recordGlazing
Extends from IDEAS.Buildings.Data.Interfaces.PartialGlazing (Template used for deprecated glazing types).
Information
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.
Validation
To verify the U-value of your glazing system implementation, see IDEAS.Buildings.Components.Validations.WindowEN673
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nLay (from PartialGlazing) | Number of layers of the glazing, including gaps | |
| IDEAS.Buildings.Data.Interfaces.Material | mats (from PartialGlazing) | Array of materials, ordered from outside to inside. Add coatings to glass by setting epsLw_a for inward facing sides of the glass, epsLw_b for outward. | |
| Real | SwAbs (from PartialGlazing) | Absorbed solar radiation for each layer as function of angle of incidence | |
| Real | SwTrans (from PartialGlazing) | Transmitted solar radiation as function of angle of incidence | |
| Real | SwAbsDif (from PartialGlazing) | Absorbed solar radiation for each layer as function of angle of incidence | |
| Real | SwTransDif (from PartialGlazing) | Transmitted solar radiation as function of angle of incidence | |
| Modelica.Units.SI.CoefficientOfHeatTransfer | U_value (from PartialGlazing) | Design U-value. (Only used for calculation Qdesign) | |
| Real | g_value (from PartialGlazing) | Design g-value. (Not used in calculation, only informative) | |
| Boolean | checkLowPerformanceGlazing (from PartialGlazing) | true | Throw error when the glazing does not have a coating in the cavity |