Design point DNI in IPH Trough, No financial model

Hi Paul, 

Recently i'm tring to simuate a case for solar process heat with Water as HTF in SAM 2020.11.29 r1, i found a strange thing, when i set different design point DNI,  the gross thermal output vary over a wide range, espacilly for those with design point DNI less than 800 w/m2, please see below screen shots:



Design point DNI with 800 w/m2:

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Hi Joey,

This is a bug in the IPH trough model for systems with no storage. We will fix it for the next update to SAM. You can track our progress fixing this issue here:

github.com/NREL/SAM/issues/587

You may be able to work around this problem by adding a few hours of storage.

Best regards,
Paul.

Hi Paul,

Thanks for your quick response.

kind regards
Joey