Changzhou Imposol New Energy Co., Ltd.
Main products:Solar water heater, Solar collector
Products
Contact Us
  • Contact Person : Mr. Skype Tomas
  • Company Name : Changzhou Imposol New Energy Co., Ltd.
  • Tel : 86-519-68880956,83251620
  • Fax : 86-519-68880200
  • Address : Jiangsu,changzhou,No.5 shengda road,luoxi yown,xinbei district,changzhou city ,jiangsu province ,china
  • Country/Region : China
  • Zip : 21300

common vacuum tube

common vacuum tube
Product Detailed
common vacuum tube

common vacuum tube

All glass evacuated tubes are the key component of solar collectors. The evacuated tube is similar to a conventional Dewar flask and consists of two borosilicate glass tubes, a glass with high chemical and thermal shock resistance. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection.Deosun successfully developed the innovative Advanced Solar Selective Coatings in commercial scale, which achieve the highest thermal efficiency and good thermal stability. Solar selective coatings absorb most solar radiation while simultaneously suppressing the thermal emittance loss from coating surfaces. They vary mainly in their optical property and thermal stability. Excellent results have been obtained by using DC magnetron sputtering technology. A solar absorptance of 0.94 - 0.96 with an emittance of 0.04 - 0.06 at 100 oC has been achieved.

Features: 1.High solar-thermal conversion and low heat loss 2.Stable advanced coating up to 380 3.Long time warranty to 15 years 4.High level vacuum ensure operation under cold weather Advanced solar selective coatings Advanced solar selective coatings employ two patent technologies : (1) double cermet film structure with the highest photothermal efficiency (2) metal-Aluminum nitride cermet (M-AlN) materials deposited by a novel sputtering technology. The typical film structure of M-AlN cermet selective surfaces

Models

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* )

≤0.6 w/ (m2* )

Bearing hailstone ability

hailstone diameter25mm

hailstone diameter25mm

Pressure-endure ability

1MPa

1MPa

common vacuum tube



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