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مقایسه نتایج تجربی انتقال حرارت نانوسیالات آب/Al2O3 و آب/CuO در کانال مثلثی متساوی الاضلاع در شار حرارتی ثابت دیواره | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 8، دوره 47، شماره 1، شهریور 1394، صفحه 91-99 اصل مقاله (897.05 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2015.466 | ||
| نویسندگان | ||
| سعید زینالی هریس* 1؛ زهرا عدالتی2؛ سید حسین نوعی3 | ||
| 1استادیار داوشکد م ىُدسی داوشگا فردیسی مش دُ ایران | ||
| 2کارشىاسی ارشد داوشکد م ىُدسی داوشگا فردیسی مش دُ ایران | ||
| 3استاد داوشکد م ىُدسی داوشگا فردیسی مش دُ ایران | ||
| چکیده | ||
| بررسی انتقال حرارت جابجایی در کانال های غیر دایره ای جهت استفاده در کاربردهای گرمایشی و سرمایشی بسیار مهم است. انتقال حرارت در این کانال ها پایین بوده ولی افت فشار کمتری نسبت به کانال های دایره ای دارند. در میان کانال های غیر دایره ای، کانال های مثلثی افت فشار کمتر و البته انتقال حرارت نامناسب تری را نشان می دهند. یکی از راه های بهبود انتقال حرارت این مقاطع افزودن نانو ذرات به سیال پایه آب است. در این مقاله انتقال حرارت مقطع مثلثی متساوی الاضلاع با افزودن نانو ذرات Al2O3 و CuO به سیال پایه آب مقطر به صورت تجربی بررسی شده است. مطابق داده های بدست آمده ضریب انتقال حرارت تجربی نانوسیالات مورد استفاده بیشتر از ضریب انتقال حرارت تجربی آب مقطر است.. جهت مقایسه انتقال حرارت نانوسیالات آب/Al2O3 وآب/CuO در کانال مثلثی نمودارهای مربوط به عدد ناسلت و ضریب انتقال حرارت جابجایی رسم شده است که بیانگر افزایش این مقادیر با عدد پکلت و کسر حجمی نانو سیال است. در ضمن عدد ناسلت و ضریب انتقال حرارت جابجایی برای نانو سیال آب/CuO مقادیر بیشتری را نسبت به نانو سیال آب/Al2O3 نشان می دهند | ||
| کلیدواژه‌ها | ||
| نانو سیال آب/Al2O3؛ نانو سیال آب/CuO؛ کانال مثلثی- بهبود انتقال حرارت جابجایی | ||
| عنوان مقاله [English] | ||
| The Comparison between Al2O3/water and CuO/water nanofluids experimental heat transfer performance inside triangular duct | ||
| نویسندگان [English] | ||
| S. Zeinali Heris1؛ Zahra Edalati2؛ S.H. Noie3 | ||
| چکیده [English] | ||
| Experimentally and numerically investigation of triangular ducts heat transfer is very important for many heating and cooling systems because of their very low pressure drop. But/ Nevertheless , this non-circular duct has very bad heat transfer performance. In the present study, the heat transfer performance of triangular ducts using nanofluid as heat transfer media is experimentally investigated. Nanofluid (which is the stable suspension of nanoparticles inside base fluid) is a new kind of heat transfer fluid and has very good potential for the heat transfer enhancement. Two kinds of nanofluid (Al2O3/water and CuO/water) produced and injected to the experimental set up, and the Nusselt number and heat transfer coefficients of these nanofluids are determined experimentally and compared with each other. The result expressed that Cuo/water presents better heat transfer performance compared to Al2O3/water nanofluid. | ||
| کلیدواژه‌ها [English] | ||
| Al2O3/Water Nanofluid, CuO/Water nanofluid, Triangular Duct, Heat transfer enhancement | ||
| مراجع | ||
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