I have determined the Cl at the center is 0.87 wm2.

What is the ration 2.5 mm from the center?

Given these parameters:

Consider a parabolic collector with the following parameters: - The collector has an aperture of 2 m wide - The rim angle is 45 - Specular reflectance of the concentrator is 0.87 - Assume the incident radiation at the aperture being equal to 800 W/m - Light is parallel to the axis of the parabola. Using the Non-Uniform Solar Disk model diagrams (Duffie and Beckman, Section 7.10), (a) Find the energy flux intensity in the center of the image (i.e. at the intersection of the focal plane with the parabola axis (point A); (b) Find the energy flux intensity at 2.5 mm from the center of the image (i.e. 2.5 mm from the parabola axis (point B); 2 Concentrated image intensity on the flat Flux Intensity receiver of a linear parabolic concentrator > B Distance iIXe