ISSN Online: 2379-1748
7th Thermal and Fluids Engineering Conference (TFEC)
SJR: 0.152 SNIP: 0.14 CiteScore™:: 0.5
Numerical Investigation of Photothermal Membrane Distillation
Water is among the most fundamental needs of any society. Studies forecast that by 2030 half of the world's population will be living in areas of high-water stress due to increasing population and water footprint. Desalination can be an alternative to increase the influx of water, and many countries in the Middle East are currently relying on it for their water requirement. The primary desalination techniques are based on phase change of water, due to which they are energy-intensive, which leads to an imbalance of water-energy nexus. Therefore, we need a desalination technique that can run on renewable energy to mitigate the energy footprint. Membrane distillation (MD) is a thermally-driven separation process. It has lots of potentials as it works on lower temperature and pressure range that alternate energy sources can provide. However, the conduction heat loss and temperature polarization in MD make the process less energy efficient. Photothermal membrane distillation (PMD), a process in which the localized heating at the surface of the feed side of the membrane by solar irradiation alone drives the distillation process, can be an effective solution as it eliminates the requirement of input feed heating and lower operating velocity to overcome the problem faced in conventional MD. In this study, the PMD system is modelled mathematical and numerical analysis of the same is carried out for the optimum working performance of the system. Preliminary results indicate that with optimized heat recovery, the performance of the system can be further improved (10%-20%).