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بررسی تجربی انتقال حرارت جابه‌جایی دوغاب مواد تغییر فاز درون لولهای همراه با پرههای پروانه‌ای | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| مقاله 12، دوره 52، شماره 6، شهریور 1399، صفحه 1561-1576 اصل مقاله (2.04 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2018.14356.5843 | ||
| نویسندگان | ||
| مصطفی مشتاق1؛ احمد جامه خورشید* 2؛ احمد آذری3؛ حسن بازای4 | ||
| 1دانشکده مهندسی نفت، گاز و پتروشیمی، دانشگاه خلیج‌فارس | ||
| 2دانشکده مهندسی نفت، گاز و پتروشیمی، دانشگاه خلیج‌فارس، بوشهر | ||
| 3هیات علمی دانشکده نفت، گاز و پتروشیمی/ دانشگاه خلیج فارس | ||
| 4دانشجو | ||
| چکیده | ||
| در این مطالعه به بررسی اثر اضافه نمودن مواد تغییر فاز به سیال پایه آب و تولید دوغاب مواد تغییر فاز، پرداخته شد. بدین منظور یک دستگاه آزمایشگاهی آماده شد و مورد استفاده قرار گرفت. بخش اصلی این دستگاه شامل لولهای بود که دوغاب مواد تغییر فاز از دورن آن عبور داده میشود. این لوله با سطح مقطع دایرهای میباشد که تحت شار حرارتی ثابتی قرار دارد و مجهز به 6 حسگر دما برای اندازهگیری دمای دیواره و همچنین 2 عدد حسگر دما جهت اندازهگیری دمای سیال ورودی و خروجی میباشد. علاوه بر اثر افزودن مواد تغییر فاز، اثر قرارگیری پرههای پروان های شکل درون لوله نیز مورد مطالعه قرار گرفت و نتایج به دست آمده از هر دو حالت با یکدیگر مقایسه شدند. نتایج نشان داد که افزودن مواد تغییر فاز به سیال پایه میتواند میزان انتقال حرارت را بهطور متوسط تا 41 درصد بهبود بخشد. همچنین با قرارگیری پرههای پروانه-ای در مسیر جریانهای آرام، میزان انتقال حرارت تا 234 درصد برای آب خالص و تا 180 درصد برای دوغاب 10 درصد وزنی مواد تغییر فاز افزایش پیدا کرد. دلیل این امر ایجاد اغتشاش در جریان و از بین رفتن لایهی مرزی گرمایی میباشد. | ||
| کلیدواژه‌ها | ||
| انتقال حرارت جابجایی؛ دوغاب مواد تغییر فاز؛ صفحه‌های پروانه‌ای شکل؛ ذخیره انرژی حرارتی؛ تبادلگر حرارتی | ||
| عنوان مقاله [English] | ||
| An Experimental Investigation of Convective Heat Transfer of Slurry Phase Change Material in a Tube with Butterfly Tube Inserts | ||
| نویسندگان [English] | ||
| mostafa moshtagh1؛ Ahmad Jamekhorshid2؛ Ahmad Azari3؛ hassan bazai4 | ||
| 1Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University | ||
| 2Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr | ||
| 3Assistant Professor of Chemical Engineering/ Persian Gulf University | ||
| 4Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University | ||
| چکیده [English] | ||
| In this study, the effect of adding of microencapsulated phase change material to pure water base fluid as a working fluid was investigated. To this end, a laboratory apparatus was prepared and used. The main part of this setup is a tube which is called test section. The test section has a circular cross- section under a constant heat flux and is equipped with 6 thermocouples for measuring wall temperature at 6 different points as well as 2 thermocouples to measure the inlet and outlet flow temperature into the tube. The effect of butterfly tube inserts was also studied and the results were compared with each other. The results indicated that adding phase change material to base fluid could improve the heat transfer rate up to 41%. In addition, when the butterfly blades were placed in the test section, it was observed that the heat transfer rate increased to 234% for pure water and up to 180% for the slurry with 10 wt% of microencapsulated phase change material. The blades increased heat transfer by creating turbulence in the flow and eliminating the thermal boundary layer. | ||
| کلیدواژه‌ها [English] | ||
| Convective heat transfer, Slurry phase change material, Butterfly tube inserts, Thermal energy storage, Heat exchanger | ||
| مراجع | ||
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