both open vacuum tube

Specification

tructure

Two concentric borosilicate glass tubes

Material

Borosilicate glass 3.3

Outer tube diameter

Φ47±0.7mm  &=1.6mm

Φ58±0.7mm  &=1.6mm

Inner tube diameter

Φ37±0.7mm  &=1.6mm

Φ47±0.7mm  &=1.6mm

Length

47-1500mm/1600mm/1800mm

58-1500mm/1600mm/1800mm/2000mm/2100mm

Coating

SS-C/Cu

(双靶)

Solar absorption efficiency

     0.80-0.90（AM1.5）

Launch ratio

     0.04~0.06（80℃±5℃）

Vacuum degree

P≤5.0×10-3 (Pa)

Max stagnation temperature

Y=260~300㎡C/KM

Average heat loss coefficient

ULT= 0.4~0.6w/(㎡.℃)

Resistance performance

Hail diameter≤ 25mm

Solar irradiation for obtaining a preset water temperature rise in an all-glass evacuated solar collector tube under stagnation

H=3.7~4.2 MJ/㎡(47 /58mm)