This paper presents an experimental study using Fresnel lens to increase the overall efficiency of the conventional Single Slope Solar Still (SSSS) with single basin. The work aims to increase the performance of single basin conventional SSSS while maintaining the simplicity and usability of the system. Especially in the rural parts of Oman, the device is very simple to use. For the present unit, the conventional single basin SSSS has been fitted with an adjustable Fresnel lens. The adjustment enables the carrying out the experiments with and without the Fresnel lens at our Institute. The equipment was constructed from simple available materials and was placed north-south during the experimentation. The Fresnel lens fitted frame once adjusted in the morning was kept at same position for the entire day without tracking. The depth of water in the basin was maintained constant at 0.02 m during the study. The distillate yield for single basin SSSS fitted with Fresnel lens is observed 3 to 3.5 times higher than the conventional. The overall efficiency of the system has also increased almost 32.19 percent over the conventional. The quality of the distillate was assessed, which was estimated to be within limits in compliance with international standards. In conclusion, Fresnel lens has significantly improved the distillate production output and overall efficiency of conventional single basin SSSS.

The pipelines that are used for transporting sea water to desalination plants are made of expensive steel alloys. However because of the salt content in water and also other atmospheric factors this pipe undergoes severe corrosion problem. This causes pits and holes in pipe surface making it useless and lead to huge replacement cost of pipes. Hence a way to control corrosion is needed.In this project use of different coatings to overcome corrosion is tested experimentally. Five types of coatings namely epoxy, aluminum, enamel, rubber, and chrome are coated on the samples prepared from actual pipeline used in the plant and the experimental results and analysis are summarized for finding the best coating for reducing corrosion of pipes. Among the five different coatings tested the rubber and epoxy coatings resulted with minimum corrosion rate and weight loss.

The objective of the work is to apply solar power for charging electronic appliances namely iPhones. The circuit is designed for low ampere and high ampere charging by using PROTEUSsoftware and fabricated and tested for its performance.The time required for full charging of iphone5 with 1A charging is 90 minutes whereas it is only 50 minutes with 2A charging port. Solar power operated table can be developed by the companies for charging electronic gadgets such as mobile phones that can be employed in public places such as parks, bus stations, and airports. Another feature of this product is that three consumers can charge at a time.Charging of electronic gadgets can be done by the common public by drawing power from the battery charged by solar power thereby reducing consumption of electricity from the main grid. The system with 1A and 2A charging of i-phones using solar power operated battery is unique and new to the locality of Caledonian college of engineering and the work can be extended to other parts of Sultanate of Oman.

E waste production in great amounts and its problems, which challenge the field of waste and environment management stem from the increase in the production of electronic appliances, diversity seeking consumers and perishable products. The disposal of e waste into the environment is hazardous as they contain chemicals. The conventional methods of disposing these e wastes are irrelevant and have an adverse effect on the environmental conditions which is threat to life. Gold is one of the precious metals that can be extracted from the e waste. The present work aim to extract gold from e waste by aqua regia solution based hydro metallurgy method which includes a sequence of process that starts from the treatment of the e waste in HCL solution and ends up with the use of fire assaying technology to get the piece of gold. The outcome of the project successful with 0.05395gm of 23.76 karat and 99.01 % purity of gold extracted. X ray method is used to check the purity and karat of the gold.

Purpose:The supply of pure fresh water is becoming a rising issue is many areas of the world. Clean water being a basic requirement is still unavailable to a large number of people. The fast development and growth in population and agriculture has helped to increase the need of clean water. The solar distillation is one of the most cost efficient ways to accomplish this. Methodology:When water evaporates from the basin of the still, it leaves the various impurities behind resulting in clean palatable water. Solar stills have a comparatively low yield but can be used to provide safe water options to rural areas of the world. To increase the yield of the solar still nano Al2O3 fluid is used,which is prepared using a dispersant of Sodium Dodecyl Benzene Sulphonate (SDBS). The still is a double slope basin type solar still with black paint coating on the inside and external reflecting mirrors, to enhance the yield. Main Findings:This project compares the efficiency and output of double slope solar still with and without the nanofluid. The single basin double slope solar still was fabricated using low cost durable materials and the 0.01 vol. % Al2O3 water based nanofluid was prepared. The results showed a positive outcome of a 15% increase in the rate of distillate collected with the use of nanofluids. The payback period was calculated to be less than 2 weeks without nanofluid and one week with the use of nanofluid. Implications:The present study is useful for obtaining pure drinking water at remote locations in Sultanate of Oman where solar energy is abundance. Novelty of Study: Nanofluids are used to enhance the distillation rate when compared to the conventional solar stills.