GreenTech
Latest
MIT's genetically modified viruses boost solar-cell efficiency by herding nanotubes
The wizards of MIT have done it again. Having checked artificial leaves and Operabots off the to-do list, they've moved on to improving the efficiency of solar cells. Their technique combines a genetically modified version of the M13 virus with carbon nanotubes, which have already been shown to increase efficiency. Unfortunately, some nanotubes enhance solar cell performance, while others inhibit it – and both types tend to clump together, negating their benefits. The modified M13 virus, however, can separate the two types as well as prevent clumping; we've seen similar use of the Tobacco mosaic virus to build better electrodes. Adding virus-built structures to dye-sensitized solar cells increased power conversion efficiency by almost one-third and, with only one additional step in the manufacturing process required, the new approach could be rapidly taken up by existing production facilities. MIT: proving once again that viruses are good for more than just smiting your enemies.
Samsung demos transparent LCD using ambient backlight
Wirelessly-powered TVs are nice, and transparent displays are cool and all, but what about an ambient light-powered transparent LCD? Well, that's nothing short of awesome. Samsung showed off just such a device at CeBIT 2011 last week -- a prototype 46-inch display with 1920 x 1080 resolution and ten-finger touchscreen capability. We aren't sure what kind of black magic Sammy put in this thing, but it's an incredible feat of engineering to make such a large display -- and its accompanying solar cells -- efficient enough to run exclusively off the juice it pulls from surrounding light sources. No word on how the photon-powered LCD compares to existing HD monitors in terms of brightness, refresh rates, or color reproduction, but a muted picture is a small price to pay for cutting the electrical cord forever. Update: It appears that the source article misunderstood the way this LCD is powered -- there are no solar panels involved here; the ambient light is merely to replace the traditional backlight rather than powering the device.
Ekokook concept kitchen's mantra: waste not, want not
If, like us, you've spent a fair amount of time in a kitchen cooking up a storm, then you're probably aware of one of the major drawbacks of major home-cooking... it generates a ton of waste. That's right -- up to 85 or 90 percent of a family's trash can be generated within the vicinity of the kitchen. Faltazi's concept kitchen should be interesting for just that reason -- Ekokook is designed to generate essentially zero waste. The solid waste -- things like glass -- are ground down using a hand-activated steel ball, and there's also a manual paper shredder which compacts the leftovers into small bricks. Water is stored, filtered, and reused, with waste water being used to water plants. Oh, and there's also an eco-friendly earthworm compactor in a drawer! Does it get any better? Well, there's a video after the break to check out.
Nissan says its new electric car, the Leaf, gets 367 miles per gallon
Nissan's gotten into a bit of a bragging contest on Twitter -- possibly fueled by Chevrolet's recent, shaky claim that the Volt will get 230 miles per gallon. The company is now saying that its new electric car, the Leaf, will get an astonishing 367 miles per gallon... even though it's a 100 percent electric car, and runs on absolutely no fuel. So, isn't that zero miles per gallon? Well, yes and no: all these massive numbers are based on both the Department of Energy and the EPA's calculations for estimating equivalencies in electric cars. Why? Well, it seems that car companies are still giving us -- the prospective buying public -- MPG figures because they think that's what we understand best. Tony Posawatz, vehicle line director for Chevy's Volt recently admitted to the New York Times that the miles per gallon matrix is "probably not the best measure of goodness" for a car that uses no gallons at all, but that it's "what people are accustomed to." We agree -- he's got a point -- but people were also accustomed to the hi-fi, the corded landline, and the steam engine. We assure you: people understand that a car that runs on zero gas (and therefore gets an astonishingly low amount of miles per gallon) is really, really awesome. So the MPG matrix is useless when talking about electric cars -- we'll adjust! Read - Nissan claims 367 miles per gallon for electric LeafRead - The Chevy Volt: mileage numerology
GE develops high efficiency incandescent bulbs
Incandescent is getting a pretty bad name in today's going-green society, but GE wants to salvage the tech with innovation before it's scrapped for the ages in laws that ban its use at home and abroad. GE's new high efficiency incandescent (HEI) lamp doubles the efficiency of today's 15 lumens-per-Watt incandescent bulbs achieving something closer to fluorescents -- which GE claims has the potential of saving supposedly hundreds of millions of tons of carbon dioxide annually, if adopted universally, of course. We doubt it's any coincidence that this announcement was made so shortly after the Australia's law and California's bill against incandescent bulbs, but the message is clear: save power, or Croc Dundee and the Governator will hunt you down and bad things will happen.[Via Slashdot]
150 LED bulb uses 9W, costs $65
You're a very special kind of person -- our kind of person -- if you're the type to drop a good $65 on a single light bulb only because it's made up of 150 warm white LEDs. The 308 lumen (and 594 lumen frosted glass version) bulb sips only 9.2 watts, but is said to be equivalent of a 70 watt incandescent, meaning even though you'll improve your energy consumption by roughly 87%, at 20 cents a kilowatt-hour it'll still take you about 4,600 hours of incandescent use to reconcile the bulb's. But you want one anyway, don't you? Like we said, our kind of person.
