During the few minutes that the sprinklers are on, do you know how
many gallons per minute are used?
How much roof surface area is covered?
I assume you can hear it every time it comes on, but are so used to
it by now you barely recognize it?
--- In papercreters@yahoogroups.com, Garth & Kim Travis <gartht@...>
wrote:
>
> Greetings,
> Sorry for the confusion. The originator used a public water
supply, I
> don't. I use well water. My well tank sits in a tin building, and
the
> water comes out of the ground around 80F. A piece of galvalume
sitting
> in the bright sun can reach temperatures in excess of 150F very
quickly.
> So, even water that is considered warm by human skin standards,
can
> still cool a roof very well.
> Bright Blessings,
> Kim
>
> ElfNori wrote:
> > Kim has stated the water is coming from the public water source,
which
> > means the water lines are under ground and are the mean ground
> > temperature which, unless you're in a geothermal zone, will be
> > significantly cooler than summertime air temps. In Texas, near
Houston,
> > the average ground temperature should be somewhere between 54°
and 64°,
> > so the water is going to be between 25 and 40° cooler than the
air
> > temperature in the height of summer.
> >
> > ElfN
> >
> >
> > ----- Original Message -----
> > *From:* Pat <mailto:trax78245@...>
> > *To:* papercreters@yahoogroups.com
> > <mailto:papercreters@yahoogroups.com>
> > *Sent:* Sunday, September 02, 2007 1:24 PM
> > *Subject:* RE: [papercreters] Cool Roof - was - containers -
was- Re:
> > ugly eco home
> >
> > Hey Kim,
> >
> > You said "Put a piece of hot metal in water, it cools".
That's true
> > if the water is cool. If you put cool metal in hot water,
the metal
> > heats. Seems to me that the water on the roof would work
only if
> > you keep the water cooler than the temperature of the metal
on the
> > roof. You'd still get some cooling from evaporation of the
water
> > but I don't think it'd be enough to be noticeable. I am
interested
> > in the cool roof technique because I was thinking of putting
the
> > water storage tanks (from a rain catchment system) underneath
the
> > house where it stays fairly cool in the summer and they'd be
out of
> > the way there as well.
> >
> > Would the cool roof pictures and technical descriptions be on
the
> > Yahoo **/Group/*/*/ "HREG" home page? I couldn't find the
pictures,
> > etc on the HREG Yahoo Group home page but maybe you have to
be a
> > member? I'm really interested in the cool roof since I
already have
> > a metal roof….I'm supposing I'll need to install gutters and
a tank
> > to catch the run-off and then distribute it to the
garden/flower
> > beds/etc. but I've been wanting to build the rainwater
catchment
> > anyway… if I caught enough rainwater I wouldn't need to use
as much
> > city water, which would be a good thing! San Antonio isn't
> > **quite** as humid as the Houston area but close so if it
works in
> > Houston it should work here.
> >
> > Your sprinklers run for 12 minutes/day total….how cool do you
keep
> > your house? And how dry is it? Do you notice that your
towels and
> > sheets stay damp? These aren't challenging questions… they're
> > something I'd really like to know before I invest time &
money in a
> > system I don't know if I can live with or not. I really can't
> > **stand** for my sheets to be damp. That's the biggest
problem I
> > have with leaving the windows open at night in the spring
when it's
> > cool….it's usually also damp and it gets everything in the
house
> > damp. EEEEyyyech!!! J
> >
> > Thanks!
> >
> > Pat
> >
> > .
> >
> >
>
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