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The flat-plate solar collectors are the most fundamental and most studied technology for solar-powered domestic hot water systems. The overall idea behind this technology is pretty simple. The Sun heats a dark flat surface, which collect as much energy as possible.
Flat-plate collector is a metal box with a glass cover on top and a dark-colored absorber plate on the bottom. The sides and bottom of the collector are usually insulated to minimize heat loss. Water gets heated inside the collector tubes and stored in the Hot water storage tank after some time scaling gets started inside the collector’s tubes. It insulated hot water tank, interconnecting piping and electric backup, it heats the water directly.The main use of this technology is in residential buildings where the demand for hot water has a large impact on energy bills. This technology can use Commercial applications include car washes, military laundry, kitchen facilities, also be used for space heating. Solar water heating systems are most likely to be cost effective for above facilities.
Equal to system capacity
SS 304 Non magnetic stainless steel or epoxy coated G.I.
TIG welding (Argon inert gas welding) for SS304.
Suitable for tank capacity.
Glasswool sheets 100 mm thick.
PP Powder-coated G.I. sheets / Aluminum Cladding.
Electrical coil of 2 KW (Optional).
0.5 Kg/cm.2 for normal systems; 3.5 – 5 kg/cm.2 for pressurized systems.
Collerctor Overall size
2030 mm x 1030 mm x 95 mm.
NALSUN Solar selective coating on copper (black chrome on copper with or without nickel undercoating).
Absorber sheet (Copper)
0.12 mm thick x 1900mm L x 155mm W
Riser (Copper tube)
O. D. 12.7mm x 0.5 mm thick x 1922 mm L
Bonding between riser Tube and absorber
Bonding between riser Tube and header
Specially Extruded Aluminum sections.
Box-back sheet joint
150 liter (3-4 Members)
300 liter (9-10 Members)
500 liter (15-16 Members)
2kw electric heater
500 liter (15-16 Members)
*Price of electric unit Rs. 4.5 + tax calculation is shown
*Price of gas Rs. 40/ kg.
*In calculation, cold water temperature kept at 25°C & Heated temperature at 50°C