THERMAL SCIENCE

International Scientific Journal

Mario Sremec

,

Mladen Božić

,

Ante Vučetić

,

Darko Kozarac

INFLUENCE OF HIGH COMPRESSION RATIO AND EXCESS AIR RATIO ON PERFORMANCE AND EMISSIONS OF NATURAL GAS FUELLED SPARK IGNITION ENGINE

ABSTRACT
Compressed natural gas is in automotive industry recognized as one of the “cleanest” fossil fuels which can be used in internal combustion engines with a number of benefits. Since natural gas has much higher octane rating than gasoline it is expected that higher compression ratios can be used. The goal of the research is to determine the change of performance of spark ignited engine with the increase of compression ratio to values similar to compression ignited engine while keeping the exhaust emissions on the acceptable level and avoiding knock combustion. Measurements are performed at compression ratios 12, 16, and 18 at three different values of air excess ratio. Methane with known composition from a pressure cylinder is used instead of natural gas and the results are comprised of indicating results (in-cylinder and intake pressure in a crank angle space), emissions, temperatures, and mass-flows on various intake and exhaust positions. Analysis of results shows high influence of compression ratio and excess air ratio on combustion, performance, and exhaust gas emissions.
KEYWORDS
methane, spark ignition engine, compression ratio, natural gas, compressed natural gas
PAPER SUBMITTED: 2017-12-22
PAPER REVISED: 2018-02-28
PAPER ACCEPTED: 2018-03-01
PUBLISHED ONLINE: 2018-09-23
DOI REFERENCE: https://doi.org/10.2298/TSCI171222219S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 5, PAGES [2013 - 2024]
REFERENCES
  1. Taritaš, I., et al., The Effect of Operating Parameters on Dual Fuel Engine Performance and Emissions - An Overview, Trans FAMENA, 41 (2017), 1, pp 1-14
  2. Khan, M. I., et al., Technical Overview of Compressed Natural Gas (CNG) as a Transportation Fuel, Renew. Sustain. Energy Rev., 51 (2015), Nov., pp. 785-797
  3. Serrano, D., Bertrand, L., Exploring the Potential of Dual Fuel Diesel-CNG Combustion for Passenger Car Engine, Proceedings, FISITA 2012 World Congress, Beijing, China, 2012
  4. Tahir, M. M., et al., Performance Analysis of a Spark Ignition Engine Using Compressed Natural Gas (CNG) as Fuel, Energy Procedia, 68 (2015), Apr., pp 355-362
  5. Aslam, M. U., et al., An Experimental Investigation of CNG as an Alternative Fuel for a Retrofitted Gasoline Vehicle, Fuel, 85 (2006), 5, pp. 717-724
  6. Jahirul, M. I., et al., Comparative Engine Performance and Emission Analysis of CNG and Gasoline in a Retrofitted Car Engine, Appl. Therm. Eng., 30 (2010), 14, pp. 2219-2226
  7. Cho, H. M., He, B.-Q., Spark Ignition Natural Gas Engines ‒ A Review, Energy Convers. Manag., 48 (2007), 2, pp. 608-618
  8. Korakianitis, T., et al., Natural-gas Fueled Spark-ignition (SI) and Compression-ignition (CI) Engine Performance and Emissions, Prog. Energy Combust. Sci., 37 (2011), 1, pp. 89-112
  9. Raju, A. V. S. R., et al., Experimental Investigations on a Lean Burn Natural Gas Fuelled si Engine at Different Compression Ratios, J. Inst. Eng. Mech. Eng. Div., 80 (2000), 4, pp. 144-147
  10. Zhang, Q., et al., Combustion and Emissions of a Euro VI Heavy-duty Natural Gas Engine Using EGR and TWC, J. Nat. Gas. Sci. Eng., 28 (2016), Jan., pp. 660-671
  11. Zoldak, P., Naber, J., Spark Ignited Direct Injection Natural Gas Combustion in a Heavy Duty Single Cylinder Test Engine ‒ Start of Injection and Spark Timing Effects, SAE Technical Paper, 2015-01-2813, 2015
  12. Zoldak, P., Naber, J., Spark Ignited Direct Injection Natural Gas Combustion in a Heavy Duty Single Cylinder Test Engine ‒ AFR and EGR Dilution Effects, SAE Technical Paper, 2015-01-2808, 2015
  13. Lim, G., et al., Effects of Compression Ratio on Performance and Emission Characteristics of Heavy-duty SI Engine Fuelled with HCNG, Int. J. Hydrogen Energy, 38 (2013), 11, pp. 4831-4838
  14. Takagaki, S., Raine, R., The Effects of Compression Ratio on Nitric Oxide and Hydrocarbon Emissions from a Spark-Ignition Natural Gas Fuelled Engine, SAE Technical Paper, 970506, 1997
  15. Asar, G. M. M., et al., Study of Natural Gas in an Air-Cooled Spark Ignition Engine, SAE Technical Paper, 1997-10-972113, 1997, pp. 291-296
  16. ***, Hatz Diesel, www.hatz-diesel.com/en/products/diesel-engines/d-series/1d81/
  17. Zhu, G., et al., MBT Timing Detection and its Closed-loop Control Using In-cylinder Pressure Signal, SAE Technical Paper, 2003-01-3266, 2003
  18. Vuilleumier, D., et al., Intermediate Temperature Heat Release in an HCCI Engine Fueled by Ethanol/n-heptane Mixtures: An Experimental and Modeling Study, Combust. Flame., 161 (2013), 3, pp. 680-695
  19. ***, Delphi Technologies, delphi.com/docs/default-source/worldwide-emissions-standards/2016-2017-heavy-duty-amp-off-highway-vehicles.pdf?status=Temp&sfvrsn=0.03636262961639791
  20. Sremec, M., et al., Numerical Investigation of Injection Timing and Knock on Dual Fuel Engine, Proceedings, 2nd SEE SDEWES Conference, Piran, Slovenia, 2016.
  21. Eswara, A. K., et al., Introduction to Natural Gas: A Comparative Study of its Storage, Fuel Costs and Emissions for a Harbor Tug, Conference Paper, Annual Meeting of Society of Naval Architects & Marine Engineers (SNAME), Bellevue, Washington, United States of America, 2013
  22. ***, Nett Technologies Inc., www.nettinc.com/information/emissions-faq/how-does-an-oxidation-catalyst-work
  23. Basshuysen, R., Schäfer, F., Internal Combustion Engine Handbook, SAE International, Warendale, Pennsylvania, United States of America, 2004
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Influence of high compression ratio and excess air ratio on performance and emissions of natural gas fuelled spark ignition engine

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence