SavedAdd your journal

Journals / Isı Bilimi ve Tekniği Dergisi / 2017 / Cilt: 37 - Sayı: 2 (40. Yıl Özel Baskı)

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

FARKLI EGZOZ VALF YÜKSEKLİKLERİ İÇİN BİR SI-CAI MOTORDA METANHİDROJEN KARIŞIMLARININ İNCELENMESİ

Bilge ALBAYRAK ÇEPER
Emin BORLU
Pages
129–138
Publication Date
2022-10-18
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

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

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

📌 3 Key Takeaways

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

Abstract

Abstract: In this study, a spark-assisted controlled auto-ignition (SI-CAI) engine with different Methane-Hydrogenblends was numerically and experimentally investigated under different excess air ratio and valve lift valueconditions. Experimental results were used to validate the numerical study. GT-Power simulation tool was used forthe numerical studies. The valve lifts were created ranging from 3.0 to 5.0 mm with 0.5 increments. The excess airratio () values were considered as 1.0, 1.1, 1.2, 1.3 and 1.4. Besides, Methane-Hydrogen blends were constituted as100% 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 thevalve lift increases. The pressure and temperature values tend to reduce with the increasing of  values. Increasing thevolume fraction of Hydrogen in Methane–Hydrogen blend contributes to pressure development earlier. As aconclusion increasing of the volume fraction of Hydrogen in the Methane-Hydrogen blend causes a reduction in theindicated thermal efficiency and mean effective pressure, and a lower specific fuel consumption.

Özet

Bu çalışmada, farklı metan-hidrojen karışımlarının buji ateşlemeli kontrollü kendi kendine tutuşmalı bir motorda (SI-CAI) farklı hava fazlalık katsayısı ve valf yükseklik değerlerinde sayısal ve deneysel inceleme yapılmıştır. Deneysel sonuçlar sayısal çalışmanın doğruluğu için kullanılmıştır. Sayısal çalışma için GT-Power simülasyon programı kullanılmıştır. Valf yükseklikleri 0.5 mm artış değeri ile 3.0-5.0 mm arasında ele alınmıştır. Hava fazlalık katsayısı () değerleri 1.0, 1.1, 1.2, 1.3 ve 1,4 olarak dikkate alınmıştır. Bununla birlikte, metanhidrojen karışımları hacimsel olarak %100 Metan (100M), %90 Metan-%10 Hidrojen (90M10H), %80 Metan-%20 Hidrojen (80M20H) ve %70 Metan-%30 Hidrojen (70M30H) olacak şekilde incelenmiştir. Sonuçlar valf yüksekliklerinin artması ile maksimum basınç değerlerinin arttığını göstermiştir. Hava fazlalık katsayısının artması ile basınç ve sıcaklık değerlerinde azalma eğilimi görülmüştür. Metan-hidrojen karışımlarında hidrojenin hacimsel oranının artırılması ile basınç gelişimlerinin erken gerçekleştiği görülmüştür. Sonuç olarak, metan hidrojen karışımlarındaki hidrojenin hacimsel oranının artışı indike ısıl verimde ve ortalama efektif basınçta azalmaya ve daha düşük özgül yakıt tüketimine neden olmuştur

🔖

Cite This Article

ÇEPER, B. A., BORLU, E. (2022). 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 (40. Yıl Özel Baskı), 129–138. https://ajindex.com/articles/542477

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (10)

  1. Zhang C.，Pan J.，Tong J.，Li J., 2011, Effects of Intake Temperature and Excessive Air Coefficient on Combustion Characteristics and Emissions of HCCI Combustion, Procedia Environmental Sciences, 11:1119-1127.
  2. Zhang C, Wu H., 2012, The simulation based on Chemkin for homogeneous charge compression ignition combustion with on-board fuel reformation in the chamber. Int J Hydrogen Energy, 37, 4467-75.
  3. Yildiz M., Akansu S.O., Albayrak Çeper B., 2015, Computational Study of EGR and Excess Air Ratio Effects on a Methane Fueled CAI Engine, International Journal of Automotive Engineering and Technologies, vol.4, 152-161.
  4. Yeom K, Jang J, Bae C., 2007, Homogeneous charge compression ignition of LPG and gasoline using variable valve timing in an engine. Fuel, 86, 494-03.
  5. Yao M, Zheng Z, Liu H., 2009, Progress and recent trends in homogeneous charge compression. Progress in Energy and Combustion Science, 35, 398-437.
  6. Syed Y., Venkateswarlu K. and Khan N., 2012, Effect of Ignition Timing and Equivalence Ratio on the Performance of an Engine Running at Various Speeds Fuelled with Gasoline and Natural Gas, International Journal of Advanced Science and Technology Vol. 43, June. Stone R., 1999, Introduction to Internal Combustion Engines, Third Edition.
  7. Society of Automotive Engineers Inc., Warrendale, 641 pp. Naeve N, He YT, Deng J., 2011, Waste coke oven gas used as a potential fuel for engines, SAE Technical Paper; SAE 2011-01-0920. Moreno1 F., Muñoz M., Magén O., Monné C., Arroyo J., 2010, Modifications of a spark ignition engine to operate with Hydrogen and Methane blends, International Conference on Renewable Energies and Power Quality (ICREPQ’10) Granada (Spain), 23th to 25th March. Mahrous A.F.M, Potrzebowski A, Wyszynski M.L, Xu H.M, Tsolakis A, Luszcz P., 2009, A modeling study into effects of variable valve timing on the gas exchange process and performance of a 4-valve DI homogeneous charge compression ignition (HCCI) engine. Energy Conversion and Management, 50, 393-98.
  8. Lee K, Kim Y, Byun C, Lee J., 2013, Feasibility of compression ignition for Hydrogen fueled engine with neat Hydrogen-air pre-mixture by using high compression. Int J Hydrogen Energy, 38, 255-64.
  9. Lee C.H, Lee K.H., 2007, An experimental study of the combustion characteristics in SCCI and CAI based on direct-injection gasoline engine. Experimental Thermal and Fluid Science, 31, 1121-32.
  10. Knop V, Francqueville L, Duffour F, Vangraefschèpe, F., 2009, Influence of the valve-lift strategy in a CAI engi