“A review of the most important developments in rate design, distributed energy deployments, and utility business models.”
Category: energy – Page 315
Drone technology is getting better all the time, and one area folks are putting a lot of energy into is boosting the amount of time the things can stay in the air. Drone manufacturer Quaternium is claiming a new milestone in this field, after flying its HYBRiX.20 fuel-electric quadcopter for four hours and forty minutes in what it describes as a world record flight for a self-powered multicopter.
Most multicopter drones you can buy off the shelf boast flight times of 25 to 30 minutes, though we have seen custom-built multicopters fly for far longer. Last year, for example, a commercial drone operator used a bespoke quadcopter to cross the English channel in a 72-minute jaunt, while others such as dronemaker Skyfront have previously claimed endurance records well in excess of four hours.
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Germany has spent $200 billion over the past two decades to promote cleaner sources of electricity. That enormous investment is now having an unexpected impact — consumers are now actually paid to use power on occasion, as was the case over the weekend.
Power prices plunged below zero for much of Sunday and the early hours of Christmas Day on the EPEX Spot, a large European power trading exchange, the result of low demand, unseasonably warm weather and strong breezes that provided an abundance of wind power on the grid.
Such “negative prices” are not the norm in Germany, but they are far from rare, thanks to the country’s effort to encourage investment in greener forms of power generation. Prices for electricity in Germany have dipped below zero — meaning customers are being paid to consume power — more than 100 times this year alone, according to EPEX Spot.
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Many battery scientists are interested in the potential of lithium sulfur batteries because, at least in theory, they offer a high energy density at relatively low cost. However, lithium sulfur batteries face a number of challenges, including the low electrical conductivity of sulfur and the tendency of the cathode to expand significantly in size during the discharge cycle—a tendency that prevents the cathode material from being packed as densely in the battery as scientists would like.
To combat these problems and bring lithium sulfur batteries closer to reality, researchers at the U.S. Department of Energy’s (DOE) Argonne National Laboratory, the University of Illinois at Chicago (UIC) and Oregon State University have developed a new cathode material made of lithium sulfide that is encapsulated by graphene.
To make the cathode material, Argonne chemists Jun Lu and Khalil Amine heated lithium metal and then exposed it to carbon disulfide gas, a common industrial solvent. The creation of lithium sulfide, as well as the graphene encapsulation, happened spontaneously.
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China has put $3.3 billion into making new highly compact nuclear reactors which would also use for nuclear powered drones.
The potential impact of nuclear-powered drones can be seen by comparing them with existing aircraft such as the MQ-9 Reaper, which is used extensively in Afghanistan and Pakistan in operations against insurgents. The Reaper presently carries nearly two tonnes of fuel in addition a similar weight of munitions and other equipment and can stay airborne for around 42 hours, or just 14 hours when fully loaded with munitions.
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Breakthrough research from The University of Texas at Arlington and The University of Vermont could lead to a dramatic reduction in the cost and energy consumption of high-speed internet connections.
Nonlinear-optical effects, such as intensity-dependent refractive index, can be used to process data thousands of times faster than what can be achieved electronically. Such processing has, until now, worked only for one optical beam at a time because the nonlinear-optical effects also cause unwanted inter-beam interaction, or crosstalk, when multiple light beams are present.
An article published in the prestigious Nature Communications journal, by the research group of Michael Vasilyev, an electrical engineering professor at UTA, in collaboration with Taras I. Lakoba, a mathematics professor at UVM, detailed an experimental demonstration of an optical medium in which multiple beams of light can autocorrect their own shapes without affecting one another.
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Freshly discovered malware called Triton can compromise safety systems that control many kinds of industrial processes.
For years, security experts have been warning that hackers can disable systems that control critical infrastructure we all rely on, such as dams and power plants. Now researchers at Mandiant, which is part of the security firm FireEye, have revealed that a new form of malware, dubbed Triton, closed down the operations of a business in the Middle East belonging to Schneider Electric, a French company. The researchers say that they haven’t attributed the hack to a particular attacker, but they do say it bore hallmarks of threats from a nation-state.
Triton appears to have targeted a so-called safety instrumented system, or SIS, which monitors the operation of a physical process using sensors and acoustics. By taking control of it, hackers can destroy or damage the process the SIS is monitoring by tricking it into thinking everything’s normal, when in fact the process is operating at unsafe levels.
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GE researchers are using cold spray to repair and build new parts for aviation, energy, and other applications. http://invent.ge/2iqaKra
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The humble house plant could soon start earning its keep by lighting up a room, if new research from MIT pans out. Engineers have hacked watercress plants to make them glow for a few hours at a time, and while it’s currently only about as bright as those old stars you might have stuck to your ceiling as a kid, the long-term plan is to develop plants that you could read by to reduce the need for electric lighting.
The idea of a glowing plant is not particularly new. They’ve been promised by Kickstarter campaigns for years, including the likes of Bioglow and Glowing Plants, but those startups have since gone bust. Although we’re not going to pretend that this new project is immune from meeting the same fate, having the backing of MIT scientists gives us a little more hope that the glowing plants might eventually bear fruit.
The work comes from the same “plant nanobionics” team that recently designed explosive-detecting spinach and leaf sensors that can alert farmers at the first sign of thirsty crops. In this case, the researchers wanted to tackle lighting, which accounts for about 20 percent of energy consumption worldwide.
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Scientists have developed new 3D-printed plastic objects that can hook up to Wi-Fi without the aid of any electronics or batteries, meaning household devices could get a lot smarter in the future without the need for any circuitry.
If that’s not blowing your mind just yet, think about this: the tech could be used to make a laundry bottle that orders a refill online as soon as it runs out, or a simple volume slider that connects to your speakers without any cabling or even a power source.
So how is this possible? To achieve this, a team from the University of Washington built a system comprising a plastic switch, spring, gear, and antenna, which when activated with a press or other movement can absorb or reflect passing Wi-Fi signals in order to communicate.
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