Dizel Motorlarda Performans ve Egzoz Emisyonlarının n-hexadecane Katkı Maddesi ile İyileştirilmesi

Öz

Yakıtların fiziksel ve kimyasal özellikleri; motor performansı ve emisyonları önemli ölçüde etkilemektedir. Yakıt kalitesini arttırmak, daha iyi yanma ve emisyonları azaltmak için yakıt içerisine çeşitli katkı maddeleri ilave edilmektedir. Bu katkı maddeleri hidrokarbonların daha iyi yanması için katalitik bir etki oluşturur. Bu çalışmada, dizel yakıtına ilave edilen n-hexadecane katkı maddesi değişen yakıt özelliklerinin motor performansı ve egzoz emisyonları üzerine etkisi incelenmiştir. Deneyler sonucunda n-hexadecane ilave edilen yakıtların viskozitesi azalırken setan sayısı artmaktadır. Yakıt özelliklerinde ki bu iyileşme, yakıtın silindir içerisine püskürtüldüğünde daha iyi atomize olmasına ve yanma kalitesinin artmasına neden olmaktadır. Deneyler sonucun da en iyi iyileşme %16 n-hexadecane (DHD16) oranında elde edilmiştir. 2800 1/min’de dizel yakıtına göre (D0) güç %1.06 artarken, özgül yakıt tüketimi %2.38 azalmaktadır. Karbon monoksit (CO) emisyonu %10.24, hidrokarbon (HC) emisyonu %19.31, is emisyonu %19.96 azalmaktadır. Yanma kalitesinin iyileşmesi ısı yayılımının yükselmesine sebep olurken azot oksit (NO_x) emisyonu %6.66 arttırmıştır.  Setan sayısındaki artışa bağlı olarak maksimum silindir basıncı artmış tutuşma gecikmesi azalmıştır.

Anahtar Kelimeler

• n-hexadecane,yakıt katkıları,egzoz emisyonları,dizel motorlar,motor performansı

Improvement of Performance and Exhaust Emissions in Diesel Engines by Addition of n-hexadecane Material

Öz

Physical and chemical properties of fuels significantly affect engine performance and emissions. Various additives are added to the fuel to improve fuel quality, better combustion and reduce emissions. These additives create a catalytic effect for better combustion of hydrocarbons. In this study, the effect of varying fuel properties on engine performance and exhaust emissions of n-hexadecane additive added to diesel fuel was investigated. As a result of the experiments, while the viscosity of n-hexadecane added fuels decreased, the cetane number increased. This improvement in fuel properties leads to better atomization and increased combustion quality when fuel is injected into the fuel cylinder. As a result, the best improvement was obtained at 16% n-hexadecane (DHD16) ratio. At 2800 1/min, the power increases by 1.06% compared to diesel fuel (D0) while the brake specific fuel consumption decreases by 2.38%. Carbon monoxide (CO) emission decreases by 10.24%, hydrocarbon (HC) emission decreases by 19.31% and smoke emission decreases by 19.96%. Improvement of combustion quality caused increase of heat emission while nitrogen oxide (NOx) increased the emission by 6.66%. Due to the increase in cetane number, the maximum cylinder pressure increased and the ignition delay decreased.

Anahtar Kelimeler

• n-hexadecane,fuel additives,exhaust emissions,diesel engines,engine performance

Kaynakça

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