Browsing by Author "El-Maghlany, Wael M"

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    Comparative study of hemispherical solar distillers iron-fins
    (Elsevier, 2021-04-10) Attia, Mohammed El Hadi; Kabeel, AE; Abdelgaied, Mohamed; El-Maghlany, Wael M; Bellila, Abdelkader
    The ratio between surface area to volume is higher in spherical distillers than traditional single slope distillers. To utilize this advantage, the study measures hemispherical distillers performance. Iron fins have been employed at different lengths and spacing in absorber plate to increase absorption area and transmit heat from hot basin plate to saline water. Three configurations have been tested under same operating conditions. First, the conventional hemispherical distiller without fins representing the reference case (CHSS). Second, the modified hemispherical distiller with fins set at 5 cm spacing (MHSS-IF5). Third, the modified hemispherical distiller with fins set at 7 cm (MHSS-IF7). Fins diameter is constant at 1.2 cm with tested length of 3, 2 and 1 cm starting from the basin absorber plate. Basin salt water is fixed at 3 cm (maximum fin length) during experiments. Results prove that fin utilization is important in performance enhancement. However, fin length effect on performance depends on spacing due to shading effect in distillers. Consequently, the fins utilization improves distiller productivity up to 56.73% with best configuration of MHSS-IF7 with 2 cm fin length and 7 cm spacing. The fins utilization is not costly in the hemispherical distiller with positive enhancement contribution leads to minimum cost per liter of produced water.
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    Improvement of Solar Distiller Productivity by a Black Metallic Plate of Zinc as a Thermal Storage Material
    (ASTM International, 2021-03-01) Khechekhouche, Abderrahmane; Ben Haoua, Boubaker; Attia, Mohammed El Hadi; El-Maghlany, Wael M
    The lack of drinking water is a real global problem. Transforming polluted water into freshwater is another problem. Solar distillation seems a simple and economical solution to this problem, but the yield of a solar still is low, and this poses another problem. One of the best ways to improve the productivity of freshwater from solar energy is to incorporate sensible heat energy storage materials; i.e., the temperature elevation of a material allows for the storage of energy, and that is exactly the purpose of our work. Two similar solar distillers were exposed to the sun in May 2017 under the same weather conditions. Distiller Dc is retained as a reference and distiller Ds contains in its basin a black plate of zinc 48 by 48 cm with a thickness of 0.2 cm. This plate is used as a sensitive thermal storage material to improve the productivity of our device. The results of this simple and inexpensive technique have improved the productivity of distiller Ds by 1.54 times compared with the conventional Dc still. Thus, this technique increases the productivity of the distiller and participates in solving a technical problem affecting the solar still.