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[EnergyPlus_Support] Re: What will the weather file override?
I would be cautious about using SummerExtreme and WinterExtreme if you are using the simulations for sizing. I have found that they tend to under-size.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "jkneifel_florida" <jkneifel_florida@...> wrote:
>
> In summary,...
>
> (1) I can delete the site:location from the file because the weather file will override it anyways
>
> (2) I can replace the SizingPeriod:DesignDays with SizingPeriod:WeatherFileDays and SizingPeriodWeatherFileConditionType (SummerExtreme as summer design day and WinterExtreme as winter design day) because it will automatically use the weather file data. I will have to change the location up to 15 times within a climate zone. So it would be faster to use the weather file designators because I would not have to copy and paste the design days from each city's DDY file. Will I get the same results with this approach, or is it actually better to use SizingPeriod:DesignDays?
>
> (3) I should change the Site:GroundTemperatureBuilding Surface to match the location. Are the ground temperatures available somewhere? Such as in one of the Data Set files? I have not been able to find them anywhere.
>
> (4) It would be preferred to use the location's precipitation. Currently, the E+ EFG does not specify the precipitation. But if I use the SizingPeriod:WeatherFile approach it will use the rain and snow indicators from the weather file.
>
> Am I understanding the above correctly? Thanks.
>
>
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@> wrote:
> >
> > Attaching a new weather file only changes/overrides the site:location
> > parameters.
> >
> > SizingPeriod:DesignDay are the best indicators if you are doing
> > autosizing of your building and you would need to change
> > them. Site:GroundTemperature only needs to be used if you have
> > ground contact from your building surfaces -- ideally you would
> > change them as well.
> >
> > Another option would be to use the
> > SizingPeriod:WeatherFileConditionType along with extreme period
> > designators (SummerExtreme, WinterExtreme) but this is a bit tenuous
> > as all weather files (though I think most in the US) might not have a
> > SummerExtreme or WinterExtreme period.
> >
> > Of course, if you are using Site:Precipitation, you would need to
> > change that. Not sure about the pollution factors, construction
> > costs, tariffs -- those you would have to think about. And the
> > terrain field in the Building object -- though you may wish to run
> > all in the same kind of "terrain".
> >
> > EnergyPlus Development Team
> >
> >
> > At 09:26 AM 7/20/2009, jkneifel_florida wrote:
> > >I am currently using the EFG to create a standard compliant building
> > >in a particular climate zone. I would like to change the location
> > >characteristics within that climate zone (e.g. Phoenix to New
> > >Orleans) to run the same simulation in a different city. What
> > >parameters in the IDF file will be overridden by the weather file
> > >and what will I need to change by hand? From what I can figure out,
> > >the weather file seems to only override the Site:Location but I
> > >still need to input SizingPeriod:DesignDay and Site:
> > >GroundTemperature for the simulation to run. Am I correct? Or is
> > >there an easier way to change the location characteristics? Also,
> > >are there other parameters that I need to change that I am forgetting? Thanks.
> > >
> > >
> > >
> > >------------------------------------
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> > >
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> > >
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> > >
> > >
> >
>
------------------------------------
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