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.
Solar-powered hot-water system
NASA Tech Briefs ; 3 , 3
1979-01-01
Miscellaneous
No indication
English
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