If renewable energy was a family, solar thermal technology might unkindly be seen as a dependable but rather unfashionable cousin whose life hasn't seen much excitement for some years.Solar thermal systems have undeniably benefitted from continual incremental improvements, but not much about the most commonly used flat-plate collector seems to fundamentally alter. A module containing a black, glass-covered metal absorber plate harvests solar radiation. This is backed by tubing (generally made of copper or aluminium), through which water or other heat exchange fluid is pumped into a building's space heating or hot water system.
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