Kostas,
You should not insert 0's (0 is a number !:-) ). Instead, leave
it undefined or better yet, do not reference that you have any
direct normal parameter. The WeatherConverter will then know to
calculate it using the Perez Model. I also recommend that you
look at the results to see if they are reasonable. Back in
November 2013, I found a problem with the direct/diffuse
calculation in the WeatherConverter that I told the E+ Team,
which was then fixed, although I still have some issues about the
sun position being off an hour that was never resolved.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
Thank you Linda for the repply. I used the Weather Converter utility. Actually I modified an existing epw file by inserting my own values for global radiation and inserted zero values for the direct/diffuse components. When I converted the file I found out that energyPlus replaced the zero values with the value 999. Any help with this?
Regards,
Kostas
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Posted by: Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx>
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