اعلانات هامة

A pilot sloped solar updraft power plant has been erected in the campus of Mechanical and Electrical faculty of Damascus University. Experimental data were recorded every 10[min] 24[h] a day during summer to investigate the prototype performance and the temperature changes in the sloped collector. Although the prototype dimensions were small, the air temperature difference between the ambient temperature and the air temperature in the collector outlet was enough to generate an adequate updraft airstream in the chimney. The maximum recorded difference in temperature was 16.6 [°C]. As a result of this experiment, it is obvious that any change in the solar radiation and the ambient temperature has a direct impact on varying the air temperature between the collector outlet and the ambient. It was also noticed that the absorption layer emits most

of stored thermal energy, which is absorbed from the morning to noon, back to the collector air mainly in the first three hours when solar radiation starts to decrease in the afternoon. This leads to controlling the collector outlet air temperature.

Keywords: solar energy, solar chimney power plant, solar collector, prototype.

تم بناء منصة اختبارية لمحطة المدخنة الشمسية المائلة ضمن حرم كلية الهندسة الميكانيكية والكهربائية بجامعة دمشق، وسجلت القياسات التجريبية المختلفة كل عشر دقائق على مدار الساعة يوميا خلال فصل الصيف لدراسة وتقييم اداء اللاقط الشمسي وتغيرات درجة الحرارة للمنصة الإختبارية . على الرغم من أن ابعاد المنصة الإختبارية كانت صغيرة الا أن فرق درجة حرارة الهواء بين مخرج اللاقط والوسط المحيط وصل الى قيم كانت كافية لتوليد تيار هواء صاعد في المدخنة وصلت قيمته العظمى ل16.6 [c].