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newfriend vacuum tubes

Product information

Newfriend Vacuum tube:All-glass evacuated solar collector tubes

High heat-collecting effciency:The vacuum magnetic- controlled sputtered aluminum nitrogenaluminum selective absorption coating has a solar absorptance≥0.93,a heat emittance≤ 6%,a low heat loss,and a good thermal-retention effect.

Good weather-resistance:It has a good all-year thermal efficiency and is able to withstand the front impact by the hail of a diameter below 25mm and a pressure 0.6MPa.
Long service life:ensures a service life of 15 years for the evacuated tube.

Properties of all-glass evacuated solar collector tubes

 Item

 Measured value

 Specification in Chinese state standard

ptance of the solar selective absorbing coatings

 α≥0.931

α≥0.86(AM1.5) 

Hemisphere emittance 

ε≤0.06

ε≤0.09(80±5℃)

Solar radiance exposure using sun as medium

H≤ 2.639MJ/m2

H≤ 3.8MJ/m2

ation parameter using air as medium

Y≥240m2.℃ /Kw

Y≥175m2.℃ /Kw

 Average heat loss coefficient

ULT≤ 0.78W/m2.℃ 

 ULT≤ 0.9W/m2.℃



Model

 Outer diameter/inner diameter(mm)

Length(mm)

 Package

1

58/47 

2000

Carton

2

58/47

1800

Carton

3

58/47

1500

Carton

4

47/37

1200

Carton

5

47/37

1500

Carton

6

47/37

1800

Carton

7

47/37

1900

Carton



◆ Three target vacuum pipe

New intervene film technology:utilize copper, aluminum and titanium three target film technology.

High heat efficiency: 12% higher than common vacuum pipe Anti aging and attenuation: common vacuum pipe will be aged and attenuated in high temperature and shining condition (250℃).Three target vacuum pipe can bear 400℃, the life of the pipe is extended greatly.

Excellent heat preservation feature: Three target vacuum pipe utilize super fine copper mirror, hot water is available in not under minus 30 ℃ condition. The inner pipe cleaning and gas discharge has strictt procedure, vacuum layer is pure without impurity. Vacuum degtrr is high and heat loss is 65%. less than common vacuum pipe,frost crack will never happen.


newfriend vacuum tube
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