| Structure |
All-glass double-tube co-axial structure |
| Glass material |
High borosilicate 3.3 glass |
| External pipe diameter and thickness |
1500/47 Ф=47±0.4mm L=1500mm±2mm |
| 1800/58 Ф=58±0.4mm L=1800mm±3mm |
| |
| Absorptive coating property |
Structure |
AL/AL-ALN(H)/AL-ALN(L)/ALN |
| Sediment |
Single target magnertron sputtering plating |
| Sbsorption |
As=0.92-0.95(AM1.5) |
| Emission ratio |
Eh=0.04-0.06 |
| Vacuum tightness |
P≦5.0*10-3(Pa) |
| Idle sunning property parameters |
Y=220-260m2.℃/KW |
| Solar irradiation for obtaining a preset water temperature |
H≦3.7MJ/m2(Ф47 |
H=3.1-3.4MJ/m2 |
| H≦4.7MJ/m2(Ф58) |
H=4.1-4.4MJ/m2 |
| Average heat loss coefficient |
ULT=0.6-0.7W/(m2.℃) |
