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Yet another weird SF fan
 

Thursday, May 08, 2008

How Much Electricity Does It Take to Make Water?

IEEE Spectrum asks:

How Much Water Does It Take to Make Electricity?

23 April 2008—Remember when you were a kid and your parents made a big fuss about turning off the light when you left a room? Who knew that, besides adding to the monthly electric bill, keeping a single 60-watt lightbulb lit for 12 hours uses as much as 60 liters of water? According to researchers at the Virginia Water Resources Research Center, in Blacksburg, Va., fossil-fuel-fired thermoelectric power plants consume more than 500 billion L of fresh water per day in the United States alone.

If we turn the question around, according to Wikipedia, it takes around 4 kWh to produce a cubic meter of water. That means it 1000 kWh can produce almost 250,000 liters of water. In the IEEE article, the only fuel sources that took more of the allegedly-scarce water than 250,000 liters per 1000 kWh were fuel ethanol (sometimes) and biodiesel (usually).

In other words, if we keep our heads on and don't use ridiculous energy sources, there need be no water shortage limiting the power supply.

1 Comments:

Blogger Jason said...

Does this mean that we're running out of water?!? Horrors! Next we'll run out of Iron, or, worse, Hydrogen!!!

I blame George Bush.

3:10 PM  

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