On Friday 22 March 2019 13:47:01 Roland Jollivet wrote:

> On Fri, 22 Mar 2019 at 19:31, Gene Heskett <ghesk...@shentel.net> 
wrote:
> > On Friday 22 March 2019 12:24:55 andy pugh wrote:
> > > On Fri, 22 Mar 2019 at 16:15, Gene Heskett <ghesk...@shentel.net>
> >
> > wrote:
> > > > Lack of the ability to bore very fine threads below
> > > > nominally 10mm discourages me from attempting a needle valve
> > > > design
>
> Why not just mist using an atomising nozzle, much like they do outside
> restaurants on muggy days;
> https://www.aqualitywater.com/about-us
> (see the first drop-down, 'mist cooling' to see nozzles and price of.)
>
> While these use high pressure pumps, I'm sure you could just
> pressurise your system by using the water mains pressure.
> Sometimes there's a hole in the hosepipe and you get a beautiful fine
> mist coming off, so 4bar is plenty pressure to get a mist.
>
> Using air simply adds a bulk volume that has to go somewhere, and
> compressed air is expensive.
>
I think the evaporative cooling of carrying a cold liquid in a lot of air 
to help it evaporate is part of the theory.  So the air is a requirement 
of sorts.  I think thats the reasoning at least.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>



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