[EnergyPlus_Support] Re: Shadowing Calculation - Maximum Figures

["zofia.kuypers" <zofia.kuypers@xxxxxxxxx>]

Thanks for that.
I'm interested in the HVAC systems, I'm tring to calculate the 
annual energy usage of the building. Is there any rule of thumb for 
chadowing figures that you know of that?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> 
wrote:
>
> It all depends on your building and what you are interested in 
> studying.  If you're really doing passive analyses, then you want 
> more accuracy in building shadowing but if you're mainly studying 
> effects of HVAC systems, then shadowing is less important.
> 
> You could do a comparison using the "minimal shadowing" option 
> against the only allowing 200 figures in the shadow overlaps.  
(say, 
> for design days) and see how much difference it makes.
> 
> Linda
> 
> At 12:15 AM 4/15/2008, zofia.kuypers wrote:
> >After streamlining all the HVAC schedules(which halved the run 
time)
> >I tried reducing the maximum number of figures in the shadowing
> >calculation section. I reduced it from the default value of 15,000
> >to the minimum value of 200 which did a great job of reducing the
> >run time!
> >
> >What I'm trying to do now is estimate the number of figures that 
is
> >actually required to maintain accuracy. The help file has made 
very
> >little sense to me so far.
> 
> 
> [Non-text portions of this message have been removed]
>



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