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anninhilator |
artificial leaf
May 7 2011, 11:28 AM EDT
http://www.stumbleupon.com/su/1lteWF/blogs.discovermagazine.com/80beats/2011/03/28/scientists-create-worlds-1st-practical-artificial-leaf-10x-as-efficient-as-the-real-thing/
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Keyword tags:
artificial
leaf
power
self sufficient
solar
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PedroAsani |
1. RE: artificial leaf
May 7 2011, 2:34 PM EDT
Interesting development, but the report is sketchy on the numbers.45 hours continous operation so far. Not bad for a prototype. 1 gallon bucket of water. And how long before that is used up? How much water does it use per hour? Enough electricity to power a home in a developing country. Watts? Amps? Volts? Numbers needed. 1 out of 1 found this valuable. Do you? |
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anninhilator |
2. RE: artificial leaf
May 7 2011, 4:47 PM EDT
| Post edited: May 7 2011, 5:36 PM EDT
cant seem to find more infobut we can hez use mathz :D 1 gallon = 3.785 litre = 3.785 kg hydrogen is 16 times lighter than oxygen==> it makes up for 11 % of weight of water 1 gallon of water = 0.420555 kg of hydrogen= 60 MJ 3 times more energetic than gasoline or natural gas if this turns out to be reliable, i dont care if it takes days, it turns water into fuel which is 3 times better than gasoline :D collecting it is a problem though now to calculate how fast it does what it does assuming it has 100 % efficiency sun dishes out approx 2 cal/cm2/min which is 5040000 J per metre per hour which means it needs 119 sunny hours to convert 1 gallon of water===> 10 days if you have 1 m^2 average home uses up 13 000 kwh per year=46800000000 joules which means you need 334 litres of hydrogen per year or 835 litres if used with 40 % efficiency(todays generators) which is 220 gallons. You need 2.3778 gallons to make a liter of hydrogen which equals 1985 gallons of water you need to process 5.515 gallons a day to meet your energy requirements. about 50 m 2 will do the job edit i just found out my calcs are flawed 4380 kwh is average consumption making the new result 16. 8 m 2 to meet energy req of an average home that is 1.85 litres of hydrogen per day(40 % efficiency) done calculating. Now i will probably find out that i am wrong :D Do you find this valuable? |
