ارزیابی تجربی انتقال حرارت رادیاتور تراکتور MF 285 با استفاده از نانو سیال AL2O3+water

ماشین های کشاورزی

مقاله 3، دوره 12، شماره 3 - شماره پیاپی 25، مهر 1401، صفحه 281-299   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/jam.2020.58870.0

نویسندگان

بهمن رحمتی نژاد¹؛ مهدی عباسقلی پور^{* 2}؛ بهزاد محمدی الستی²

¹گروه مهندسی مکانیک، دانشگاه فنی و حرفه‌ای، تهران، ایران

²گروه مهندسی مکانیک بیوسیستم، واحد بناب، دانشگاه آزاد اسلامی، بناب، ایران

چکیده

در این تحقیق به‌منظور بررسی عملکرد حرارتی رادیاتور تراکتور MF 285 با استفاده از نانو سیال، مدل آزمایشگاهی طراحی و ساخته شد. در این مدل آزمایشگاهی آب و اتیلن گلیکول به‌عنوان سیال‌های پایه با نانوذرات AL₂O₃ ترکیب و مورد استفاده قرار گرفتند. از نانوذرات 20 nm با درصدهای حجمی 1 الی 4 درصد استفاده شد. دمای سیال ورودی به رادیاتور حداکثر 85 درجه سانتی‌گراد و سرعت جریان سیال خنک‌کننده  3.18 تا  15.08 لیتر در دقیقه و سرعت جریان هوا از  3.2 تا  6.4 متر در ثانیه متغیر بود. نتایج نشان داد افزایش سرعت جریان مایع خنک‌کننده و سرعت جریان هوا می‌تواند عملکرد انتقال حرارت را بهبود دهد همچنین افزایش کسر حجمی نانوذرات در سیال پایه موجب افزایش نرخ انتقال حرارت و کاهش دمای خروجی می‌گردد. بنابراین با افزایش دور الکتروموتور از Hz 20 به Hz 40 ضریب انتقال حرارت آب خالص به‌طور متوسط 26% و نانو سیال 29% افزایش را نشان می‌دهد. با افزودن 4 درصد حجمی نانوذرات به سیال پایه می‌توان نرخ انتقال حرارت را به‌طور متوسط 37% و ضریب انتقال حرارت جابه‌جایی را 28% نسبت به سیال پایه افزایش داد.

کلیدواژه‌ها

سرعت جریان سیال؛ سرعت جریان هوا؛ عملکرد حرارتی؛ مدل آزمایشگاهی؛ نانوذرات

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