These tests show promising cyclic functioning suggested. freshwater production salinity remaining under drinkability limit calculated 25 m?3. order reach better performances, transfer tanks be improved avoid between saltwater leads condensation issues, another cylinder design consider gasket abrasion.