[EnergyPlus_Support] Re: Does EnergyPlus support daylighting through internal windows in floors?

["lawrenceblount" <lawrenceblount@xxxxxxxxx>]

Hi Mike and all,

Thank you for your comments.

I have uploaded a folder named "Midfloor window" with 3 idf and my 
weather file.  The names are hopefully self explanatory.  If I open 
the *MAP.csv files and generate a surface in Excel for 1 January at 
10am, I get light spots on the lower floor from the skylights when 
the midfloor window is present.  If I use the file without the 
midfloor window (the only change), I only get the lighting from the 
lower level north window.  The idf is setup to output the dxf file 
for you to view my model.

I really appreciate if anyone can see where I have gone wrong.

Thanks
Lawrence 

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@...> wrote:
>
> If you want to transmit solar from one zone to another, you must 
use a pair of 
> interior windows as you suggest.  This will transmit both beam and 
diffuse 
> between zones, but once the solar enters the second zone it is all 
treated as 
> diffuse.  Search the Input Output Reference for "interior window" 
for more 
> information.  
> 
> The amount of solar transmitted from the attic zone to the zone 
below should be 
> proportional to the size of the interior window, and the remaining 
attic floor 
> area should be opaque.  If you are seeing something other than 
this, please 
> upload input files to the yahoo files area or send zipped to 
energyplus-
> support@...
> 
> Mike
> 
> 
> On 13 Aug 2007 at 9:36, lawrenceblount wrote:
> 
> > Hi,
> > 
> > I am fairly new to EnergyPlus, although I have used Ecotect and 
Tas 
> > before.
> > I have a light well that is effectively a window in the floor of 
an 
> > attic space.  The attic has some skylights.
> > I am finding that when I add a matching pair of windows to the 
internal 
> > ceiling and floor objects that the whole midefloor becomes 
transparent 
> > to direct solar.  If I remove the internal windows the midfloor 
then 
> > becomes completely opaque.
> > 
> > I would like comments as to whether I am likely to be making some 
> > errors or this function is outside the capability of E+. The 
capability 
> > is available in wall elements.
> > 
> > Cheers
> > Lawrence
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> > 
> > Attachments are not allowed -- please post any files to the 
appropriate folder
> > in the Files area of the Support Web Site.
> > 
> > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf 
under the
> > Documentation link and press the "search" button.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> >
>




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