SFG AIR HEATING SYSTEM

                 SPECIFICATION AND TECHNICAL CHARACTERISTICS OF THE SYSTEM


-Number of vaccum tubes - 15 pieces
-Efective surface- 1.06 m² 
-Carrying construction-chrom plated (Inox)



All-glass Evacuated Solar Collector Tube

-Lenght - 1500 mm
-Outer tube diameter - 47 mm
-Inner tube diameter - 37 mm
-Weight -1.3 kg
-Glass thickness -1.6 mm
-Material - Brosilicate Glass 3.3
-Absorptive coating - P<5x10ˉ² Pa
-Thermal expansion - 3.3X10-6/*C
-Insolation Temperature - > 200 *C
-Absorptance - > 93 %
-Emissivity - < 8%
-Heat loss - <0.8  W (m2*C)
-Maximum pressure - 0.8Mpa
-Resist cold - (-35 )*C
-Resist wind - 30 m/s
-Start-up temperature - < 25 *C