This listing includes:10 units of vacuum tubes (or evacuated tube) for solar,high performance.

Length of tube:500mm

Application:they can used for the demo solar collector, demo solar water heater, or other DIY solar hot water heating system. Get the energy from the SUN.

Remark: the tubes are fragile, we will ship to you via Express.

(if tubes broken, we will ship to you again or refund to you, no worries)

 

Description:

Just like an automobile engine, the computer CPU, evacuated tube is core of the solar water heater.

Its similar to a conventional Dewar flask and consists of two borosilicate glass tubes, resisting to high chemical and thermal shock. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to avoid heat loss in conduction and conversion.

Evacuated tubes are aligned in parallel; the angle of mounting depends upon the latitude of your location. In a North South orientation the tubes can passively track heat from the sun all day. In an East West orientation they cantrack the sun all year round.

The efficiency of an evacuated water heater is dependent upon a number of factors, one important one being the level of evacuated radiation in your region.

Basic Specifications of Three Target Glass Vacuum Tube