Solar hot water system is based on the principle of black body absorption. The black surface of the collector absorbs the heat energy form the sun rays and transfer it to the water passing through the copper tubes. Hot water being lighter in density, raised to the insulated storage tank and equal amount of cold water replaces this hot water from the copper tubs.
From solar water heater, we can increase the temperature to the maximum of 95 deg. Industries like Textile, Hotel, Rubber and Dairy industries as already in use of boiler for generating steam. The hot water can be used as a pre heated wter for boiler. Conventional fuels like LPG, Diesel, Firewood, etc., can be saved at 30% to 40% on their daily consumption
| Absorber | Copper Black Chrome selective coating |
| Fin Type | Deep Serrated Fin to have increased surface area 10 - 15% |
| Copper Quality | 99.99% 0.02pure |
| Collector Area | 2.0 Sq. Mts |
| Header/Raiser Tube | Copper 25/12.5 mm.dia |
| Raiser to Fin Joining | Ultra Sonic Welding |
| Collector Frames | Aluminum Powder Coated |
| Top Cover Glazing | Toughened Glass 4mm.thickness |
| Glass Beading/Gasket | Pure EPDM Rubber |
| Collector Insulation | Pluff Slabs for sides and 50 mm.thick Rock WoolSlabs |
| Flanges | Brass Forged & Machined Flanges |
| Inner Tank Material | Stainless Steel | ||
| Outer Tank Material | Aluminum Cladding | ||
| Tank Capacity | Customized to Customer Requirement | ||
| Inlet/Outlet Pipe | Stainless Steel | ||
| Tank Welding | Tig Welding | ||
| Filler Matetial | Stainless Steel | ||
| Thermal Insulation | Rock Wool | ||
| Heat Retention | 72 hours | ||
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| Description | Calorific Value (kcal/ Kg) | Cost of Fuel in ₹ | Pay Back Period |
| LPG | 10882 | 73.00 / Kg | 16 months |
| Diesel | 10004 | 70.00 / Lit | 24 months |
| Fire wood | 3600 | 3.40 / Kg | 30 months |
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Textile industry at Coimbatore cooking for 750 staffs, 3 times a day. An average, they consume 78 Nos of 19 Kg LPG Cylinders per month. After the incorporation of solar system, their consumption per month is reduced from 78 Nos to 43 Nos.
Focusun Energy Systems is a leading designer and manufacturer of Solar Thermal and Solar Photovoltaic Systems.