Regarding Solar multiple

Hi Paul,
In SAM for the PTC, when we are calculating solar multiple then we need two values 1) cycle thermal power and 2) field thermal power w/o defocus constraints. 
I know how to calculate cycle thermal power but I couldn't understand how you calculated the field thermal power w/o defocus constraints. 
I attached a image in that when I put the values of the DNI is 600 w/m2 and aperture area 8175 m2, so the solar energy is 4.905 MW then how they convert it  into 3.58. Explain me ?
I also checked the code but noting is related in the code for this.
Thank you, 
Abhishek Meena
IIT Bombay

Hi Abhishek,

For SAM's physical trough model, the "Cycle thermal power" shown on the System Design page is 'q_cycle_des', calculated here:  github.com/NREL/ssc/blob/ce1a12f6f9f57e95a9f311799228896e35cb592d/ssc/cmod_trough_physical.cpp#L899 .

The "Field thermal power w/o defocus constraints" is 'm_q_design_idea', calculated here:  github.com/NREL/ssc/blob/ce1a12f6f9f57e95a9f311799228896e35cb592d/tcs/csp_solver_trough_collector_receiver.cpp#L601 .

Best regards,
Paul.