5 ms·

Solution: swimming pool on the roof. http://www.fastcodesign.com/1672202/you-deserve-a-house-with-a-pool-on-the-roof http://www.fastcodesign.com/1672202/you-de

Solution: swimming pool on the roof. http://www.fastcodesign.com/1672202/you-deserve-a-house-with-a-pool-on-the-roof http://www.fastcodesign.com/1672202/you-deserve-a-house-with...

richdougherty 11y ago
The more sun, the more water in the pool. Win-win!
pbhjpbhj 11y ago
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?
- jhallenworld 11y ago
  The Tesla Powerwall has 6.5 kwh = 23.4 M joules. 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-has-a-swimming-pool-roof/ http://inhabitat.com/crazy-home-carved-into-a-coastal-cliff-...
- cninja 11y ago
  They crunch the numbers here: http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/ http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-stor... The energy in one gallon of gasoline is equivalent to the potential energy stored in 13 tons of water one kilometer up
lostlogin 11y ago
The outflow from an Auckland homes storm water is not insignificant - an average roof would have something around 5 cubic metres of water come off it several times per year.
- toomanybeersies 11y ago
  I remember a while ago on the show "Let's Get Inventing" (Saturday morning kids show with kids inventing stuff, think it was on TV2), they tried generating electricity from drainpipes, they couldn't get enough power to even power a servo squeezing the trigger on a spraybottle, they had to get a great big firehose from an firetruck to actually generate anything.
disposeofnick9 11y ago
"Have you seen the swimming pool on the roof?" ;)

Solution: swimming pool on the roof. http://www.fastcodesign.com/1672202/you-deserve-a-house-with-a-pool-on-the-roof http://www.fastcodesign.com/1672202/you-deserve-a-house-with...

richdougherty 11y ago

The more sun, the more water in the pool. Win-win!

pbhjpbhj 11y ago

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?

jhallenworld 11y ago
The Tesla Powerwall has 6.5 kwh = 23.4 M joules. 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-has-a-swimming-pool-roof/ http://inhabitat.com/crazy-home-carved-into-a-coastal-cliff-...
cninja 11y ago
They crunch the numbers here: http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/ http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-stor... The energy in one gallon of gasoline is equivalent to the potential energy stored in 13 tons of water one kilometer up

lostlogin 11y ago

The outflow from an Auckland homes storm water is not insignificant - an average roof would have something around 5 cubic metres of water come off it several times per year.

toomanybeersies 11y ago
I remember a while ago on the show "Let's Get Inventing" (Saturday morning kids show with kids inventing stuff, think it was on TV2), they tried generating electricity from drainpipes, they couldn't get enough power to even power a servo squeezing the trigger on a spraybottle, they had to get a great big firehose from an firetruck to actually generate anything.

disposeofnick9 11y ago

"Have you seen the swimming pool on the roof?" ;)