کاربرد دینامیک سیالات محاسباتی(CFD) در طراحی بهینه صفحه جاذب خشک‌کن خورشیدی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه فنی کشاورزی - پردیس ابو ریحان - دانشگاه تهران

2 دانشگاه تهران

3 3. بخش مهندسی مکانیک بیوسیستم، دانشگاه کردستان

4 گروه فنی کشاورزی - پردیس ابوریحان - دانشگاه تهران

چکیده

یکی از کاربردهای انرژی خورشیدی، در خشک­کن خورشیدی می­باشد. اما این نوع خشک­کن­ها دارای بازدهی پائینی هستند که برای افزایش بازده و صرفه­جویی در مقدار انرژی مصرفی بهینه­سازی صفحه جاذب آن­ها در اولویت قرار دارد. بدین­منظور، جریان هوای داخل محفظه صفحه جاذب خشک­کن خورشیدی با استفاده از روش مدل‌سازی دینامیک سیالات محاسباتی (CFD) شبیه­سازی شد سپس روند انتقال حرارت، توزیع جریان و سرعت هوای داخل محفظه تحلیل گردید و بصورت آزمایشگاهی صفحات مختلف جاذب مورد مقایسه قرار گرفتند. در این تحقیق سه حالت مختلف صفحه جاذب با ورودی­ یکسان و سه حالت خروجی متفاوت (دایره­ای، متداول و متخلخل) بررسی شد که در صفحه با خروجی متخلخل، صفحه با ضریب تخلخل 0314/0 استفاده شد. نتایج نشان داد که بین داده­های تحلیلی و تجربی، ضریب تبیین (R2) بالای 97 درصد برقرار بود. در صفحات دایره­ای و متداول انباشت حرارتی در گوشه­ها وجود داشت که با تغییر در نوع خروجی و تبدیل آن به حالت خروجی متخلخل از تلفات گرمایی و انباشت حرارت جلوگیری بعمل آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Application of CFD in optimization of solar dryer absorber plate

نویسندگان [English]

  • Mernush Motahayyer Razdari 1
  • Akbar Arabhosseini 2
  • Hadi Samimi Akhijahani 3
  • Morteza Khashehchi 4
1 University of Tehran, Aburaihan campus
3 University of Kurdistan
4 University of Tehran - Abouraiahan Campus
چکیده [English]

One of the ways to use solar energy is to use a solar dryer. But these kind of dryers have low efficiency that optimizes their absorbent plate to increase efficiency and save energy. For this purpose, the air flow inside the compartment of the adsorbent plate of the solar dryer was simulated using the computational fluid dynamics modeling and the heat transfer process, flow distribution and air velocity inside the compartment were analyzed and finally, the plates were compared in vitro. In this research, three different modes of the page with the same input and three different output modes (circular, conventional and perforated) were investigated. In a porous sheet with porosity, the plate was used with a coefficient of 0.0314. The results showed that between analytical and empirical data, the explanatory factor (R2) was above 97%. There are circular and conventional heat accumulation in the corners, which, by changing the type of output and converting it to the perforated output state, Heat and heat accumulation are prevented.

کلیدواژه‌ها [English]

  • Dryer
  • Absorbent plate
  • ANSYS
  • Computational Fluid Dynamics
  • Heat transfer
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