تأثیر استفاده از فین بر جریان سیال و انتقال حرارت در یک کلکتور سهموی خورشیدی به کمک دینامیک سیالات محاسباتی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی مکانیک، دانشگاه صنعتی همدان، همدان، ایران

چکیده

در این تحقیق، جریان متلاطم سیال و انتقال حرارت در کلکتور خورشیدی با فین‌های جامد، متخلخل و همچنین در حالت بدون فین به‌صورت عددی با استفاده از یک مدل دینامیک سیالات محاسباتی سه‌بعدی بررسی شد. هدف این بود که تأثیر نوع فین بر انتقال حرارت و ساختار جریان در اعداد رینولدز مختلف که نسبت نیروهای اینرسی به نیروهای ویسکوز در سیال را نشان می‌دهند، مطالعه شود. یافته‌ها نشان داد که با استفاده از فین متخلخل، ضریب اصطکاک کاهش یافته و عدد ناسلت در مقایسه با فین جامد در کلکتور خورشیدی افزایش یافته است. فین متخلخل با ایجاد اختلاط و گردابه‌های بیشتر در سیال، انتقال حرارت را افزایش داده و درعین‌حال با اجازه دادن به عبور مقداری از سیال ازطریق ساختار فین، افت فشار را کاهش داده است. نتایج این تحقیق می‌تواند بینش‌های مفیدی برای طراحی و بهینه‌سازی کلکتورهای دارای فین فراهم کند.

کلیدواژه‌ها

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