The Calpak Series VTN evacuatied tube solar thermal collector is described. The operation of this U-bend copper evacuated tube technology is first explained and then the importance of the materials and engineering used to produce it.
This collector is the ideal solution when efficiency is what matters. The CPC parabolic reflector maximizes absorption of direct and diffused solar radiation. Thermal loses are minimized due to the vacuum in the selective tubes and the strong header insulation.