Re: [EnergyPlus_Support] Re: Defining DesignDays based on the weather file

On Mon, Jun 4, 2012 at 8:51 AM, Linda Lawrie <linda@xxxxxxxxxxxxxx> wrote:

I've thought about this -- currently there is no way for EP-Macro to read environment variables that might have the weather file name.

What you can do is use the EP-Launch "counter" so that in the idf you would have something like:
(this is from the parametric example file in the YG files area, so doesn't have location usage):

! Include the run sequence counter file generated by EP-Launch
! This reads in the current counter setting during the group simulation
##include counter.inc
! Set up variables for each case
! In this example, a variable name BuildingNorthAxis is set to a value which is used
! later in the north axis field of the BUILDING object.
##if #[counter[] eq 1]
! Case 1 - Building north axis 0
##set1 BuildingNorthAxis = 0
! set other variable names here as desired
! or use counter[] directly in ##if blocks elsewhere in the input file
##elseif #[counter[] eq 2]
! Case 2 - Building north axis 90
##set1 BuildingNorthAxis = 90
! set other variable names here as desired
##elseif #[counter[] eq 3]
! Case 2 - Building north axis 180
##set1 BuildingNorthAxis = 180
! set other variable names here as desired
##elseif #[counter[] eq 4]
! Case 2 - Building north axis 270
##set1 BuildingNorthAxis = 270
! set other variable names here as desired
##else
! Invalid counter

Output:PreprocessorMessage,
    Parametric Example File, !- Preprocessor Name
    Fatal,                   !- Error Severity
    Invalid counter value = counter[], !- Message Line 1
    Expecting values from 1 to 4; !- Message Line 2

##endif
! Test that all required variables have been set.
##ifndef counter[]

Output:PreprocessorMessage,
    Parametric Example File, !- Preprocessor Name
    Fatal,                   !- Error Severity
    "counter" variable has not been set, !- Message Line 1
    Probably means the include file was not read successfully; !- Message Line 2

##endif

At 06:42 AM 6/4/2012, hnoboam wrote:

Thanks for your advise, the include would certainly make the macro shorter.

What I have not figure out, is the way to learn the location from the Weather File, i.e. the 725300 (or the weather file name itself, or the "Chicago Ohare Intl Ap, or whatever particular information I could get to use in the ##if) as a variable; in the macro below, the "Site".

My problem boils down to: Can I know the site location from the Weather file inside the macro?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jason Kirkpatrick <jason.alan.kirkpatrick@...> wrote:
>
> If you're reading the site:location from the .stat file then couldn't you
> also read the design day data from the .ddy file?
>
> Something like this:
>
> ##if Site = 725300 ! Chicago
> ##fileprefix C:\EnergyPlusV7-0-0\WeatherData
> ##include USA_IL_Chicago-OHare.Intl.AP.725300_TMY3.ddy
>

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