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Definition of Active solar energy system

Active solar energy system Definition from Science & Technology Dictionaries & Glossaries
Energy Glossary
A system designed to convert solar radiation into usable energy for space, water heating, or other uses. It requires a mechanical device, usually a pump or fan, to collect the sun's energy.
Active solar energy system Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
 Solar hot water systems, except those based on the thermosiphon, use pumps or fans to circulate fluid (often a mixture of water and glycol to prevent freezing during winter periods) or air, through solar collectors, and are therefore classified under active solar technology.

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