> Actually one gal/hr seems low.
Yeah, you're right. Did something wrong when I calculated the first time.
Apologies.
> Everything I've heard says it takes pretty much the same
> energy to create a set kw no matter the size of engine.
Likely true for a diesel, but gasoline engines have pumping losses when
lightly loaded. Otherwise a V8 would get the same gas mileage as a
4-cylinder at constant freeway speeds.
> Diesel uses less gal/hr than gas but gas uses less gal/hr
> than propane or natural gas. Natural gas is the least
> efficient to use
I think that's more a function of different amounts of energy per gallon.
Propane and natural gas engines are supposed to be more efficient, in terms
of Btu consumed vs hp-hour produced (all other things being equal); but they
have fewer Btu/gallon so burn more gallons.
Randall
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