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Contact Person : Mr. Lee Youto
Company Name : Haining Haoguang Solar Industrial Co., Ltd.
Tel : 86-573-87888088
Fax : 86-573-87888806
Address : Zhejiang,email us :<hnvacuumtube(at)hotmail.com>,changxiao village, yuanhua town,hainingcity (solartubes At gmail Dot com)
Country/Region : China
Zip : 314416

Haoguang three cavity vacuum heat collecting tube

Product Detailed

1)material:borosilicate 3.3 glass 2)Strong heat collection; 3)low emission 4)Long life Min. order:1000 pieces

The three cavity vacuum heat collecting property and specification is as follows

Structure		All-glass concentric dual tube geomer
Glass material		Borosilicate glass
Outer tube diameter and thickness		Φ=47±0.7mm & =1.5mm Φ=58±0.7mm & =2mm Φ=70±0.7mm & =2mm
Inter tube diameter and thickness		Φ=37±0.7mm & =1.5mm Φ=47±0.7mm & =1.6mm Φ=58±0.7mm & =1.6mm
Tube Length		1200(±5mm)1500(±5mm)1700-1800(±5mm)2000(±5mm)
Absorbingcoatingproperties	Configulation	1200(±5mm) 1500(±5mm)1700-1800(±5mm)2000( ±5mm)
	Method to deposition	Graded A1-N/A1 solar selectuve absorbing coating
	absorptance	as 0.88-0.93
	Emittance	Σn:-.08-0.04
Vacuum		p ≤ 2 × 10-3
Stagnation parameter		250M2C/KW
Solar radiance exposure for obtaining a preset water temperature		2.8MJ/M2
Average heat loss coefficient		0.8W(M2C)
Lifetime		15years

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