THE GREEN PLANET BLOG - Our World and Environment...

All about conservation, ecology, the environment, climate change, global warming, earth- watch, and new technologies etc.

Thursday, September 23, 2010

RESEARCH WATCH: Scientists hope to collect electricity from the air...

Moody sun burst hovering over a trough at Kram...Image via Wikipedia  RESEARCH WATCH: Scientists hope to collect electricity from the air - green energy... 




'Hygroelectric' collectors could someday harness atmospheric electricity

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Nikola Tesla once dreamed of being able to harness electricity from the air. Now, research being conducted at Brazil’s University of Campinas (UC) is indicating that such a scenario may indeed become a reality. Professor Fernando Galembeck, a UC chemist, is leading the study into the ways in which electricity builds up and spreads in the atmosphere, and how it could be collected. “Our research could pave the way for turning electricity from the atmosphere into an alternative energy source for the future," he stated. "Just as solar energy could free some households from paying electric bills, this promising new energy source could have a similar effect.”



Scientists once believed that water droplets in the atmosphere were electrically neutral, even after having come into contact with charged dust particles. Galembeck and his UC team, however, have shown that this isn’t the case. In a lab experiment, they noted that tiny particles of silica and aluminum phosphate became negatively and positively charged (respectively) when circulated in highly-humid air. “This was clear evidence that water in the atmosphere can accumulate electrical charges and transfer them to other materials it comes into contact with,” Galembeck explained. “We are calling this 'hygroelectricity,' meaning 'humidity electricity'.”



He now pictures collectors, not unlike solar cells, that could someday collect and distribute hygroelectricity from the air. Just as solar cells work best in sunny places, his collectors would do best in humid parts of the world. He even believes it’s possible that by diminishing the electrical charge in the air, his collectors could prevent lightning, especially if mounted on top of tall buildings. His team is currently experimenting with different metals, to find out which would work best for capturing atmospheric electricity and preventing lightning strikes.



"These are fascinating ideas that new studies by ourselves and by other scientific teams suggest are now possible," he said. "We certainly have a long way to go. But the benefits in the long range of harnessing hygroelectricity could be substantial."



A report on Galembeck’s research was presented this week at the 240th National Meeting of the American Chemical Society.



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Monday, September 6, 2010

Something new - the rechargeable LED lightglobe...


R, G, and B LEDs [7].Image via Wikipedia














Have you seen this before? Something new readers -  a rechargeable LED lightglobe...



Now here's something we've never seen before – a rechargeable lightglobe. Chinese company Magic Bulb has patented a new type of device which incorporates a battery and LED lightblobe to produce a lightglobe which uses only 4 watts but produces the equivalent light of a traditional 50W globe. If the power fails, the globe will keep running for around three hours or it can be screwed out of its socket and the handle extended to turn it into a bright torch.



The Magic Bulb was on show in the China section of IFA in Berlin this week and is expected to retail for between US$30 and $40 when it finds distribution in other parts of the world. Does it have a significant and viable point-of-difference to other globes – you betcha!



It's a set and forget solution that will almost certainly come in handy when the electricity goes down next. It has a life of 20,000 hours, saves over 70 percent of the power used by an equivalent brightness 50W filament globe, and meets all the international standards.



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http://www.gizmag.com/rechargeable-led-lightglobe/16265/   Rechargeable LED lightglobes

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