Propane fuel alternative
Propane fuel alternative
(OP)
What are the pros/cons of using propane as an alternative to conventional gasoline? What type of A/F ratios are used; ie comp ratios per spark timing?
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RE: Propane fuel alternative
Have you tried google and wikipedia
Is this a homework project
Regards
Pat
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RE: Propane fuel alternative
RE: Propane fuel alternative
It runs hotter.
It is dry so it does not dilute oil so much.
Fuel does not puddle in manifolds and cause poor distribution.
I won't guess if you are talking FI or carby. You need to tell me.
Availability.
It is normally over 100 octane, depending purity of the propane.
The tank is heavy and restricted in shape which complicates packaging.
The capital outlay is substantial.
The ignition system will need recalibrating.
If it is left as dual fuel, the engine cannot be well calibrated to both fuels.
A complete text book will cost more, or you could do a google search of the site and read all the previous threads.
Regards
Pat
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RE: Propane fuel alternative
ht
For example, one can easily calculate oxidant (air) to fuel ratio values for given fuel and oxidant composition.
I have to warn you that the spreadsheet does not directly deal with propane -- C3H8. However, one can always deal with solid fuel having a mass composition of C = 0.818182 [kg/kg] and H = 0.181818 [kg/kg]. In order to get the combustion products flame temperature, one needs to make some minor enthalpy adjustments in the spreadsheet.
Propane fuel composition contains more carbon than gasoline resulting in having more CO2 in the combustion products for stoichiometric combustion conditions -- if the combustion products flame temperature is maintained at a fixed value, my assumption may not be true ...
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RE: Propane fuel alternative
RE: Propane fuel alternative
http://www.engineering-4e.com/calc3.htm
In my opinion, the compression ratio based on volume basis is around 10 [/].
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RE: Propane fuel alternative