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Energy for water management and production

Energy for water management and production. Alternative water production José Luis Fernández Zayas 3 October 2008. Underwater stream electrical generators. Energy islands. Three alternative processes will be mentioned:. Passive direct solar water desalination

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Energy for water management and production

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  1. Energy for water management and production Alternative water production José Luis Fernández Zayas 3 October 2008

  2. Underwater stream electrical generators

  3. Energy islands

  4. Three alternative processes will be mentioned: • Passive direct solar water desalination • PV powered RO water desalination • Water condensation from the air.

  5. Passive direct solar water desalination

  6. Passive solar water distillation may be a viable solution to combine with other small village requirements such as vegetable production.

  7. Passive costs • For a typical 5,000 liter (1,200 gal) per day production of pure water, some 1,000 m2 of solar panels are needed • Each m2 costs from 40 to 80 US $ • Including land preparation and piping, the whole lot would cost some US$ 91,000 • In 10 years of operation, the cost of each cubic meter produced would be some 5 US$.

  8. PV powered RO water desalination

  9. PV systems (autonomous and grid connected)

  10. A typical 12,000 gpd RO commercial system would cost some US$ 3,000 currently • The 1 KWp power requirement could be supplied by a commercial (100 m2) PV panel that would cost, all peripherals included, some US$ 12,000 • Assuming the same cost distribution used for the passive option, this one would produce water at less than one dollar per cubic meter

  11. Land requirements • A comparable (12,000 gpd) RO system would require about 1 KWp total power • If produced in a solar panel, it would require about 200 m2 (1/10 previous).

  12. Water condensed from the air

  13. Condensed water costs • Several manufacturers worldwide with very varying power requirements • System really sensitive to atmospheric water content • Scientific breakthrough recently announced • In 12,000 gpd plants, probable costs would be between 1-5 US$/m3.

  14. jfernandezz@ii.unam.mx

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