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Design and Thermodynamic Evaluation of An Integrated RO-AGMD-Spray Dryer System for Solar-Powered Zero Liquid Discharged Desalination | ||
| Chemical Process Design | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 11 آبان 1405 | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22111/cpd.2026.56159.1098 | ||
| نویسندگان | ||
| Pouria Moradalizadeh1؛ Taleb Zarei* 2؛ Ehsan Abedini1؛ Jamshid Khorshidi1 | ||
| 1University of Hormozgan, Bandar Abbas, Iran | ||
| 2Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas, Iran | ||
| چکیده | ||
| This study presents a thermodynamic model of a solar-driven hybrid desalination system integrating reverse osmosis (RO), air gap membrane distillation (AGMD), and a spray dryer to achieve zero liquid discharge (ZLD) and enhance freshwater recovery. In this configuration, seawater is first treated by RO, producing freshwater and a concentrated brine stream that is further processed by AGMD using thermal energy supplied by a parabolic trough collector (PTC). The remaining brine is converted into solid salt via spray drying, eliminating liquid waste. A combined modeling framework is developed, including an element-wise solution–diffusion model for RO and system-level models for AGMD, PTC, and the spray dryer. The model predicts freshwater production, energy consumption, and salt recovery under varying operating conditions. At a feed flow rate of 16,000 L/h, the hybrid system produces approximately 9,300 L/h of freshwater, compared to 4,800 L/h for a standalone RO system. Although electrical energy consumption increases from 19 to 23.5 kWh/h, solar thermal input improves overall efficiency. The system achieves up to 135 kg/h of solid salt with product water quality below 500 mg/L TDS. The proposed system offers improved water recovery, effective brine management, and a sustainable solution for water-scarce regions. | ||
| کلیدواژه‌ها | ||
| Reverse osmosis (RO)؛ Air gap membrane distillation (AGMD)؛ Spray dryer؛ Zero liquid discharge (ZLD)؛ Solar thermal energy | ||
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