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 Post subject: conditions aux limites
PostPosted: Thu Jun 23, 2016 3:16 am -1100 
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WUFI User
WUFI User

Joined: Wed Oct 19, 2011 12:12 am -1100
Posts: 8
Bonjour,

je voudrais savoir comment le logiciel prend en compte les conditions limites. Dans mon cas, j'ai testé de mettre un climat avec de la pluie en imposant une humidité relative fixe de 55% sur ma paroi. Or ceci est contradictoire puisque quand il pleut, l'humidité relative est de 100%. Aussi je voudrais avoir ce qu'il priorise et s'il est possible qu'il ne tienne pas compte de la pluie mais uniquement de l'humidité relative imposée dans ce cas là.

Merci d'avance pour votre réponse


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 Post subject: Re: conditions aux limites
PostPosted: Mon Jul 11, 2016 6:41 am -1100 
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WUFI SupportTeam IBP
WUFI SupportTeam IBP

Joined: Tue Jul 19, 2005 2:50 am -1100
Posts: 104
Location: Fraunhofer IBP, Holzkirchen
Not always if you have rainfall the RH is really at 100 % - it depends on temperature and RH before the rainfall and also the rain temparature.

However - it is important, that the climate data are consistent. That means for example (normally) no sunshine together with rainfall etc. Such combinations can cause bigger problems.

The rainfall should be considered, if the surface material is able to absorb rain water. If it has no liquid transport you also can leave the rainfall out. Outdoor RH is of importance, when for example a roofing membrane is not very vapor tight - in case of tight membranes neither rain nor RH are important, but only temperature conditions.

best regards
Daniel

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Daniel Zirkelbach, IBP Holzkirchen


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