- High Density Galvanise Tank
- PUF Insulation
- Inside Marine Coating
- Galvanise Sheet Stand
- High Thick G.I Base and Leg
- Heavy G.I Nipples
- Higher temperature than FPC System
- Thick tank Gives More Strength
- Quick result in rainy and cloudy atmosphere
- Easy to get temperature in hard water
- No need to service for long time
- Household water heating
- Hotel,Restaurants and resorts
- Boiler Feed water preheating
- Industrial and Commercial
|Material||Borosilicate 3.3 glass|
|Inner tube diameter|| 47mm / 54mm
|Tube Length||1800mm /2100mm (whatever applicable)|
|Absorptive coating||Graded AL-N/AL|
|Thermal expansion||3.3*10-6 oC|
|Stagnation temperature||>200 oC|
|Heat loss||<0.8 w / sqm|
|Maximum strength||0.8 MPa|
Evacuated Tube Collector Solar Water Heaters
Solar Glass Tube Water Heater working Alfa Solar Water Heater (ETC System) works on a simple principle ‘Black body heat absorption principle’. The principle says, ‘black colour absorbs maximum heat, more than any other colour’.
Solar water heating systems using vacuum tubes made of borosilicate glass with special coating to absorb the solar energy are called as Evacuated Tube Collector system (ETC Systems).
Vacuum tube, as shown in the sketch, is the main component, which absorbs solar energy. The vacuum tube is an assembly of two concentric, borosilicate glass tubes.
Solar Evacuated Tube Collector Working Air between the gap of two glass tubes is evacuated. It results in high level of vacuum, which acts as the best insulation to minimize the heat loss from inner tube. The black coating on the inner tube absorbs the solar energy and transfers it to the water. The water on upper side of Vacuum Tube becomes hot and thus lighter, so it starts moving upwards in the tank. At the same time cold water, which is heavy, comes downward from the tank and is stored at the bottom. The phenomenon is called as natural Thermo syphon circulation, which occurs in every tube.