Solar Evacuated Tubes For Sale

Specifications

Solar Evacuated Tubes For Sale
1)For 15 years warranty
2)2% FREE SPARE PARTS
3)Sample offer
4)OEM service

Working Principle Of Solar Evacuated Tubes For Sale:

Tri-target solar vacuum tube, connecting with water tank or manifold, when it works, cold water flows down into the vacuum tube, and there it is heated with solar energy absorbed by the coating outside of inner vacuum tube, the solar will be absorbed efficiently by the coating with little loss of heat because of the vacuum between the inner and outer glass tubes, and when cold water becomes hot, hot water will rise up to water tank or manifold because of the larger proportion to cold water, cold water again flows into solar vacuum tube for another heating process.

                                             

 

1, Vacuum tube is consists of two layer of glass tubes

2, 0.91 transmittance of outer tube.

3, The outer tube is made of extremely strong transparent quartz sand which can resist impact from hail up to 25mm in diameter.

4, 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.

5, The air is evacuated from the space between the two glass tubes to form a vacuum, so it  eliminates heat loss.

6, This why the tubes are able to absorb the energy from infrared rays which can pass through clouds.

7, So it also can operate in low temperature and low sunlight medium.

 

Solar tube tec SEP:

Model	Three-target solar vacuum tube	Single-target vacuum tube
Structure	All-glass double-tube co-axial structure
Glass material	High borosilicate 3.3 glass
Diameter x length	47x1500mm,1.6mm thickness, inner tube diameter:37mm
	58x1800mm,1.6mm thicnkess, inner tube diameter:47mm
	70x2000mm,2.0mm thickness,inner tube diameter:58mm
Structure	Cu/SS-ALN(H)/SS-ALN(L)ALN	AL/AL-ALN(H)AL-ALN(L)/ALN
Sediment method	Three target magnetron sputtering plating	Single target magnetron sputtering plating
Specific absorption	93%-96%(AM1.5)	90%-93%(AM1.5)
Emission ratio	0.04-0.06(80C+-5C)	0.05-0.075(80C+-5C)
Vacuum tightness	<=5.0x10 -3Pa	<=5.0x10-3Pa
Idle suning property parameters 260-300m2.C/KW
Heat-loss coefficient	0.4-0.6W/(m2.C)	0.6-0.7 W/(m2.C)
Preeure-endure ability	0.6Mpa
Thermal expansion	3.3x10-6K

 

Comparing to Al-N-Al vacuum tube, three target has advantages in cold area as following:

a. Absorbance: 12% higher.

b. Emission Ration: 30-49% lower.

c. In alpine area, copper ions emission ration is lower than that of aluminum ion. So it could work properly even circumstance temp. is lower than -30Deg C.

d. Stainless steel ion has performance of high temp. resistant, anti-stagnation temp. coating will not decay or get aging or disappears.

Dia. 47 with length of 1500mm.

Dia. 58 with length of 1500mm.

Dia. 58 with length of 1600mm

 

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