Hi,
I'm running the physical parabolic trough model using 'user defined' HTF data for a new nano-fluid. However, I get negative net electrical energy production. knowing that when I run the same project with predefined HTF data from the proposed list, I get positive results. In the same perspective, I have noticed that when I use the 'user defined' HTF data, the cycle design HTF mass flow rate is not defined (NaN kg/s) and I don't know how to introduced it. Please, can you help?
Best regards