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Today is Wednesday May 14, 2008

Desal Water Cost per Household?
Analysis & Commentary: "Affordable Desalination"
(to calculate: click curser on, then off, yellow input cell)

acre feet per year per household  
  water use per day per person (gallons)  
  persons per household  
  gallons per acre foot  
  acre feet per year per household  
     
cost per acre foot per year to finance desalination plant  
  cost: desal complex, 1.0 km3 / year output (US$ billions)
  cost: permits, lawsuits, lobbying, mitigation payments
  lifetime of desal plant (years)  
  bond interest rate - amount=cost, duration=plant lifetime
  yearly payment - total capital cost (fully amortizing)
  acre feet per cubic kilometer  
  desal plant financing payment per acre foot
  desal plant financing payment per household per year
       
cost per acre foot for electricity for desalination  
  kilowatt-hour per cubic meter  
  cubic meters per acre foot  
  kilowatt-hours per acre foot  
  cost per kilowatt-hour (cents)  
  electricity cost per acre-foot
  electricity cost per household per year
     
operations cost for desalination plant  
  operations & maint. as % of energy cost  
     
total cost per acre foot for desalinated water  
  total cost per acre-foot for desal water  
  total cost per household for desal water per year
  monthly water bill - household purchasing desal water



How to use this calculator:

(1) It is sometimes necessary to click on one of the yellow input cells, then click somewhere else on the screen in order to prompt the interactive spreadsheet to calculate and display results.

(2) Yellow cells are input cells - you may enter your own assumptions in these cells.

(3) When you refresh the screen, the original default assumptions will reappear in the yellow input cells.
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