[TRNSYS-users] help Sloped Surface Radiation Error Type 16a

[David BRADLEY]

Riccardo,
   It is not usual to get this warning a few times during a simulation, 
particularly at sunup or sundown times and particularly if you are using 
the simplified algorithms that are needed when only the total horizontal 
radiation is known. If you are getting the warning a lot then it is 
worth looking into. One thing to make sure is that you have specified 
the Type16 simulation start day parameter correctly. If your simulation 
starts at hour 7393, the value of that parameter should be 308. Also 
make sure that your "shift" parameter is et correctly. This value is the 
difference in longitude between the longitude of the location where your 
weather data comes from and the standard longitude for that time zone. 
The third thing to check is the output of Type9. Send the outputs of 
Type9 to a Type65 online plotter and make sure that it is giving you the 
data you think it should. There are a lot of type9 parameters that allow 
you to set how the data is stored, whether it is average or 
instantaneous, etc. Make sure that you are /not /interpolating the 
radiation data that you are reading. If none of these checks help then 
please feel free to send the input file and weather file.
Best,
  David



On 3/6/2013 03:58, Riccardo wrote:
>
> Hello,
>
> I have a problem with Type 16a: the total radiation on a vertical 
> slope facing south (45°) is very high, over the solar constant 
> altought the total radiation on horizontal is not so high.
>
> I only have total horizontal radiation and I'm using Type 9e for the 
> input from wheater data file.
>
> My simulation time is 7393-7561 (week 5-11 november 2012)
>
> The error in the .log file is:
>
> /*** Warning at time       :      7406.900000/
>
> /    Generated by Unit     :     2/
>
> /    Generated by Type     :    16/
>
> /    TRNSYS Message    437 : The total radiation calculated for one of 
> the surfaces has exceeded the solar constant. The component solar 
> quantities (beam and diffuse) have been adjusted such that the sum is 
> equal to the solar constant/
>
> /    Reported information  : Sloped Surface Radiation Error/
>
> Thanks in advance,
>
> *Riccardo Borsatti*
>
> */Politecnico di Milano/*/-- Dipartimento di Energia/
>
> ______________________________
> E-mail: riccardo.borsatti at hotmail.com 
> <mailto:riccardo.borsatti at hotmail.com>
>
> Skype: errebi326
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
***************************
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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20130306/9ad1c308/attachment-0001.htm>