NASA NTRS · 19780000324
Solar-powered hot-water system
Abstract
Hot-water system requires no external power except solar energy. System is completely self-controlling. It includes solar-powered pump, solar-thermally and hydrothermally operated valves, and storage tank filled with open-celled foam, to maintain thermal stratification in stored water.
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Collins, E. R.. 1979-01-01. Solar-powered hot-water system. https://ntrs.nasa.gov/citations/19780000324
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