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Solar Heater Glass Vacuum Tube

Solar Heater Glass Vacuum Tube

Product Description
The evacuated tube is a key component of solar water heater. It determines the performance and efficiency of the heater. Kaidun all-glass vacuum tube is made of dual borosilicate glass tubes, and the space between the two tubes is evacuated. The AL/N/AL selective coating on the outer wall of the inner tube absorbs sunlight and transforms it into heat, which in turn heats the cold water in the inner tube.

When the water in the solar vacuum tube is heated, its density decreases and it goes upward into the tank; meanwhile, the cold water in the tank flows down into the evacuated glass tube due to its greater density. Thus, water circulation and heat exchange are realized.

With the black-grey inner wall, the solar heater glass vacuum tube offers high heat efficiency and is economically priced. It is suitable for use in areas with temperatures above -20℃ in winter.

Specification
1. Structure: all glass concentric dual layer tube
2. Glass material: borosilicate
3. Absorption rate: >0.90
4. Emittance: <0.08 (80℃)
5. Vacuum: <5×10-5 Pa
6. Stagnation: >230 m2·℃/kW
7. Average heat loss: <0.8 W/m2·℃
8. Service life: more than 15 years

Technical Data of KD-VT-AG Solar Heater Glass Vacuum Tube

Models Material Diameter Length Coating Vacuum Hail resistance Transmittance
KD - VT - AG 47/1500 borosilicate 47 mm 1500 mm AL / N / AL ≤5 x 10-5 Ø 25 mm 0.91
KD - VT - AG 47/1800 borosilicate 47 mm 1800 mm AL / N / AL ≤5 x 10-5 Ø 25 mm 0.91
KD - VT - AG 58/1800 borosilicate 58 mm 1800 mm AL / N / AL ≤5 x 10-5 Ø 25 mm 0.92
KD - VT - AG 58/2100 borosilicate 58 mm 2100 mm AL / N / AL ≤5 x 10-5 Ø 25 mm 0.91

We are a professional solar heater glass vacuum tube manufacturer in China. At Kaisundun we also provide solar heater heat pipe vacuum tube, solar heater expansion vessel, solar water heater, solar central heating system, heat pipe solar collector, and solar panel.

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