[TRNSYS-users] how to get the general U-value?
Isabelle BRUYERE
bruyere at arch.ucl.ac.be
Thu Feb 17 00:41:45 PST 2005
Hi Pietro,
Sorry I can't help you with that one. But I also noticed some difference
between the U value given by WINDOW5 and the one showed by TrnBuilt,
especially when you use Krypton between the glasses.
Does anybody have an explanation for that ?
Best regards,
Isabelle
A 17:55 16/02/2005 +0100, Pietro Filippi a écrit :
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>Content-Type: multipart/alternative;
> boundary="----_=_NextPart_001_01C51448.61342D9C"
>
>sorry for another question,
>I "decoded" the reported data from Window 5 as edited in W4-lib.dat file
>in order to describe the global value as described at the "END OF THE
>LIBRARY" in this file (see the example below). I found an exact
>corresspondence for all the data except for the U-value, whose reported
>value I suppose to be a mean value of the reported ones in the "Overall
>and Center of Glass Ig U-values (W/m2-C)" lines. but which ones?
>Otherwise I thought it should simply be the global value reported for the
>glazing system of a given window, but I cannot verify it since a can't
>resume the Trnsys W4-lib story of course...
>can anybody confirm to me that it is correct to assume for U-value what
>given for the glazing system and not get it from the Window 5 report?
>thanks in advance
>Pietro
>
>
>WINDOW 4.1 TRNSYS 14.2 Data File : Multi Band Calculation
>
>Unit System : SI
>Name : TRNSYS 14.2 WINDOW LIB
>Desc : Dble,Low-e,Ar
>Window ID : 5001
>Tilt : 90.0
>Glazings : 2
>Frame : 1 Al no break 10.790
>Spacer : 1 Class1 2.330 -0.010 0.138
>Total Height: 1219.2 mm
>Total Width : 914.4 mm
>Glass Height: 1104.9 mm
>Glass Width : 800.1 mm
>Mullion : None
>Gap Thick Cond dCond Vis dVis Dens dDens Pr dPr
>1 Argon 12.7 0.01620 5.000 2.110 6.300 1.780 -0.0060 0.680 0.00066
>2 0 0 0 0 0 0 0 0 0
>3 0 0 0 0 0 0 0 0 0
>4 0 0 0 0 0 0 0 0 0
>5 0 0 0 0 0 0 0 0 0
>Angle 0 10 20 30 40 50 60 70 80 90 Hemis
>Tsol 0.544 0.548 0.539 0.529 0.514 0.486 0.426 0.312 0.145 0.000 0.453
>Abs1 0.187 0.190 0.200 0.207 0.210 0.218 0.242 0.273 0.248 0.001 0.221
>Abs2 0.048 0.049 0.049 0.050 0.051 0.052 0.050 0.045 0.033 0.000 0.048
>Abs3 0 0 0 0 0 0 0 0 0 0 0
>Abs4 0 0 0 0 0 0 0 0 0 0 0
>Abs5 0 0 0 0 0 0 0 0 0 0 0
>Abs6 0 0 0 0 0 0 0 0 0 0 0
>Rfsol 0.220 0.214 0.212 0.214 0.224 0.244 0.282 0.371 0.574 0.999 0.268
>Rbsol 0.236 0.231 0.230 0.232 0.241 0.261 0.307 0.414 0.629 1.000 0.291
>Tvis 0.769 0.774 0.763 0.749 0.730 0.692 0.605 0.440 0.205 0.000 0.642
>Rfvis 0.138 0.131 0.128 0.131 0.143 0.168 0.217 0.323 0.549 0.999 0.197
>Rbvis 0.127 0.120 0.119 0.124 0.138 0.168 0.233 0.379 0.650 1.000 0.208
>SHGC 0.596 0.600 0.592 0.583 0.569 0.543 0.483 0.366 0.188 0.000 0.507
>SC: 0.69
>
>
>
>Layer ID# 400 1 0 0 0 0
>Tir 0.000 0.000 0 0 0 0
>Emis F 0.840 0.840 0 0 0 0
>Emis B 0.100 0.840 0 0 0 0
>Thickness(mm) 3.0 2.5 0 0 0 0
>Cond(W/m2-C )300.0 360.0 0 0 0 0
>Spectral File None None None None None None
>
>Overall and Center of Glass Ig U-values (W/m2-C)
>Outdoor Temperature -17.8 C 15.6 C 26.7
>C 37.8 C
>Solar WdSpd hcout hrout hin
>(W/m2) (m/s) (W/m2-C)
> 0 0.00 12.25 3.24 7.59 1.44 1.44 1.35 1.35 1.38
> 1.38 1.45 1.45
> 0 6.71 25.47 3.21 7.62 1.51 1.51 1.39 1.39 1.43
> 1.43 1.51 1.51
> 783 0.00 12.25 3.41 6.82 1.41 1.41 1.42 1.42 1.47
> 1.47 1.53 1.53
> 783 6.71 25.47 3.31 7.10 1.51 1.51 1.45 1.45 1.51
> 1.51 1.56 1.56
>
>*** END OF LIBRARY ***
>********************************************************************************
>*WinID Description Aufbau U-Value g-value T-sol Rf-sol T-vis
>********************************************************************************
>1001
>Single_Pane 4 5.8 0.870 0.850 0.075
> 0.901
>2001
>Double_Pane 2.5/12.7/2.5 2.7 0.777 0.727 0.129
> 0.817
>3001
>Triple_Pane 2.5/12.7/2.5/12.7/2.5 1.8 0.700 0.624 0.168
> 0.744
>4001
>Double,low-e 3.0/12.7/2.5 1.7 0.597 0.544 0.220
> 0.769
>5001
>Double,low-e,Ar 3.0/12.7/2.5 1.5 0.596 0.544 0.220
> 0.769
>
>
>
>
>Ing. Pietro Filippi
>Nier Ingegneria SpA
>www.niering.it
>Via Altabella 3, 40126 Bologna
>tel: +39 051234359
>fax: +39 051239530
>
>_______________________________________________
>TRNSYS-users mailing list
>TRNSYS-users at engr.wisc.edu
>https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
Isabelle Bruyère
Université Catholique de Louvain Place du Levant, 1
à 1348 Louvain-la-Neuve
Unité d'architecture - Architecture et Climat Tél : 010/47 21 38
- Fax : 010/47 21 50
http://www-climat.arch.ucl.ac.be/
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