10 Sep '11, 5pm

【Blog Comments】 Comment on Storing Wind Energy as Hydrogen by pagan: Before you plan on storing energy from wind...

Water electrolysis produces hydrogen. As the electricity flows through the water in an electrolysis unit, oxygen and hydrogen are evolved as gases at separate electrodes. In a 100% efficient unit, it takes about 39 kilowatt hours (kWh) of electricity to create 1 kilogram (kg) of hydrogen. In the real world, electrolysis units are about 80% efficient at best. With an 80% efficient unit, it takes about 50 kWh of electricity to create 1 kg of hydrogen. The hydrogen is piped to a hydrogen storage unit. To avoid the high cost of compressing hydrogen or of cooling and liquefying hydrogen, a good alternative is to store the gas in a metal hydride slurry. Safe Hydrogen uses magnesium as the metal and mineral oil as the liquefying agent. With the use of small particles and a suitable dispersant, the particles will stay in suspension almost indefinitely. Using a hydriding reactor, h...

Full article: http://www.cleantechblog.com/2011/08/storing-wind-energy-...

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Or maybe it was watching this hilarious, but tragically revealing, 2010 Daily Show where Jon Stewart reminds us that our l...

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greenbang.com 05 Sep '11, 2pm

“Having a combination of energy stores will provide a more robust system, with McPhy Energy’s solid hydrogen tanks used pr...

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