بررسی اثر استفاده از بلوک‌های سفالی توخالی پر شده با کاه گندم فشرده به عنوان عایق گرمایی

نوع مقاله : مقاله مروری

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج، ایران

2 دانشیار، گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج، ایران

3 دانشیار، گروه مکانیک، دانشکده مهندسی، دانشگاه کردستان، سنندج، ایران

چکیده

کاه گندم از جمله ضایعات بخش کشاورزی است که در اراضی زراعی سوزانده می‎شود و منجر به ورود گازهای گلخانه‌ای به جو می‎گردد. هدف این مطالعه ارزیابی اتلاف انرژی گرمایی از دیواره بیرونی ساختمان هنگامی که با استفاده از بلوک‌های سفالی توخالی پر شده با کاه گندم فشرده ساخته شده است می‌باشد. از این رو  بلوک‌های سفالی توخالی در قیاس با حالتی که به وسیله کاه گندم فشرده (دارای تراکم g cm-3 156/0) پر شده‌اند برای ساخت دیواره‎های یک مدل محفظه آزمایشی در فضای باز استفاده شد و اتلاف انرژی گرمایی از دیواره‌های آن مورد ارزیابی قرار گرفت. مقایسه خصوصیات حرارتی دیواره‌های ساخته شده از بلوک‌های سفالی عایق نشده/شده با استفاده از کاه گندم فشرده شامل: رسانایی گرمایی، آهنگ انتقال گرما و ضریب انتقال گرمای کلی کاهش پارامترهای مذکور به ترتیب از 2/0 به W m-1 °C-1 04/0 ، 36/18 به  W m-2 98/6 و 7/1 به W m-2 °C-1 41/0 در دیواره‌های عایق شده را تایید نمود. نتایج آشکار ساخت که  کاربرد کاه فشرده می‎تواند بین 72 تا 81 درصد اتلاف انرژی گرمایی از دیواره‌های ساختمان را کاهش دهد.                     

کلیدواژه‌ها

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