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high efficiency solar vacuum tube is interference membrane,common tube
is gradient membrane start up fast/collect solar energy
Our solar collector tubes can start up fast and collects solar energy fully, Long time warranty for 15 years.
We may supply three high efficiency and ordinary tube for your choice:
Difference between three high efficiency tube and ordinary tube
Difference between three high efficiency solar vacuum tube (effective tubes, high cold tube,
high temperature special efficiency tube)and ordinary tube:
Absorption of heat membrane layer is difference between these two kind of tubes.
(Absorption of heat membrane layer is the key part of vacuum tubes.)
Absorption of heat membrane layer of three high efficiency solar vacuum tube is interference
membrane, common tube is gradient membrane. The difference is mainly for interference
membrane and the gradient membrane distinction.
1. Fundamental distinction: membrane layer structure is different, the principle of the
absorption of sun's rays result in differently. gradient membrane, for multilayer, its
absorbing layer is generally 9 layers. It to the sun's rays are layered absorption,
and its absorb the light performance gradually become tall. Because the gradient
structure, launch with increasing temperature rise than work, that temperature in
300 to 500 ºC than when launch greatly increased. The aluminum ions and absorbing
layer in high temperature condition, lively nature greatly enhance the, and develop
a drift. This happened in the internal structure of membrane layer caused confusion,
coating began to aging. In the long run, the high temperature condition, membrane
layer can fall off, thereby affecting the vacuum tube heat efficiency and life integrating.
Interference membrane, its absorbing layer altogether 2 layer, among two layer
membranes, because the metal content between the different and interfere ratio
effect, make absorption ratio increase, launch ratio decrease. Plus effect of reduce
emission from minus reverse layer, thus achieve more higher absorptance and
reducing the role of launch ,greatly improved collection thermal efficiency.
2.Features: Absorptance of three high efficiency solar vacuum tube increased by
12%, and launch reduced by 30 to 40 percent, the super absorbing, heat loss less,
warming faster. Efficient tube, the super absorbing, thermal efficiency is high,
warming faster, in the same light conditions, can create more and higher temperature
water than common tubes ; high cold tube, copper ions for the launch of aluminum ion
mantua, so low 0.2 thermal loss rarely, in high cold environment can still work normally.
hot water turn out as usual under 30 ºC below zere. high temperature special efficiency tube, because the membrane layer stainless
steel ion high temperature resistant, fight air drying. Membrane layer under the condition
of the 400 ºC, not attenuation, not aging, discoloration.
In the same light conditions, ordinary tube heat absorption is lower than three high
efficiency solar vacuum tube, can't even meet requirements that wash bath;
In lower temperature, heat loss is bigger, collection hot effect is reduced, affect the
normal use; Especially in the empty sun over 270 ºC, membrane layer began to aging,
fall off, absorption rate drastically reduce, life shortens greatly.
Feature:
Three kind of solar collector:
1.Common :evacuated collector tubes.
2. High-efficiency: Three-target evacuated collector tubes: blue and black-golden
3. High-efficiency: Three-target evacuated collector tubes: dark-blue,purple-golden (purple and golden)
Solar evacuated collector tubes technical data:
Dimension |
Φ47 |
Φ58 |
Material of tubes |
3.3 high borosilicate |
3.3 high borosilicate |
Glass expansion ratio |
3.3±0.1X10-6 k-1 |
3.3±0.1X10-6 k-1 |
Outer diameter of tubes |
Φ47±0.7 |
Φ58±0.7 |
Inner diameter of tubes |
Φ37±0.7 |
Φ47±0.7 |
Thickness of glass |
1.6±0.15 |
1.6±0.15 |
Transmittance |
≥0.89 |
≥0.89 |
Selective coating |
SS-CU-AL-N/AL |
SS-CU-AL-N/AL |
Adsorptivity |
≥0.86(AM1.5) |
≥0.86(AM1.5) |
Emissivity |
≤0.080(80±5) |
≤0.080(80±5) |
Vacuum degree |
≤5.0 X 10-3Pa |
≤5.0 X 10-3Pa |
Collecting performance under sunshine |
≥190m2/kw |
≥190m2/kw |
Hailstone resistance |
25mm |
25mm |
Start up fast and collect solar energy fully
Unique super pure copper surface,allowing lower reflection and minimal heat loss.
High level vacuum ensure operation under cold weather.
Long time warranty to 15 years
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