تحلیل انرژی و اگزرژی و بررسی راهکارهای کاهش مصرف سوخت در واحدهای دست‌پز پخت نان‌های سنتی مسطح

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مکانیک، دانشگاه کاشان، ایران

2 دانشکده مهندسی مکانیک، دانشگاه کاشان، ایران - شرکت فنی و مهندسی فنآفرینی آلتون، اصفهان، ایران

چکیده

در تحقیق حاضر، با انجام آزمایشهای تجربی، تحقیقات میدانی و محاسبات تحلیلی، ابتدا برآورد دقیقی از بازده انرژی
و اگزرژی و همچنین تلفات انرژی و مصرف سوخت انواع مختلف تنورهای دستپز پخت نانهای سنتی مسطح انجام میشود و
سپس راهکارهای کاربردی برای کاهش مصرف سوخت این نانواییها ارائه میشود. طبق نتایج، بازده انرژی تنورهای سنگک،
بربری و تافتون بسیار پایین و بهترتیب در حدود % 12% ،21و % 5است. همچنین تحلیل اگزرژی نشان میدهد که در مورد
تمام نانواییها، انرژی تلفشده از دودکش تنور از لحاظ ترمودینامیکی کیفیت بازیافت بالایی ندارد و سهم اصلی تلفات اگزرژی
در این واحدها مربوط به احتراق سوخت و تلفات حرارتی از جدارههای تنور است. نتایج نشان میدهند که با انجام عایقکاری
برای تنورهای نانوایی میتوان تا حدود % 65تلفات حرارتی از جدارهها را کاهش داد. همچنین مشخص شد که با کاهش مقدار
هوای اضافی ورودی به مشعل تا % ،5میتوان تلفات حرارتی در اثر هوای اضافی را بیش از % 90کاهش داد. در نهایت مشخص
شد که با انجام راهکارهای فوق، میتوان بازده انرژی و اگزرژی تنورهای نانوایی سنگک، بربری و تافتون را افزایش و مصرف
سالیانه گاز طبیعی را برای این واحدها، بهترتیب در حدود % 66% ،58و % 82کاهش داد


کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Energy and Exergy Analyzes and Evaluation of Traditional Flatbread Bakeries

نویسندگان [English]

  • S. Abdolmehdi Hashemi 1
  • S. Sadripour 2
  • M. Estajloo 1
1 Department of Mechanical Engineering, University of Kashan, Kashan, Iran
2 Department of Mechanical Engineering, University of Kashan, Kashan, Iran
چکیده [English]

In this study by experimental measurements and mathematical methods, the energy and exergy efficiencies, wasting energies and fuel consumptions of different traditional flatbreads bakeries are obtained. The knowledge about these parameters can pave the way to find useful solutions for reducing energy consumptions in bakeries. Based on obtained results, the energy efficiencies of Sangak, Barbari and Taftun bakeries are about 21%, 12% and 5%, respectively. On the other side, the exergy analyzes for these bakeries illustrate that thermo-dynamical quality of wasted energy of flue gases is low for Sangak and Barbari bakeries. According to results, usage of insulator for side-walls and roof of oven and reducing excess air in combustion reaction, are useful solutions to decease wasting fuel in bakeries. By using insulator for walls and roof of oven the wasted energy of walls can reduce about 65%. Also by controlling the combustion reaction to perform with 5% excess air the wasted energy of excess air decreases about 90%. Finally, it was cleared that above solutions can increase the energy and exergy efficiencies of bakeries and also their can reduce the annual energy consumption of Sangak, Barbari and Taftun bakeries about 58%, 66% and 82%, respectively.

کلیدواژه‌ها [English]

  • Experimental study
  • Flatbread
  • Energy
  • Exergy
  • Reducing fuel consumption
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