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SOLAR THERMAL
Pulsar EVACUATED TUBES
Evacuated tubes are the absorber of the solar water heater. They absorb solar
energy converting it into heat for use in water heating. Each evacuated tube
consists of two concentric glass tubes made from extremely strong borosilicate
glass. The outer tube is transparent allowing light rays to pass through with
minimal reflection.
The inner tube is coated with a special selective coating which features excellent
solar radiation absorption and minimal reflection properties. The top of the two
tubes are fused together and the air contained in the space between the two layers
of glass is pumped out while exposing the tube to high temperatures.
This "evacuation" of the gasses forms a vacuum, which is an important factor in
the performance of the evacuated tubes. The vacuum in the evacuated glass tube
is less than 5×10-3 pa this can only be reached and maintained over a long period
of time through a specialized evacuation process in production resulting in an
almost total elimination of convection and conduction losses from the tube.
BENEFITS AT A GLANCE:
· Highly efficient, direct flow vacuum tube collector for high
levels of utilisation of solar energy
· Universal application through vertical or horizontal installation
in any location, either on rooftops, walls and freestanding
installation
· Easy and safe connection of the individual tubes through an
innovative plug-in system
· The absorber surfaces, which are integral to the vacuum
tubes, are not susceptible to contamination
· Tubes can be rotated for optimum alignment with the sun,
thereby maximising the energy yield
· Highly effective thermal insulation of the header casing
for minimum thermal losses
20 Evacuated Tube Solar Water Heater
Product Model
Number
DBS 200
Rated Heat
Output (kW)
1.898
No of collectors
1
Total Aperture area
1.8982 m2
Total Gross area
3.64 m2
Estimated annual
energy yield
854.19 kWh
Solar collector type
Evacuated Tube
30 Evacuated Tube Solar Water Heater
Product Model
Number
DBS 300
Rated Heat Output
(kW)
2.847
No of collectors
1
Total Aperture area
2.8474 m2
Total Gross area
4.92 m2
Estimated annual
energy yield
1281.33 kWh
Solar collector type
Evacuated Tube
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