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Solar Water Heater
Solar water heating deals with the direct heating of liquids by the sun where no electricity is directly generated. Solar heating systems are generally composed of solar thermal collectors, a water storage tank or another point of usage, interconnecting pipes and a fluid system to move the heat from the collector to the tank. This thermodynamic approach is distinct from semiconductor photovoltaic (PV) cells that generate electricity from light. The global solar thermal market is dominated by China, Europe, Japan and India. Hot water heated by the sun is used in many ways.
Bangalore, the capital of Karnataka state in India, has the largest deployment of rooftop solar water heaters in India that will generate energy equivalent to 200 MW every day and will be the country's first grid connected utility scale project soon.
Bangalore is also the first city in the country to put in place an incentive mechanism by providing a rebate, which has just been increased to Rs 50, on monthly electricity bills for residents using roof-top thermal systems which are now mandatory for all new structures. Pune, another city of Maharashtra state in the western part of India, has also recently made installation of solar water heaters in new buildings mandatory.
Evacuated Tube Collector
Evacuated tube collectors is a way in which heat loss to the environment, inherent in flat plates, has been reduced. Since heat loss due to convection cannot cross a vacuum, it forms an efficient isolation mechanism to keep heat inside the collector pipes. Since two flat sheets of glass are normally not strong enough to withstand a vacuum, the vacuum is rather created between two concentric tubes. Typically, the water piping in an evacuated tube collector is therefore surrounded by two concentric tubes of glass with a vacuum in between that admits heat from the sun (to heat the pipe) but which limits heat loss back to the environment. The inner tube is coated with a thermal absorbent. the energy output of flat plate collectors drop off rapidly in cloudy or cool conditions compared to the output of evacuated tube collectors that decrease less rapidly. The energy and emissions cost of a SWH system forms a relatively small part of the life cycle cost and are recovered fairly rapidly during use of the equipment.
Technical Specifications
Output Temperatur
Electric Heater
Tube Coating
Outer / Inner Tube Thickness
Outer Tank
Inner Tank
Tank Insulation
Support Structure
Tube life
60 C - 80 C
Thermostat (Available for extra support)
3 Layer
1.8mm / 1.6mm
AISI-304-2B grade painted steel- 0.4mm thickness
AISI-304-2B grade-0.6mm thickness
50mm PUF(Polyurethane Foam)
Powder Coated mild steel with inbuilt air vent Support
>15 years
Salient features
No more electricity bills for hot water
Hot water during power cuts
Non-welded joints
Greater absorber area, up to 94% auto sun tracking every day
Better performance in winters and not-so-sunny days
Low maintenance and long life of up to 20 yrs
Puf-insulated tank
New, innovative Tank shape
Unique Tank & Collector support structure
Sacrificial Anode to prevent galvanic corrosion
Unique "Anti Condensation" device
Available in capacities of 100, 200, 300 & 500 LPD
Ministry of new & renewable energy approved (MNRE)
Wide-range of applications
Non-welded joints
Sport centers
Holiday villages
Heated swimming pools
Low rise offices