Camellia sinensis Yağı Metil Esterinin Farklı Yakıt Enjeksiyon Basınçları Altında Motor Performansı ve Egzoz Emisyonları Üzerindeki Etkisi

Abstract

Bu çalışmada, Camellia sinensis tohumlarından elde edilen yağ transesterifikasyon işlemine tabi tutularak Camellia sinensis yağı metil esteri (CSOME) üretilmiştir. Test yakıtları, CSOME’nin konvansiyonel dizel yakıtı ile hacimsel olarak karıştırılmasıyla hazırlanmış olup, Tablo 1’de sunulmuştur. Deneysel süreçte motor tam yük koşullarında her bir yakıt türü ile çalıştırılmış ve 175–200 kg/cm² aralığındaki enjektör basınçlarında tork, güç çıkışı, özgül yakıt tüketimi ve egzoz emisyonları gibi temel performans parametreleri değerlendirilmiştir. Elde edilen sonuçlara göre, B50D50, B20D80 ve B100 yakıt karışımlarında karbon monoksit (CO) emisyonlarının saf dizel (D100) yakıtına kıyasla daha düşük olduğu belirlenmiştir. Buna karşılık, bu karışımlarda yanmamış hidrokarbon (HC) emisyonlarının D100’e göre daha yüksek olduğu gözlemlenmiştir. Karbondioksit (CO₂) emisyonları B50D50, B20D80 ve B100 yakıtlarında artış gösterirken, egzoz gazındaki oksijen (O₂) konsantrasyonunun D100’e kıyasla azaldığı tespit edilmiştir. Ayrıca, azot oksit (NOₓ) emisyonlarının biyodizel içeren tüm karışımlarda saf dizel yakıtına göre daha yüksek olduğu belirlenmiştir. Test edilen yakıtlar arasında en yüksek tork değeri, 200 kg/cm² enjektör basıncında ve 1100 rpm motor devrinde D100 yakıtı ile 54.570 Nm olarak elde edilmiştir. En yüksek güç çıkışı ise aynı enjektör basıncında 1900 rpm’de B20D80 karışımı için 9.556 kW olarak ölçülmüştür. En düşük özgül yakıt tüketimi ise 175 kg/cm² enjektör basıncında ve 1400 rpm motor devrinde B50D50 karışımı için 344.512 g/kWh olarak belirlenmiştir.

Keywords

• Camellia sinensis Yağı Metil Esteri
• Motor Performansı
• Egzoz Emisyonları
• Transesterifikasyon

Effect Of Camellia Sinensis Oil Methyl Ester on Engine Performance and Exhaust Emissions Under Varied Fuel Injection Pressures

Abstract

Oil obtained from Camellia sinensis seeds was transesterified to produce Camellia sinensis oil methyl ester (CSOME). The experimental fuels were prepared by volumetrically blending CSOME with conventional diesel fuel, as presented in Table 1. During the experiments, the test engine was operated under full-load conditions using each fuel type, and the engine performance parameters, including torque, brake power, specific fuel consumption, and exhaust emission characteristics, were evaluated at injector pressures ranging from 175 to 200 kg/cm². The experimental results demonstrated that carbon monoxide (CO) emissions of the B50D50, B20D80, and B100 fuel blends were lower than those of neat diesel fuel (D100). In contrast, unburned hydrocarbon (HC) emissions were higher for the biodiesel-containing blends compared with D100. Carbon dioxide (CO₂) emissions increased for the B50D50, B20D80, and B100 blends, whereas oxygen (O₂) concentrations in the exhaust gases decreased relative to diesel fuel. Furthermore, nitrogen oxides (NOₓ) emissions were found to be higher for all biodiesel blends than for pure diesel fuel. Among the tested fuels, the maximum torque value of 54.570 Nm was obtained with D100 at an injector pressure of 200 kg/cm² and an engine speed of 1100 rpm. The highest brake power output, 9.556 kW, was achieved using the B20D80 blend at 1900 rpm under the same injector pressure condition. In addition, the minimum specific fuel consumption was recorded as 344.512 g/kWh for the B50D50 blend at 1400 rpm and an injector pressure of 175 kg/cm².

Keywords

• Camellia Sinensis oil methyl ester
• Engine performance
• Exhaust emissions
• Transesterification

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