Can I see and modify the mathematical code of a module in SDK?

joaovitornavarro
Topic Author

13 Sep 2016 22:41 #4761 by joaovitornavarro

Can I see and modify the mathematical code of a module in SDK? was created by joaovitornavarro

Hello.

I want to know if is possible to see and to modify the mathematical code of a module in SDK, instead of only run it. As an example, I want to know if the module of PV systems makes estimations on the panel operation temperature based on meteorological inputs and, most of all, which mathematical formulation is used to do that.

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Paul Gilman

14 Sep 2016 15:39 #4762 by Paul Gilman

Replied by Paul Gilman on topic Can I see and modify the mathematical code of a module in SDK?

Hello,

It is not possible to use the SDK to view or modify the equations in an SSC module. You can set the value of a module's inputs, run the module, and read values of the module's outputs.

For information about the equations and algorithms in a particular module, see the references on the Performance Model Documentation page of this website.

Best regards,
Paul.

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joaovitornavarro
Topic Author

14 Sep 2016 19:31 #4763 by joaovitornavarro

Replied by joaovitornavarro on topic Can I see and modify the mathematical code of a module in SDK?

There is no way to modify the equations in an SSC module?

What I want to do is review one mathematical formulation used for modeling a PV system. Not all of them. I want to modify this one equation and run the simulation.

Can I do that using SAM?

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Paul Gilman

14 Sep 2016 20:25 #4764 by Paul Gilman

Replied by Paul Gilman on topic Can I see and modify the mathematical code of a module in SDK?

No, you cannot modify the equations in an SSC module.

Can you tell me more specifically what calculations you would like to modify?

Best regards,
Paul.

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joaovitornavarro
Topic Author

15 Sep 2016 20:34 #4765 by joaovitornavarro

Replied by joaovitornavarro on topic Can I see and modify the mathematical code of a module in SDK?

Its known that the efficiency of a PV panel is function of its operation temperature. The value may be measured in site or estimated from meteorological data. I want to know the thermal model used in SAM to make the estimation and the performance model that makes adjustments on the outcome of the panel based on its operation temperature. I also want to modify the thermal model to test different mathematical formulations that are available in the literature and see the effect on the overall outcome of the system.

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Paul Gilman

16 Sep 2016 16:19 #4766 by Paul Gilman

Replied by Paul Gilman on topic Can I see and modify the mathematical code of a module in SDK?

For a description of the algorithms SAM uses to model photovoltaic cell temperatures, please see Sections 9.7 and 9.8 of the photovoltaic reference manual available on the Performance Model Documentation page:

sam.nrel.gov/performance

As for modifying equations, we are working on some enhancements to the SDK that will make it possible to make some changes to the underlying code, and will consider your request as we proceed with that work.

Best regards,
Paul.

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