On 11-06-20 08:54 PM, Terry Blanton wrote:
On Mon, Jun 20, 2011 at 8:52 PM, Stephen A. Lawrence<[email protected]> wrote:
So you're saying the chimney would act like a steam dryer on an old
locomotive?
Interesting...
Either that or Rossi has discovered antifuggingravity. Come on!
Water is heavier than air.
Eh, no, actually it takes a little more than that.
The simple steam domes on old locomotives would keep liquid water from
splashing into the pipes but a simple dome didn't produce "dry steam"
all by itself.
See, for instance, the following "tangential steam dryer" which could be
fitted into a dome to turn it into an effective dryer:
http://www.trainweb.org/j.dimech/6167/etsd.html
They run the steam through a whizzy whirligig thing in order to get the
entrained water droplets out of it. Gravity alone isn't enough, any
more than gravity keeps dust from being entrained in the air in your
house and your furnace ducts. To get out the water -- or the dust --
what you need to do is get the gas to go around a sharp turn; the
entrained droplets (or dust) don't corner as well as gas, and will smash
into the wall at that point.
For a demonstration in your house, find a heating duct which is blowing
on something (floor, ceiling, wall), such that the air needs to make a
sharp turn as it comes out. You'll typically find a dirty spot where
the entrained dust "fell out" of the air.
For another example of the effect, find an old electric fan which has
been heavily used, and look at the leading edges of the blades. The air
must get out of the way very quickly as the blade comes around, and the
entrained dust can't make the turn. Consequently, you end up with a
layer of crud plastered onto the leading edges of the blades.
But just sending gas up a vertical pipe is certainly not enough to
either clean or dry it.
