See my reply below.
Pedro.
On 13-10-2011 10:33, dan_grunbaum wrote:
Thanks Pedro,
When beam solar strikes a surface, my understanding is that the reflected component is diffused and the diffused solar is shared evenly amongst other surfaces withion the zone. I assume the diffuse reflected solar also transmits through any internal glazing? Yes, the diffuse solar radiation reflected by the surfaces can be transmitted through interior windows. you can see how much reflected diffuse is entered in the zone adjacent to the facade by using the output "Zone Diff Solar from Exterior Windows" (the name might be missleading, but it's this one).
Also, how is solar reflected by the internal blind treated? The inputoutput reference suggests that it is reflected as diffuse. if this is the case, how is the diffuse reflected solar shared amongst other surfaces within the zone? Is it shared evenly amongst all surfaces as well? The presence of a blind is treated by the program like a normal layer of the window. Meaning that all radiation reflected by the blind (which is converted to diffuse, a particularity of the shading device) is equally shared with all surfaces in the zone.
Regards,
Dan
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Pedro Peixeiro <ppeixeiro@...> wrote:
>
> Dan,
>
> The radiation that eventually passes through the blind is transmitted
> through the interior window. You can use the output "beam solar
> transmitted through interior window" in order to evaluate this.
>
> Pedro.
>
> On 13-10-2011 8:27, dan_grunbaum wrote:
> >
> > Hi there
> >
> > I'm attempting to model a ventilated double skin facade by creating a
> > cavity zone 1000mm deep adjacent to the occupied (perimeter) zone. The
> > external surface of the cavity is glazed and the internal surface
> > seperating the cavity from the perimeter zone is also glazed and there
> > is an operable blind within the cavity.
> >
> > We are currently using the FullExteriorandInteriorwithReflections
> > solar distribution model. From documentation in the inputoutput
> > reference we can see that solar transmitted through the external
> > window is traced and then EnergyPlus calculates the amount of beam
> > radiation falling on each surface in the cavity zone, including floor,
> > walls and windows. However it is not clear in the inputoutput
> > reference what happens to radiation that falls on the internal window
> > seperating the cavity and perimeter zone.
> >
> > Can someone confirm that the beam radiation is transmitted through the
> > internal window into the perimeter zone?
> >
> > Thanks,
> > Dan
> >
> >
>
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