Three-target coating tubes

Three-target all-glass vacuum heat collection tube property and specification
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 &=1.6mm
Pipe length: 500mm 850mm 1200mm 1500mm 1600mm 1700mm 1800mm 1900mm 2000mm 2100mm
Absorptive coating property Structure Cu/SS-ALN(H)/SS-ALN(L)/ALN
Sediment method: 3 target magnetron sputtering plating
Specific absorption; 0.93~0.96(AM1.5)
Emission ratio: 0.04~0.06(80° C± 5° C)
Vacuum tightness: 5.0× 10-3Pa
Idle sunning property parameters: 260~300m² . ° C /KW

Solar irradiation for obtaining a preset water temperature: H≤ 4.7MJ/ m² (Φ 58) H=3.7~4.2MJ/ m²
H≤ 3.7MJ/ m² (Φ 47) H=2.9~3.2MJ/ m²
Average heat loss coefficient: 0.4~0.6W/(m² . ° C)
Resistant Hail: 25mm
Life aged: 15 years