ارزیابی انرژی و اگزرژی یک کلکتور خورشیدی سهموی مجهز به لوله‌ جاذب پره داخلی و توربولاتور ستاره‌ای‌‌

علوم کاربردی و محاسباتی در مکانیک

مقاله 7، دوره 36، شماره 2 - شماره پیاپی 36، مرداد 1403، صفحه 97-114   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/jacsm.2023.83484.1199

نویسنده

فرهاد وحیدی نیا^*

گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه زابل، زابل، ایران

چکیده

در این مقاله، عملکرد انرژی و اگزرژی یک کلکتور خورشیدی سهموی خطی حاوی روغن حرارتی با دریافت‌کننده مجهز به پره داخلی و توربولاتور ستاره‌ای‌شکل به صورت عددی مطالعه شده است. جریان سیال داخل لوله جاذب کلکتور به صورت مغشوش و عدد رینولدز در بازه‌ی 104×2 تا 105 در نظر گرفته شده است. به منظور شبیه‌سازی جریان سیال از نرم‌افزار انسیس- فلوئنت استفاده شده است. در این مقاله از یک لوله جاذب جدید مجهز به پره داخلی و توربولاتور ستاره‌ای شکل با پره‌های طولی مستطیلی استفاده شده و لوله جاذب پره مرکب نامیده شده است. بر این اساس عملکرد انرژی و اگزرژی کلکتور با وجود و یا عدم وجود پره و توربولاتور در داخل لوله جاذب در 6 حالت مختلف مقایسه و تحلیل شده است. بررسی نتایج نشان داد که کلکتور با لوله جاذب پره مرکب با پره داخلی بزرگ بیشترین بازده انرژی و اگزرژی را دارد. همچنین بیشترین افزایش بازده انرژی و اگزرژی کلکتور هنگام استفاده از این نوع لوله جاذب به‌جای لوله جاذب ساده به ترتیب برابر با 96/5 و 76/6 درصد است. از طرفی دیگر نتایج نشان داد که مقادیر معیار ارزیابی عملکرد برای لوله‌های جاذب پره مرکب با پره داخلی بزرگ و لوله جاذب پره داخلی بزرگتر از 1 و بیشترین مقدار آن 62/1 نتیجه شد.

کلیدواژه‌ها

کلکتور خورشیدی سهموی خطی؛ لوله جاذب پره مرکب؛ توربولاتور؛ اگزرژی؛ انرژی؛ معیار ارزیابی عملکرد

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