three high vacuum tube

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

three high vacuum tube

Structure: All-glass double-tube co-axial structure

Glass material: High borosilicate 3.3 glass

 External pipe diameter and thickness: Φ=47±0.7mm &=1.6mm  Φ=58±0.7mm &=1.6mm  Φ=70±0.7mm &=2.0mm

Internal pipe diameter and thickness: Φ=37±0.7mm &=1.6mm  Φ=47±0.7mm &=1.6mm  Φ=58±0.7mm &=2.0mm

Pipe length: 800mm    1200mm  1500mm  1600mm  1800mm  1900mm  2000mm  2100mm

Absorbing coating property:

                     Structure:  Cu/SS-ALN(H)/SS-ALN(L)/ALN

                     Sediment method: 3 target magnertron sputtering plation

                      Specific absorption: as=0.93~0.96(AM1.5)    εh=0.04~0.06(80±5)

 Vacuum tightness: P≤5.0X10-3Pa

 Idle sunning property parameters:  Y=260~300m2./KW

Solar irradiation for obtaining a preset water temperature:

                           H≤4.7MJ/m2(Φ58)    H=3.7~4.2MJ/m2

                                         H≤3.7MJ/m2(Φ47)    H=2.9~3.2MJ/m2

Average heat loss coefficient: ULT=0.4~0.6W/(m2.)

three high vacuum tube