EnergyHarvesting
Latest
MIT researchers develop chip that can harvest energy from multiple sources
We've seen a number of different devices that can harvest energy from various sources, but none quite like this new chip developed by a team of MIT researchers. It's able to harvest energy from three different sources simultaneously: light, heat and vibrations. The key to that is a sophisticated control system that's able to rapidly switch between the three sources at all times to prevent any of that energy from going to waste (and not draw too much power itself), with energy from the secondary sources stored in capacitors to be picked up later -- as opposed to existing systems that simply switch between sources based on what's most plentiful. As doctoral student Saurav Bandyopadhyay explains, efficiently managing those disparate sources could be a "big advantage since many of these sources are intermittent and unpredictable," and it could in turn lead to the chip being used in a range of different applications where batteries or existing energy harvesting methods just aren't enough: everything from environmental sensors in remote locations to biomedical devices.
Caltech researchers devise acoustic diode that sends sound one-way, could harvest energy
Sound has this habit of traveling in more than one direction -- useful in most circumstances, but not so welcome when a person in one room is looking for a little peace and quiet while someone in the next is blasting music. Sound-proofing is one solution to that problem, but some researchers at Caltech say they've now come up with a better one: an acoustic diode that can be tuned to allow sound to pass through in only one direction. As you might expect, however, that's all still very much in the early stages, but the researchers say the technology could eventually allow for "true soundproofing," or even be used for other purposes, like scavenging sound energy from structural vibrations and turning that into electricity. The official announcement with some of the finer details is after the break, and the researchers' full paper is published in the July 24th issue of Nature Materials.
Georgia Tech engineers pull energy out of atmospheric hat, go on electromagnetic scavenger hunt
Mankind's about to plunge into the depths of a wireless sensor-powering ether binge -- braincell annihilating vapors not included. Spearheaded by Georgia Institute of Technology's professor Manos Tentzeris and his engineering team, this ambient energy scavenging tech harnesses electromagnetic frequencies in the 100MHz - 15GHz range -- anything from your FM car radio to radar -- and converts it into a useable DC power source. So, it's free energy -- kind of. The cheap, self-powering paper or flexible polymer-based sensors are created using standard inkjet printers and Tentzeris' "unique in-house recipe" of circuit-building silver nanoparticles. Current testing hasn't yet yielded significant enough wattage to power your PS3 Slim, but it could soon via the help of supercapacitors and future solar cell integration. Imagine clothing embedded with health-monitoring biometric sensors, airport security run by something other than aloof TSA agents, or even spoilage-aware drink cartons -- milk that tells you when it's gone sour. The invisible radio band-charged possibilities are endless, but with storage still in the microwatt to one milliwatt range, it's more concept than solid vaporware reality.
Airbus' plane of the future will harvest energy from passengers, earn Agent Smith's approval (video)
Airbus has been consulting its crystal ball recently and its findings have now been shared with the world in the shape of a new concept plane. Looking entirely detached from the economic and physical realities we know today, this futuristic people carrier includes auto-morphing seats that adjust to your size and shape and also harvest excess heat you produce. How is this achieved? Smart materials is all we're told, leaving us to use our imagination to fill in the gaping blanks. Eschewing the usual class system, this Airbus concept instead offers three functionally distinct areas: a Smart Tech Zone at the back is the closest to what we're used to today, an Interaction Zone in the middle uses holograms to help you relax or conduct some mission-critical meetings in flight, and a Vitalising Zone up front is where more "bio-morphing" seats will provide you with massage or acupuncture treatments. The ceiling in that front part of the plane can also be turned transparent, letting you soak up the panorama (and get a good tan while you're at it). You can see and hear more about it in the videos after the break.
Fujitsu hybrid energy harvester makes power from light or heat, gets us closer to human batteries
As fleshy meatbags, we tend to give off a lot of excess heat as we futilely live our lives. Fujitsu wants to help capture every last particle motion, and all the other warmth we generate through the myriad of other inane activities like driving cars, firing rockets, and trying to not freeze to death. But, it's not just happy with that, developing a new "hybrid energy harvesting device" that does double-duty by also capturing light from the sun. It's a process shown after the break but, with no hard numbers to go with that pretty picture, we're not sure just how efficient it is at doing either. Still, there are some 6.7 billion people worldwide. How efficient does it really need to be?
Inhabitat's Week in Green: pencil-tip generators, the Nissan Leaf, and the world's largest wind turbine
Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green. This week we saw renewable energy take the world by storm as Spain announced plans to construct the world's largest wind turbine and a team of engineers made waves with plans for an underwater turbine modeled after whale flippers. We also saw Boeing shine light on plans to produce a new breed of ultra-efficient solar panels that are suited for space, while researchers in Japan developed a potent new kinetic generator that's as tiny as a pencil tip. Innovative eco transportation also picked up the pace as China rolled out plans to produce the first fuel cell powered light rail train and the world's largest solar-powered boat made its successful maiden voyage across the Atlantic. We also applauded the Nissan Leaf as it took first place as the European Car of the Year and we were wowed by Mercedes' next-generation concept car, which may one day be grown in a lab. We also showcased several new ways that technology stands to wire our lives -- starting with an electronic smart wallet that curbs spending by clamping shut like a clam. We also looked at Harvard's plans for a laptop computer powered by biogas and we were impressed by Nike's next-gen design tools for producing environmentally efficient clothes. Finally, we wrapped up the week with two exciting advances in tablet tech - India is testing a solar-powered I-Slate tablet geared at children in need and Substrata rolled out a gorgeous wooden iPad case that goes light on the earth.
Tiny, energy-scavenging generators could have big impact
They're far from the only ones working on tiny, energy-harvesting generators, but a group of researchers from the University of Michigan may well be farther along than most. Unlike some similar devices, their generator is able to scavenge even the slightest bits of energy from arbitrary, non-periodic vibrations in everything from bridges to the human body. That may not add up to a huge amount of energy, but the researchers say the generators are able to scrape together enough to keep a wrist watch or a wireless sensor running, or potentially power even a pacemaker by the person's own body movements. Of course, the device likely won't be powering anything beyond the lab anytime soon -- the researchers are still going through various prototypes using different types of energy conversion, and are naturally working to patent it as well.
Researchers develop tiny, autonomous piezoelectric energy harvester
Folks have long been using piezoelectric devices to harvest energy in everything from dance floors to parking lots, but a group of European researchers have now shown off some novel uses for the technology at the recent International Electron Devices Meeting that could see even more of the self-sufficient devices put to use. Their big breakthrough is that they've managed to shrink a piezoelectric device down to "micromachine" size, which was apparently possible in part as a result of using aluminum nitride instead of lead zirconate titanate as the piezoelectric material, thereby making the devices easier to manufacture. Their first such device is a wireless temperature sensor, which is not only extremely tiny, but is able to function autonomously by harvesting energy from vibrations and transmit temperature information to a base station at 15 second intervals. Of course, the researchers say that is just the beginning, and they see similar devices eventually being used in everything from tire-pressure monitoring systems to predictive maintenance of any moving or rotating machine parts.
ZigBee Alliances developing Green Power standards for energy harvesting devices
Home automation industry folks, heads up: the ZigBee Alliance has announced the development of a Green Power feature set, which is the first step in creating a global standard technology for energy harvesting devices. When it becomes available sometime at the end of 2009, you and your fellow ZigBee Alliance members will finally be able to create and market self-powered whatsits that communicate on ZigBee and ZigBee PRO networks. Here's hoping that NEC takes full advantage of this for the next iteration of its award-winning Carbon Ball game! Full PR after the break.
