Evacuated Tube Solar Water Heater System

The vacuum tube is an assembly of two concentric borosilicate glass tubes.

Evacuated tube solar water heater system.

The absorber moves energy to the copper heat pipe where energy is stored by the working fluid. Solar water heating systems using vacuum tubes made of borosilicate glass with special coating to absorb the solar energy are called as evacuated tube collector system etc systems. Evacuated tubes from endless solar provide a new level of performance and expectation in the solar water heating industry. A small pump circulates the water from the cylinder through the header across the top of the tubes to absorb the maximum available solar energy.

Modern evacuated tube solar water heaters capture about 94 of the sun s rays. The most modern option for south africans looking for a solar geyser is the evacuated tube solar heating system. How the collectors work. Evacuated tube solar hot water system how it works.

Evacuated tubes are a proven technology now widely accepted in australia all the way from consumers and plumbers right through to the federal. Wet tubes contain water which is directly heated by the sun and transfers the heat straight to the water in the storage tank using thermosyphon. Below is a table that gives a rough indication of the specifications and energy that could be expected from a solar water heating system involving some 2 m 2 of absorber area of the collector demonstrating two evacuated tube and three flat plate solar water heating systems. If you don t use the hot water on this integrated evacuated tube solar water heater it can overheat and vent through the t p valve at 150 psi or 210 degrees.

In terms of the water heater geyser price this collector is a little more expensive. But there s also a decline in the cost as it gains a bigger market share. Vacuum tube as shown in the sketch is the main component which absorbs solar energy. They deliver many advantages over all other types of solar heaters.

Evacuated tube absorber layer receives incoming solar radiation. The split system manifolds use the same evacuated tubes combined with a heat pipe. The working fluid boils at approx 30 c turns to vapour and rises to the heat bulb at the top. This solar water heater uses 1800 x 58mm high quality evacuated tubes with tri coating technology.

Evacuated tube solar systems consist of a ground mounted storage tank that is installed separately to the tubes mounted on the roof.