solar tube

solar tube high effecient heat pipe solar tubes high effecient and less heat loss stable coa

solar tube

Features of solar evacuated tubes:

Standard: high quality

Diameter of the outer tube and length of the tube: Φ47/1500, Φ47/1800, Φ58/1800, Φ58/2000, Φ58/2100(mm)

Material of the glass: borosilicate 3.3 glass

Film-coating technology: patented interference technology

Material of coating: Cu/SS-ALN(H)/SS-ALN(L)/ALN   AL/AL-ALN(H)/AL-ALN(L)/ALN

Absorptance:0.94~0.96

Emittance:0.04~0.06

Vacuum rate: 5*10¯3pa

Bearing hailstone ability: hailstone diameter 25mm

Pressure-endure ability: 1MPa

Description:

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.

The characteristics:

1. High solar-thermal conversion and low heat loss

2. Stable advanced coating up to 380 degree centigrade

3. Long time warranty to 15 years

4. High level vacuum ensure operation under cold weather

solar tube