الوصف

All-glass Evacuated Solar Collector Tube Length ***0mm ***0mm Outer tube diameter *7mm *8mm Inner tube diameter *7mm *7mm Weight 1.3kg 2.2kg Glass thickness 1.6mm 1.6mm Material Borosilicate Glass 3.3 Borosilicate Glass 3.3 Absorptive coating Graded A1/N/A1 Graded A1/N/A1 Vacuum degree P<5**0 *3 Pa P<5**0 *3 Pa Thermal expansion 3.3**0 *6 /°C 3.3**0 *6 /°C Insolation Temperature >**0°C >**0°C Absorptance >*3% >*3% Emittance <8% <8% Heat loss <0.8W/(m2°C) <0.8W/(m2°C) Maximum strength 0.8Mpa 0.8Mpa Resist cold **5 °C **5 °C Resist hailstone Ø *5mm Ø *5mm Resist wind *0m/s *0m/s Start-up temperature <=*5°C <=*5°C