[DSLF] Digest Number 1876

[DarkSky-list@yahoogroups...]

There are 4 messages in this issue.

Topics in this digest:

      1. greenhouse shades
           From: Jan Hollan <jhollan@amper....muni.cz>
      2. Greenhouses
           From: susan harder <lookout@hamptons...>
      3. Greenhouses
           From: susan harder <lookout@hamptons...>
      4. Re: greenhouse shades
           From: "Yvan  Dutil" <yvan.dutil@sympatico...>


________________________________________________________________________
________________________________________________________________________

Message: 1         
   Date: Thu, 2 Feb 2006 10:55:41 +0100 (CET)
   From: Jan Hollan <jhollan@amper....muni.cz>
Subject: greenhouse shades

There is a solution for sustainable greenhouses, a win-win one. It's an
electric driven plastic foil with a thin aluminium layer, put inside a
double glazing -- an integrated roller shade. Actually, it's the
theme of my thesis to be written within weeks.

For a producer of a similar system, see ISO-Roll within www.glastec.com
(click on Produkte, and then on any of the two further items). The only
drawback of their solution is, they don't really care about nighttime heat
insulation. The movable inner layer is to be in the middle of the cavity
(the cavity thickness should be over 30 mm, if possible) and laid flat on
the sides, to build a tight cold air trap. And of course, the foil is to
have an emissivity of below 0.1.

All needed info on the technology should be apparent from my contribution
to the first Passive House conference in Czechia (there are both Czech and
English descriptions).
  http://amper.ped.muni.cz/jenik/windows/ph_brno/

When the technology will become common (it's the only solution to achieve
passive house limits, and a comfortable indoor environment, for tilted
roof windows), I hope it will be demanded by law within EU at least for
lit greenhouses (saving lots of fossil carbon emissions in winter too).

cheers,
 jenik





________________________________________________________________________
________________________________________________________________________

Message: 2         
   Date: Sun, 05 Feb 2006 08:43:46 -0600
   From: susan harder <lookout@hamptons...>
Subject: Greenhouses

Chloe,

My first question for you:  is there any process of review (permits, site plan
review, zoning variances, special permit, building permit) in place for
properties that will have the potential to site greenhouses.  If there is, you
can more easily affect regulations for new construction.  I have not checked
into this thoroughly, but apparently there are "curtains" that can be drawn that
can be opaque (only partly effective) and which also hold in the heat at night.
You could write requirements that these shades must be installed and operated,
or else no interior lighting is allowed through translucent
fabric/glass/covering.

Susan Harder

>    From: "Chloe Legris" <chloe_leg@hotmail...>
> Subject: Greenhouse regulation - help
>
> Hello,
>
> I'm actually revising the regultation to be adopted bye many municipality in
> the next months and the issu about greenhouses seemed to me very important.
> Even if we don't have that kind of installation in our region, it might
> happen and i'd like to included a preventing article on the greehouse
> lighting in the revised regulation.
>
> Can anyone send me a copy of an article/regulation proposal.
>
> Thanks!
>
> Chloe Legris, Eng.
> Project manager
> ASTROLab du Mont-Mégantic





________________________________________________________________________
________________________________________________________________________

Message: 3         
   Date: Sun, 05 Feb 2006 08:48:23 -0600
   From: susan harder <lookout@hamptons...>
Subject: Greenhouses

Chloe,

PS:  See this for greenhouse shades:
http://www.griffins.com/tech_service/faqs_greenhouses_curtains.asp


pull up "Curtain Systems" from the scroll on right:

http://www.ngma.com/secure/securedownload/download.htm

Susan Harder





________________________________________________________________________
________________________________________________________________________

Message: 4         
   Date: Sun, 5 Feb 2006 20:32:24 -0500
   From: "Yvan  Dutil" <yvan.dutil@sympatico...>
Subject: Re: greenhouse shades

Hi Chloé,

There is also this technology that has been tested in Canada. It provide 
both shading and very good insulation.

http://www.solaroof.com/

Yvan Dutil 




________________________________________________________________________
________________________________________________________________________


_________________________________________________
To subscribe to the DarkSky List Forum send email to:  
DarkSky-list-subscribe@yahoogroups...  or visit:

http://groups.yahoo.com/group/DarkSky-list/join

Help save your town from obtrusive lighting --
Invite your Planning and Zoning department and
local officials to join us!  Please visit the IDA & CRL
websites at http://www.darksky.org and 
http://www.crlaction.org frequently, too!
------------------------------------------------------------------------
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/DarkSky-list/

<*> To unsubscribe from this group, send an email to:
    DarkSky-list-unsubscribe@yahoogroups...

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
 
------------------------------------------------------------------------