Solar Water Heater.

ETC (Tube) Based Solar Water Heater.

MG Rama Energy offers Evacuated Tube Based Solar Water Heating system for your hot water usage. There are two glass tubes which make single evacuated vacuum glass tube. The tubes are fused on one side and hermetically sealed with each other on the other side. The internal glass tube is coated with highly observing environmental friendly coating to trap the solar energy. The sunlight radiation falls on the glass tube passes through external glass tube and absorbed by the multi layer coating on internal glass tube and converted into heat. This heats up the water contained in the inner glass tube. The heated water is lighter than the normal water thus it starts rising through the tube. The effect is called 'Thermosyphon' (natural circulation) effect which let the water eventually travel towards the top storage tank. Simultaneously cold water from the tank descends to the tube, gets heated in the absorber and rises back to the tank. The cycle keeps repeating. The water retains its heat for a long time as the hot water storage tank is insulated to prevent heat loss.

MG Rama Solar Water Heating System consists of the following major components;

  • Evacuated Solar Glass Tube Collector.
  • Water Tank Stand.
  • Other fitting accessories.
How the SWHS works:

There are two glass tubes which make single evacuated vacuum glass tube. The tubes are fused on one side and hermetically sealed with each other on the other side. The internal glass tube is coated with highly observing environmental friendly coating to trap the solar energy. The sunlight radiation falls on the glass tube passes through external glass tube and absorbed by the multi layer coating on internal glass tube and converted into heat. This heats up the water contained in the inner glass tube. The heated water is lighter than the normal water thus it starts rising through the tube. The effect is called 'Thermosyphon' (natural circulation) effect which let the water eventually travel towards the top storage tank. Simultaneously cold water from the tank descends to the tube, gets heated in the absorber and rises back to the tank. The cycle keeps repeating. The water retains its heat for a long time as the hot water storage tank is insulated to prevent heat loss.

Models
100 LPD, 125 LPD, 150 LPD, 200 LPD, 250 LPD, 300 LPD, 500 LPD
Pressurised : 200 IPR, 300 IPR, 500 IRP
Specification of Tubes
Particulars Specifications
Material Borosilicate 3.3 glass
Outer Diameter ¢ 47mm / 70mm(whatever applicable)
Inner tube diameter ¢ 37mm / 54mm(whatever applicable)
Tube Length 1500mm/1800mm/2100mm (whatever applicable)
Absorptive coating Graded AL-N/AL
Vacuum <5*10-3Pa
Absorptance >92%(Am1.5)
Glass thickness 1.6mm
Emittance <8%(80°C)
Thermal expansion 3.3*10-6 °C
Stagnation temperature >200° C
Heat loss <0.8w/sqm
Maximum strength 0.8 MPa
Tank Specification
Particulars Specifications
Inner Tank MS, Thickness 2.5 mm anti corrosion coated
Tank Cover Galvanize Iron, Thickness 0.5 mm Polyester Coated
Stand Material All Die Cut aesthetic stand M.S. Polyester Coated
Insulation Polyurethane foaming CFC Free Thickness 50 mm
For Pressurised Systems
Inner Tank G.I./M.S., Thickness 2.5 mm anti corrosion coated
Tank Cover G.I./M.S., Thickness 0.5 mm Polyester Coated
Pressure Max. 3 kg/ cm
Other Details
Particulars Specifications
Type Thermosyphon, Gravity Feed
Operating Pressure Atmospheric
Electric Backup (optional) 2 Kw 220V AC, 4 Kw 220V AC with built in Thermostat
Temperature Rise 65OC + 5OC on Standard Condition