Energy, Exergy Investigation of Absorber Multilayered Composites Materials of a Solar Still in Algeria

The supply of drinking water has become a major challenge, despite large but relatively polluted quantities of groundwater, especially in southeastern Algeria. The use of solar energy for water desalination has become the subject of many local and global researchers. To solve this problem, we carried out an experimental study on two solar stills with a single slope. One was provided by a new absorber designed with multilayer composite materials and the other still was taken as a reference or control. The dimensions of the solar still was 0.5 x 0.5 m and the thickness of the layer of water used was 0.01 m. The results obtained show that the quantity of fresh water produced from the modified solar still was 4,312 l/m2 per day, while that of the reference solar still was 4,488 l/m2 per day, showing a difference in productivity of 3 %.