DIYbanter - View Single Post - Is there a boiler that preheats the incoming air?

The Natural Philosopher[_2_]

wrote:
On 14 Nov,
The Natural Philosopher wrote:

CH4 + 2O2 = CO2 = 2H2O.

well you didn't even get that right.

CO2 doesn't equal 2H20

Typo. Have you never made one?

CH4 + 2O2 = CO2 + 2H2O.

AND remember, we are not feeding them a pure oxygen stream anyway, its
mainly nitrogen.
Condensing the water is the equivalent of cooling it through 540 degrees.
so well worth it.
not when its less than 1% of the total mass

11.8% more likely! A worthwhile contribution.

cant be even close to that.

21% of air is oxygen. Even if you are exactly at the whatever its called
ratio to use ALL the oxygen, only one third of it, so 7% of the
incoming, will be in the H20.

so that's 7% of the incoming AT BEST. BUT you have added methane as
well, and that essentially dilutes the mix still further. with CO2

The more carbon to hydrogen ratio there is in the gas the less water
and the more CO2, which reduces water content still further. butane and
propane have a much higher carbon to hydrogen ration.

And you never would run a boiler at critical fuel-air tratis. You run it
well over to ensure complete combustion. And full use of teh fuel.