[Diy_efi] WI, methanol, and corrosion

[Greg Hermann]

At 2:53 AM 1/23/03, Mike wrote:

>When water droplets in the chamber are heated enough they absorb
>a tremendous amount of heat as they make a 'phase' change into
>vapour.

Yep.

>Although some benefit is had from gaseous vapour, the greater
>benefit is gained from the phase change in the chamber.

Yep.
>
>So you dont want droplets too small otherwise they change to
>vapour before they get to the chamber and you dont want droplets
>too large or they do nutty things ;-)

Not really true. The droplets, no matter their size, will ONLY evaporate
until the gaseous phase of the mixture is SATURATED with respect to water
vapor. Then, unless the temp of the gas mixture rises, NO more of them will
evaporate. Once the intake valve is closed, their is more heat (work)
"available" (in the thermodynamic sense of the word) and the mixture will
warm up and more of the water will evaporate.

Greg

>rgds
>
>mike



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