Turbine output fraction

Good morning to all the forum,
Perhaps my question is very basic, but I would like to understand the concept of "Turbine output fraction" well. I have read the available information, but it is not entirely clear to me. In addition, the interface has changed over time, since before it was in%. The values weight or multiply to what? to the "Design turbine gross output?
Thanks in advance.

Hi Johannes,

The turbine output fraction is an input for the Physical Trough model and some of the other CSP models. It is either a multiplier or a percentage that SAM applies to the design cycle thermal power (a design parameter of the power cycle) to adjust the output of the power cycle. It provides a way for you to control the output of the system.

For example, if the power cycle has a nominal cycle thermal power value of 312 MW, and the turbine output fraction for June 15 at 11 am is 0.9 (or 90%), SAM attempts to adjust the operating parameters in that hour to achieve a turbine input power of 280.8 thermal MW. If more than that amount of heat is available from the solar field, SAM sends the excess to storage if it is available and/or defocuses the collectors to ensure the power cycle input is not more than 280.8 MW.

Best regards,
Paul.