1Vacuum tube
2 CE,SRCC,ISO,SK
3 Elaborated designing
4 SS-CU-ALN/AL
5 three target coating heat pipe
vacuum tube solar water heater
Structure | All-glass double-tube co-axial structure | |
Glass material | High borosilicate 3.3 glass | |
External pip diameter and thickness | Φ=47±1.0mm§=1.6mm±0.2mm Φ=58±1.0mm§=1.8mm±0.2mm Φ=70±1.5mm§=2.2mm±0.3mm | |
Internal pip diameter and thickness | Φ=37±0.8mm§=1.4mm±0.2mm Φ=47±1.0mm§=1.6mm±0.2mm Φ=58±1.0mm§=1.8mm±0.2mm | |
Pipe length | 950mm 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 | As =0.93~0.96 (AM1.5) | |
Emission ratio | εh =0.04~0.06 (80±5) | |
Vacuum tightness | P≤5.0×10-3Pa | |
Idle sunning property parameters | Y=260~300 m2.C/KW | |
Solar irradiation for obtaining a preset water temperature | H≤4.7MJ/m2(Φ58) | H=3.7~4.2 MJ/m2 |
H≤3.7MJ/m2(Φ47) | H=2.9~3.2 MJ/m2 | |
Average heat loss coefficient | ULT=0.4~0.6W/(m2.) |