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Simulation of Solar Compound Parabolic Collector (CPC) Without solar tracking system

محاكاة لاقط القطع المكافئ المركب الشمسي ذو مستقبل أنبوبي (CPC) باستخدام تقنية تتبع الشعاع

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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The aim of current work is to develop a mathematical model designed by Rabl for compound parabolic collector (CPC) using tubular receiver instead of the flat receiver. The simulation was carried out for reflection of direct and indirect solar radiation incident on the compound parabolic collector. The equations were evaluated using analytical geometry for calculating the Cartesian coordinates of the reflecting surface, then the falling and reflected rays on the detector were calculated. A MATLAB program was developed to generate the data and print the reflected rays through the use of 10000 rays at random position according to the random Monte Carlo simulation for each angle of the rays. We found that the optimum value of half acceptance angle is 35. This investigation showed that the efficiency of compound parabolic collector decreases with increasing the radius and length of receiver at the same inlet temperature of working fluid. Also showed that the efficiency of compound parabolic collector with tubular receiver is higher than collector with flat receiver at the same conditions.


Artificial intelligence review:
Research summary
يهدف هذا البحث إلى تطوير نموذج رياضي للاقط القطع المكافئ المركب الشمسي باستخدام مستقبل أنبوبي بدلاً من المستقبل المسطح. تم استخدام تقنية تتبع الشعاع ومحاكاة مونتي كارلو العشوائية لمحاكاة انعكاس الإشعاع الشمسي المباشر وغير المباشر على اللاقط. تم حساب الإحداثيات الديكارتية للسطح العاكس باستخدام الهندسة التحليلية، وتم تطوير برنامج MATLAB لتوليد البيانات وحساب الأشعة المنعكسة باستخدام 10000 شعاع عشوائي لكل زاوية شعاع. أظهرت النتائج أن مردود اللاقط ينخفض بزيادة نصف قطر المستقبل وطوله عند نفس درجة حرارة الدخول للوسيط الناقل. كما أظهرت أن مردود اللاقط ذو المستقبل الأنبوبي أعلى من مردود اللاقط ذو المستقبل المسطح عند نفس الشروط. تم التوصل إلى أن زاوية نصف القبول المثلى هي 35 درجة، مما يسمح بجمع معظم الإشعاع الشمسي على مدار السنة دون الحاجة إلى نظام تتبع شمسي. أوصى البحث بإجراء دراسة عملية لهذا النوع من المركزات باستخدام آلة تصنيع باستخدام الحاسب وجهاز توليد إشعاع منتظم لدراسة الخواص الفيزيائية للاقط.
Critical review
دراسة نقدية: يقدم البحث نموذجاً رياضياً متقدماً للاقط القطع المكافئ المركب الشمسي، ويعتمد على محاكاة مونتي كارلو العشوائية وتقنية تتبع الشعاع، مما يعزز من دقة النتائج. ومع ذلك، يمكن توجيه بعض الانتقادات البناءة للبحث. أولاً، لم يتم التحقق من صحة النموذج الرياضي من خلال تجارب عملية، مما يجعل النتائج النظرية بحاجة إلى تأكيد عملي. ثانياً، قد يكون من المفيد توسيع الدراسة لتشمل تأثيرات بيئية مختلفة مثل التغيرات المناخية والغبار على أداء اللاقط. ثالثاً، يمكن تحسين البحث من خلال مقارنة الأداء مع أنواع أخرى من المركزات الشمسية لتقديم صورة أشمل عن فعالية اللاقط المقترح.
Questions related to the research
  1. ما هو الهدف الرئيسي من البحث؟

    الهدف الرئيسي هو تطوير نموذج رياضي للاقط القطع المكافئ المركب الشمسي باستخدام مستقبل أنبوبي بدلاً من المستقبل المسطح.

  2. ما هي التقنية المستخدمة لمحاكاة انعكاس الإشعاع الشمسي؟

    تم استخدام تقنية تتبع الشعاع ومحاكاة مونتي كارلو العشوائية لمحاكاة انعكاس الإشعاع الشمسي.

  3. ما هي زاوية نصف القبول المثلى التي توصل إليها البحث؟

    زاوية نصف القبول المثلى هي 35 درجة.

  4. ما هي التوصيات التي قدمها البحث لإجراء دراسات مستقبلية؟

    أوصى البحث بإجراء دراسة عملية لهذا النوع من المركزات باستخدام آلة تصنيع باستخدام الحاسب وجهاز توليد إشعاع منتظم لدراسة الخواص الفيزيائية للاقط.


References used
Tchinda,R; Kaptouom,E; Njomo,D. Study of the C.P.C. collector thermal behaviour, Energy Convers.Mgmt Vol. 39, No. 13, pp. 1395-1406, 1998
B. Norton, A. F. Kothdiwala and P. C. Eames. Effect of Inclination on the Performance of CPC Solar Energy Collectors, Renewable Energy, Vol.5, Part I, pp. 357- 367, 1994
Oommen,R; Jayaraman,S. Development and performance analysis of compound parabolic solar concentrators with reduced gap losses – oversized reflector, Energy Conversion and Management 42, 1379-1399, 2001
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551  - 0  - -  Adam Mousa was published in field ( Physics)
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