Structure

All-glass Concentric Dual Tube Geometer

Glass Material

Borosilicate Glass

Out Tube Diameter and Thickness

φ47  0.7mm & - 1.5mm
φ58  0.7mm & - 2.0mm
φ70  0.7mm & - 2.0mm

Inner Tube Diameter and Thickness

φ37  0.7mm & - 1.5mm
φ47  0.7mm & - 1.6mm

Tube Length

1200(±5mm)
1500(±5mm)
1700(±5mm)
2000(±5mm)

Absorbing Coating Properties

Construction

Graded Al-N/Al Solar Selective Absorbing Coating

Method to Deposition

DC Reactive Sputtering

Absorbance

91%

Emittance

8%(80)

Vacuum

P5×10^-3Pa

Stagnation Parameter

-230M²/KW

Solar Radiance Exposure for Obtaining a preset water temperature

-2.8MJ/ M²

Average Heat Loss Coefficient

-0.8W/ M²

Lifetime

15 Years