Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 30, No. 8 (August 2017) 1205-1214   

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  STUDIES ON EFFECT OF INJECTION TIMING OF GRAPHENE NANOPARTICLES BLENDED SIMAROUBA BIODIESEL BLEND ON CI ENGINE
 
Paramashivaiah. B. M and Rajashekhar. C. R
 
( Received: March 20, 2017 – Accepted in Revised Form: July 07, 2017 )
 
 

Abstract    Graphene is a monolayer carbon atoms discovered in the recent past which has inspired researchers in a wide range of applications. It has a surface area as high as 2630 m2/g and thermal conductivity value of 3000 W/mK-1 at room temperature. It is chemically the most reactive form of carbon with one carbon atom exposed to reaction from each side. Stable dispersion of graphene was achieved using sodium dodecyl sulfate surfactant. Graphene nanofuel was prepared by dispersing of graphene in simarouba methyl ester blend with diesel. The dispersion was characterized using the ultra violet visible spectrometry. The performance, combustion and emission characteristics were studied on a single cylinder, water cooled, direct injection, four stroke computerized diesel engine test rig. The characteristics were studied for three different dosing levels of graphene nanoparticle and three different fuel injection timings. It resulted in improved brake thermal efficiency, reduced unburnt hydrocarbon and carbon monoxide emission. The addition of graphene nanoparticles and advancing the injection timing has resulted in a significant reduction in the combustion duration and a marginal increase in the peak cylinder pressure at all operational loads.

 

Keywords    Graphene; Nano particles; Surfactants; Simarouba; Biodiesel; Nano fuels; Injection Timing

 

چکیده    گرافن یک اتم کربن تک­لایه­ای است که اخیراً پیدا شده است و محققان را در طیف وسیعی از کاربردهای الهام داده است. سطح ویژه­ی این ماده تا 2630 مترمربع بر گرم و مقدار رسانایی حرارتی آن mK-1/3000 وات در دمای اتاق است. از لحاظ شیمیایی، واکنش­پذیرترین شکل کربن با یک اتم کربن در معرض واکنش از هر طرف است. پراکندگی پایدار گرافن با استفاده از سورفکتانت سدیم داودسیل سولفات به دست آمد. گرافن به وسیله­ی پراکندگی گرافن در مخلوط مایع متیل استر سیماروبا با دیزل تهیه شد. پراکندگی با استفاده از اسپکترومتری فرابنفش مریی مشخص شد. عملکرد، احتراق و ویژگی های انتشار بر روی موتور دیزل کامپیوتری آزمایشگاهی تک سیلندر تزریق مستقیم چهار مرحله­ای سردشده با آب مورد مطالعه قرار گرفت. خصوصیات برای سه سطح مختلف مقادیر نانوذرات گرافن و سه زمان تزریق تزریق سوخت بررسی شد. این باعث بهبود بازده حرارتی و کاهش هیدروکربن­هاینسوخته و انتشار گاز مونوکسید کربن می شود. اضافه شدن نانو ذرات گرافنی و پیش­گیری از زمان تزریق موجب کاهش قابل توجهی در مدت احتراق و افزایش حاشیه­ای در فشار کلی سیلندر در تمام بارهای عملیاتی شده است.

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