[TRNSYS-users] TMY Weather Data File

[David BRADLEY]

Behrang,
   Each data file format (whether it is *.epw, *.tm2, *.tm3, etc.) has 
its own set of data fields (raw data values). Two common fields are the 
global horizontal radiation (beam + sky diffuse radiation falling on a 
horizontal surface) and direct normal solar radiation (beam radiation 
incident on a surface that is always normal to the beam radiation 
vector). *.epw files are EnergyPlus format weather files. The 
definitions of their fields can be found in the EnergyPlus documentation 
set. The definition for the TMY2 fields can be found in a document at: 
http://rredc.nrel.gov/solar/pubs/tmy2/.

   TRNSYS processes the raw data from the file and outputs various solar 
radiation quantities that can be used as the inputs to other components. 
The definition of those outputs can be found either in the proforma of 
the weather reader/processor component (likely Type15) or in the 
appropriate section of the 04-MathematicalReference manual.
regards,
  David


On 09/16/2015 12:36, Behrang Talebi wrote:
> Dear Manager
>
> I have difficulty finding the TMY weather data file for Montreal.
> I have a verified model built in TRNSYS and i need to use the same 
> weather data in my hand calculation.
> The weather file that i have for my model is .epw which is very 
> confusing in terms of solar gains.
> I was checking your weather data manual and realized that the TMY and 
> TMY2 weather file only use two values for the solar gains which are 
> horizental and normal reading. I tried to find the TMY file online for 
> montreal, canada but wasn't successful.
> I would really appreciate if you could tell me how can i find the file 
> and also if tell me by horizontal you mean the total horizontal gain 
> or is it only defused radiation in the sky.
>
> Thank you in advance for your time and help
> Best Regards
> Behrang Talebi
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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