[EnergyPlus_Support] Weather files and Pyranometer measurements

["jebitsy" <blakje@xxxxxxxx>]

Hello,

I am trying to build a local weather data file for a test site in 
Wyoming.  I started with a TMY2 file for the closest location I could 
find and am "adjusting" it for locally measured conditions.  One of 
my measurements is a LI-COR LI-200SZ pyranometer sensor that "records 
radiation received from the whole hemisphere."  My understanding is 
that this is equivalent to the global horizontal radiation with sky 
cover (total and opaque?) taken into account.  The measurement is 
recorede in W/m^2.

Do I have to try to back out which part of this is direct normal 
radiation and which part is diffuse horizontal radiation, or can I 
get the software to do this for me?  Is there another/better/easier 
way to use this measurement?  (e.g. a multiplier on some weather file 
entries)

This radiation measurement is recorded every minute.  If I build the 
weather file with  minute resolution, what units should I use for 
radiation values?  The software is looking for Wh/m^2.  If I were to 
build a weather file with one hour resolution, I assume I would add 
up the previous 60 1-minute values and use that.  I do not know what 
to do for a 1 minute resolution file.

I used the following web site with detailed definitions for the 
weather file. 
http://rredc.nrel.gov/solar/pubs/tmy2/tab3-2.html

Thanks in advance for your help.
Jeb Blakeley


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