[TRNSYS-users] PV simulation

[David BRADLEY]

Marco,
   First, I would recommend that you use Type194 in place of Type94 as 
it is a more robust model for simulating the performance of thin-film PV 
technologies. If you are looking at crystalline silicon PV then it is 
fine to continue using Type94. Second, Type94 does take into account the 
negative impact of cell temperature on module performance however, I 
imagine that there are other factors in your change of location that 
overwhelm the impact of the cell temperature. If you would like to send 
me the input file, I can have a look at it.
Kind regards,
  David


On 3/28/2013 06:48, Marco Scarpellino wrote:
> Dear all,
>
> I am trying to simulate a solar PV plant with type 94a in different 
> cities around the world. As known, the efficiency of a pv module, 
> decrease with the increasing of the ambient temperature. It seems 
>  that the component doesn't take properly into account this behaviour. 
> In fact, for example, I find a bigger average annual efficiency of 
> solar field in Ryiadh than in Napoli. I have also noticed that the 
> changing of the value of the parameter n. 8 (=Temperature coeficient 
> of Voc (ref. cond.)) does not produce any change in the output power.
> Do you know what is the reason for these inconsistencies? Where I can 
> finde the source code for this type to check the equation used for the 
> calculation (I don't find it in my installation path)?
>
> Thanks in advance for your help.
>
> Best Regards,
>
> Marco Scarpellino
>
>
>
>
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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
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d.bradley at tess-inc.com

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