"Solar position table" and "Collector incidence angle table"

Dear Rahmi,

The default linear Fresnel case uses the Solar position table option for the collector efficiency table. That option specifies an optical efficiency value for a range of solar azimuth and solar zenith angles as described in the Help topic for the Collector and Receiver page .

If you change the option from Solar position table to Collector incidence angle table, you must also change both the angle values in the table row and column headings, and the optical efficiency values in the table.

Best regards,
Paul.

Dear Rahmi,

If you change the option from "solar position table" to "collector incidence angle table," SAM does not change the angles or efficiency values in the table. When you change the option, you must be sure to also change the angles and efficiency values in the table to represent the field efficiency at different collector incidence angles instead of at different sun angles.

If you change the option without changing the values and run a simulation, SAM assumes that the sun angles preserved from the old table are collector incidence angles, and the results are meaningless.

Best regards,
Paul.

Dear Bahram1374,

Try exporting the default data from the table in SAM. You can use the exported text file as an example to see how to format your data. When you have a correctly formatted text file with your data, you can import it.

Best regards,
Paul.