Seriously though has anyone crunched the numbers on rainwater storage for microgeneration in a domestic setting.
Could I efficiently use excess solar to pump water in to a house roof storage area and generate electric from that?
Could I efficiently use excess solar to pump water in to a house roof storage area and generate electric from that?
The energy in one gallon of gasoline is equivalent to the potential energy stored in 13 tons of water one kilometer up
Gravity potential energy = mgh. Suppose pool is 10 meters up, then you need 239,000 kg of water = 63K gallons or 8400 cu ft. This is a huge pool: 29 ft. x 29 ft x 10 ft.
You could use the city water supply: borrow water through a turbine at night, and return it during the day :-)
Or have pool up very high, for example on a cliff overlooking the Mediterranean:
http://inhabitat.com/crazy-home-carved-into-a-coastal-cliff-...