• Uday Prajapati
• Bhupendra Gupta
• Jyoti Bhalavi

Double slope single basin passive solar still is the best choice for drinking water prone remote areas Investigations show its limitation because of its lower performance in terms of distillate output. The purpose of this study is to evaluate experimental results of double slope solar still using phase change material and circular fins. This work presents the characteristics and working principles of the double slope solar still by using phase change materials and circular fins and the researchers in this field are described from the viewpoint of experimental tests, theoretical analyses as well as practical applications. The objective of this present work is to improve the performance of a solar still through increasing the productivity of fresh water. In modified solar still Mg2SO4.7H2O is as phase change material and aluminum circular fins are used. The materials are added to the basin of the solar still to enhance the performance of solar still. For experimentation two identical solar stills of double slope having basin area of 0.5×0.5 m2 were designed, fabricated and tested to compare the productivity of the solar desalination system. One of them is conventional solar still (without fins and PCM) and other one is of contains aluminum fins and for another day one modified solar still contains aluminum fins and second one contains 1 Kg of PCM. Experiments were conducted at water depth of 5 cm in climate conditions of Jabalpur (23° 10' N, 79° 59'E), Madhya Pradesh India. The experimental results show that, the daily freshwater yield for solar still with phase change material and aluminum fins has higher than that of conventional solar still. For the first day daily freshwater productivity approximately reached 1400 & 1700 ml/m2 day for conventional solar still and modified solar still(with fins) and for second day daily freshwater productivity approximately reached 1560 & 1940 ml/m2 day for modified solar still(with fins) and modified solar still(with 1Kg PCM) at 5 cm water depth respectively.

Solar still, Desalination, Double slope solar still, Aluminium circular fins, Phase change materials, Performance, Productivity. _______________________

"Performance improvement of double slope solar still using aluminium fins and phase change material", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.295-302, June-2019, Available :http://www.jetir.org/papers/JETIR1906A49.pdf

"Performance improvement of double slope solar still using aluminium fins and phase change material", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp295-302, June-2019, Available at : http://www.jetir.org/papers/JETIR1906A49.pdf