A new passive solar water pasteurization system has been designed, built and tested. The system contains no valves and regulates flow based on the density difference between two columns of water. The new system eliminates boiling problems encountered in previous designs. Boiling is undesirable because it may contaminate treated water. The system has produced over 100 liters per day of treated water with a collector area of 0.45m2. Work is ongoing to develop a theoretical understanding of system behavior, to analytically model it and to further improve system performance.
Solar Water Purification by Pasteurization
Duff, WS, & Hodgson, D. "Solar Water Purification by Pasteurization." Proceedings of the ASME 2003 International Solar Energy Conference. Solar Energy. Kohala Coast, Hawaii, USA. March 15–18, 2003. pp. 339-341. ASME. https://doi.org/10.1115/ISEC2003-44214
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