High-grade evacuated tube

Features:

1.High solar-thermal conversion and low heat loss
2.Stable advanced coating up to 380
3.Long time warranty to 15 year

4. High level vacuum ensure operation under cold weather
5. 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

Specifications:

   Model: dia.47mm×1500mm/ dia. 58mm×1800mm

   Structure: All glass coaxial double-layer tubes

   Outer tube diameter: dia.47±0.7mm;/ dia.58±0.7mm

   Inner tube diameter: dia.37±0.7mm;/ dia.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

    Absorptance:0.94~0.96 ;

   Emittance:0.04~0.06

   Vacuum:P≤5×10^-3pa

   Transmittance of Outer Tube:0.91

   Stagnation temperature (height):270-300 celsius degree

   Heat-loss coefficient: ≤0.6w/ m2* celsius degree )

   Bearing hailstone ability:hailstone diameter25mm

   Pressure-endure ability: 1MPa

   Weight: 1.35±0.12kg / 2.29±0.18kg