Solar Heater Glass Vacuum Tube

Product Description
The vacuum tube is a key component of solar the water 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 tube is heated, its density decreases and it floats upward into the tank; meanwhile the cold water in the tank flows down into the tube due to its greater density. Thus, water circulation and heat exchange is effected. The color of the inner tube is black-grey. The solar heater glass vacuum tube offers high heat efficiency and is economically priced. It is suitable for use in areas with winter temperatures above –20°C.

Specification
A) Structure: all glass concentric dual layer tube
B) Glass material: borosilicate
C) Absorption rate: >0.90
D) Emittance: <0.08 (80℃)
E) Vacuum: <5x10^-5 Pa
F) Stagnation: >230 ㎡.℃/KW
G) Average heat loss: <0.8 w/ ㎡.℃
H) Service life: more than 15 years

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

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