Energy Plus EPPY Scripting - Design Day Problem

edit

eppy can read a "weather.ddy" file. (The design days are in the *.ddy file). You can do:

# assuming you have already opened an E+ file called `idf`
ddyidf = IDF("weather.ddy")
designdays = ddyidf.idfobjects["SizingPeriod:DesignDay".upper()]
designday = designdays[0]
print designday # check to see if it happened

# copy a design day into your idf file
idf.copyidfobject(designday)
idf.printidf() # check if it actually copied it in.

Using this, every time you switch the weather file, you can write some code that will insert the Design Days from the corresponding ddy file

I think the eppy solution would be a script that populates the SizingPeriod:DesignDay objects based on the data from the DDY files. Another possible solution using Python is to append the appropriate DDY file that has the same name as the epw file. See:

https://stackoverflow.com/questions/1...

See Santosh's answer as that seems like the best way of doing this using EPPY.

This can also be done easily using Modelkit. I just published a demo video on this exact problem.

You would just need to modify your IDF file so that it has no Design Day objects. Then your root file would be just a couple lines, inserting your IDF file and the location parameter. Check out the video, and the subsequent video on rakefiles, and let me know if you have any questions.