تحلیل اکسرژی برای خشک‌کردن شلتوک نیم جوش در خشک‌کن ترکیبی مادون‌قرمز - هوای گرم

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی مکانیک بیوسیستم دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران

2 دانشیار، گروه مهندسی فناوری کشاورزی، دانشکده کشاورزی و منابع طبیعی مغان، دانشگاه محقق اردبیلی، اردبیل، ایران

3 دانشیار، گروه مهندسی مکانیک بیوسیستم دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران

10.22104/jift.2020.3831.1908

چکیده

تحلیل اکسرژی برای تعیین مقدار بازده و تلفات اکسرژی با استفاده قانون دوم ترمودینامیک انجام می‌شود. در این مطالعه، یک سیستم خشک‌کن ترکیبی مادون‌قرمز - هوای گرم برای خشک‌کردن شلتوک نیم‌جوش (رقم فجر) موردمطالعه قرار گرفت و تحلیل اکسرژی فرایند خشک‌کردن آن در مقیاس آزمایشگاهی بررسی شد. آزمایش‌ها، در سرعت هوای ورودی m/s 1، شدت تابش مادون‌قرمز 32/0 و W/〖cm〗^2 49/0 و دمای هوای ورودی 40، 50 و °C60 صورت گرفت. نتایج نشان داد که بیشترین بازده اکسرژی مربوط به دمای ورودی °C 60 با مقدار متوسط 66 % و کمترین تلفات اکسرژی مربوط به دمای هوای ورودی °C 40 با میزان متوسط KJ/s 33/1 می‌باشد. متوسط بازده اکسرژی برای شدت تابش W/〖cm〗^2 49/0 در سه دمای 40، 50 و °C60 به ترتیب 6/8، 23/1 و 28/7% بالاتر از متوسط بازده اکسرژی در شدت W/〖cm〗^2 32/0 بود. این مطالعه نشان داد که خشک‌کن ترکیبی مادون‌قرمز - هوای گرم ترکیبی دارای بازده اکسرژی بالا و کارآمد در خشک‌کردن شلتوک نیم جوش است که این بازده با افزایش دمای هوای ورودی و شدت تابش افزایش می‌یابد.

چکیده تصویری

تحلیل اکسرژی برای خشک‌کردن شلتوک نیم جوش در خشک‌کن ترکیبی مادون‌قرمز - هوای گرم

تازه های تحقیق

  • تحلیل اکسرژی خشک‌کن ترکیبی مادون قرمز - هوای گرم در خشک کردن شلتوک برنج
  • تحلیل اکسرژی برای تعیین مقدار بازده در طول فرآیند خشک کردن
  • تحلیل اکسرژی برای تعیین تلفات اکسرژی در طول فرآیند خشک کردن
  • تحلیل اکسرژی در سه دما و شدت تابش متفاوت

کلیدواژه‌ها


عنوان مقاله [English]

Exergy Analysis for Parboiled Paddy Drying in Infrared - Hot Air Combined Dryer

نویسندگان [English]

  • Ali Kiapey 1
  • Ebrahim Taghinezhad 2
  • Mahdi Ghasemi-Varnamkhasti 3
  • Mostafa Bahrami 1
1 Department of Mechanical Engineering of Biosystems, Shahrekord University, Shahrekord, Iran.
2 Department of Agricultural Technology Engineering, Moghan College of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
3 Associate professor, Shahrekord University
چکیده [English]

Exergy analysis is performed to determine the exergy yields and losses using the second law of thermodynamics. In this study, an infrared-hot air combined dryer system was studied for drying of parboiled paddy (Fajr variety) and the exergy analysis of its drying process was investigated in laboratory scale. Experiments were performed at 1 m/s inlet speed 0.32 and 0.49 W/〖cm〗^2 infrared radiation as well as three inlet air temperatures of 40.50 and 60 ° C. The results showed that the highest exergy efficiency was at 60 ° C with an average value of 66% and the lowest exergy loss was at temperature of 40 ° C with an average of 1.33 kJ/s. The average exergy efficiency for 0.49 W/〖cm〗^2 at three temperatures of 40, 50, 60 ° C was 8.6, 1.23 and 7.28% higher than the average exergy efficiency at 0.32 W/〖cm〗^2, respectively. This study shows a successful and efficient combination of infrared and hot air in parboiled paddy drying. This study shows a high exergy efficiency and efficient combination of infrared and hot air in parboiled paddy drying which increases the efficiency by increasing the inlet hot air and infrared radiation.

کلیدواژه‌ها [English]

  • Exergy
  • Drying
  • Hot Air
  • Parboiled Paddy
  • Infrared
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