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[TRNSYS-users] how to get the general U-value?
- Date: Wed, 16 Feb 2005 17:55:55 +0100
- From: "Pietro Filippi" <P.Filippi@xxxxxxxxxx>
- Subject: [TRNSYS-users] how to get the general U-value?
Title: Messaggio
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
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