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Solar thermal collectors

Can you imagine showering in water heated by the sun? This is possible even in cold areas such as in the Nordic countries. All you need is a solar thermal collector installed on top of your house. Like solar panels, solar thermal collectors exploit the rays of the sun. The difference is that while solar panels generate electricity, solar thermal collectors are used to heat up water. This warm water can be used in the shower or for heating the house.

When the sun’s rays hit the solar thermal collector, water is heated and a regulatory system ensures that the water continues to circulate as long as the sunlight is strong enough to increase the water temperature. The solar thermal collectors exploit the energy from solar radiation and are not dependent on the temperature. This means that they can also produce heat in the winter, as long as there is sunshine. Since the sun often shines on solar thermal collectors in periods when there is little need for heating, the hot water is led out into an insulated tank – a heat-storage facility – so that the energy is available in periods without sunshine.

Read more:
http://www.bellona.no/norwegian_import_area/factsheet/energi/1138834311.25
http://en.wikipedia.org/wiki/Solar_collector