Efficient atmospheric water generation using mechanical vapor compression: An improved system for sustainable freshwater production

This study addresses the global freshwater scarcity challenge by introducing an energy-efficient atmospheric water generation system that employs a desiccant-based moisture extraction process coupled with a mechanical vapor compression cycle. A thermodynamic model is developed and evaluated across a range of operating conditions, accounting for key parameters such as desiccant and air mass flow rates, ambient environmental factors, and the thermophysical properties of the desiccant. The proposed approach offers a scalable and environmentally sustainable solution, contributing to the advancement of modern water resource management technologies. The proposed system achieves up to 60 % lower specific energy consumption than conventional humidification dehumidification-based atmospheric water generator systems. Optimal performance occurs at a desiccant-to-air mass flow ratio of 4, with diminishing returns beyond this point. The proposed system operates at 8.78 kWh/m³ with compact heat transfer areas: 2.73 m² (evaporator), 0.63 m² (brine preheater), and 0.14 m² (distillate preheater).