wasteheat
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Qarnot's smart space heater has learned some new tricks
Anybody with a desktop tower (or a laptop running Chrome) knows how much waste heat processors can throw off during the course of their computing. Typically that heat is simply discarded, shunted from the processor's surface through a complex series of tubes and sinks. But French startup Qarnot has a better idea: Use that energy to heat your home.
Generating power from heat will soon be dirt cheap
You could power your car's cooling AC using wasted heat, ironically, without a solar panel in sight.
Computer components may one day recycle their own wasted heat
Imagine a computer that isn't just designed to "deal" with the heat produced by its components, but one that actually uses that wasted energy to power some of its high-tech internals. That's the potential of a new discovery out of the Physical and Technical Institute (PTB) of Braunschweig, Germany. Researchers discovered what they're calling tunnel magneto thermoelectric voltage, essentially that by heating one side of a magnetic tunnel structure (the types of switches found in magnetic RAM and in the heads of hard drives) they can control the flow of electricity across its poles. The switches would still need to be triggered by matching the polarity on either side of the insulator and magnet sandwich, but heating one pole would create an electrical potential and would consume some of the energy that otherwise might get dispersed through a heatsink. We're still years away from seeing this technology in any functioning products and, honestly, we're not entirely sure we understand how exactly it would work, but it sounds like just the sort of potential-packing innovation that our (rather toasty) laps desperately need.
New phase-changing alloy turns waste heat into green energy, exhibits spontaneous magnetism (video)
Looks like harvesting waste heat is all the rage in 2011. Yet another team of researchers -- this time at the University of Minnesota -- has found a way to harness energy from our hot castoffs. The group has apparently created a brand spanking new alloy that spontaneously creates energy when its temperature is raised by a small amount. Future uses for the material, known as Ni45Co5Mn40Sn10, include charging a hybrid car's battery with the help of waste heat from its exhaust. So what's the trick? Well, this wonder material is a phase changer, meaning it can go from non-magnetic to magnetic in moments, when the temperature rises. When that happens, the alloy absorbs heat, and bam! You've got electricity. The team is also collaborating with chemical engineers to create a thin film version of the material that could be used to convert waste heat from computers. If phase changing gets you all hot and bothered, check out a video demonstration of the alloy's sudden magnetism after the break.
ORNL energy harvester turns heat waste into electricity, converts hot machines into cool customers
We've heard of turning yesterday's lunch into tomorrow's electricity, but a new energy converter coming out of Oak Ridge National Laboratory harnesses the power of a different type of hot waste. The as-of-yet unnamed thermal waste-heat converter has the potential to cool electronic devices, solar cells, and computers while generating electricity from excess heat. Its creators see the new conversion process being used to reduce the massive amounts of heat generated by petaflop computers. The converter employs up to one thousand tiny cantilevers attached to a one square inch surface (e.g. a computer chip) to produce between one and ten milliwatts of electricity -- admittedly a very small amount of energy. However, it's creators are quick to point out that a slew of these converters could generate enough power to perform small tasks in the heat-generating device -- things like sensing when a server room gets too hot for comfort. Sure it's a small step, but if they can get this stuff to save our future babies from cooking, we're all in. Full PR after the break.
MIT gurus use polyethylene to suck heat away from your next CPU
Man, MIT is making all of these other places of higher learning look silly. For what seems like the fortieth time this month, scientists at the university have revealed yet another breakthrough that might just change the way we compute in the future. Polyethylene, which is about as common a polymer as they come, could very well become a vital part of the way your next processor is cooled, as MIT boffins have figured out how to cause said polymer to "conduct heat very efficiently in just one direction, unlike metals, which conduct equally well in all directions." If you're still struggling to figure out why this matters, have a listen at this: "this may make the new material especially useful for applications where it is important to draw heat away from an object, such as a computer processor chip." In fact, even Intel is taking notice of the development, though no one's saying outright when exactly this stuff will leave the lab and hit Dell's supply chain. There's no time like the present, guys. [Thanks, Kevin]
Heat diodes give thermal computing a fighting chance
Anyone who has tried their hand at overclocking recognizes just how evil waste heat is, and we're guessing that one Wataru Kobayashi at Waseda University in Japan understands explicitly. He, along with a few colleagues, has recently devised a new diode that allows heat current to travel in one direction but not in the other. The breakthrough essentially paves the way for thermal computing to actually take off, with obvious applications including heat sinks for microprocessors. Kobayashi, who may or may not be able to eat a dozen hot dogs per minute in his spare time, also hopes that his discovery will lead to a thermal transistor, thermal logic gates and a thermal memory. The future's yours, friend.
