ارزیابی سه روش برای جداسازی دانه‌های کدو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 پردیس کشاورزی و منابع طبیعی دانشگاه تهران

2 عضو هیأت علمی گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی و فناوری، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

3 گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی و فناوری، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

چکیده

با هدف بالا بردن کیفیت جداسازی دانه­های کدو به بررسی سه روش­ جداسازی دانه­های پوک از مغزدار پرداخته شده است. در روش اول جداسازی برپایه‌ی ظرفیت گرمایی دانه­ها به کمک اندازه‌گیری دمای دانه­ها توسط دوربین حرارتی و بررسی روند سرد شدن­دانه­ها انجام شد. در روش دوم سرعت حد دانه­ها توسط محاسبات تئوری تعیین و سپس توسط آزمایش عملی به کمک یک فن مورد ارزیابی قرار گرفتند. در روش سوم نیز به کمک محاسبات تئوری و تعیین نیروی اصطکاک و الکترواستاتیک دانه­ها، کارایی این روش نیز به صورت عملی و توسط یک صفحه چرخان مورد بررسی قرار گرفت. این روش­ها بر اساس دقت، هزینه، زمان مورد نیاز فرایند، و تجهیزات استفاده شده مورد بحث و بررسی قرار گرفتند. در این بررسی مشخص گردید دقت جداسازی بر پایه ظرفیت گرمایی (100%) نسبت به سایر روش­ها بالاتر بوده و پس از آن به ترتیب جداسازی بر اساس سرعت حد (%93) و ضریب اصطکاک (86%) قرار دارند.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Three Methods for Separating Pumpkin Seeds

نویسندگان [English]

  • parsa haidary 1
  • Ali Hajiahmad 2
  • Amir Hossein Mirzabe 3
1 College of Agriculture & Natural Resources, University of Tehran
2 Department of Mechanics of Biosystem Engineering, Faculty of Engineering & Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3 Department of Mechanics of Biosystem Engineering, Faculty of Engineering & Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

Three methods of separating hollow from fill seeds have been studied to improve the separation quality of pumpkin seeds. In the first method, the seperation was performed based on seeds’heat capacity by measuring the seeds’ temperature with a thermal camera and examining the seeds’ cooling process. In the second method, the seeds’ terminal velocities were obtained by theoretical calculations and then examined by a practical experiment using an electro-fan. In the third method, with theoretical calculations and obtaining the frictional and electrostatic forces, this method’s efficiency was evaluated in practice by a rotating disc. These three methods were evaluated based on accuracy, cost, required time of the process, and equipment used. In this study, it was found that the accuracy of the separation method based on heat capacity (100%) is higher than all methods, followed by the method based on limit velocity (93%) and coefficient of friction (86%), respectively.

کلیدواژه‌ها [English]

  • Thermal imaging
  • terminal velocity
  • image processing
  • electrostatic
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