It also made a comparison between the thermal trough para anabolic stainless steel in sheet reflectivity and rail para anabolic using aluminium in the reflection.
The comparison between thermal parabolic trough the use of stainless steel sheet of reflective parabolic trough and a sheet of aluminum foil to reflect light.
It also compared the heat between the rails. The Beaulieu C use stainless steel plate to reflect the light and rail para Beaulieu C use aluminum sheet in the light reflection.