Gray Flex - Radiational Cooling [RE-wrenches]

[Jerry Caldwell]

That's right Joel, there are different plastic-like
materials of different hardnesses made from hemp. 
Sounds like a very cool futuristic idea.  For now I
guess we can just call it... a pipe dream.

Jerry
--- Joel Davidson <joeldavidson at earthlink.net> wrote:
> hemp conduit?
> 
> Lynne A Carter wrote:
> 
> > If some manufacture out there could make us some
> good flex conduit.  For the
> > ratings needed for PV, Then this issue could be
> solved.  Chris and I would
> > like to see a breathable, fireproof, Hemp Product
> that could be the
> > alternative to the Grey Flex stuff.
> > It could even have a name printed on the side like
> BP or Shell. (don't have
> > stock in homedopot so for get them.)
> > So if your out there get this product on the
> market.
> >
> > Lyn at solarvillage.com
> > Solar Village Institute inc.
> > PO Box 14
> > Saxapahaw, NC  27340
> > Tel. 336-376-9530
> > Fax. 336-376-1809
> > www.solarvillage.com
> >
> > ----- Original Message -----
> > From: Rob Wills <RWills at AdvancedEnergy.com>
> > To: <RE-wrenches at topica.com>
> > Sent: Friday, April 27, 2001 8:12 AM
> > Subject: RE: Gray Flex - Radiational Cooling
> [RE-wrenches]
> >
> > > Jay said "and will fill with water ( I
> > > punch a small hole in the bottom of the loops as
> a drain hole when
> > possible)
> > > over time"
> > >
> > > Many people do not know that a common mechanism
> for water in conduits and
> > > junction boxes on
> > > PV modules is to do with the optical behavior of
> the cells - being good
> > > solar absorbers,
> > > they also have very good emissivity, which means
> on a clear night they
> > will
> > > cool to below ambient.
> > >
> > > If they cool to below dew point, moisture will
> condense on the backs of
> > the
> > > modules, and especially
> > > in junction boxes. It's something to think of
> when designing wiring
> > systems
> > > (and equipment that mounts
> > > to PV modules and frames).  The drain holes are
> important as hermetic
> > > sealing is not possible.
> > >
> > > Rob Wills
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: jay peltz [mailto:jay at asis.com]
> > > Sent: Thursday, April 26, 2001 10:29 AM
> > > To: RE-wrenches at topica.com
> > > Subject: Re: Gray Flex [RE-wrenches]
> > >
> > >
> > > Hi Bill,
> > >
> > > Well actually I am implying that the code
> doesn't always make sense, but
> > > that
> > > isn't anything new in life or in book of code
> that's hundreds of pages
> > long.
> > > And as you know you can ask 4 people and get 5
> answers about the safety of
> > > almost any issue.
> > >
> > > But  there will always be different points of
> view that have good data to
> > > back
> > > them up as well. The guys in charge have to
> listen to the points of view,
> > > then
> > > decide what they think is best and act on it.
> What they decide is what we
> > > are to
> > > do.
> > >
> > >
> > > What I was trying to point out only was the
> seeming inconsistency of some
> > > things, such as flex conduit use for PV vs say
> Air Conditioning installs.
> > > Yes I
> > > know that conduit is only a physical protector,
> and will fill with water
> >  I
> > > punch a small hole in the bottom of the loops as
> a drain hole when
> > possible)
> > > over time.
> > >
> > > I  accept your data but I would like to know if
> you have measured the
> > > temperature of a black rooftop AC install?  how
> does this compare with a
> > PV
> > > system?
> > >
> > > QUESTION:
> > > As the flex is rated for a given temperature,
> then give the geographical
> > > range
> > > of the country, is it possible to use different
> rated flex in different
> > > parts
> > > just like we derate for geographical temps?  For
> example up here on the
> > > northcoast, in Arcata the hi temperature for the
> year might be 80 degrees
> > F,
> > > where as in Sac its probably like 110 or so?
> > >
> > > I am trying to do the best work possible and to
> do that I need the most
> > > information possible.
> > >
> > > Thanks Bill I really do appreciate it,
> > >
> > > Sincerely,
> > >
> > > jay
> > >
> > > Peltz Power
> > >
> > > - - - -
> > > To send a message: RE-wrenches at topica.com
> > >
> > > Archive of previous messages:
> http://www.topica.com/lists/RE-wrenches/
> > >
> > > List rules & etiquette:
> http://www.mrsharkey.com/wrenches/etiquete.htm
> > >
> > > Check out participant bios:
> www.mrsharkey.com/wrenches/index.html
> > >
> > > Hosted by Home Power magazine
> > >
> > > Moderator: michael.welch at homepower.com
> > >
> > >
> > >
> > > - - - -
> > > To send a message: RE-wrenches at topica.com
> > >
> > > Archive of previous messages:
> http://www.topica.com/lists/RE-wrenches/
> > >
> > > List rules & etiquette:
> http://www.mrsharkey.com/wrenches/etiquete.htm
> > >
> > > Check out participant bios:
> www.mrsharkey.com/wrenches/index.html
> > >
> > > Hosted by Home Power magazine
> > >
> > > Moderator: michael.welch at homepower.com
> > >
> >
> > - - - -
> > To send a message: RE-wrenches at topica.com
> >
> > Archive of previous messages:
> http://www.topica.com/lists/RE-wrenches/
> >
> > List rules & etiquette:
> http://www.mrsharkey.com/wrenches/etiquete.htm
> >
> > Check out participant bios:
> www.mrsharkey.com/wrenches/index.html
> >
> > Hosted by Home Power magazine
> >
> > Moderator: michael.welch at homepower.com
> >
> 
> - - - -
> To send a message: RE-wrenches at topica.com
> 
> Archive of previous messages:
> http://www.topica.com/lists/RE-wrenches/
> 
> List rules & etiquette:
> http://www.mrsharkey.com/wrenches/etiquete.htm
> 
=== message truncated ===


__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email To: RE-wrenches-unsubscribe at topica.com
This email was sent to: michael.welch at homepower.com

T O P I C A  -- Learn More. Surf Less.
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01
==^================================================================