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How Does a Solar Collector Work?

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Although there are various compact and non-pump solar heating systems, most solar-collecting setups use one or more pumps to push the water/antifreeze/oil around the system. Solar heating systems usually comprise five primary elements: a collector, a hot water storage cylinder, a panel of controls and sensors, one or more pumps, and pipework. This is how it works:

One type of solar water-heating system.

• The sun heats the heat absorber in the collector.

• The heat from the absorber is transferred to the water/fluid.

• The controls switch on and set the pump(s) in action at a designated temperature.

• The hot water/fluid is pumped from the collector to a loop/heat exchanger in a storage tank.

• The water from the storage tank is used either directly as hot water or for space heating.

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