Cetane number - Revision history

Jmdonev: 1 revision imported

2018-07-21T01:13:06Z

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Jmdonev at 20:09, 19 July 2018

2018-07-19T20:09:58Z

← Older revision		Revision as of 20:09, 19 July 2018
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	[[Category:Done ~~2015~~-06-01]]		[[Category:Done 2018-07-20]]
	[[File:CETANE.png\|400px\|framed\|right\|Figure 1. Cetane rating seen on fuel pumps.<ref>''Made internally by a member of the Energy Education team''. Adapted from: http://www.gasolineadvertising.com/product/FSD/Pump_OCRatingA.php</ref>]]		[[File:CETANE.png\|400px\|framed\|right\|Figure 1. Cetane rating seen on fuel pumps.<ref>''Made internally by a member of the Energy Education team''. Adapted from: http://www.gasolineadvertising.com/product/FSD/Pump_OCRatingA.php</ref>]]
	<onlyinclude>'''Cetane rating''', also known as '''cetane number''' is a measurement of the quality or performance of [[diesel]] [[fuel]]. The higher the number, the better the fuel [[combustion\|burns]] within the engine of a vehicle. The cetane number is similar to the [[octane rating]] in that it is a rating assigned to a fuel to rate the quality of its combustion. The difference is that octane rating rates [[gasoline]] whereas cetane rates diesel.</onlyinclude><ref name="RE1">Christine & Scott Gable. (May 14, 2015). ''Diesel Fuel Cetane Rating'' [Online]. Available: http://alternativefuels.about.com/od/researchdevelopment/a/cetane.htm</ref> Just as higher performance gasoline vehicles require fuels with a higher octane rating, high performance diesel vehicles require fuel with a higher cetane rating.		<onlyinclude>'''Cetane rating''', also known as '''cetane number''' is a measurement of the quality or performance of [[diesel]] [[fuel]]. The higher the number, the better the fuel [[combustion\|burns]] within the engine of a vehicle. The cetane number is similar to the [[octane rating]] in that it is a rating assigned to a fuel to rate the quality of its combustion. The difference is that octane rating rates [[gasoline]] whereas cetane rates diesel.</onlyinclude><ref name="RE1">Christine & Scott Gable. (May 14, 2015). ''Diesel Fuel Cetane Rating'' [Online]. Available: http://alternativefuels.about.com/od/researchdevelopment/a/cetane.htm</ref> Just as higher performance gasoline vehicles require fuels with a higher octane rating, high performance diesel vehicles require fuel with a higher cetane rating.

	The cetane rating of a specific diesel mixture is based off of how much ~~cetane - a~~ clear, colourless [[hydrocarbon]] that ignites under high [[pressure]]~~s - is~~ in some fuel. Pure cetane represents the highest purity of diesel fuel possible, and thus has a cetane rating of 100.<ref name="RE2">Chip Express. (May 14, 2015). ''Rating Diesel'' [Online]. Available: http://www.chipexpress.com/articles/rating-diesel-understanding-cetane-numbers/</ref>		The cetane rating of a specific diesel mixture is based off of how much cetane—a clear, colourless [[hydrocarbon]] that ignites under high [[pressure]]s—is in some fuel. Pure cetane represents the highest purity of diesel fuel possible, and thus has a cetane rating of 100.<ref name="RE2">Chip Express. (May 14, 2015). ''Rating Diesel'' [Online]. Available: http://www.chipexpress.com/articles/rating-diesel-understanding-cetane-numbers/</ref>

	The main difference between cetane and octane ratings is that the octane rating represents how well a fuel can resist [[octane rating#Pre-Ignition and Knocking\|pre-ignition]] due to ~~compression - ensuring~~ the fuel ignites only from a spark from the [[spark plug]] ~~- whereas the cetane rating does not~~. ~~Instead~~, the cetane number measures the delay in the ignition time of the fuel - the ~~time~~ between when the fuel is injected into the chamber and when the combustion begins ~~- is minimized~~. Unlike gasoline engines which attempt to ~~minimize or erase~~ any ignition due to compression, diesel engines ''rely'' on this compression ignition and thus no spark is involved. A higher cetane number simply means the time between when the fuel is injected into the combustion chamber and when the fuel ignites is minimized ~~- meaning that~~ the fuel ~~ignites~~ due to compression ~~more easily~~. This shorter delay time results in more complete fuel combustion.<ref name="RE1"/>		The main difference between cetane and octane ratings is that the octane rating represents how well a fuel can resist [[octane rating#Pre-Ignition and Knocking\|pre-ignition]] due to compression—ensuring the fuel ignites only from a spark from the [[spark plug]]. However, the cetane number measures the delay in the ignition time of the fuel. In other words, it is how ''minimized'' the delay is between when the fuel is injected into the chamber and when the combustion begins. Unlike gasoline engines which attempt to resist any ignition due to compression, diesel engines ''rely'' on this compression ignition and thus no spark is involved. A higher cetane number simply means the time between when the fuel is injected into the combustion chamber and when the fuel ignites is minimized. This means the fuel has the ability to ignite more easily and readily due to compression. This shorter delay time results in more complete fuel combustion.<ref name="RE1"/>

	For a video explaining this type of ignition in depth, click [https://www.youtube.com/watch?v=WdQ4J-NFoU8 here].		For a video explaining this type of ignition in depth, click [https://www.youtube.com/watch?v=WdQ4J-NFoU8 here].

