What to Know About Evacuated Tube Solar Water Heater

venturist | Mar 31, 2010 |

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Contrary to what some people believe we have seen solar water heating system appear long time ago. As technology advanced they became more efficient and now the efficiency offered by evacuated tube solar water heaters is over 90 percent. Basically you will see 90 percent of all the sun's energy being absorbed and then converted properly into heat. You are to see incredibly low energy generating costs if you compare to a regular source.

Evacuated Tubes of Vacuum tubes are usually made out of glass. In most situations we see a double wall system based on Pyrex. Special absorbing coating is utilized in order to coat the outer surface of the glass inside the inner tube. Inside all tubes air is removed in order to create one vacuum. Copper heat pipes are located right in the middle of these tubes. Such a sealed heat pipe is good as it also includes in most possible cases anti freeze liquid and can help in absorbing infra red radiation better.

The one big advantage that appears with the use of evacuated tubes in solar water heating stands in the fact that these also work when we are faced with cold weather. Vaccums will prevent heat tubes from ending cooled too much by the temperature of the ambient. Also, evacuated tube systems can even absorb energy from the sun during winter and this is really important. In different circumstances you might be faced with the water being heated to 50 degrees by using just the water heater system.

Evacuated tubes were definitely not popular in the past because they were not available for all people. At first we only saw them in different commercial equipments, which were quite expensive and not affordable by regular people that wanted to use them. Nowadays the tubes are warmly recommended by specialists and they are much more available. You would end up with a lot more efficiency in your solar water heater system if it includes good evacuated tubes.