Copper Copper Collector

Copper-Copper collector panel consists of number of fins made of thin copper sheets, welded to copper tube. These tubes are connected to two common pipes known as headers. This entire assembly is put into a metallic box with insulation between the assembly and the box. On the topside, the box is covered by toughened glass in order to protect the fins from the dust, dirt, water etc., and yet allow the solar radiation to fall on the top surface of the fin.

The fins are coated on the top with special material. This is called as solar selective coating. It allows maximum absorption (typically over 95%) of solar radiation in the visible spectrum and limits the thermal emission (to below 5%) in the infrared regime. Thus, maximum energy from the sun is retained in the fin, as heat. This heat can now be transferred to any fluid passing under the fin or through the tube welded to the fin.

TECHNICAL DOMINANCES

Copper-Copper Collector Panel

• High efficiency of the collector plates at 70%
• The metallurgical bonding between the fin and tube is achieved by TIG welding ensures a very high degree of thermal efficiency and 100% bond conductance
• Minimum 9 risers per panel and 8 panels per 1000 LPD capacity
• EPDM inside / outside grommets for holding absorber without allowing moisture entry
• 100% GE Silicone sealing along frame bottom and corner. Bottom back sheet riveted
• Aluminium reflector beneath absorber and on sides, for reduced heat loses
• Powder coating of collector frame for added protection and aesthetic colour
• TIG welded stainless steel hot water storage tank of 304 grade
• Rockwool insulation, 48 kg/m3 density having best thermal characteristics, lowest thermal losses
• Tanks are properly reinforced from outside and saddled for avoiding damage to the insulation and direct   contact of the tank and stand
• Stainless Steel fittings for the hot water storage tank
• Reliable and durable 90° rotation imported ball valves
• Stainless Steel fasteners for collector panels
• Insulation thickness of 100 mm radial with aluminium cladding for the hot water storage tank

Technical Specifications

Solar Copper Copper Collectors :

**   In Tungsten Inert Gas (TIG) welding process, there is no use of solder or adhesive as in mechanical joints. The metallurgical bonding achieved by TIG welding ensures a very high degree of thermal efficiency and 100% bond conductance. Normal bonds like solder, adhesive or mechanical require much wider joints in order for the fin to transfer the heat without additional resistance. On the other hand metallurgical bonding achieves unrestricted transfer of heat from the fin to the tube. The ribbing of the fin surface provides additional strength and rigidity. It also ensures a rugged surface that could survive various handling treatment. Also the regularly spaced ribbing gives a very attractive look. The surface area of a ribbed surface is greater than that of a plain surface. In addition the weld is clean as there are no solder overruns or flux stains. As the bond between the fins and tubes is metallurgical and also as there is no third metal like solder used to join the fin and tube, the durability of the joint is very high.