Water-cooled Aquasar supercomputer does math, heats dorm rooms
Not that we haven't seen this trick pulled before, but there's still something magical about the forthcoming Aquasar. Said supercomputer, which will feature two IBM BladeCenter servers in each rack, should be completed by 2010 and reach a top speed of ten teraflops. Such a number pales in comparison to the likes of IBM's Roadrunner, but it's the energy factor here that makes it a star. If all goes well, this machine will suck down just 10KW of energy, while the average power consumption of a supercomputer in the top 500 list is 257KW. The secret lies in the new approach to chip-level water cooling, which will utilize a "fine network of capillaries" to bring the water dangerously close to the processors without actually frying any silicon. While it's crunching numbers, waste heat will also be channeled throughout the heating system at the Swiss Federal Institute of Technology, giving students and dorm room crashers a good feel for the usefulness of recycled warmth.
Waste heat close to becoming useful in cooling / lighting applications
Not that waste heat in general hasn't been repurposed for non-wasteful activities before, but researchers at Doshisha University are now edging ever closer to making useful the previously annoying thermoacoustic phenomenon. For those not really tied into the science realm, said phenomenon is a nonlinear one in which "heated air autonomously transforms into sound when passing through small mesh holes in a wire sheet." Gurus are now developing a cooling technology that would have heat converted to sound, where it would then be transferred through a tube and reconverted into heat; furthermore, other whiz-kids are looking to generate actual electricity from the racket. In related news, the thermoelectric conversion is being used to transform waste heat from candles into energy for LEDs, which would emit more light than the candle powering it. Pop on past the break for a demonstration of the former.
Another team figures out how to convert waste heat into energy
Not that mad scientists haven't figured out a way to convert waste heat into energy, but a team from Ohio State University has developed a new material that does the same sort of thing... just way, way better. The new material goes by the name thallium-doped lead telluride, and at least in theory, it could actually convert exhaust heat from vehicles into electricity. According to a new report about to hit the journal Science, the material packs "twice the efficiency of anything currently on the market," though it still seems as if it's a good ways out from being ready for commercial applications. Nanotechnology geeks -- you've got a real treat waiting in the read link.[Via CNET]
Cyclone Waste Heat Engine promises power on the cheap
Another day, another means of converting waste heat into something decidedly non-wasteful. This one comes to us from the folks at Cyclone, whose self-starting Waste Heat Engine can apparently be powered by virtually any source of waste heat, including exhaust emissions from an internal combustion engine, the "direct burning of biomass," or even the waste heat from another Waste Heat Engine. The company is also touting the engine's ability to provide a boost to solar-power generators, with it apparently able to capture heat using inexpensive panels attached to a roof, which Cyclone says could be installed at just 20% of the cost of other systems relying on pricey photovoltaic panels. Of course, there's no word as to what the Waste Heat Engine itself will cost, or when it'll be available, but you can check it out in action in the (auto-playing) video after the break.
ElectraTherm's Green Machine converts waste heat into electricity
Converting residual industrial heat into something usable (read: electricity) has proven to be more than a novel concept on more than one occasion, and ElectraTherm's giving the process one more vote of confidence by installing its Green Machine at Southern Methodist University. Just this past week, the firm flipped on its first commercial waste heat generator at the Dallas-based institution, with hopes to generate "fuel-free, emissions-free electricity at three to four cents per kW/hr during payback period and under a penny/kW hour thereafter." The 50kW rig has so far exceeded expectations, and the firm is now forecasting that its units will have a "subsidy-free payback period of three years or less." Of course, we aren't told exactly how many zeros reside on the left of the decimal or anything, but folks in the area can get a tour of the installation later this month.[Image courtesy of Jetson Green]
