بررسی آزمایشگاهی اثر سوخت (HHO_CNG) بر عملکرد موتور پایه بنزین سوز

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه آموزشی مکانیک، دانشکده فنی، دانشگاه ارومیه، ایران

2 دانشجوی دکتری مکانیک گرایش تبدیل انرژی دانشگاه ارومیه

چکیده

در موتورهای پیستونی با افزایش دور موتور مدت زمان سیکل احتراق کاهش می­ یابد. با کاهش زمان سیکل احتراق موتور فرصت برای احتراق کامل سوخت کم می ­شود. درنتیجه، به­ منظور تکمیل احتراق سوخت در دورهای بالای موتور، شمع باید زودتر جرقه بزند. حال، با توجه به اینکه سرعت شعله گاز طبیعی نسبت­به بنزین کمتر است، این مشکل محسوس ­تر می ­شود. در­نتیجه مقدار پیش ­انداختن زمان جرقه شمع موتور، در­حالت گاز­سوز، نسبت­به حالتی که بنزین  می­ سوزاند، باید بیشتر افزایش یابد. این کار منجربه افزایش کار منفی در مرحله تراکم می­شود که سبب کاهش بازدهی چرخه می ­شود. محققان برای بهبود احتراق گاز طبیعی پیشنهاد اضافه­ کردن هیدروژن را داده ­اند(HCNG) . با اضافه­ کردن هیدروژن خواص شعله­ وری گاز طبیعی بهبود می­ یابد. در این پژوهش، با استفاده از هیدروراکتور، گاز هیدروژن و اکسیژن (HHO) به روش الکترولیز از آب تولید و مصرف می ­شود. گاز HHO تولیدشده به­ همراه گاز  CNGبا هوای ورودی به موتور ترکیب می ­شود. سپس، تاثیر گاز  HHO-CNGبر پارامترهای بازدهی، توان و آلودگی بررسی شده است. نتایج به­ دست­ آمده نشان می دهد که با اضافه­شدن HHO بازده حرارتی افزایش می ­یابد. در این شرایط، میزان CO و UHC کاهش داشته است. این کاهش آلودگی و افزایش بازده به ­علت کاهش نیاز به آوانس جرقه شمع و احتراق کامل سوخت است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Investigation of Fuel Effects (HHO_CNG) on Gasoline-Based Engine Performance

نویسندگان [English]

  • samad jafarmadar 1
  • poria majidi 2
1 Department of Mechanics, Faculty of Engineering, Urmia University, Iran
2 Student of Mechanical Engineering, Urmia University, iran
چکیده [English]

In piston engines, as the engine speed increases, the combustion cycle time decreases. Reducing the engine combustion cycle time, the opportunity for complete fuel combustion is reduced. As a result, in order to complete the fuel combustion, at high engine speeds, the spark plug must ignite sooner. Now that the natural gas flame is slower than gasoline, this problem is becoming more noticeable. As a result, the spark ignition timing should be increased further in CNG fuel mode than in the case of gasoline combustion. This leads to an increase in negative work during the compression phase, resulting in reduced cycle efficiency. Researchers have suggested adding hydrogen to improve natural gas combustion (HCNG). By adding hydrogen, the flammability properties of natural gas are improved. In this study, using Hydrogen generator, hydrogen and oxygen (HHO) gas is produced and consumed water by electrolysis method. The gas (HHO) produced together with the gas (CNG) is combined with the air entering the engine. Then the effect of gas (HHO-CNG) on the parameters of efficiency, power and pollution has been investigated. The results show that the thermal efficiency increases with the addition of HHO. Under these conditions, CO and UHC levels have decreased. This reduces contamination and increases efficiency due to reduced need for spark plug advance and complete fuel combustion.

کلیدواژه‌ها [English]

  • CNG
  • HHO
  • compression
  • Engine
  • Contamination
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