New technology:

 

Our vacuum tubes are produced according to two new patents.

■ Improved photothermal efficiency
■ Stable coating up to 380°
■ Improved vacuum level
■ Uniform and color stable

Other advantages of the dewar flask construction:

■ Easy for OEM customers to produce their own high quality collectors
■ Proven technology
■ Reliable product
■ Environmental friendly
■ Easy to recycle
■ No glass to metal seals

Structure:
Features:
  • High solar-thermal conversion and low heat loss
  • Stable advanced coating up to 380℃
  • Long time warranty to 15 years
  • 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

Ф47×150

Ф58×180

Ф58×192

Ф58×210

Weight

1.35±0.12kg

2.29±0.18kg

2.45±0.20kg

2.67±0.22kg

Structure

All glass coaxial double-layer tubes

All glass coaxial double-layer tubes

All glass coaxial double-layer tubes

All glass coaxial double-layer tubes

Outer tube diameter

Ф47±0.7mm

Ф58±0.7mm

Ф58±0.7mm

Ф58±0.7mm

Inner tube diameter

Ф37±0.7mm

Ф47±0.7mm

Ф47±0.7mm

Ф47±0.7mm

Outer Tube thickness

1.6±0.15mm

1.8±0.15mm

1.8±0.15mm

1.8±0.15mm

Inner tube thickness

1.6±0.15mm

1.6±0.15mm

1.6±0.15mm

1.6±0.15mm

Tubes length

1542±4mm

1812±4mm

1932±4mm

2100±4mm

Material of coating

 AlN/AIN-SS/Cu AlN/AIN-SS/CU AlN/AIN-SS/CU

AlN/AIN-SS/CU

Absorptance

0.94~0.96

0.94~0.96

0.94~0.96

0.94~0.96

Emittance

0.04~0.06

0.04~0.06

0.04~0.06

0.04~0.06

Vacuum

P≤5×10-3pa

P≤5×10-3pa

P≤5×10-3pa

P≤5×10-3pa

Transmittance of Outer Tube

0.91

0.91

0.91

0.91

Stagnation temperature (height)

270~300℃

270~300℃

270~300℃

270~300℃

Heat-loss coefficient

≤0.6w/ m2*℃)

≤0.6 w/ (m2*℃)

≤0.6 w/ (m2*℃)

≤0.6 w/ (m2*℃)

Bearing hailstone ability

hailstone diameterФ25mm

hailstone diameterФ25mm

hailstone diameterФ25mm

hailstone diameterФ25mm

Pressure-endure ability

1MPa

1MPa

1MPa

1MPa
     
 

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