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 Post subject: Conductivty - Moisture Content Charts?
PostPosted: Tue Mar 06, 2012 4:59 am -1100 
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Joined: Tue Mar 06, 2012 1:44 am -1100
Posts: 4
Hi all,

Im a student investigating hygrothermal effect of moisture on the heat transmittance of strawbale walls and am new to WUFI. Basically I intend to assess the effect of moisture content at 25%,50% etc etc on the thermal conductivity of strawbale wall.

After inputting the wall build up & running calculations, i was wondering how WUFI outputs this kind of information? I saw a chart on the homepage of the effect of moisture on the conductivity of various insulants. Will Wufi Pro 5 output this information or is it from a different version?

Thanks, sorry if im not explaining myself very well

Tuireann


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 Post subject:
PostPosted: Wed Mar 07, 2012 4:48 am -1100 
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or to put it in far simpler terms, how can one produce this kind of graph? http://i42.tinypic.com/11h9emp.jpg

It is shown on the "overview of WUFI" link on the Basics tab of the main site.
Thanks!


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 Post subject:
PostPosted: Wed Mar 07, 2012 5:01 am -1100 
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WUFI SupportTeam IBP
WUFI SupportTeam IBP

Joined: Tue Jul 04, 2006 10:08 pm -1100
Posts: 755
Location: IBP Holzkirchen, the home of WUFI
Hello Tuireann,

this are measured data about thermal heat conductivity depending on the moisture content. You can not produce them with Wufi, this are the material properties. You can see the curves if you do an double click on the material an see the graph for the thermal conductivity, moisture dependent on the right side.

The values are measured using the guarded hot plate apparatus.
Christian


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 Post subject:
PostPosted: Thu Mar 08, 2012 2:27 am -1100 
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Joined: Tue Mar 06, 2012 1:44 am -1100
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Thanks Christian, i had thought that might be the case! the problem im faced with is I need the moisture dependent thermal conductivity of straw, which isnt in any of the current databases.

Ive noticed theres a project file for straw in the Materials forum, however it doesnt seem to be compatible with the latest versions of WUFI sadly.


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 Post subject:
PostPosted: Thu Mar 08, 2012 2:37 am -1100 
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WUFI SupportTeam IBP
WUFI SupportTeam IBP

Joined: Tue Jul 04, 2006 10:08 pm -1100
Posts: 755
Location: IBP Holzkirchen, the home of WUFI
Hello Tuirean, download the file, if you have a full version it is working... Christian


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