1. Design And Development of Solar Still Prepared by: Makwana Nimesh B Makwana Mayank M Abstract: - The most important aspect for sustaining life on earth is water. In spite of its abundant availability, a small percentage can be used for drinking purpose. The solar water distillation comes out to be a non toxic and promising device which purifies water that uses a renewable solar energy source, Efficiency of the solar water distillation device can be enchased by increasing evaporation rate that is a combined effect of solar radiation and varying absorbing material. The effect of varying absorbing material, distillation production rate is increases. Distilled water use also influence by wind and solar intensity which decreases the distillation rate. The average distillation rate with black paint absorbing material and with using black gravels. Introduction: - Solar energy is available, free cost and non- extinguishing in nature. In the last few years, many researchers were interested in the sea water and brackish water desalination using solar energy. This thermal process is an efficient solution to pure water scarcity in the world. In fact, there are many types of solar stills, some of them have been developed and commercialized. Many experimental and theoretical studies are undertaken in order to modify the solar still using different configurations and improve its yield. The study of many researchers undertaken in this context, indicate that the yield of the solar still depends on the different external and internal operating parameters and that the produced water quantity varies according to the type of the solar still. Working of solar still: - The operating principle of a solar still used for water desalination involves phase change water –vapor.It permits the separation of the water constituents into salts deposits and distilled water. In fact, the solar flow transmitted through the glass cover achieves the absorber, which in return emits thermal radiations, this fact heats water. Under the influence of heat, the vat’s water evaporates successively leaving only water’s molecules, a dissolved salt deposit and all other residues in water. The obtained vapor condenses and the distilled water streams on the interior face of the inclined slope glass put in drains which drives it into a stocking tank. Single slope Solar still:- It consists of basin liner which is the major part of solar still. It absorbs incident solar radiations that are transmitted through the glass cover. Basin liner is made of Fiber resin of 5mm thickness and it has an area of 1 m × 1 m with lower vertical side height of 0.07m and higher vertical side height of 0.254m. Condensing cover of solar still is made of glass of 5 mm thickness and it is placed on vertical walls of solar still at an inclination of 10°. The condensed water gets collected in a distillate channel. A plastic pipe is connected to distillate channel to drain distillate water to measuring jar and a drainage pipe is connected to remove wastes inside the solar still. Rubber gaskets are provided between glass cover and vertical walls to prevent heat loss. Thermocouples are fixed in to the solar still to measure basin liner, glass and water temperature and these thermocouples are connected to a digital temperature indicator to indicate the reading. Experimental Setup:- Results:- Reference:- Dunkle RV. Solar water distillation: the roof type still and a multiple effect diffusion still. In: International Developments in Heat Transfer, Int. Heat Transfer Conference, University of Colorado Imad A1-Hayek a, Omar O. Badran: The effect of using different designs of solar stills on water distillation. Hikmet S. Aybar.Mathematical modeling of an inclined solar water distillation system. Al-Hinai H., M.S. Al-Nassri, B.A. Jubran. Effect of climatic, design and operational parameters on the yield of a simple solar still. Energy Conversion and Management. Abdul Jabbar N. Khalifa, Hussein A. Ibrahim. Effect of inclination of the external reflector on the performance of a basin type solar still at various seasons. M.K. Phadatare and S.K. Verma, RETRACTED: Development in solar still: A review, Renewable Sustainable Energy Reviews B.A. Akash, M.S. Mohsen and W. Nayfeh, Experimental study of the basin type solar still under local climate conditions, Energy Conv. Manage., O.O. Badran and M.M. Abu-Khader, Evaluating thermal performance of single slope solar stills. J. Heat Mass Transfer Guided By: Prof. R R Shah Prof. Maharshi Thakkar