I do not propose anything entering the thermosphere at mach 60.
If you injected it into orbit, it has to re-enter at that velocity.
There is no way around that.
A water droplet entering the upper atmosphere at such a speed
would be instantly vaporized by air friction. If it then re-condenses later, it has to dump the heat of condensation into the atmosphere.
This is what I think you are missing. To boil water, you have to supply a certain amount of heat (the latent heat of vaporization).
Condensation is basically the same thing in reverse- for steam to condense to water, it must transfer heat to another medium (air, a solid).
I think this is all moot. Your model must begin by explaining what geologic process could inject a mass of water/steam equal to three times that of the oceans into low Earth orbit.
Unless you can explain this, the model is a non-starter, physically.
This message has been edited by paisano, 08-02-2005 08:18 AM