double vacuum tube in solar water heater

1.three target coating film
2.collector diamter bigger
3.high temperature
4.15 years warranty

This is double vacuum tube
works priciple:
1.Heat pipe heat section, the working fluid tube from the outside heat source to obtain latent heat of vaporization;
2.As the tube heating section and the pressure difference between the steam condenser section move to the condenser section ;
3.In the

condenser section, the steam tube released latent heat of condensation away from the external cold medium, the steam condenses into a liquid by gravity back evaporator
4.Condensation of liquid smoke floating in the liquid core under the effect of re-heating vaporization reciprocating motion.
in 2011 new design
The Superiority:
1.starting
fast, heat pipe heat capacity is small, quick reaction, the heat collector tube can bequickly obtained to pass into the tank
2. Gain heat very high dual vacuum tube to obtain almost all the heat used to heat the thermal storage tank for heating the water, so water tanks too high heat.
3.high pressure

heat pipe tube seals, can withstand greater pressure can be directly connected with the water system, pressure to use, automatic operation
4.dual

vacuum tube does not take the water, even if the individual tube rupture accident,water heater still running
5.Frost

the vacuum tube in water, even in cold conditions, the cracking will not be happen
6. Dual vacuum diode heat pipe with thermal heat conduction one-way function, that does not work when the heat pipe and tank insulation
The detail of double vacuum tube:
Tube structure
Borosilicate 3.3 glass
External pipe diameter and thickness
Φ=47±0.7mm &=1.6mm
Φ=58±0.7mm &=1.6mm
Φ=70±0.7mm &=1.6mm
Internal pipe diameter and thickness
Φ=37±0.7mm &=1.6mm
Φ=47±0.7mm &=1.6mm
Φ=58±0.7mm &=1.6mm
Tube lenghth
from 1.2 to 2.1
Sediment method
Three-Targets magnetron sputtering plating
Absorptivity
0.93-0.96(AM1.5)
Emittance
<=6%(75-80°C)
Stagnation parameter
>=200
Average heat loss
<=0.6

1, Vacuum tube is consists of two layer of glass tubes
2, ISO900:2000, CE certificate;
3, 0.91 transmittance of outer tube
4, The outer tube is made of extremely strong transparent quartz sand which can resist impact from hail up to 25mm in diameter.
5, The inner tube is also made of quartz sand, but it is coated with a special selective coating with strong heat absorption and lowest heat loss.
6, The air is evacuated from the space between the two glass tubes to form a vacuum, so it eliminates heat loss.
7, This why the tubes are able to absorb the energy from infrared rays which can pass through clouds.

packing:packed by carton with PE fom insinde ,Prevent damage the product.
the outer Glass Tube Diameter:47 the length is :1.2--2.1m could packing with 15\18\20\24pieces/carton
the outer Glass Tube Diameter:58/70 the length is:1.2--2.1m could paking with 8/10/12/15 pieces/carton or packing as you need