solar evacuated heat pipe tube the core part of solar water heater system adopt the high quanlity tube and coating tech

solar evacuated heat pipe tubethe core part of solar water heater systemadopt the high quanlity tube and coating tech

Structure					All-glass double-tube co-axial structure
Glass material					High borosilicate 3.3 glass
External pipe diameter and thickness					Φ=47±0.7mm &=1.6mm  Φ=58±0.7mm &=1.6mmΦ=70±0.7mm &=2.0mm
Internal pipe diameter and thickness					Φ=37±0.7mm &=1.6mm  Φ=47±0.7mm &=1.6mm Φ=58±0.7mm &=2.0mm
Pipe length					800mm 1200mm 1500mm 1600mm                      1800mm 1900mm 2000mm 2100mm
Absorbing  coating property		structure			Cu/SS-ALN(H)/SS-ALN(L)/ALN
		sediment method			Three target magnertron sputtering plating
		Absorption ratio			a=0.93~0.96(AM1.5)
		Emmision ratio			ε=0.04~0.06(80±5)
Vacuum tightness					P≤5.0X10-3Pa
Average heat loss coefficient					ULT=0.4~0.6W/(m2.)
Hail resistance					Φ=25mm

solar evacuated heat pipe tube