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The reflector shape is the single most important factor in the success of your concentrator, and its true that the mathematics involved can be somewhat intimidating. Fortunately, there is a way to get the curve right without calculating anything! Just follow these easy steps.
- Determine the focal point and mirror center
- Measure R
- Measure Ry
- Apply the Solarian Law
- Draw the parabola
- Find the center point with a measuring tape
- Try to mark 50cm above and below this point
- Draw the second parabola
- Choose the reference crossings
- Bend and mark the bars
- Assemble the skeleton
- Trim the short bars
1. Determine the focal point and mirror center
We assume you have already built, or at least decided on the structure of your concentrator. You will need to identify the center point of the reflector, and also that of the focus. For the rest of this guide, the terms 'mirror center' and 'focal point' will refer to these two points.
