solar energy

solar energy
collector with heat pipe
CCC,CE,ISO,KEYMARK
Solar energy:
Heat Pipe Vacuum Tube Technical specification
Material: borosilicate glass according to ISO3585:1991
Transmittance of borosilicate glass: 0.92
Absorbance of solar selective absorptive coating: 0.94
Hemispherical remittance: 0.08
Getter: according to GB/T9505-1998
Copper Heater pipe: φ8×0.8×1500 or φ8×0.8×1800
Start-up temperature: no more than 25
Start-up time: no longer than 2 minutes under normal sunshine.
Low temperature resistance: no breaks at -30
Heat impact resistance: no damages after over 3 times' alternative impacts of cold water below 25 and hot water over 90.
Pressure resistance: can withstand 0.6Mpa
Hail resistance: no damage by the impact of Φ25mm hail