CSP

Hi
I am working on CSP physical
HTF user defined DOWTHERM A
But ? have error below
time 3600.00 { Physical Trough Solar Field 2 }:
The solution encountered an unresolvable NaN error in the heat loss calculations. Continuing calculations...
time 3600.00 { Physical Trough Solar Field 2 }:
The solution encountered an unresolvable NaN error in the heat loss calculations. Continuing calculations...

how can I fix ???

good night

Hello,

If you are only seeing a few of those simulation errors, you can probably ignore them, because the will not have a large effect on the total annual output of the system, which is the value that is important for the cash flow calculations.

Best regards,
Paul.