	==Benefits of a High Cetane Rating==		==Benefits of a High Cetane Rating==
	A higher cetane number resulting in quicker ignition of the fuel leads to less non-ignited fuels building up inside the combustion chamber, as well as more complete fuel combustion. Better fuel combustion and quick ignition leads to quicker starting for vehicles, as well as an engine that operates more quietly as only misted fuel is ignited and buildup inside the engine is minimized. ~~As well~~, fuel [[efficiency]] improves with more complete combustion and harmful emissions are reduced.~~<ref name="RE3">FS Fuel and Lubricants. (May 14, 2015). ''High Cetane Fuel'' [Online]. Available: http://www.gofurtherwithfs.com/Whitepapers/Diesel%20Fuel%20Cetane%20Number.pdf</ref>~~		A higher cetane number resulting in quicker ignition of the fuel leads to less non-ignited fuels building up inside the combustion chamber, as well as more complete fuel combustion. Better fuel combustion and quick ignition leads to quicker starting for vehicles, as well as an engine that operates more quietly as only misted fuel is ignited and buildup inside the engine is minimized. Moreover, fuel [[efficiency]] improves with more complete combustion and harmful [[emissions]] are reduced.

	Generally, the owners manual that comes with new vehicles has manufacturers recommendations as to which cetane rating a vehicle should use to ensure the engine is operating at its peak.		Generally, the owners manual that comes with new vehicles has manufacturers recommendations as to which cetane rating a vehicle should use to ensure the engine is operating at its peak.

			==For Further Reading==
			*[[Diesel engine]]
			*[[Fuel]]
			*[[Fuel efficiency]]
			*[[Combustion]]
			*[[Octane rating]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:30:50Z

1 revision imported

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J.williams at 16:49, 12 August 2015

2015-08-12T16:49:10Z

New page

[[Category:Done 2015-06-01]]
[[File:CETANE.png|400px|framed|right|Figure 1. Cetane rating seen on fuel pumps.<ref>''Made internally by a member of the Energy Education team''. Adapted from: http://www.gasolineadvertising.com/product/FSD/Pump_OCRatingA.php</ref>]]
<onlyinclude>'''Cetane rating''', also known as '''cetane number''' is a measurement of the quality or performance of [[diesel]] [[fuel]]. The higher the number, the better the fuel [[combustion|burns]] within the engine of a vehicle. The cetane number is similar to the [[octane rating]] in that it is a rating assigned to a fuel to rate the quality of its combustion. The difference is that octane rating rates [[gasoline]] whereas cetane rates diesel.</onlyinclude><ref name="RE1">Christine & Scott Gable. (May 14, 2015). ''Diesel Fuel Cetane Rating'' [Online]. Available: http://alternativefuels.about.com/od/researchdevelopment/a/cetane.htm</ref> Just as higher performance gasoline vehicles require fuels with a higher octane rating, high performance diesel vehicles require fuel with a higher cetane rating.

The cetane rating of a specific diesel mixture is based off of how much cetane - a clear, colourless [[hydrocarbon]] that ignites under high [[pressure]]s - is in some fuel. Pure cetane represents the highest purity of diesel fuel possible, and thus has a cetane rating of 100.<ref name="RE2">Chip Express. (May 14, 2015). ''Rating Diesel'' [Online]. Available: http://www.chipexpress.com/articles/rating-diesel-understanding-cetane-numbers/</ref>

The main difference between cetane and octane ratings is that the octane rating represents how well a fuel can resist [[octane rating#Pre-Ignition and Knocking|pre-ignition]] due to compression - ensuring the fuel ignites only from a spark from the [[spark plug]] - whereas the cetane rating does not. Instead, the cetane number measures the delay in the ignition time of the fuel - the time between when the fuel is injected into the chamber and when the combustion begins - is minimized. Unlike gasoline engines which attempt to minimize or erase any ignition due to compression, diesel engines ''rely'' on this compression ignition and thus no spark is involved. A higher cetane number simply means the time between when the fuel is injected into the combustion chamber and when the fuel ignites is minimized - meaning that the fuel ignites due to compression more easily. This shorter delay time results in more complete fuel combustion.<ref name="RE1"/>

For a video explaining this type of ignition in depth, click [https://www.youtube.com/watch?v=WdQ4J-NFoU8 here].

==Benefits of a High Cetane Rating==
A higher cetane number resulting in quicker ignition of the fuel leads to less non-ignited fuels building up inside the combustion chamber, as well as more complete fuel combustion. Better fuel combustion and quick ignition leads to quicker starting for vehicles, as well as an engine that operates more quietly as only misted fuel is ignited and buildup inside the engine is minimized. As well, fuel [[efficiency]] improves with more complete combustion and harmful emissions are reduced.<ref name="RE3">FS Fuel and Lubricants. (May 14, 2015). ''High Cetane Fuel'' [Online]. Available: http://www.gofurtherwithfs.com/Whitepapers/Diesel%20Fuel%20Cetane%20Number.pdf</ref>

Generally, the owners manual that comes with new vehicles has manufacturers recommendations as to which cetane rating a vehicle should use to ensure the engine is operating at its peak.

==References==
{{reflist}}
[[Category:Uploaded]]