The Glazing.mo partial describes the material data
required for glazing construction modelling.
The correct parameter values for your type of glazing can be generated using the Window software from LBNL. In the software open the "glazing system" library. On this page choose the number of layers (typical two or three) and fill in the glazing types. Make sure to "flip" the glass sheet when necessary so that the coating is on the correct side of the glass. Press calc to calculate the parameters.
The resulting parameters can be filled in as follows.
In result tab "Center of Glass Results" copy
Ufactor to U_value. In result tab
"Angular data" open "Angular data". Fill in the values of
Tsol (0-90 degrees) in SwTrans. The last
value (Hemis) is filled in under SwTransDif. Fill in
the values under Abs1, Abs2,
Abs3 in into SwAbs and
SwAbsDif in a similar fashion. Parameter
g_value does not need to be filled in.
Furthermore, it is important that the epsLw_b or
epsLw_a fields of the glazing layers are adjusted to
reflect the effect of the glazing coating, assuming it exists. This
makes the difference of a U value of about 3 W/mK or 1 W/mK for
double glazing! See IDEAS.Buildings.Data.Glazing.Ins2Ar
for an example with double glazing that has 1 glazed sheet with a
coating on the inside.
When no coatings are detected, ie. when the emissivities are
default, an error is thrown to inform the user that he/she is
probably unintentionally simulating low performance glazing. The
error can be disabled with the parameter
checkLowPerformanceGlazing.
To verify the U-value of your glazing system implementation, see IDEAS.Buildings.Components.Validations.WindowEN673
errorLowPerformance for issue #1038.