تاثیر اتانول به عنوان افزودنی سوخت بیودیزل در عملکرد و آلایندگی موتور دیزل دوگانه سوز

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه بیوسیستم، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشگاه محقق اردبیلی

چکیده

بررسی اثرات سوخت پایلوت حاوی درصدهای پایین اتانول و آب در مخلوط سوخت دیزل-بیودیزل در یک فرایند احتراق دوگانه‌سوز با گاز طبیعی می‌تواند نتایج مطلوبی بر عملکرد و آلایندگی یک موتور دیزل داشته باشد. در پژوهش حاضر، سه سطح اتانول (0، 2 و 4 درصد)، دو سطح بیودیزل (0 و 5 درصد) و چهار سطح آب (0، 3/0، 6/0و 9/0 درصد) با سوخت دیزل مخلوط شدند. تمام نمونه سوخت‌ها به عنوان سوخت پایلوت در فرایند احتراق دوسوخته با درصد جایگزینی گاز طبیعی 80 درصد در نظر گرفته شدند. بر اساس نتایج، حضور آب، اتانول و تلفیق آب-اتانول در کنار گاز طبیعی می­تواند علاوه بر کاهش آلاینده‌ها، با افزایش فشار درون محفظه احتراق، عملکرد موتور دیزل را به طور نسبی بهبود بخشد. حضور محتوای اکسیژن در اتانول می‌تواند موجب بهبود روند احتراق با سوق دادن احتراق به سمت احتراق کامل انجام گیرد. نتایج بهینه سازی با روش سطح پاسخ نشان داد، نقطه بهینه عملکرد موتور در بار کامل با نمونه سوخت حاوی بیودیزل به مقدار 5/2 میلی لیتر، اتانول به مقدار 5/11 میلی‌لیتر، آب به میزان 3/9 میلی‌لیتر و سوخت گازی به میزان 65 درصد رخ می‌دهد. در این شرایط، در مقایسه با نمونه شاهد، توان ترمزی در حدود 79 درصد افزایش یافت، و مصرف سوخت ویژه در حدود 58 درصد کاهش یافت. این نمونه سوخت مقادیر مونوکسیدکربن، دی اکسیدکربن، اکسیدهای نیتروژن و هزینه تولید انرژی را به ترتیب حدود 54، 33، 29، و 39 درصد کاهش و اکسیدهای گوگرد را حدود 11 درصد افزایش داد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The effect of ethanol as a biodiesel fuel additive on the performance and emissions of a dual-fuel diesel engine

نویسندگان [English]

  • Sina Faizollahzadeh Ardabili 1
  • بهمن نجفی 2
  • Amir Hasheminejhad 2
1 Department of Biosystem engineering, university of Mohaghegh Ardabili, Ardabil, Iran
2 University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Investigating the effects of pilot fuel containing low percentages of ethanol and water in the diesel-biodiesel fuel mixture in a dual-fuel combustion process with natural gas can have favorable results on the performance and emissions of a diesel engine. In the present study, three levels of ethanol (0, 2, and 4%), two levels of biodiesel (0 and 5%), and four levels of water (0, 0.3, 0.6, and 0.9%) were mixed with diesel fuel. All these fuel samples were considered as pilot fuel in the dual fuel combustion process with an 80% natural gas replacement percentage. Based on the obtained results, the presence of water, ethanol, and the combination of water-ethanol and natural gas can improve the diesel engine's performance by increasing the combustion chamber pressure and reducing the pollutants. The presence of oxygen content in ethanol can improve the combustion process by pushing the combustion toward complete combustion. The results of the optimization using the response surface method showed that the optimal point of engine performance at full load with a fuel sample containing biodiesel in the amount of 2.5 ml, ethanol in the amount of 11.5 ml, water in the amount of 9.3 ml and gas fuel occurs in 65%. Under this condition, compared to the control sample, the braking power increased by about 79%, and the specific fuel consumption decreased by about 58%. This fuel sample reduced the amounts of carbon monoxide, carbon dioxide, nitrogen oxides, and energy production costs by 54, 33, 29, and 39%, respectively, and increased sulfur oxides by 11%.
 

کلیدواژه‌ها [English]

  • Dual fuel diesel engine
  • Diesel fuel
  • Water
  • Ethanol
  • Natural gas
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