Evacuated Tube Solar Collector

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An evacuated tube solar collector is comprised of various components:

• Frame – typically made from aluminum
• Manifold
• Evacuated glass tubes – also known as heat pipes

Evacuated tubes can be used in many different configurations in a solar water heating system. In some systems, the water is does not flow through the tubes and in others it does. Some evacuated tubes have a copper pipe inside which is filled with alcohol which transfers the heat produced by the evacuated tube to the manifold where it is transferred to the water.

Evacuated tubes are known for their superb performance in European weather conditions as they are immune to wind chill. The vacuum inside the tube creates and insulating layer which prevents the evacuated tube solar collector from cooling when wind passes over it acting very much like a thermo-flask.

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