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Effect of Absorber surface shapre on the forced thermal convection of solar air collections

تأثير شكل السطح الماص على الحمل الحراري القسري لمجمعات هوائية شمسية

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 Publication date 2010
and research's language is العربية
 Created by Shamra Editor




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In this research a study effect of absorbed surface shape for solar air collector (Flat V-Corrugated ,Sinusoidal Wave-Corrugated ,Rectangular-Corrugated) titled to the horizontal by an angle(30) on forced heat transfer and skin friction coefficient by Fluent Numerical Program at constant solar heat flax (530W/m2) with Reynold’s number (5000≤Re≤8000). The government equation (mass, momentum and energy) are using Finite Volume by (Fluent 6.3) software for considering steady state, two dimensional and turbulent flow. The results show that the different between inlet and outlet air temperature is(13.65oC) and best heat transfer coefficient enhancement is(63%) for (V-Corrugated plate) compared with the flat plate at (Re=8000). Also the results show that the maximum skin friction coefficient is occurred at (V-Corrugated) Cf=0.22 at (Re=8000).


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Research summary
تتناول هذه الدراسة تأثير شكل السطح الماص على الحمل الحراري القسري لمجمعات الهواء الشمسية. تم استخدام ثلاثة أنواع من الأسطح الماصة: السطح المستوي، السطح المتعرج (V-Corrugated)، والسطح المتموج بشكل مستطيل (Rectangular-Corrugated). تم إجراء المحاكاة العددية باستخدام برنامج Fluent لحل المعادلات التفاضلية الحاكمة للجريان المضطرب ثنائي الأبعاد في الحالة المستقرة. أظهرت النتائج أن أفضل أداء حراري كان للسطح المتعرج (V-Corrugated) بزاوية تعرج 60 درجة، حيث حقق تحسينًا بنسبة 63% في معامل انتقال الحرارة مقارنة بالسطح المستوي. كما أظهرت النتائج أن أعلى معامل احتكاك سطحي كان للسطح المتعرج (V-Corrugated) بقيمة 0.22 عند عدد رينولد 8000. تم التوصل إلى أن شكل السطح الماص يؤثر بشكل كبير على أداء المجمعات الهوائية الشمسية من حيث انتقال الحرارة ومعامل الاحتكاك السطحي.
Critical review
دراسة نقدية: الدراسة تقدم إسهامًا مهمًا في فهم تأثير شكل السطح الماص على أداء المجمعات الهوائية الشمسية. ومع ذلك، يمكن توسيع نطاق البحث ليشمل تجارب عملية للتحقق من النتائج العددية. كما يمكن دراسة تأثير عوامل أخرى مثل زاوية الميل المختلفة للمجمعات وتنوع المواد المستخدمة في تصنيع الأسطح الماصة. بالإضافة إلى ذلك، يمكن تحسين الدراسة بإضافة تحليل اقتصادي لتحديد الجدوى الاقتصادية لتطبيق هذه التصاميم في الواقع العملي.
Questions related to the research
  1. ما هي أنواع الأسطح الماصة التي تم دراستها في البحث؟

    تم دراسة ثلاثة أنواع من الأسطح الماصة: السطح المستوي، السطح المتعرج (V-Corrugated)، والسطح المتموج بشكل مستطيل (Rectangular-Corrugated).

  2. ما هو أفضل أداء حراري تم تحقيقه في الدراسة؟

    أفضل أداء حراري تم تحقيقه كان للسطح المتعرج (V-Corrugated) بزاوية تعرج 60 درجة، حيث حقق تحسينًا بنسبة 63% في معامل انتقال الحرارة مقارنة بالسطح المستوي.

  3. ما هو أعلى معامل احتكاك سطحي تم تسجيله في الدراسة؟

    أعلى معامل احتكاك سطحي تم تسجيله كان للسطح المتعرج (V-Corrugated) بقيمة 0.22 عند عدد رينولد 8000.

  4. ما هي البرامج التي تم استخدامها في المحاكاة العددية؟

    تم استخدام برنامج Fluent لحل المعادلات التفاضلية الحاكمة وبرنامج Gambit لبناء النموذج الهندسي والتوليد الشبكي الخاص بالمسألة.


References used
Alison Mason, Fort Collins, Jim Welch, Cindy Kline Isenhour Richard “Solar Air Heating on Ridge Indian Reservation Promising Application of a Tried and True Solar Technology ”
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539  - 0  - -  Adam Mousa was published in field ( Physics)
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