heat source within the wall

Everything concerning hygrothermal Sources & Sinks within the assembly
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Philip F
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heat source within the wall

Post by Philip F » Tue May 03, 2016 5:24 pm -1100

hi everyone,

does anybody know, how to define a thin layer within the wall that has water characteristics. It is supposed to simulate a capillary network in the exterior walls.

I'd be glad about some ideas!! Thanks :)

Philip

Christian Bludau
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Re: heat source within the wall

Post by Christian Bludau » Tue May 03, 2016 7:03 pm -1100

Dear Philip,
heat and moisure sources can be placed in the wanted elements of the calcualtion grid. As the wall is only expressed in an one dimensional section in WUFI Plus, you only can define a moisture source parallel to the surfaces, but not perpendicular to the surfaces.
That could be expressed using WUFI 2D.
Christian

Philip F
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Re: heat source within the wall

Post by Philip F » Sat May 07, 2016 10:19 pm -1100

Hi Christian,

maybe I need a different approach. I just created my own layer embedded in aerated concrete. Now I want to add a heat source for the whole layer (the whole layer should have a temperature of 20°C). Therefore I need to upload a file. How can I upload or create this file? I attached the screenshot for you to see.

Thank you very much for your help!
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Manfred Kehrer
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Re: heat source within the wall

Post by Manfred Kehrer » Sat May 07, 2016 10:31 pm -1100

Philip,
The only way to create a heat source which keeps your layer at a constant temperature is:
1) perfom a calculation with a source
2) export the average temperature of your layer.
3) calculate externally the source/sink on an hourly bases you need to keep your desired temperature
4) recalculate within WUFI

Iterate steps 2) to 4) until your source file does not change anymore which should be at the point where your layer has the desired temperature
Manfred
Wiss, Janney, Elstner Associates, Inc.
Official WUFI® Collaboration Partner for USA/Canada
Enjoy WUFI® :) .... It is easy and complex.

Philip F
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Re: heat source within the wall

Post by Philip F » Sun May 22, 2016 9:46 pm -1100

Hi Manfred,

thanks for your answer!

Could you explain me, how I can perform step 2) "export the average temperature of your layer" ?
Or should I just take the average temperature calculated by WUFI to calculate my heat source externally? But then how does the recalculation (Step4)) work....eventually I need to import an external file to the software, right?

best regards and thanks for your help!

Philip

Manfred Kehrer
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Re: heat source within the wall

Post by Manfred Kehrer » Mon May 23, 2016 2:16 am -1100

If you have an insulation somewhere, most likely there is not a big temp gradient within the air layer, so just use the temperature in the middle.
Yes import from file!
Manfred
Wiss, Janney, Elstner Associates, Inc.
Official WUFI® Collaboration Partner for USA/Canada
Enjoy WUFI® :) .... It is easy and complex.

Philip F
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Re: heat source within the wall

Post by Philip F » Tue May 24, 2016 2:07 pm -1100

Thanks for the quick reply!
What kind of file can be imported in WUFI?

Manfred Kehrer
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Re: heat source within the wall

Post by Manfred Kehrer » Tue May 24, 2016 2:20 pm -1100

Simple,
1st column time [h], 2nd heat source [w/m2]
Tab or space separated.
Manfred
Wiss, Janney, Elstner Associates, Inc.
Official WUFI® Collaboration Partner for USA/Canada
Enjoy WUFI® :) .... It is easy and complex.

Philip F
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Re: heat source within the wall

Post by Philip F » Thu May 26, 2016 2:59 pm -1100

thanks!
Since it's not working, I found the tutorial video on wufi-wiki: http://www.wufi-wiki.com/wufifilme/rest ... d_data.htm

But it's not running, the page is just white (reloading the page doesn't bring any change). Any chance you can send me the video or any other suggestions how I can get it run?

Philip F
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Re: heat source within the wall

Post by Philip F » Mon May 30, 2016 2:10 pm -1100

please, I need this information to perform my simulation!! But the tutorial video online is still not working..... :(

Thank you very much

mwinkler
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Re: heat source within the wall

Post by mwinkler » Tue May 31, 2016 9:33 pm -1100

Dear Philip,
I'm sorry, the link to the tutorial movie was broken. We've fixed it and also updated the video content. You can find it here: http://www.wufi-wiki.com/wufifilme/tuto ... d_data.mp4

Philip F
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Re: heat source within the wall

Post by Philip F » Wed Jun 01, 2016 7:07 pm -1100

Thank you very much for helping!!!! 8) 8)

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