[TRNSYS-users] Effective use of overall glass transmission coefficient by Trnbuild

[youness.ajaji at ulg.ac.be]

Please,



Can you cross me off the mailing list. Thanks.



Youness AJAJI

Research Engineer



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  Tel: +32-(0)63 230 917
  Fax: +32-(0)63 230 800
  email:  <mailto:sebastien.thomas at ulg.ac.be> youness.ajaji at ulg.ac.be
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De : trnsys-users-bounces at cae.wisc.edu
[mailto:trnsys-users-bounces at cae.wisc.edu] De la part de hotline
Envoyé : mardi 18 février 2014 11:26
À : 'TRNSYS users mailing list at the Solar Energy Lab, UW-Madison'
Objet : Re: [TRNSYS-users] Effective use of overall glass transmission
coefficient by Trnbuild



Hi Antoine,



as you mentioned, the U-Value is calculated based on the thermal
properties of the glazing. The U-Value

displayed in TRNBuild is the U-value computed according to the reference
conditions given in the standard EN410.

It is only used for user information and supports choosing the right
glazing.



Best

__________________________________________________________________________
________________________



Jochen Lam

TRNSYS Software Team


Transsolar Energietechnik GmbH

Curiestraße 2

70563 Stuttgart

Fax:        +49 711 67976-11
Email:     <mailto:jlam at transsolar.com> jlam at transsolar.com

Web:       <http://www.trnsys.de> www.trnsys.de



Von: trnsys-users-bounces at cae.wisc.edu
[mailto:trnsys-users-bounces at cae.wisc.edu] Im Auftrag von Antoine Gautier
Gesendet: Dienstag, 18. Februar 2014 11:11
An: trnsys-users at cae.wisc.edu
Betreff: [TRNSYS-users] Effective use of overall glass transmission
coefficient by Trnbuild



Hi



Looking at the documentation p. 5-111 (Window data used by the Type 56)
and 5-167 (Heat Flux between Window Panes) I do not understand what is the
exact use of the overall glass transmission coefficient in Trnbuild.
Indeed it seems that the overall transmission is rather computed based on
the physical properties of glass and gap layers. If the value from the
Window file is indeed used could you please confirm me the actual ambient
conditions: have they been changed to be closer to the standardized ones?



Thanks a lot for your help

--

Antoine Gautier

Solamen

+33 6 58 24 02 60

antoine.gautier at solamen.fr



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