three target solar vacuum tube BBG471800

Model:	47*1800
Brand:	BG-IU1
Origin:	Made In China
Category:	Metallurgy , Mining & Energy / New Energy / Solar Energy
Label:	solar vacuum tube , vacuum tube , solar water heater
Price:	US $1 / pc
Min. Order:	1 pc

Product Description

solar vacuum tube three target BBG471800

Structure	All-glass double-tube co-axial structure
Glass material	High borosilicate 3.3 glass
External pipe diameter and thickness	dia.=47mm &=1.6mm dia.=58mm &=1.6mm
	dia.=70mm &=2.0mm
Internal pipe diameter and thickness	dia.=37mm &=1.6mm dia.=47mm &=1.6mm
	dia.=58mm &=1.6mm
Pipe length	1500mm 1600mm 1700mm 1800mm 1900mm 2000mm
Absorptive	Structure	Cu/SS-ALN(H)/SS-ALN(L)/ALN
coating property	Sediment method	3 target magnetron sputtering plating
	Specific absorption	as=0.90~0.93(AM1.5)
	Emission ratio	0.05~0.075(80°C±5°C)
Vacuum tightness	P≤5.0×10-³Pa
Idle sunning property parameters	Y= 260 ~ 300m²°C/KW
Solar irradiation for obtaining a preset water temperature	H≤4.7 MJ/ m²(dia.58)		H=3.7~4.2 MJ/ m²
	H≤3.7 MJ/ m²(dia.47)		H=2.9~3.2 MJ/ m²
Average heat loss coefficient	Ult=0.4~0.6W/( m².°C)