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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