In the four years following the 2008 recession, the coal industry lost more than 49,000 jobs, while the natural gas, solar and wind industries together created nearly four times that amount, according to a new Duke Univ. study. A county-by-county geographical analysis of the losses and gains shows that few new jobs were added in regions hardest hit by coal’s decline, particularly counties in southern West Virginia and eastern Kentucky.
Solar panels, wind turbines, electric vehicles and other power sources are proliferating rapidly...
How many researchers does it take to change a light bulb? And how many lives could they save by...
The editors of R&D Magazine have announced an eligibility extension for products to...
Green wall technology and semi-transparent solar panels have been combined to generate electrical current from a renewable source of energy both day and night. A prototype “green bus shelter” that could eventually generate enough electricity to light itself, has been built by a collaboration of university researchers and eco-companies.
Lawrence Livermore National Laboratory researchers have identified electrical charge-induced changes in the structure and bonding of graphitic carbon electrodes that may one day affect the way energy is stored. The research could lead to an improvement in the capacity and efficiency of electrical energy storage systems needed to meet the burgeoning demands of consumer, industrial and green technologies.
Generating electricity from biomass, such as urban waste and sustainably sourced forest and crop residues, is one strategy for reducing greenhouse gas emissions, because it is carbon-neutral: It produces as much carbon as the plants suck out of the atmosphere.
Efficiency is big in the tiny world of thermoelectric nanowires. Researchers at Sandia National Laboratories say better materials and manufacturing techniques for the nanowires could allow carmakers to harvest power from the heat wasted by exhaust systems or lead to more efficient devices to cool computer chips.
Windows allow brilliant natural light to stream into homes and buildings. Along with light comes heat that, in warm weather, we often counter with energy-consuming air conditioning. Now scientists are developing a new kind of "smart window" that can block out heat when the outside temperatures rise. The advance could one day help consumers better conserve energy on hot days and reduce electric bills.
One challenge in improving the efficiency of solar cells is some of the absorbed light energy is lost as heat. So scientists have been looking to design materials that can convert more of that energy into useful electricity. Now a team from Brookhaven National Laboratory and Columbia Univ. has paired up polymers that recover some of that lost energy by producing two electrical charge carriers per unit of light instead of the usual one.
Scientists at Univ. College London, in collaboration with groups at the Univ. of Bath and the Daresbury Laboratory, have uncovered the mystery of why blue light-emitting diodes (LEDs) are so difficult to make, by revealing the complex properties of their main component—gallium nitride—using sophisticated computer simulations.
People who own all-electric cars where coal generates the power may think they are helping the environment. But a new study finds their vehicles actually make the air dirtier, worsening global warming. Ethanol isn't so green, either. The study examines environmental costs for cars' entire lifecycle, including where power comes from and the environmental effects of building batteries.
Scientists are developing a new kind of “smart window” that can block out heat when the outside temperatures rise. The advance could one day help consumers better conserve energy on hot days and reduce electric bills.
The use of renewable energy in the U.S. could take a significant leap forward with improved storage technologies or more efforts to “match” different forms of alternative energy systems that provide an overall more steady flow of electricity. Historically, a major drawback to the use and cost-effectiveness of alternative energy systems has been that they are too variable. This lack of dependability is costly and inefficient.
Univ. of Utah engineers developed the first room-temperature fuel cell that uses enzymes to help jet fuel produce electricity without needing to ignite the fuel. These new fuel cells can be used to power portable electronics, off-grid power and sensors. A study of the new cells appears online in ACS Catalysis.
When Oak Ridge National Laboratory researcher Yan Xu talks about “islanding,” or isolating, from the grid, she’s discussing a fundamental benefit of microgrids—small systems powered by renewables and energy storage devices. The benefit is that microgrids can disconnect from larger utility grids and continue to provide power locally.
When researchers at General Electric Co. sought help in designing a plasma-based power switch, they turned to the Princeton Plasma Physics Laboratory, which helped them develop a plasma-filled tube that would replace semiconductor switches used for changing direct current to alternating current. The proposed switch could contribute to a more advanced and reliable electric grid and help to lower utility bills.
The trend toward energy self-sufficient probes and ever smaller mobile electronics systems continues, and are used to monitor the status of the engines on airplanes, or for medical implants. They gather the energy they need for this from their immediate environment, such as vibrations. Fraunhofer Institute researchers have developed a process for the economical production of piezoelectric materials that supply this type of energy.
An unprecedented boom in hydropower dam construction is underway, primarily in developing countries and emerging economies. While this is expected to double the global hydropower electricity production, it could reduce the number of remaining large free-flowing rivers by 20% and pose a threat to freshwater biodiversity. A new database has been developed in Denmark to support decision making on sustainable modes of electricity production.
Sandia National Laboratories has begun laboratory-based characterization of TransPower’s GridSaver, the largest grid energy storage system analyzed at Sandia’s Energy Storage Test Pad in Albuquerque. Sandia will evaluate the 1 MW, lithium-ion grid energy storage system for capacity, power, safety and reliability. The laboratory also will investigate the system’s frequency regulation.
American electrical utilities do a pretty fantastic job of getting us electricity when we need it. In 2006, the power was out on average for just 0.03% of the year in the U.S. But right now, this system depends on getting most of its power from coal, nuclear and gas plants: big, dependable power plants that can be turned on and off when needed.
The largest power outage in U.S. history, the 2003 Northeast blackout, began with one power line in Ohio going offline and ended with more than 50 million people without power throughout the Northeast and the Canadian province of Ontario. Despite the apparent failure of the electric grid during such cascading events, blackouts aren’t necessarily grid failures.
Finding an economical way to store renewable energy from wind or the sun has proved challenging. An alliance of four companies say they have found an answer and are proposing an $8 billion power project that would start with turbines on a huge wind farm in Wyoming and end with enough electricity for over 1 million households in Southern California. The key link is an underground energy storage site carved out of a massive salt formation.
Univ. of Utah physicists read the subatomic “spins” in the centers or nuclei of hydrogen isotopes, and used the data to control current that powered light in a cheap, plastic LED—at room temperature and without strong magnetic fields. The study brings physics a step closer to practical machines that work “spintronically” as well as electronically.
A chinstrap that can harvest energy from jaw movements has been created by a group of researchers in Canada. It’s hoped that the device will be able to generate electricity from eating, chewing and talking, and power a number of small-scale implantable or wearable electronic devices, such as hearing aids, cochlear implants, electronic hearing protectors and communication devices.
When Orlando Rios first started analyzing samples of carbon fibers made from a woody plant polymer known as lignin, he noticed something unusual. The material’s microstructure—a mixture of perfectly spherical nanoscale crystallites distributed within a fibrous matrix—looked almost too good to be true.
Imagine being able to switch out the batteries in electric cars just like you switch out batteries in a photo camera or flashlight. Engineers in California are trying to accomplish just that, in partnership with a local San Diego engineering company. Rather than swapping out the whole battery, which is cumbersome and requires large, heavy equipment, engineers plan to swap out and recharge smaller units within the battery, known as modules.
When moving through a conductive material in an electric field, electrons tend to follow the path of least resistance—which runs in the direction of that field. But now physicists have found an unexpectedly different behavior under very specialized conditions—one that might lead to new types of transistors and electronic circuits that could prove highly energy efficient.
Coming to Nevada's high desert: A massive, $5 billion factory that will pump out high-tech batteries for hundreds of thousands of electric vehicles. That's assuming state leaders deliver on the economic incentives they packaged to entice Tesla Motors to Nevada rather than four other states competing for the factory and the economic jolt it promises to bring.
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