Just like an automobile engine, the computer CPU, evacuated tube is the core component of the solar water heater. Its performance lies on the actual film coating technology. ZJTEX Company adopted a new graded coating technology of Qinghua University, and tube raise the heat.

 

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)
Absorbing coating properties	Configuration	1200(±5mm) 　1500(±5mm) 1700-1800(±5mm) 2000( ±5mm)
	Mothod to deposition	AL-N/A1 selective absorptive coating
	absorptance	as 0.88-0.93
	Remittance	Σn:-.08-0.04
Evacuated		p ≤ 2 × 10-3 PA
Stagnation parameter		＞250M2C/KW
Sloar rediance exposure for obtaining a preset water temperature		＜2.8MJ/M2
Average heat loss coefficient		＜0.8W(M2C)
Lifetime		15years