SOLAR Energbie Technologies !!

Flat Plate Solar Water Heating System

SET Solar Absorber Fins

Selectively coated Solar Absorber Fins collect Solar Heat and transmit it to the water flowing through the riser pipes. The Black chrome Solar Selective coating absorbs @ 95 % Solar radiation and emits less than @ 15 %. Use of 99.9 % pure copper for absorber sheet and riser tubes ensures high thermal conductivity.

The Riser Tubes are welded to the absorber sheet by Ultrasonic welding or Laser beam welding. Laser beam welding covers upto 40 % of the Riser Tube circumference and is comparatively more efficient than Ultrasonically welded fins which have intermittent welding spots.

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 strength

SET solar Flat Plate Collectors (Specifications – read together with Solar Absorber Fins )

SET solar Flat Plate Collectors are available in two attractive colours – Golden Yellow and Ivory. The collector box has a frame of Extruded Aluminum sections and the Aluminum back sheet is firmly pop riveted to the casing. Proper insulation and a high grade reflector below the absorber panel and use of low iron content glass for glazing enhance the efficiency of the collector.

SET solar Flat Plate Collectors are regularly checked and certified by Bureau of Indian Standards under IS 12933 : 2003. The Collectors have been appreciated by a number of installers who integrate their own systems with our collectors.

1	Brand	SET solar
2	Overall size**	2030 mm x 1090 mm x 95 mm.
3	No. of fins per collector	9
4	Header tube	Copper tube Dia. 25mm x 0.7mm thick
5	Absorber area	2.06 sq. M
6	Rated pressure	2.5 Kg/ sq. cm.
7	Leakage Test pressure	5 Kg/ sq. cm.
8	End connections	Brass flared Flanges or threaded 1” BSP
9	Collector box	Specially Extruded Aluminum sections, powder coated
10	Box Corner joints	SS screws
11	Box-back sheet joint	Pop riveted
12	Back sheet	Aluminum sheet 0.71 mm thick
13	Reflector	Aluminum foil 0.02 mm thick
14	Glazing	Tempered glass 4 mm thick - free from bubbles and scratches
15	Transmittance	> 0. 85
16	Sealing	Silicone sealant
17	Back Insulation	Resin bonded Rockwool (Mineral wool) 50 mm thick. R=1.67 sq. M deg. C/ W K = 0.052W/sq. M. k
18	Side insulation	Resin bonded Rockwool 25 mm thick
19	Grommets & gaskets	EPDM rubber
20	Thermal performance	FRUL < 6 W/ sq. M deg. C FR ( T& ) > 0.65

* The collectors are periodically tested by Bureau of Indian Standards as per IS 12933 in one of their approved laboratories.

** Sizes other than above are manufactured against specific requirement.

SET solar Water Heating Systems (Specifications-Read specs for Solar Absorber Fins, Solar Flat Plate Collectors and Hot water Storage tank)

The Solar Flat Plate Collector based systems are available in two modes – passive and active systems.

Passive systems consist of an array of Solar Flat Plate Collectors, insulated hot water storage tank. A set of pipes connects the tank with the Collector array. The system works on simple Thermosiphon principle. There are no moving parts, electrical sensors or any complicated gadgets in this type. These systems are most suitable where output temperature need not be fixed.

Active systems have a pump that feeds water to the collector array. A control panel activates the pump when the temperature of water in the collector array reaches the preset value. Active systems are preferred for systems above 3000 LPD or where the application is commercial or industrial.

In addition to the Flat Plate Collector Systems, our company manufactures all glass evacuated tube collector based SET solar ETC systems. The systems are suitable for small families as well as where the water available is hard.

Hot water storage tanks
1	Capacity	Equal to system capacity
2	Material	SS 304 Non magnetic stainless steel
3	Thickness	1mm to 2 mm depending upon the volume of the tank
4	Insulation	Rockwool sheets 100 mm thick
5	Cladding	Aluminum stucco/ plain finish sheets 0.7 mm thick

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