Dear Toby and all Th compression ratio of the engine is a purely mechanical concept, the ratio of the cylinder volume at bottom dead center to that at top dead center, BDC/TDC. To this must be added any extra onto pressure from turbocharging,
Simple thermodynamics predicts and practice shows that both power and efficiency increase linearly with CR. Since producer gas has an octane over 180, various groups have been "souping up " gas engines, using CR in excess of 18/1. Little old producer gas has grown up. Tom Reed. BEF Dr Thomas B Reed President, The Biomass Energy Foundation www.Woodgas.com On Feb 25, 2011, at 15:45, Toby Seiler <[email protected]> wrote: > Bill and list, > > Thanks for the post concerning compression ratio. > > I'm under the impression that a small amount of positive pressure on the > intake has a large effect in the engine power, in comparison to a vacuum > intake. How do you think a gas and air pressure of 2-5 pounds or so, would > affect the compression ratio / efficiency if one is using low pressure in > producer gas making? > > Perhaps someone has density information/chart and the way to relates to > compression ratios. > > > Best regards, > > Toby Seiler > Seilertechco > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/
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