بررسی عملکرد خشک کن خورشیدی مجهز به سامانۀ بازیافت حرارتی برای خشک کردن نعناع

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد بخش مهندسی مکانیک بیوسیستم، دانشکدۀ کشاورزی، دانشگاه شهید باهنر کرمان

2 استادیار بخش مهندسی مکانیک بیوسیستم، دانشکدۀ کشاورزی، دانشگاه شهید باهنر کرمان

3 دانشیار بخش مهندسی مکانیک بیوسیستم، دانشکدۀ کشاورزی، دانشگاه شهید باهنر کرمان

چکیده

خشک‌کردن محصولات کشاورزی فرایندی پیچیده با مصرف انرژی فراوان است. تأمین انرژی لازم برای ادامۀ حیات، از چالش‏های پیش روی بشر است. در پژوهش حاضر، عملکرد خشک‏کنی خورشیدی مجهز به سامانۀ بازیافت حرارتی بررسی می‏شود. نرخ خشک‌شدن، بازده جمع‏کننده، مقدار مصرف انرژی، سهم انرژی خورشیدی، و سهم انرژی بازیافتی در سه سطح دما (45، 55، و 65 درجۀ سلسیوس) و سه سطح دبی هوای خشک‏کننده (04/0، 06/0، و 08/0 کیلوگرم بر ثانیه) محاسبه و مقایسه شدند. نتایج تحقیق نشان داد که با افزایش دمای هوای خشک‏کننده، مصرف انرژی 25درصد کاهش یافت. همچنین، بالابردن دمای هوای خشک‏کننده از 45 تا 65 درجۀ سلسیوس موجب کاهش 24درصدی در سهم انرژی خورشیدی و افزایش 20درصدی سهم انرژی بازیافتی شد. بازده جمع‏کنندۀ خورشیدی با افزایش دبی هوای عبوری و کاهش دمای خشک‏کنی بهبود یافت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Performance Investigation of a Heat Recovery Assisted Solar Dryer for Mint Drying

نویسندگان [English]

  • Milad Hedayat 1
  • Hamid Mortezapour 2
  • Hossein Maghsoudi 2
  • Mohsen Shamsi 3
1 Student in Biosystems Engineering Department, Shahid Bahonar University of Kerman
2 Assistant Professor in Biosystems Engineering Department, Shahid Bahonar University of Kerman
3 Associate Professor in Biosystems Engineering Department, Shahid Bahonar University of Kerman
چکیده [English]

Drying of agricultural products is a sophisticated process with high energy consumption. Energy needed for sustainable development, is one of the biggest challenges facing humanity. The performance of a heat recovery assisted solar dryer was evaluated in this study. Drying time, collector efficiency, energy consumption, solar fraction and energy recovery fraction were investigated at different drying air temperatures (45, 55 and 65 oC) and three levels of air flow rate (0.04, 0.06 and 0.08 kg/s). The results showed that collector efficiency decreased at higher drying temperatures and lower air flow rates. Increasing the air temperature from 45 to 65 oC reduced energy consumption by 25%. Meanwhile, the air temperature rise decreased solar fraction by 24% while improved energy recovery fraction by 20%.

کلیدواژه‌ها [English]

  • Collector Efficiency
  • Solar Dryer, Heat Recovery System
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