Sell glass vacuum tube

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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 outertube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection. Himin evacuated collector tubes are produced according to two new patents from the Sydney University exclusively licensed to our company.




The characteristics:
1. High solar-thermal conversion and low heat loss
2. Stable advanced coating up to 3800
3. Long time warranty to 15 years
4. High level vacuum ensure operation under cold weather


Models
#47W1800
#58W1800
#58W1920
#58W2100

Weight
1.7310.12kg
2.2910.18kg
2.4510.20kg
2.6710.22kg

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
#4710.7mm
#5810.7mm
#5810.7mm
#5810.7mm

Inner tube diameter
#3710.7mm
#4710.7mm
#4710.7mm
#4710.7mm

Outer Tube thickness
1.610.15mm
1.810.15mm
1.810.15mm
1.810.15mm

Inner tube thickness
1.610.15mm
1.610.15mm
1.610.15mm
1.610.15mm

Tubes length
180515mm
180515mm
192515mm
210015mm

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<=5W10-3pa
P<=5W10-3pa
P<=5W10-3pa
P<=5W10-3pa

Transmittance of Outer Tube
0.91
0.91
0.91
0.91

Stagnation temperature (height)
270~3000
270~3000
270~3000
270~3000

Heat-loss coefficient
<=0.6w/ m2*0)
<=0.6 w/ (m2*0)
<=0.6 w/ (m2*0)
<=0.6 w/ (m2*0)

Bearing hailstone ability
hailstone diameter#25mm
hailstone diameter#25mm
hailstone diameter#25mm
hailstone diameter#25mm

Pressure-endure ability
1MPa
1MPa
1MPa
1MPa