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4. Analysis of key features
The characteristics calculated from the chromatography of a natural gas fairly representative of an "H"-type gas, are compared with those of an SP95-type gasoline typically distributed in European service stations (table 2 ). Taking into account the characteristics of a "B" type gas, instead of an "H" type gas, would not alter the trends revealed by this comparison with a gasoline.
While there are significant differences between natural gas and commercial gasoline, it's important to point out that natural gas can be used on a "spark-ignition" engine basis, and that adapting the injection system (from tank to injectors) may be the only essential change. To exploit the full potential of natural gas, more far-reaching adaptations are required (compression ratio, timing, ignition system, maps, after-treatment...
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Analysis of key features
Conclusion
Bibliography
Websites
Standards and norms
- Gaz naturel. Désignation de la qualité. - NF EN ISO 13686 - 08-13
- Petroleum products – Determining the anti-knock properties of automotive engine fuels – Search method - NF EN ISO 5164 - 12-05
- Natural gas – Compression factor calculation – Part 3: Calculation based on physical characteristics - NF EN ISO 12213 - 12-09
- Natural gas – Natural gas for use as compressed fuel for vehicles – Part 1: Quality...
Regulations
Renewable Energy Directive 2009/28/EC http://www.eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=Oj:L:2009:140:0016:0062:fr:PDF
Directive 2008/50/EC http://www.europa.eu/legislation_summaries/environment/air_pollution/l28186_fr.htm
...Statistical and economic data
BP Statistical Review of World Energy – june 2013/bp.com/statisticalreview http://www.worldenergyoutlook.org/media/weowebsite/2013/LondonNovember12.pdf
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