Metanol Benzin Karışımlarının Bir Benzin Motorunun Performans ve Emisyonları Üzerine Etkisi

Buji ateşlemeli motorlardan salınan kirletici emisyonların azaltılması için kullanılan yöntemlerden biri de motorlarda alternatif yakıt kullanılmasıdır. Alternatif yakıt olarak metanol,belli oranlara kadar yakıt içerine katılarak motorda herhangi bir yapısal değişiklik yapılmadan kullanılabilmektedir. Bu çalışmada, buji ateşlemeli motorlarda farklı oranlarda benzin metanol karışımlarının yakıt olarak kullanılmasının performans ve egzoz emisyonlarına etkileri deneysel olarak araştırılmıştır. Deneylerde benzin yakıtına kütlesel olarak%10 ve %20 oranlarında metanol karıştırılmıştır. Çalışma farklı motor devirlerinde ve tam yük şartlarında gerçekleştirilmiştir. Deneysel çalışma sonucunda, motorda yakıt olarak %20 metanol karışımlı yakıt kullanılması ile motor torku ve ve efektif güçte %3’e varan oranlarda azalmalar tespit edilmiştir. Motor performansındaki az miktardaki kötüleşmeye karşın HC, CO ve NOx emisyonlarında azalmalar saptanmıştır. HC emisyonundaki maksimum azalma miktarı %10 metanol karışımlı yakıtta %17, NOx emisyonlarındaki maksimum azalma miktarı ise %20 metanol karışımlı yakıtta % 26’dır. Özgül yakıt sarfiyatı ve efektif verim değerlerinde bir miktar kötüleşmeler görülmüştür.

Effect of Methanol Gasoline Blends on the Performance and Emissions of a Gasoline Engine

One of the methods used to reduce pollutant emissions from spark ignition engines is the use of alternative fuels in engines. As an alternative fuel, methanol can be used in the engine without making any structural changes by adding it to the fuel up to certain proportions. In this study, the effects of using different ratios of gasoline methanol mixtures as fuel in spark ignition engines on performance and exhaust emissions were investigated experimentally. In the experiments, 10% and 20% by mass of methanol was mixed with gasoline fuel. The experiments were carried out at different engine speeds and full load conditions. As a result of the experimental study, reductions of up to 3% in engine torque and effective power were determined by using 20% methanol blended fuel as fuel in the engine. Despite the slight deterioration in engine performance, reductions in HC, CO and NOx emissions were observed. The maximum reduction in HC emissions is 17% in 10% methanol blended fuel, and the maximum reduction in NOx emissions is 26% in 20% methanol blended fuel. Some deterioration was observed in the specific fuel consumption and effective efficiency values.

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