Solar hot water tank
Here's a cutaway of a traditional solar hot water storage tank and pump system. Solar collectors heat up a fluid, usually an antifreeze, and pumps send that hot fluid into a tank. The hot fluid circulates through copper pipes in a storage tank like this one to transfer heat to water in the tank. The preheated hot water is fed into a normal hot water heater, saving energy.
March 21, 2011 1:50 PM PDT
Photo by: Martin LaMonica/CNET
| Caption by: Martin LaMonica
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