On Fri, 22 Mar 2019 at 20:02, Gene Heskett <ghesk...@shentel.net> wrote:

> 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.
>
>
Here's the 'hose-pipe' version.
http://www.bigfogg.com/product411.html

I really don't think you need compressed air......

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