Re: [TRNSYS-users] cold bridge

Dear All,

I need a bit more explanation,

What is the idea of cold bridge in TRNBuild?

If I choose colgbridge for the wall it is mean that there is (are) cold bridge(s) in one (few) place in the wall, or that the whole wall is one cold bridge?

Shoulld I draw coldbridge in Google SketchUp or it is possible to add it in TRNBuild only?

Regards,

Karol

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

From: ITF - Adrien JEZEQUEL [mailto:a.jezequel@itf.biz]
Sent: Wednesday, July 04, 2012 2:25 PM
To: trnsys-users@cae.wisc.edu
Subject: Re: [TRNSYS-users] cold bridge

Dear Karol,

You can't modify geometry in trnbuild if detailed radiation model are selected, that's why coldbridges can't be modified.
You can integrate coldbridges in wall u-value definition :

Uvalue = (Uwall*Area + Coldbridge_1 x L_1 + Coldbridge_2 x L_2 + ... + Coldbridge_i x L_i)/Area

For windows, you can do the same and include coldbridges in Uw value (modify c-value)

Best regards

www.itf.biz	Adrien JEZEQUEL Simulations Thermiques Dynamiques
	ITF	62, Rue du Bolliet 73230 St Alban Leysse FRANCE
	Phone : Fax : Mail:	+33(0) 479 750 029 +33(0) 479 852 122 a.jezequel@itf.biz ou aj@itf.biz

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Le 04/07/2012 11:34, Karol Bandurski a écrit :

Dear All,

Could somebody explain me how to model cold bridge effect?

Building, which I model, have balcony. So, I go to zone which is directly

connect with balcony, highlight  exterior wall where balcony hangs and what

data should I put?

There is resistance of connection wall-balcony or whole wall taking into

account this connection?

The same question is to other parameters?

After I accept cold bridge windows I cannot set cold bridge dimension

because it is blocked (gray)... Why?

Thank in advance for your time!!!

Regards,

------------------------------------------------

Karol Bandurski MSc.

Institute of Environmental Engineering

Poznan University of Technology

www.ee.put.poznan.pl

www.put.poznan.pl

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