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Journals / Isı Bilimi ve Tekniği Dergisi / 2017 / Cilt: 37 - Sayı: 2

INVESTIGATION OF AN SI-CAI ENGINE FUELLED WITH METHANE-HYDROGEN MIXTURES FOR DIFFERENT EXHAUST VALVE LIFTS

Bilge ÇEPER
Emin BORLU
Pages
129–138
Publication Date
2017-10-31
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a conclusion increasing of the volume fraction of Hydrogen in the Methane-Hydrogen blend causes a reduction in the indicated thermal efficiency and mean effective pressure, and a lower specific fuel consumption.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, a spark-assisted controlled auto-ignition (SI-CAI) engine with different Methane-Hydrogen blends was numerically and experimentally investigated under different excess air ratio and valve lift value conditions.
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Key Findings & Data:The valve lifts were created ranging from 3.0 to 5.0 mm with 0.5 increments.
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Conclusion & Impact:As a conclusion increasing of the volume fraction of Hydrogen in the Methane-Hydrogen blend causes a reduction in the indicated thermal efficiency and mean effective pressure, and a lower specific fuel consumption.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Methane-Hydrogen blends · GT-Power

Özet

In this study, a spark-assisted controlled auto-ignition (SI-CAI) engine with different Methane-Hydrogen blends was numerically and experimentally investigated under different excess air ratio and valve lift value conditions. Experimental results were used to validate the numerical study. GT-Power simulation tool was used for the numerical studies. The valve lifts were created ranging from 3.0 to 5.0 mm with 0.5 increments. The excess air ratio () values were considered as 1.0, 1.1, 1.2, 1.3 and 1.4. Besides, Methane-Hydrogen blends were constituted as 100% Methane (100M), 90% Methane-10% Hydrogen (90M10H), 80% Methane-20% Hydrogen (80M20H) and 70% Methane-30% Hydrogen (70M30H) by volume. Results revealed that the peak pressure values increase when the valve lift increases. The pressure and temperature values tend to reduce with the increasing of  values. Increasing the volume fraction of Hydrogen in Methane–Hydrogen blend contributes to pressure development earlier. As a conclusion increasing of the volume fraction of Hydrogen in the Methane-Hydrogen blend causes a reduction in the indicated thermal efficiency and mean effective pressure, and a lower specific fuel consumption.

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Cite This Article

ÇEPER, B., BORLU, E. (2017). INVESTIGATION OF AN SI-CAI ENGINE FUELLED WITH METHANE-HYDROGEN MIXTURES FOR DIFFERENT EXHAUST VALVE LIFTS. Isı Bilimi ve Tekniği Dergisi, Cilt: 37 - Sayı: 2, 129–138. https://ajindex.com/articles/133240

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