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1 | Absorber coating | NALSUN Solar selective coating (black chrome on copper with or without nickel undercoat) |
2 | Absorptivity of coating | 0.92 – 0.96 |
3 | Emissivity of coating | 0.10 - 0.15 |
4 | Temperature tolerance of coating | More than 200 deg. C |
5 | Absorber sheet | Copper sheet 0.19 mm thick x 1900mm L x 120mm W; 99.9 % pure |
6 | Riser | Copper tube Dia 12.7mm x 0.56 SWG x 1920mm, 99.99 % pure |
7 | Bonding between riser tube and absorber | Ultrasonic welding or Laser beam welding |
8 | Finish | Corrugated finish for increased surface area and structural strengt |