If you look in input/output page 297 it
specifies the object Movable insulation shall not be used in sub-surfaces as
windows.
For that purpose window shading control
can be used.
I don’t know if it fits correctly or
similar than the average U night and day used in French regulation.
Josep Solé
URSA Insulation S.A-
URALITA
European Sustainibility & Technical Manager
Móvil +34 606 42 32 14
P URALITA / URSA se compromete
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De:
EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] En nombre de aymericnovel
Enviado el: miércoles, 28 de julio
de 2010 17:28
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Asunto: [EnergyPlus_Support]
Insulation of external solar shading
Hi,
One of my colleague asked me if E+ takes into account the added insulation of a
closed external solar shading (at night in winter especially). Indeed, the
french energy efficiency standard defines a Ujn (namely U factor day and
night), mainly to take into account that when you close the solar shading and
that it creates an enclosed space between it and the window, the overall U
value is somewhat a bit lower.
Although I personnally think the effect is small, it made me curious. It seems
the object AdvancedSurface:MovableInsulation doesn't fit this use. And I didn't
find any thermal balance equation related to external solar shadings in the
engineering reference. So, so far, it seems to me this particular parameter is
not taken into account in the software.
Has someone a different opinion?
Thanks a million for your advises!
Aymeric
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