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العنوان
Enhancing the productivity of solar still /
المؤلف
Melad, Ahmad F. Mohamed.
هيئة الاعداد
باحث / أحمد فرج محمد ميلاد
مشرف / جمال إبراهيم أحمد سلطان
مشرف / أحمد عبدالسلام حجازى
مشرف / نبيل أحمد شوقى المنشاوى
الموضوع
Solar stills. Solar energy. Solar radiation. Photovoltaic power generation.
تاريخ النشر
2017.
عدد الصفحات
111 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الميكانيكية
تاريخ الإجازة
01/03/2018
مكان الإجازة
جامعة المنصورة - كلية الهندسة - Mechanical Power Engineering
الفهرس
Only 14 pages are availabe for public view

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Abstract

In this work, an experimental study has been conducted on a solar still to investigate the influence of stone bed layer thickness on the productivity of the solar still. These present experimental study involves two identical solar stills: one of the stills is conventional and the other has a layer of fine stones on the base of the still. The fine stones were divided into three layers. Each experiment starts without stone layer. Then, readings were taken at different thickness of stone bed layer. The average thicknesses of this layer are 10 mm, 15 mm and 20 mm. In addition, the effect of glass cover inclination angle (17o, 22.5o, 26.5o ,31.3o ,36.5o and 41.5o) on solar still productivity; taking into account the effect of stone bed is investigated. The readings were taken from the still for one stone layer, two stone layers and three stone layers in the basin. The outdoors experiments were conducted at Mansoura city, Egypt (31° 04 ′N, 31° 21 ′ E), during winter months. Temperatures at different locations in the still (water in the still, glass cover surface, stone and air – vapor mixture) are measured and recorded with time. In addition, solar radiation, ambient temperature the amount of distillated water are recorded during the experiments at various operating days. The results indicated that the enhancement of 3.79 % ,7.06% and 11.8 % for one, two and three stone bed layer more than the conventional still. Also, it was proved that the efficiency was highest with the maximum stone bed thickness. At glass cover inclination angle of 31.3° with using three stone bed layer, the percentage increase in the still productivity by about 31.5 %.The dissertation contents are five chapters and two appendices as follows: Chapter 1 :Introduction for sun energy and classification of solar still. Chapter 2 :Literature review of the previous works and aim of study. Chapter 3 :Experimental setup parts including measurements devices and the experimental procedure. Chapter 4 Describes the results obtained from the experimental work and discussion. Chapter 5 : Gives the conclusions and recommendations for future work. Appendix A: The recorded experimental data for the tests. Appendix B :Thermocouple calibration and analysis of experimental errors.