Dizel-Biyogaz çift yakıtla çalışan bir motorda dizel yakıt miktarının emisyonlara etkisi

Yıl 2020, Cilt: 26 Sayı: 4, 683 - 688, 20.08.2020

İlker Turgut Yılmaz Mustafa Yavuz Metin Gümüş

Öz

İçten yanmalı motorların enerji ihtiyaçları genellikle fosil yakıtlardan karşılanmaktadır. Fosil yakıtların gün geçtikçe tükenmelerine bağlı olarak yenilenebilir enerji kaynakları araştırmacıların ilgisini çekmektedir. Biyogaz organik atıklardan üretilen alternatif bir yakıttır. Bu çalışmada dizel-biyogaz çift yakıtlı bir motorda dizel yakıt miktarının egzoz emisyonlarına etkisi incelenmiştir. Deneyler 1.6 l dört zamanlı, su soğutmalı, aşırı doldurmalı, ortak hatlı yakıt püskürtme sistemine sahip dört silindirli bir dizel motorda gerçekleştirilmiştir. Motorun elektronik kontrol ünitesinin orijinal ayarlarında herhangi bir değişiklik yapılmamıştır. Çift yakıtlı çalışmalarda motorun enerji ihtiyacının %20’si, %30’u, %40’ı ve %50’si dizel yakıt ile karşılanmıştır. Deneylerde motor momenti 40 Nm, 60 Nm ve 80 Nm arasında değiştirilmiş ve motor devri 1750 d/d’da sabit tutulmuştur. HC, CO2 ve NOx emisyonları dizel yakıt miktarının artışına bağlı olarak azalırken is emisyonu artmıştır. Silindire gönderilen biyogaz miktarının artması hem ön karışımlı yanma fazında yanan yakıt miktarını hem de NOx emisyonlarını arttırmıştır. Biyogazın içeriğinde bulunan CO2 ise yakıt hava karışımını seyrelterek HC ve is emisyonlarını yükseltmiştir.

Anahtar Kelimeler

Biyogaz, Çift yakıt, Egzoz emisyonları

Kaynakça

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