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Re: [Strawbale] Searching for the Danish SB R-value testing results
contact@lamaisonenpaille... wrote:
I'm searching for the Danish SB R-value testing results. So I can
compare them with the German, Austrian and French results. Other
(serious) tests are also welcome. I
What I've found so far is :
Country Dry density(kg/m3) Mesured Lambda (W/m.K)
Germany 90 0,05
============================================================
(Converted to Murrican units)
5.62 lbs/ft^3 0.35 Btu*inch/hr*ft^2*degF
( R-2.88 per inch)
===========================================================
Austria 100,8 0,05
============================================================
(Converted to Murrican units)
6.29 lb/ft^3 (conductivity and resistivity same as German)
===========================================================
France env. 70 0,07
============================================================
(Converted to Murrican units)
4.37 lbs/ft^3 0.49 Btu*inch/hr*ft^2*degF
(R-2.06 per inch)
=============================================================
Without commenting upon the values suggested by the above tests, as a group
I find the results curious.
Given that thermal conductivity will vary with density as well as moisture
content, it's disturbing that the German and Austrian results are
identical (to two decimal places!)
even though there is an almost 12% difference in density between the two.
And given the powder-puff density of the French bales it's not surprising
that the R-value is so low. Those bales probably should not have been used
. For pastry maybe, but not for thermal testing of building-quality bales.
[Muttering to self in a non-Europee'in langauge] Euros !
(And to those who don't speak English and may not catch the
tongue-in-cheek tone of the above comments, don't bother getting too
upset. Just razzin' y'all. The intent of this message was just to provide
the conversion to Murrican units for the North American audience.)
--
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c at ChaffY a h o o dot C a >
(manually winnow the chaff from my edress in your reply)
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