مطالعه مروری برای بهبود عملکرد انتقال حرارت دریافت کننده مرکزی در نیروگاه برج خورشیدی
الموضوعات : یافته های نوین کاربردی و محاسباتی در سیستم های مکانیکیهادی فرجادمهر 1 , نوید بزرگان 2 , علیرضا دنه دزفولی 3
1 - گروه مهندسی مکانیک، موسسه آموزش عالی اروندان خرمشهر، خرمشهر، ایران
2 - گروه مهندسی مکانیک، دانشگاه آزاد اسلامی واحد آبادان
3 - گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه شهید چمران اهواز، اهواز، ایران
الکلمات المفتاحية: انتقال حرارت, دریافت کننده حفره‌ای, نیروگاه برج خورشیدی, لوله‌های دریافت کننده,
ملخص المقالة :
تاکنون تحقیقات متعددی در زمینه بهبود عملکرد دریافت کننده های نیروگاه برج خورشیدی صورت گرفته است. بیشتر این مطالعات، در زمینه تغییر چیدمان آیینه های هلیوستات، انتخاب انواع مختلف سیال به عنوان حامل انرژی گرمایی و تغییر ساختار دریافت کننده می باشد، درحالی که در زمینه تغییر میدان جریان در لوله های دریافت کننده، تحقیقات محدودی صورت گرفته است. در این تحقیق، به بررسی پژوهش های انجام شده جهت شناسایی انواع روش های موثر برای کاهش گرادیان شار حرارتی متغیر و توزیع دمای غیر یکنواخت با استفاده از المان هایی از قبیل بافل ها، کویل ها و نوارهای پیچ خورده درون لوله های دریافت کننده حفره ای برج خورشیدی برای تغییر میدان جریان پرداخته شده است. این المان ها با تغییر رژیم جریان از حالت آرام به جریان آشفته باعث اختلاط بهتر جریان، وکاهش ضخامت لایه مرزی شده که افزایش نرخ انتقال حرارت جابجایی درون لوله دریافت کننده خورشیدی را بهبود می بخشند.
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