[TRNSYS-users] beam radiation warnings

[Matt Duffy]

Ben,

I am not too familiar with the creation of TMY/TMY2/TMY3 weather files,
but I do know that the geographical location and the time of day play a
significant role in the comparison between they extraterrestrial radiation
and the beam. I would suggest that you grab a TMY file that is most
similar location and make sure that your own Total Horizontal Radiation is
similar and not off by an hour or so.

Best regards,

Matt Duffy



----- Original Message -----
From: "Ben Elliston" <bje at air.net.au>
Sent: Tue, March 29, 2011 3:51
Subject:[TRNSYS-users] beam radiation warnings


Hi all.

I am using TRNSYS via NREL's Solar Advisor Model.  I've supplied SAM
with my own TMY file constructed using locally sourced weather and
solar irradiance data.  TRNSYS produces 400+ warnings like this:

*** Warning at time       :         9.000000
    Generated by Unit     :     6
    Generated by Type     :    15
    Message               : The calculated value of the beam radiation
exceeded the
maximum possible beam radiation for this timestep.  The beam radiation has
been
set to the extraterrestrial radiation for this timestep.

So that I can troubleshoot my TMY file (or perhaps the resultant
TRNSYS input file), can anyone explain what the warning means,
precisely?  What could trigger it?

Thanks, Ben
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----- End of original message -----