[EnergyPlus_Support] Re: Visual Comfort Daylighting Modeling

["hisham.rashrash" <hisham.rashrash@xxxxxxxxx>]

Hi Oscar,
Thank you very much for your help.

In HEA01/Assessment Criteria/Daylighting/C (it points you to table 11) they allow using lux levels measurement so that for non-residential buildings it should have >=80% of area belongs to spaces occupied more than 30 minutes to have >=200[lux] average for 2650[h] and the worst point to have >=60[lux] for same hours count.

I am downloading Dialux, I wonder how to export geometry to this software, because I have geometry in osm format done by OpenStudio Sketchup plugin, it is also translated to idf format.

Best regards,
Hisham


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Oscar Hernandez <eng.ohw@...> wrote:
>
> I think for breeam you must to calculate the daylighting factor not the
> illuminance map. Energyplus can do that but you must to pay attention to
> inside colors wall. You can use dialux also to breeam or leed requirements.
> For big projects maybe its the bette way.
> 
> Good luck. Oscar
> On Nov 20, 2013 11:10 AM, "hisham.rashrash" <hisham.rashrash@...>
> wrote:
> 
> >
> >
> > Dear all,
> > I am doing daylighting modeling for a project, I tried Radiance using ruby
> > scripts provided by NREL as a command line interface but for some reason
> > they are returning errors right after executing them.
> >
> > Anyway, I decided to use EnergyPlus v7.2 daylighting modeling, but the
> > fact it doesn't support more than one illuminance map per zone forced me to
> > divide zones into smaller rectangular ones, and to connect these
> > "sub-zones" visually, to do that, I used hypothetical windows with 0.99
> > transmittance as hypothetical separators between these sub-zones and
> > connected them using "outside boundary condition object" fields.
> >
> > Now illuminance maps inside sub-zones with no external windows are
> > returning the same values at all map nodes (100% uniform map, which values
> > are maybe equal to the average value) and this value is very close to the
> > nearest value (by location) in the adjacent space which has external true
> > windows.
> >
> > Am I doing right? I need to know how to model daylighting so that it
> > complies with BREEAM HEA 01 Visual Comfort Credit.
> >
> > Thank you very much.
> >
> > Hisham
> >
> >  
> >
>




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