three-high vacuum tube

Description

Structure: All-glass double-tube co-axial structure; Glass material: High borosilicate 3.3 glass; External pipe diameter : Φ=*7 ;Φ=*8;Φ=*0 Internal pipe diameter and thickness: Φ=*7;Φ=*7;Φ=*8 Pipe length: ***0mm;***0mm;***0mm, ***0mm;***0mm;***0mm;***0mm Absorptive coating property: Structure: CU/SS-ALN(H)/SS-ALN(L)ALN Absorption ratio: As=0.*0~0.*3(AM1.5) Emission ratio: 0.*4~0.*6(*0±5) Vacuum tightness: P≤5x***3 (Pa) Idle sunning property parameters: Y=**0~**0m2 . /KW Solar irradiation for obtaining a preset water temperature: H≤4.7MJ/m2 (Φ*8) H=3.7~4.2 MJ/m2 H≤3.7MJ/m2 (Φ*7) H=2.9~3.2 MJ/m2 Average heat loss coefficient:ULT=0.4~0.6W/( m2 . )