Characteristic : Europe solar keymark certification Product,very popular in Europe
1 All-glass evacuated tube adopts vacuum insulation, and the thermal preservation of water tank is foaming of polyurethane at high pressure. Our products are configured with energy saving standard, which solves the heat loss caused by the heat transfer, heat conductivity and heat radiation.
2 It has much longer longevity than solar collector heat pipe
3 The influence of water quality is small
4 The water tank and the solar collector are apart ,it is easy to install.
5 The vacuum tubes absorb the solar energy and transfer into heat energy, then pass it to the U pipe, it can get high temperature.
6 There is no water in the vacuum tube , so the tube will not break in the winter.
7 It is steady and credible.
8 It can be combined with the architecture prefectly
9 It can be combined with existing pipeline.
10 It can still operate in the event of occasional tube breakages
11 Evacuated tubes convert solar energy into thermal energy that is transferred to copper U pipes by an aluminum fin with high solar energy absorption and low heat radiance loss. Liquid (pure water or glycol solution) in the U pipe heats up, and the U pipe conducts thermal energy to the water inside the storage tank through internal copper coils.
12 Uses an electrical heater to heat water during cloudy days or at night. As the water temperature can be adjusted using an automatic controller
13 With a testing pressure of 1.2 MPa, this system has a working pressure of 0.6 MPa.


Technical data:
Number of Tubes 10, 15, 20, 22, 25, 30
Length of Tube 1800 mm
Outer Tube Diameter 58 mm
Inner Tube Diameter 47 mm
Glass Tube Thickness 1.6 mm
Tube Thermal Expansion 3.3 X 10 -6 oC
Tube Material Borosilicate Glass 3.3
Absorptive Coating Graded AI-N/AI
Absorptance > 90% (AM 1.5)
Emittance 7 % (100 oC)
Vacuum P < 0.005 Pa
Stagnation Temperature < 220 oC
Heat Loss < 0.8 W/m2. oC)
Reflector Ginning Alumnium reflector plate
The out cover of the solar connector Zinc coated steel sputtering manifold.
Frame Zinc coated steel corner sputtering frame
Insulation Polyurethane
Tested pressure 1.0MPa
Working pressure 0.6MPa
Daily efficiency >55%