solar vacuum tube BG471800
1.best price&high quality
2.3 years warranty for free
3.CE/CCC certificated
4.cu/ss/al coated
solar vacuum tube three target BG471800
1.best price&high quality
2.3 years warranty for free
3.CE/CCC certificated
4.cu/ss/al coated
solar vacuum tube three target BG471800
| Structure | All-glass double-tube co-axial structure | ||
| Glass material | High borosilicate 3.3 glass | ||
| External pipe diameter and thickness | dia.=47mm &=1.6mm dia.=58mm &=1.6mm | ||
| dia.=70mm &=2.0mm | |||
| Internal pipe diameter and thickness | dia.=37mm &=1.6mm dia.=47mm &=1.6mm | ||
| dia.=58mm &=1.6mm | |||
| Pipe length | 1500mm 1600mm 1700mm 1800mm 1900mm 2000mm | ||
| Absorptive | Structure | Cu/SS-ALN(H)/SS-ALN(L)/ALN | |
| coating property | Sediment method | 3 target magnetron sputtering plating | |
| Specific absorption | as=0.90~0.93(AM1.5) | ||
| Emission ratio | 0.05~0.075(80°C±5°C) | ||
| Vacuum tightness | P≤5.0×10-³Pa | ||
| Idle sunning property parameters | Y= 260 ~ 300m²°C/KW | ||
| Solar irradiation for obtaining a preset water temperature | H≤4.7 MJ/ m²(dia.58) | H=3.7~4.2 MJ/ m² | |
| H≤3.7 MJ/ m²(dia.47) | H=2.9~3.2 MJ/ m² | ||
| Average heat loss coefficient | Ult=0.4~0.6W/( m².°C) | ||