Collector’s Frame: Special aluminum alloy (Al Mg Si 0.5) treated with electrostatic oven painting "Seaside Class" (1)
Blue Selective Titanium Absorber with special coating in air gap, laser welded on copper headers and risers (2)
Absorption’s Coefficient of selective surface with a ≥ 0.95 ± 0.02
Emission’s Coefficient of selective surface with e ≤ 0.05 ± 0.02
Headers (collector outlets) from copper Ø22mm (3)
Manifolds made from copper (4)
Transparent cover of 4mm thickness, low iron, tempered, durable in adverse weather conditions (e.g. hail, extreme changes of temperature etc. ) (5)
Transmissivity coefficient of glass cover t ≥ 0.90.
Back side made Aluminum 0.5mm thick, sealed with EPDM rubber.
Back side Insulation from rock wool 30mm thick with thermal conductivity λ=0.035 W/m grd (tested in 0°C) (6)
Side Insulation in 20mm thick glass wool (7)
Water tightness with black silicone and EPDM rubber (8)
DESCRIPTION OF COLLECTORS WITH SEMISELECTIVE BLACK PAINT ABSORBER
Black paint collectors are identical with the above selective ones, with the only difference of: Semi-selective absorber with special black paint coating in air gap, laser welded. (2)