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System Advisor Model (SAM)

Weather file with time step <= 20 min

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Anton Driesse
Topic Author

20 Dec 2021 13:52 #10418 by Anton Driesse

Weather file with time step <= 20 min was created by Anton Driesse

Is there a weather file available with time step <= 20 min to test the transient thermal model capabilities?

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pgilman

21 Dec 2021 00:46 #10420 by pgilman

Replied by pgilman on topic Weather file with time step <= 20 min

Hi Anton,

You can download 5-minute and 15-minute weather files from the NSRDB, either directly from SAM by clicking Advanced download on the Location and Resource page or from the NSRDB website at nsrdb.nrel.gov.

Best regards,
Paul.

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Anton Driesse
Topic Author

21 Dec 2021 10:46 #10426 by Anton Driesse

Replied by Anton Driesse on topic Weather file with time step <= 20 min

Thanks, Paul. I found some 5-minute data there.

I suggest making the cell temperature equal to the steady-state temperature at night, rather than zero C.

Anton

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mprillim

21 Dec 2021 22:09 #10431 by mprillim

Replied by mprillim on topic Weather file with time step <= 20 min

Hi Anton,

Looking into the code, the zero degree temperature values shown in the outputs for nighttime operation are not the values that are passed into the moving-average window. The cell temperature (steady-state) time series is what is looked at for the moving-average window, then the resulting output temperature from the transient model is stored in the cell temperature output time series. For nighttime operation, the steady-state value of the temperature is assumed to be the ambient temperature from the weather file because there is no irradiance. The value calculated from the transient thermal model is changed to zero in the outputs for nighttime operation to signify no electricity output, but the SAM team will revisit the reporting of that output in order to avoid confusion.

Thanks,

Matt Prilliman

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