Loss of energy in PV Component-Based Model due to temperature

[JP]

Hi!

I am modelling a PV component-based sys. Varying the ambient
temperature to see effects in energy output.
The energy output changes in a linear way, when temperature is
changing in a linear way.
nonetheless the loss is higher than the predicted by the module
temperature coefficient.
can anybody tell me why?

In other words:
there are more losses due to temperature rising, than the module´s
ones?

thanks a lot & greetings

[Blair, Nate]

SAM google Group,

As we released the new beta version this week, please indicate in your questions if you are using the new beta version or if you are using the last official release version from June.

JP- In addition to which version, can you describe which module model you are using (Sandia, CEC, simple efficiency). That would be helpful in responding. For all of them, you can see that there are a variety of issues that compound with the temperature of the cell in order to get the output calculation but how those interact does depend on the module model.

Thanks!
Nate

Nate Blair
Nate....@nrel.gov
303-384-7426

Hi!

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[JP]

Hi all
yes Nate you are quite right, the question is for:
2011,6,3
CEC performance module

My question is divided in two questions:
-there are more losses due to temperature rising, than the module´s
ones?

-how is the module efficiency calculated? something like this?:
[module_effic_at_reference_temp]*[temp_coeff]*(Temp_ref - Temp_cell)

Thanks to you for your help

On Oct 21, 4:51 pm, "Blair, Nate" <Nate.Bl...@nrel.gov> wrote:
> SAM google Group,
>
> As we released the new beta version this week, please indicate in your questions if you are using the new beta version or if  you are using the last official release version from June.
>
> JP- In addition to which version, can you describe which module model you are using (Sandia, CEC, simple efficiency). That would be helpful in responding. For all of them, you can see that there are a variety of issues that compound with the temperature of the cell in order to get the output calculation but how those interact does depend on the module model.
>
> Thanks!
> Nate
>
> Nate Blair

> Nate.bl...@nrel.gov

[JP]

Well i reply my second question, irradiance also has an influence in
efficiency, so should be taken into account
how?

thanks