Water desalination with solar –multi effect humidification
2018 – 2019
أ.د. كمال عبد العزيز
أ.د. أشرف سعيد
Renewable energy employing desalination is a fast growing field of research. Solar technology employing water desalination is sustainable solution for dry region with scarcity of water. High potential of solar energy is used for purification of saltwater. The project is concerned with an experimental study of parabolic trough solar collector desalination setup with tracking system manufactured to facilitate capturing of sunlight with respective sun position. Desalination assisted by parabolic trough collector with horizontally north-south orientation. Concentrating the solar irradiation to the focal line containing receiver tube of parabolic trough, where working fluid inside receiver tube is heated up and evaporate the water in the greenhouse. In the greenhouse, steam condenses on the transparent glass cover and potable water has been collected.
Egypt possesses a high potential of brackish groundwater available from different aquifers, and seawater from the Mediterranean Sea border its northern coast and the Red Sea border its eastern coast. All Arab countries lie in the best sun-belt region in the world and Egypt has the highest number of sun hours all year round. Solar energy for groundwater and seawater desalination is an independent infinite energy resource; it has low running costs and reduces the contribution of greenhouse gases (GHG) to global warming. Perfect meteorological conditions and land space are available in remote areas, where solar desalination could supply freshwater for drinking, industry, and for greenhouse agriculture.
In this project, a prototype for greenhouse water desalination system assisted with parabolic trough solar collector is executed and the effect of solar radiation, working fluid flow condition, and geometrical parameters on the amount of obtained clean water, are studied.