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Normal all glass vacuum tube
Specification: | ||||||
Structure | All-glass double-tube co-axial structure | |||||
Glass material | High borosilicate 3.3 glass | |||||
External pipe diameter and thickness | dia.=47±0.7mm &=1.6mm dia.=58±0.7mm &=1.6mm | |||||
dia.=70±0.7mm &=2.0mm | ||||||
Internal pipe diameter and thickness | dia.=37±0.7mm &=1.6mm dia.=47±0.7mm &=1.6mm | |||||
dia.=58±0.7mm &=1.6mm | ||||||
Pipe length | 1500mm 1600mm 1700mm 1800mm1900mm 2000mm | |||||
Absorptive coating property | Structure | AL/AL-ALN(H)/AL-ALN(L)/ALN | ||||
Sediment method | Single target magnetron sputtering plating | |||||
Specific absorption | as=0.88~0.91(AM1.5) | |||||
Emission ratio | 0.05~0.075(80°C±5°C) | |||||
Vacuum tightness | P≤5.0×10-³Pa | |||||
Idle sunning property parameters | Y= 220 ~ 260m²°C/KW | |||||
Solar irradiation for obtaining a preset water temperature | H≤4.7 MJ/ m² | H=4.1~4.4 MJ/ m² | ||||
H≤3.7 MJ/ m² | H=3.1~3.4 MJ/ m² | |||||
Average heat loss coefficient | Ult=0.6~0.7W/( m².°C) |
Certificate:
High borosilicate 3.3 glass tube for solar vacuum tubes:
Technological process:
Workshop:
Packing :
Main Advantages of solar vacuum Tubes:
1.No scaling2.No blasting3.water-tight4.Anti aging.5.low temperature-resistant.
Solar Evacuated solar collector tube