Browsing by Author "Bellila, Abdelkader"

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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.
Effect of using sponge pieces in a solar still
(جامعة الوادي - university of el oued, 2022-07-22) Bellila, Abdelkader; Kemerchou, Imad; Sadoun, Ali; Driss, Zied
Solar distillation is a very effective way to obtain pure water, especially in isolated areas where the water is infected or polluted to obtain drinking water. Two conventional solar stills of the same size (0.5 x 0.5 m) were tested for 8 hours. One still is priced as an SSR reference still and the other still which contains pieces of sponge is SSM and that is the subject of our work. The results show that the use of sponge in winter improves the yield of 10 %.
Experimental investigation of the performance of the solar still filled with a hybrid nanofluid
(Universty of Eloued جامعة الشهيد حمة لخضرالوادي, 2023-01-25) Bellila, Abdelkader
This thesis is divided into two parts. Part one: a comparative energy and exergy efficiency study of hemispherical solar still and a single-slope solar still. The overall daily productivity was improved by 47.96% for the hemispherical solar still compared to the single-slope solar still. The maximum daily energy efficiency and exergy efficiency of the single-slope solar still are 25.81 and 1.8%, respectively, and for hemispherical solar still are 38.61 and 3.1%, respectively. The main conclusion from the study is the hemispherical distillery greatly enhances productivity as compared to the single slope distillate and gives more efficiency. Thus, the hemispherical solar still is recommended to be used to provide safe drinking water from salty water. Part two: The hemispherical distiller characteristics are having a large surface area for receiving and condensing compared to a conventional single-slope distiller. To achieve the maximum possible utilization of this feature, in first the Al2O3 nanoparticles were adding to the basin water to increase the evaporation rate, in the second modification the glass cover cooling technology was utilized to increase the condensation rate. To investigate the influences of Al2O3-water nanofluid and the glass cover cooling technology by a water sprinkler on hemispherical solar distiller performance, three hemispherical solar distillers were designed and tested in the same climate conditions. The first is the reference case (conventional hemispherical solar distiller), second is the modified hemispherical solar distiller with Al2O3-water nanofluid, and the third is the modified hemispherical solar distiller with Al2O3-water nanofluid and water sprinkler. Three different concentrations of Al2O3 nanoparticles 0.1, 0.2, and 0.3% were studied. Results showed that, the improvement 41.8, 50.9, and 61.3% of the volume friction of 0.1, 0.2, and 0.3%, respectively. Also, the improvement for utilizing the Al2O3 nanoparticles and water sprinkler reached 105.8, 110.4, and 121% for nanoparticle concentrations 0.1, 0.2, and 0.3%, respectively as compared to the reference case. تنقسم هذه الأطروحة إلى قسمين. القسم الأول: دراسة مقارنة للطاقة وكفاءة الطاقة للمقطرات الشمسية نصف الكروية وأحادية المنحدر. تم تحسين الإنتاجية اليومية الإجمالية بنسبة 47.96 ٪ للمقطرات الشمسية نصف الكروية مقارنةً بالمقطرات الشمسية أحادية المنحدر. الحد الأقصى لكفاءة الطاقة اليومية وكفاءة الطاقة للمقطرات الشمسية أحادية المنحدر هي 25.81 و 1.8٪ على التوالي، وبالنسبة للمقطرات الشمسية نصف الكروية 38.61 و 3.1٪ على التوالي. الاستنتاج الرئيسي من الدراسة هو أن جهاز التقطير النصف كروي يعزز الإنتاجية بشكل كبير بالمقارنة مع نواتج التقطير أحادية المنحدر ويعطي المزيد من الكفاءة. وبالتالي، يوصى باستخدام جهاز التقطير الشمسي النصف كروي لتوفير مياه شرب آمنة من المياه المالحة. الجزء الثاني: تتميز خصائص جهاز التقطير نصف الكروي بمساحة كبيرة للاستقبال والتكثيف مقارنة بجهاز التقطير الشمسي أحادية المنحدر. لتحقيق أقصى استفادة ممكنة من هذه الميزة ، في البداية تم إضافة جزيئات Al2O3 النانوية إلى ماء الحوض لزيادة معدل التبخر، وفي التعديل الثاني تم استخدام تقنية تبريد الغطاء الزجاجي لزيادة معدل التكثيف. للتحقيق في تأثيرات السائل النانوي المائي Al2O3 وتقنية تبريد الغطاء الزجاجي بواسطة رشاش ماء على أداء جهاز التقطير الشمسي نصف كروي، تم تصميم واختبار ثلاثة مقطرات شمسية نصف كروية في نفس الظروف المناخية. الأول هو الحالة المرجعية (المقطر الشمسي التقليدي)، والثاني هو المقطر الشمسي نصف كروي المعدل باستخدام مائع نانوي الماء Al2O3 ، والثالث هو المقطر الشمسي نصف كروي المعدل باستخدام سائل نانوي ماء Al2O3 مع تبريد الغطاء. تمت دراسة ثلاثة تراكيز مختلفة من جزيئات Al2O3 النانوية 0.1 و 0.2 و 0.3٪. أظهرت النتائج أن نسبة التحسن هي 41.8 و 50.9 و 61.3٪ عند استخدام جزيئات Al2O3 النانوية بالتراكيز 0.1 و 0.2 و 0.3٪ على التوالي. كما بلغ التحسن 105.8 و 110.4 و 121٪ عند استخدام تركيزات الجسيمات النانوية 0.1 و 0.2 و 0.3٪ على التوالي، مع تبريد الغطاء، مقارنة بالحالة المرجعية
Productivity enhancement of hemispherical solar still using Al2O3-water-based nanofluid and cooling the glass cover
(Springer International Publishing, 2021-04) Bellila, Abdelkader; Attia, Mohammed El Hadi; AE Kabeel, Mohamed; Harby, Abdelgaied K; Soli, Jihan
The hemispherical distiller characteristics are having a large surface area for receiving and condensing compared to a conventional single-slope distiller. To achieve the maximum possible utilization of this feature, in first the Al2O3 nanoparticles were adding to the basin water to increase the evaporation rate, in the second modification the glass cover cooling technology was utilized to increase the condensation rate. To investigate the influences of Al2O3-water nanofluid and the glass cover cooling technology by a water sprinkler on hemispherical solar distiller performance, three hemispherical solar distillers were designed and tested in the same climate conditions. The first is the reference case (conventional hemispherical solar distiller), second is the modified hemispherical solar distiller with Al2O3-water nanofluid, and the third is the modified hemispherical solar distiller with Al2O3-water nanofluid and water sprinkler. Three different concentrations of Al2O3 nanoparticles 0.1, 0.2, and 0.3% were studied. Results showed that, the accumulative yield of traditional hemispherical solar distiller reached 3280 ml/m2/day, while the utilization of Al2O3-water nanofluid and the water sprinkler improve the accumulative yield to 6750, 6900, and 7250 ml/m2/day, with improvement 105.8, 110.4, and 121% of the volume friction of 0.1, 0.2, and 0.3%, respectively. Also, the improvement in the daily efficiency for utilizing the Al2O3 nanoparticles and water sprinkler reached 105.7, 109.7, and 120.1% for nanoparticle concentrations 0.1, 0.2, and 0.3%, respectively as compared to the reference case.