At 10:51 AM 8/5/2011, Daniel Rocha wrote:
There is no need for literature. If you have 1bar or less and any
temperature above 100C, with 0% RH, you have no liquid water in any
kind of gas, even if that gas is steam.
Actually, if the gas is 100% steam, the RH is 100%.
Yes. The statement is true. The pressure in the E-cat is over 1 bar,
precisely by the amount to correspond to the measured temperature. At
1 bar, if the temperature is over 100 C., the steam is dry. But,
remember, measurements aren't perfectly accurate.
Boilers do not produce dry steam unless it is arranged for the steam
to be in continued contact with a surface over boiling temperature.
Normally, they produce steam that is about 95% quality. I.e, by mass,
95% vapor and 5% liquid water. (I understand steam does not conduct
heat very well, so the existence of some hot surfaces to which steam
is transiently exposed may not be enough to convert the steam to dry steam.)
The statement is only true if the water is in very small droplets,
i.e., mist. Larger masses of water can coexist for some time with
water vapor over boiling temperature.
But in saturated steam, the temperature is nailed to the boiling
point, which depends on pressure.
Add heat, some of the water evaporates. Cool it, some of the vapor
condenses. Temperature resists change, until either the water is all
evaporated, or it is all condensed.
