Product Details

Glass tubw solar water heater heat pipe vacuum tubes

& Manufacturing

1.Vacuum tube feature:

The kind of vacuum tube assimilate the advanced 12 layers of spattering deposition of trivalent element technology, high quality borosilicate glass 3.3, gradual change of CU-SS-ALN/ALN selective absorption coating and make vacuum tubes have high performance of absorptance and low reflection ratio. Through interlayer, vacuum has a unique effect of thermal, with its temperature up to 380 degree of idle sunning, performing a strong ability.

2. Vacuum tube specification:

47-1500MM, 58-1800MM (Standard specification)

47-1800MM, 58-2000MM (optional specification)

3. Vacuum tube Loading quantity in container:

47-1500MM, 4700 PCS/20ft, 9600 PCS/40ft.

58-1800MM, 2860 PCS/20ft, 6600 PCS/40ft

Specification:
Structure	All-glass double-tube co-axial structure
Glass material	High borosilicate 3.3 glass
External pipe diameter and thickness	dia.=47±0.7mm &=1.6mm dia.=58±0.7mm &=1.6mm
	dia.=70±0.7mm &=2.0mm
Internal pipe diameter and thickness	dia.=37±0.7mm &=1.6mm dia.=47±0.7mm &=1.6mm
	dia.=58±0.7mm &=1.6mm
Pipe length	1500mm 1600mm 1700mm 1800mm1900mm 2000mm
Absorptive coating property	Structure	AL/AL-ALN(H)/AL-ALN(L)/ALN
	Sediment method	Single target magnetron sputtering plating
	Specific absorption	as=0.88~0.91(AM1.5)
	Emission ratio	0.05~0.075(80°C±5°C)
Vacuum tightness	P≤5.0×10-³Pa
Idle sunning property parameters	Y= 220 ~ 260m²°C/KW
Solar irradiation for obtaining a preset water temperature	H≤4.7 MJ/ m²	H=4.1~4.4 MJ/ m²
	H≤3.7 MJ/ m²	H=3.1~3.4 MJ/ m²
Average heat loss coefficient	Ult=0.6~0.7W/( m².°C)

Vacuum tube showing:

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