[Strawbale] Re: Glass bottle insulation and ISBBC 2004

Duncan Lithgow duncan at lithgow-schmidt...
Wed Nov 23 17:27:28 CET 2005

Faas, W. wrote:

>Dear Rikki,
>I don't think glass bottles make very good thermal
>insulators. This is because of two reasons:
>1. Glass has a high thermal conductivity -> thermal
>2. The air in a bottle will probably start flowing with
>temperature differences -> convection which transfers more
>heat from warm to cold.
But in a iwne bottle, opening down, you wouldn't go over the magic 100mm
wide air column needed for air to begin circulating much. I've heard it
works fine, but it's a work intensive way to do it. Why not try sea
shells like they do at Friland (http://dr.dk/friland). It's so cheap 
and easy you just whack a metre of it down and you're done!

>About the ISBBC: Last year in beautifull Denmark, there
>were plans to organise the next ISBBC in Canada somewhere
>in the autumn (after the baling-season). Although that's
>still a year away, I'm curious as to wether or not people
>have been brainstorming/thinking about it already.
Well, since you mention the ISBBC you may want to have a sneak peak at
the CD which has been promised for so long. I took over the basic work
from Lars and Joe and it's nearly finished...



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