Working principle of flat plate solar collector:  

A flat plate solar collector is an enclosed metal box with a glass top and a colored absorber plate in the center. To reduce heat loss, the collector's bottom and sides are insulated. Solar energy is converted into heat energy as it travels through the glass cover of the absorber plate. The heat energy is transferred to heat transfer liquid passing through copper pipes, which attached on the absorber plate.

SP

Collector 

·Cover: Mistlite low iron extra clear tempered glass

·Thickness of cover: 3.2mm

·Header pipe: Φ22mm (thickness: 0.8mm)

·Risers: Φ10mm (thickness: 0.7mm)

·No. of risers: 7

·Distance between pipes: 110mm

·Liquid heat transfer: Water or Anti-freeze fluid (Water-glycol)

Absorber (Blue tech): 

·Surface: Eta plus coating

·Thickness:0.12mm - 0.4mm

·Absorber emittance: 5%±2%(Eta Plus)

·Absorber absorption: 95%±2%(Eta Plus)

·Connection between pipes & absorber: Laser welding

Frame:

·Frame material: Anodized aluminum profile

·Insulation & thickness:

Rock wool, density: 50Kgs/M3

20mm under the absorber & 20mm around walls

·Back plate material: Galvanized steel sheet, thickness: 0.4mm