What are the evacuated glass tubes?
The SES solar collectors are made up of rows of parallel evacuated glass tubes, which are the key components of SES solar water heating systems. Each evacuated tube consists of two glass tubes made from extremely strong borosilicate glass. The outer tube is transparent allowing light rays to pass through with minimal reflection. The outside surface of the inner tube is coated with a special selective coating (Al-N/Al) which has excellent solar radiation absorption and minimal heat reflection properties (the heat energy can get in but it can’t get out). The top of the two tubes are fused together and the space between the two tubes is evacuated to form a vacuum – this provides the best possible insulation possible, which allows sunlight penetrate easily while preventing heat loss. What is a Heat Pipe? A heat pipe is located inside the glass tubes. The purpose of these heat pipes is to transfer the suns heat to the water inside the solar collector manifold. The heat pipe is a hollow copp
