Beijing Logon Sci. & Tech. Deve. Co., Ltd.
Main products:coating machine,ultrasonic cleaning machine,explosion spraying equipment
Products
Contact Us
  • Contact Person : Ms. Chen Sharon
  • Company Name : Beijing Logon Sci. & Tech. Deve. Co., Ltd.
  • Tel : 86-10-62477220
  • Fax : 86-10-62474518
  • Address : Beijing,Beijing,Room B-1409, Sigma Plaza, No. 49 Zhichun Road, Haidian District
  • Country/Region : China
  • Zip : 100086

three high tube

three high tube
Product Detailed
Vacuum tube is an integral part of solar collector. Vacuum tube is the same as the traditional Dewar (vacuum) bottle.

Vacuum tube is an integral part of solar collector. Vacuum tube is the same as the traditional Dewar (vacuum) bottle.it  contains two borosilicate glass tubes. Outer layer of the inner tube coated with solar selective coatings. One end of inner tube connected with the outer tube, the other end sealed with the outer tube. Between Inner tube and outer tube of the annular space is vacuum mode,through the  conduction and convection to reduce the heat loss.

Features: energy transform efficiency, low heat loss the stability of advanced coatings, up to 380 centidegree. 15-year warranty perioda high degree of vacuum in a cold climate to ensure the normal operation.

Model type

47×150

58×180

weight

1.35±0.12kg

2.29±0.18kg

Structure

All glass coaxial double-layer tubes

All glass coaxial double-layer tubes

Outer tube diameter

47±0.7mm

58±0.7mm

Inner tube diameter

37±0.7mm

47±0.7mm

Outer Tube thickness

1.6±0.15mm

1.8±0.15mm

Inner tube thickness

1.6±0.15mm

1.6±0.15mm

Tubes length

1542±4mm

1812±4mm

Material of coating

AlN/AIN-SS/Cu

AlN/AIN-SS/CU

Absorptance

0.94~0.96

0.94~0.96

Emittance

0.04~0.06

0.04~0.06

Vacuum

P≤5×10-3pa

P≤5×10-3pa

Transmittance of Outer Tube

0.91

0.91

Stagnation temperature (height)

270~300

270~300

Heat-loss coefficient

≤0.6w/m2*

≤0.6w/m2*

Bearing hailstone ability

hailstone diameter25

hailstone diameter25

Pressure-endure ability

1MPa

1MPa

three high tube



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