I'm curious if there's a connection between stoichiometric AFR 14.7 and Atmospheric Pressure at sea level 14.7?
Any link between those two?
I'm curious if there's a connection between stoichiometric AFR 14.7 and Atmospheric Pressure at sea level 14.7?
Any link between those two?
coincidence
if you run alcohol or other fuels the ratio would be different for the same pressure
:b
Eric
3geez member since October 12, 2000
"All this worldly wisdom was once the unamiable heresy of some wise man." - Henry David Thoreau
None whatsoever. The stoich ratio is a ratio of air mass to fuel mass. And that assumes a given type of fuel and a given concentration of oxygen in the air. And in fact most pump gas is not exactly 14.7 since they dilute it with ethanol. I want to say it's like 14.5:1 for 10% ethanol.
C|
as below.
14.7:1 stoich is just the ratio of air to fuel that allows it to burn best.
At full power it'll drop to 12:1 or there bouts.
Energy output in any form (including BTU) would have to assume complete combustion, so it's based on the type of fuel only.
1 gallon of gasoline ~= 114,000 Btu
from:
http://www.epa.gov/orcdizux/rfgecon.htm
C|
gotta love the internet
It still seems btu is applicable to an air and fuel mixture, also now I am wondering about furnaces that use the same fuel but have diff btu rating.
Also in the formula is the amount of energy any particular type of fuel can produce at different sea level. I don't see how they can say 1:114,000 unless that is just an average for nominal complete combustion for generic gas engines.
What are you getting at 2ndGenGuy?
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