WATER INJECTION

[steve ravet]

Danny Barrett wrote:
> 
> Well Gents, it seems we have a difinative answer. Thankyou Zack. So, now
> that it has been shown that the steam WILL stay vaporised (which was the
> opposite of my prediction), can anyone come up with anything that will show
> whether the steam's maximum partial pressure will be before or after TDC?
> Also, what if we were to inject the water at say 90 deg C (194 deg F). It
> has not yet boiled, but it has gone nearly all the way to boiling, so the
> energy completely lost due to latent heat of evaporation will be lowered as
> much as possible? This way, we will not be injecting an "inert gas" but a
> liquid that is just about ready to flash to a vapor. Please bear in mind
> that the water would be heated by the exhaust manifold.

Danny, the thing is that most of the energy is absorbed when the water
turns to steam.  The phase changes (ice to water, water to steam) are
what absorb the energy, not raising the temp of the water in the same
phase.  If you can find a thermo book, it has graphs that make it all
very clear.  Bottom line is, it doesn't matter how close you are to
boiling.

--steve


--
Steve Ravet
International Meta Systems
http://www.imes.com
steve at imes.com