[BLDG-SIM] DOE-2.1E Glass U-Value
Jason Glazer
jglazer at gard.com
Tue Aug 10 15:01:55 PDT 1999
I am doing some DOE-2.1E runs and get slightly different
values from two different loads verification reports for
the glass I'm using. Here is the part of the input file:
##set1 UF 0.45
GT1 GLASS-TYPE
SHADING-COEF 0.379
GLASS-CONDUCTANCE #[1 / #[ #[1 / UF[]] - 0.2986 ]]
PANES 1
FRAME-CONDUCTANCE 0.001 ..
I'm not using the Window 4 library. The equation removes
the outside film coefficient from UF in the GLASS-
CONDUCTANCE input assuming a 7.5 mph wind speed. In
addition, I have no frame area defined. Unfortunately, the
LV-H and LV-D report show different results. The LV-H
report shows 0.450 as the center of glass u-value and this
includes the film coefficient. The LV-D report shows 0.430
as the average u-value for the window. Which one is right?
LV-H seems to be the correct value but why aren't they
consistent?
Any suggestions would be welcome.
Jason
=========================================================
Jason Glazer, P.E. mailto:jglazer at gard.com 847 698 5686
GARD Analytics - http://www.gard.com/
Building Energy Simulation and Analysis
List Administrator & 90.1 Consultant
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