SAM only begins to show output at wind speeds above 14m/s

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WillStewart
Topic Author

27 Mar 2024 18:17 - 28 Mar 2024 19:36 #13027 by WillStewart

SAM only begins to show output at wind speeds above 14m/s was created by WillStewart

(resending as first submittal threw an error message)
SAM 5.1.0 (model attached)
Data: From NREL Wind Toolkit South Atlantic Offshore, site 244529 (file attached)
Issue: SAM only begins to show output at wind speeds above 14m/s, though this turbine starts outputing at 3m/s, with max output at 10 m/s
Turbines: 165 of 2020 ATB NREL Reference 15MW

Also the CF is 0.4%, and monthly and annual outputs are two orders of magnitude below expected output.

File Attachment:

File Name: CVOW_2020.sam
File Size:165 KB

Last edit: 28 Mar 2024 19:36 by Paul Gilman. Reason: Attach wind resource file from duplicate post

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Paul Gilman

28 Mar 2024 20:11 #13033 by Paul Gilman

Replied by Paul Gilman on topic SAM only begins to show output at wind speeds above 14m/s

Hi Will,

Thank you for the detailed post with supporting files. We are investigating and I will get back to you as soon as I know more about what is causing this.

Best regards,
Paul.

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WillStewart
Topic Author

08 Apr 2024 11:53 #13068 by WillStewart

Replied by WillStewart on topic SAM only begins to show output at wind speeds above 14m/s

Thank you, Paul, I look forward to your reply

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Paul Gilman

09 Apr 2024 15:42 - 11 Apr 2024 17:58 #13072 by Paul Gilman

Replied by Paul Gilman on topic SAM only begins to show output at wind speeds above 14m/s

Hi Will,

I think the air pressure data in your file is off by a factor of 100. The values are in the range of 995 Pa instead of 99,500 Pa. I tried modifying your weather file by replacing the column of air pressure with values in the correct range and got simulation results that made more sense.

Note that SAM ignores columns of data in the weather file that it doesn't recognize, so you can keep the old pressure data in your file as long as the column heading does not contain "pres".

See github.com/NREL/SAM/issues/1756.

Best regards,
Paul.

Last edit: 11 Apr 2024 17:58 by Paul Gilman.

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SAM only begins to show output at wind speeds above 14m/s

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