الخواص الحرارية-الفيزياوية لأنواع مواد مختلفة من وسائد التبريد التبخيري
الشريط الجانبي للمقالة
محتوى المقالة الرئيسي
الملخص
يحظى التبريد التبخيري بفوائد أكثر من تلك للأنظمة التقليدية من ناحية التكلفة الاقتصادية وطرق التشغيل واستهلاك الطاقة وبعدم وجود تلوث الناتج من الغازات الفلوروكاربونية ودورها في زيادة الدفء العالميز بالرغم من أن وسائد التبريد تلعب دورًا محوريًا في التبريد التبخيري، فإن خواصها الحرارية- الفيزياوية لم تدرس بصورة مستفاضة. لذلك في البحث الحالي تم اختبار الخواص الحرارية-الفيزياوية لأربعة مواد طبيعية كوسائد تبريد، والخواص المدروسة هي الموصلية الحرارية والمسامية والسماحية والكثافة والمحتوى الرطوبي. أما مواد وسائد التبريد فكانت القش والكرتون المموج وألياف النخيل والعاقول. أوضحت النتائج أن العاقول يتمتع بأعلى موصلية حراري (0.0395 W/m.K) بينما كانت ألياف النخيل أقلها (0.032 W/m.K). كثافة العاقول كانت هي الأعلى (704.5 kg/m3) وألياف النخيل الأوطأ (355.76 kg/m3). من وجهة نظر اقتصادية من ناحية تكاليف الإنتاج والتصنيع، فقد وجد أن العاقول هو الأقل تكلفة، بينما كان الكارتون المموج هو الأعلى تكلفة. تترتب المواد المدروسة من الأعلى إلى الأوطأ مسامية كما يلي: ألياف النخيل، القش، الكارتون المموج، ثم العاقول. بينما يمكن ترتيب المواد من حيث السماحية من الأعلى قيمة إلى أوطأها كما يلي: أليف النخيل، القش، الكارتون المموج، ثم العاقول. وبناءً عليه يمكن اعتبار العاقول مادة ممتازة لوسائد التبريد التبخيري سواء في المنازل أو بيوت الدواجن أو القاعات نتيجة اداؤه الحراري-الفيزياوي الجيد وتكلفته الواطئة.
تفاصيل المقالة
القسم
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