Green Tech

Hitch a ride through Google's cloud

Your Gmail box lives somewhere in the jumble of servers, cables, and hard drives known as the "cloud" but it often migrates in search of the ideal location.

Google today released an animation that answers the question: what happens when I press send on Gmail? The company created the interactive feature called The Story of Send to highlight the security and relatively low energy footprint of its data centers. The graphics repeat Google's estimate that its data centers use 50 percent less energy than a typical data center and 30 percent of their data center energy is supplied from more

Step on it: Virus could lead to motion-powered gadgets

Scientists are genetically engineering viruses in the pursuit of better battery life, perhaps leading to smartphones charged from the motion of walking.

The Department of Energy's Lawrence Berkeley National Laboratory yesterday described a microelectronic device that uses a benign virus to build up electric charge from movement.

Its first prototype was able to display the No. 1 on an LCD display when a person pressed a postage-stamp size button.

That amount of current isn't useful enough to charge common electronics, such as a music player or phone. But the researchers' novel approach to harvesting energy from motion shows more

Got a deck? Solar panels now a plug-in appliance

It's a green-energy geek's dream do-it-yourself project: attach a few solar panels to your deck and watch your electric bills go down. Now one company is selling such a product.

SpinRay Energy has developed a system that lets consumers install up to five solar panels on their decks and plug them into an outdoor power outlet. People can install one panel at a time, and get up to 1,000 watts of power with five installed.

The main electrical components of the system have the UL safety certification, including the solar panel and the microinverter, which converts direct more

Get smart: Charge your phone while walking in this shoe

Love walking and texting? Still haven't done a faceplant on a streetlight? Well, this sneaker from Kenya can power your phone so you'll never have to look up from that screen again.

Inventor Anthony Mutua, 24, has been showing off his recharging sneaker at the first-ever Kenyan Science Technology and Innovation Week, held in Nairobi. It's another way of using your body's own energy to fuel electronics.

The shoe apparently has a very thin "crystal chip," perhaps a piezoelectric device, that generates power when the sole bends. It can charge phones via a long cable to a pocket while the user walks, or store power for later charging.

Picture brightens on auto-tinting smart windows

Windows that shade automatically have been part of high-tech home demos for years, but there are signs that smart glass is leaving research labs and heading into more actual buildings.

Building-materials maker Saint Gobain earlier this week acquired Sage Electrochromics, and another smart glass startup, Soladigm, signed a distribution deal with Guardian Industries, one of the largest glass manufacturers.

Materials scientists have toiled for years developing glass that can automatically tint based on the amount of light coming in, but technical challenges have meant that the technology is hardly used.

The investment by large companies in tintable window glass signals more

Toshiba, Bridgelux bet on silicon to slash LED lighting prices

Toshiba and Bridgelux think they're worked out the key ingredient to making LED lighting mainstream: silicon.

The two companies today announced a partnership to manufacture LED light sources using much of the equipment typically used in semiconductor fabs. They intend have a commercial-scale facility operating next year, according to Bridgelux CEO Bill Watkins. As part of the deal, Toshiba has invested an undisclosed amount in Livermore, Calif.-based Bridgelux.

LED light sources, which are used in everything from TVs and consumer light bulbs, are typically made with a semiconductor -- gallium nitride -- on a layer of sapphire. Bridgelux more

EPA rates range of 300-mile Tesla Model S at 265 miles

Tesla announced a goal of 300 miles for the range of its Model S electric sedan early in its development. As the company came closer to production, it said that only the top-trim Model S, with an 85-kilowatt-hour battery pack, would achieve the 300-mile figure. Less expensive versions of the car, with 60- and 40-kilowatt-hour batteries, would hit 230 miles and 160 miles, respectively.

Today, in a somewhat technical and involved blog post from Tesla founder Elon Musk and CTO JB Straubel, the company revealed that the 85-kilowatt-hour Model S only achieved a range of 265 miles.

The post initially more

BMW gives ActiveE drivers incentive to fuel up with the sun

By driving electric cars, BMW ActiveE drivers have already kicked the gasoline habit. But now the auto manufacturer is giving them a little help in the effort to quit fossil fuels for good. BMW has partnered with Real Goods Solar to offer EV customers discounted residential solar panel systems so they can charge up using only the sun.

Real Goods Solar will install solar panels at homes of ActiveE drivers at a 35 percent discount. The Colorado-based company operates offices in California and Connecticut, and offers several purchase plans, including the typical upfront system purchase, a zero-down 20-year lease of more

Fisker Karma involved in house fire but battery not cause

Fisker Automotive received worrying news last week when a Karma sedan burned in a house fire in Texas. The cause is still being investigated, according to the company.

The fire started shortly after a new Karma owner parked the car in a garage, according to a report in Autoweek. A fire investigator told Autoweek that the Karma, which was not plugged in, was the origin of the fire, but the cause was not known.

Fisker released a statement saying that the electric car's battery pack was intact and "does not appear to be a contributing factor in this incident." more

Siemens electrifies trucks with trolley technology

City buses, streetcars, and regional rail lines all over the world run on electricity, garnered from overhead lines. Now Siemens wants to apply the same technology to long-haul trucking with its eHighway concept.

Siemens, an industrial and automotive supplier, contends that the majority of vehicle pollution comes from big diesel trucks transporting goods over many freeway and highway miles. Its eHighway would eliminate tailpipe pollution from these trucks for the majority of those miles.

On a test track in Europe, Siemens has been running trucks using its diesel-hybrid drive technology. Conductors on top of the trucks make contact with overhead more