On Mon, 03 Feb 2003 00:31:53 +0000, Ian Woollard
<[EMAIL PROTECTED]> wrote:

>I'm unclear that you want to wet the bottom of the vehicle, because of 
>issues with evenness. Instead I think you need to have the underside 
>dry, but suck heat from it by heating water/steam inside the metal and 
>exhaust the hot vapour through holes; the hot vapour then helps form an 
>insulating layer and reduces heat throughput.

Vapor can't transport as much heat as liquid.

I could be wrong, but I think of it as a flash evaporator on nuclear
steroids.  Dump the water out the back.  It will boil, and then
disassociate, and then blow away, taking a bunch of heat with it.
It's easier to keep the vehicle cool if none of it gets hot in the
first place.

-R

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