Hi Brian,
Your file has two cases, and I'm not sure which one you are having trouble with. When I run a simulation for the first case, I see an error about the HTF hot temperature input:
The design HTF hot temperature 120 [C] is colder than then the design point boiling temperature 310.997 [C] corresponding to the hardcoded design point boiler pressure 100 [bar]
The inlet HTF temperature is colder than the DESIGN boiler temperature.
exec fail(trough_physical): Off design heat exchanger failed
Simulation trough_physical failed :Piping geometry file
Maximum fluid velocity: 1.91
Minimum fluid velocity: 0.30
To section 1 header pipe diameter: 0.0688 m (2.71 in)
To section 2 header pipe diameter: 0.0688 m (2.71 in)
Loop No. | Diameter [m] | Diameter [in] | Diam. ID
--------------------------------------------------
1 | 0.0499 | 1.9646 | 1
2 | 0.1082 | 4.2600 | 1
gen not assigned
Simulation grid failed :gen not assigned
Please make sure you are using the latest version of SAM (2022.11.21) if you aren't seeing that message.
The "design HTF temperature" is the Loop outlet HTF temperature input on the System Design page, so you might try setting it to a value greater than 310 degrees Celsius.
The linear Fresnel direct steam model has a set of default inputs for steam HTF in the solar field -- you could use that as a model for the inputs to your model. You might also set the hours of storage to zero to disable the storage model.
Best regards,
Paul.
