بررسی جریان سیال و انتقال حرارت نانو سیال هیبریدی MWCNT-Fe3O4 داخل جمع کننده ذخیره ساز یکپارچه خورشیدی

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده فنی و مهندسی، دانشگاه دامغان، دامغان، ایران

چکیده

نیاز به انرژی پاک در دنیای امروزی با توجه محدود بودن منابع فسیلی روز به روز در حال افزایش است. انرژی خورشیدی می تواند در مصارف مختلف خانگی، کشاورزی و صنعتی مورد استفاده قرار گیرد. جمع کننده های ذخیره ساز یکپارچه خورشیدی جهت تولید حرارت از طریق دریافت انرژی خورشیدی و تبدیل آن به انرژی حرارتی مورد استفاده فراوان دارد. در نتیجه ضرورت طراحی و تولید این جمع کننده ها به گونه ای که دارای بالاترین عملکرد و بازدهی باشد، بسیار احساس می شود. لذا در این تحقیق با در نظر گرفتن یک نوع جمع کننده ذخیره ساز یکپارچه خورشیدی و با استفاده از نانو سیال هیبریدی MWCNT-Fe3O4 ،تاثیر آن در اعداد رایلی مختلف (103-106) و درصدهای نانوسیال مختلف (0تا 0.003) بررسی شده است. کانتورهای سرعت و دما و خطوط جریان در حالت های مختلف قرارگیری جاذب داغ در داخل کلکتور بررسی گردیده است. اعداد ناسلت موضعی و متوسط نیز بررسی شده است. نتایج نشان دهنده افزایش نرخ انتقال حرارت در عدد رایلی بالا و درصد نانوسیال بالا می باشد. همچنین موقعیت قرار گیری مانع داغ در منتهی الیه سمت راست جمع کننده، بهینه ترین حالت می باشد. نتایج این تحقیق برای اولین بار منتشر گردیده و می تواند برای طراحی کلکتورهای خورشیدی مورد استفاده قرار گیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating of Fluid Flow and Heat Transfer of MWCNT-Fe3O4 Hybrid Nanofluid Inside the Integrated Solar Collector Storage

نویسنده [English]

  • Rasul Mohebbi
School of Engineering, Damghan University, Damghan, Iran; P.O. Box: 3671641167
چکیده [English]

The need for clean energy in today's world is increasing day by day due to the limited nature of fossil resources. Solar energy can be utilized in various domestic, agricultural, and industrial applications. Integrated solar storage collectors are extensively used for generating heat by absorbing solar energy and converting it into thermal energy. Therefore, there is a significant need to design and produce these collectors to achieve the highest performance and efficiency. In this research, considering a type of integrated solar storage collector and using the hybrid nanofluid MWCNT-Fe3O4, its effect at different Rayleigh numbers (103-106) and various nanofluid percentages (0-0.003) has been investigated. Velocity and temperature contours and streamlines in different positions of the hot absorber inside the collector have been examined. The local and average Nusselt numbers have also been studied. The results indicate an increase in heat transfer at the Rayleigh number and a high percentage of nanofluid. Additionally, the optimal position for placing the hot absorber is at the far right end of the collector. The results of this research are published for the first time and can be used for designing solar collectors.

کلیدواژه‌ها [English]

  • Nanofluid
  • Integrated solar collector storage
  • Fluid flow
  • Nusselt number
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