Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 27, No. 8 (August 2014) 1259-1268   

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  EXERGY AND ENERGY ANALYSIS OF DIESEL ENGINE USING KARANJA METHYL ESTER UNDER VARYING COMPRESSION RATIO
 
M. K. Rath, S. K. Acharya, P. P. Patnnaik and S. Roy
 
( Received: October 26, 2013 – Accepted: April 17, 2014 )
 
 

Abstract    The necessity for decrease in consumption of conventional fuel, related energy and to promote the use of renewable sources such as biofuels, demands for the effective evaluation of the performance of engines based on laws of thermodynamics. Energy, exergy, entropy generation, mean gas temperature and exhaust gas temperature analysis of CI engine using diesel and karanja methyl ester blends at different compression ratios under full load and for different engine loads at compression ratio 18:1 are done in this paper using experimental data. Exergy efficiency, mean gas temperature, brake thermal efficiency increases with increase in compression ratio as well as load. Exhaust gas temperature, destruction of exergy and entropy generation decreases with increase in compression ratio and increases with increase in load for all blends of fuel.

 

Keywords    Karanja methyl ester, Exergy, Biofuels, Variable compression ratio, Diesel engine, Energy

 

چکیده    در مطالعه حاضر، نیاز به کاهش مصرف سوخت رایج و سوخت های فسیلی وابسته به آن است. بنابراین، برای بهبود استفاده از منابع تجدیدپذیر از قبیل سوخت های زیستی نیاز به تخمین موثر از عملکرد موتورها بر پایه قانون دوم ترمودینامیک می باشد. در این مقاله، تحلیل انرژی، اکسرژی، دمای متوسط گاز و دمای گاز خروجی موتور احتراق تراکمی (CI) با استفاده از مخلوط متیل استر کارانجا و دیزل انجام شده است. نتایج در نسبت های مختلف تحت بارگذاری کامل و در بارگذاری های مختلف موتور در نسبت 18:1 محاسبه شده است. مشاهده شد که بازده اکسرژی، دمای گاز متوسط، بازده ترمز حرارتی با افزایش در نسبت تراکم همانند بارگذاری افزایش می یابد. دمای گاز خروجی و تخریب اکسرژی برای همه مخلوط های سوخت با افزایش در نسبت تراکم کاهش و با افزایش در بارگذاری افزایش می یابد.

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