A Performance Analysis and Comparative Study of Single Basin Double Slope Passive Solar Still using Different Materials as Storage Medium

Most of the desalination system works on the electricity, which indirectly consumes high grade or non-conventional energies like coal, gases, fossil fuel and oil. On the extraction of heat energy from these fuels, carbon footprint occurs, which causes induction of greenhouse gases in the atmosphere, ozone layer depletion as well as hazards of health on mankind. It is also responsible to enhance the global warming which is burning topic and major threat to the sustainability of life. The opportunity of harnessing solar energy is most efficient and ecofriendly technique towards the green technology. The solar desalination is one time investment and low temperature process for lifetime pure water production up to 15 to 20 years. In this thesis, various methods of desalination such as direct and indirect have been discussed. On large scale desalination system for production of pure water, indirect methods are adopted. Whereas for small scale and medium scale desalination systems, direct methods are more suitable. The performance and productivity of solar still can be improved by using various locally available materials and by the simple modifications in the design of still. These low cost double slope single basin solar stills can be economically and easily fabricated for meeting daily needs of fresh water. These solar stills are sufficient for the communities live on the island and small households. It can also be used to convert brackish water into pure water for the population residing near river banks. In this project performance analysis of solar still with different storage substances were carried out at different depth of water. The comparison of productivity and thermal efficiency for still having water with jute, aluminum chips, granite, a conventional still and a non-conventional still have done and different graphs were plotted. The analysis and compilation of results have done and concluded that the maximum efficiency and productivity is obtained from jute in comparison to aluminum pieces, granite, saline water in conventional still and saline water in non-conventional still, i.e. 15.69% and 880 respectively. It can be said that "the jute is best storage material among all of them in turn to get maximum efficiency and productivity of single basin double slope passive solar still".