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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

Energy for water management and production

Alternative water production

José Luis Fernández Zayas

3 October 2008

slide10

Three alternative processes will be mentioned:

  • Passive direct solar water desalination
  • PV powered RO water desalination
  • Water condensation from the air.
slide12
Passive solar water distillation may be a viable solution to combine with other small village requirements such as vegetable production.
passive costs
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$.
slide16

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
land requirements
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).
condensed water costs
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.