Four-cavity solar evacuated glass tube

characteristic:four cavity necking technique medium-high temperature solar tube thermal property high efficiency

Advantages of Four-cavity Evacuated Glass Tube

1.The spring holder does not touch the outer tube and the heat transmission through the spring holder is cut off. Its workability is upgraded by 30-35%.

2. The diameter of the EGT is narrowed down at the open end. Two neighbourtubes are much closer to each other. So the aperture area is enlarged and more solar energy can be absorbed

3.. Water temperature rises much faster.

As there is an Interior tube inside, the water in the Four-cavity EGT is 1/5-1/4 less than that in the normal EGT and can be heated up faster. So there is a faster exchange of the cold water and the hot water, producing more hot water.

Model: Φ70/58*1800mm-4      Φ58/40-1800mm-4

Vacuum degree: P≤4.2×10-3(Pa)

Solar absorption efficiency: α=0.91-0.93(AM1.5)

Absorptivity emissivity ratio: εh =0.04-0.06(80°C±5°C)

Temperature of basking without water: Y=260~310 m2 °C / KW

Average heat loss coefficient: :ULT=0.4~0.5W / ( m2°C)

 Impact resistance tests: Φ(diametre)=25mm steel ball impact

This is a very new type of evacuated glass tube,few company can make it. If you are interested,please don’t hesitate to contact.

Four-cavity solar evacuated glass tube