Archive for the ‘energy’ category: Page 150

Jul 22, 2020

A laser motor directly transforms light energy into mechanical energy

Posted by in category: energy

A novel light-driven actuator can induce relative movement between two objects.

Jul 21, 2020

Physicists find ways to control gamma radiation

Posted by in categories: energy, physics

Researchers from Kazan Federal University, Texas A&M University and Institute of Applied Physics (Russian Academy of Sciences) found ways to direct high frequency gamma radiation by means of acoustics.

Their paper describes an optical ‘switch’—a device able to let through or stop quanta by switching the acoustic field. Basically, the mechanism makes iron ‘transparent’ for when needed.

The Mossbauer Spectroscopy Lab of Kazan Federal University showed acoustically induced transparency of a resonant medium for in an experiment. The essence of this phenomenon lies in the transformation of the spectrum of the absorption line into a comb structure consisting of satellite lines spaced from the main line by the frequency of the acoustic field. For the experiment, gamma quanta with an energy of 14.4 keV were used, which are emitted during the decay of the excited state of the iron-57 nucleus.

Jul 20, 2020

Tuscon Electric Power Makes Dramatic Pivot Toward Renewable Energy

Posted by in categories: energy, sustainability

Remember just 2 years ago when the utility companies that supply electricity to customers in Arizona went into a tizzy over a ballot initiative that would mandate them to get 50% of their electricity from renewable sources by the year 2030? Oh, the weeping and wailing and gnashing of teeth could be heard from sea to shining sea. It was a direct frontal assault on the American way of life. It was so dire, the utilities ponied up $40 million of their own money (actually it was their customers’ money) to defeat it.

Jul 20, 2020

New Spin Record Set: 1 Million rpm

Posted by in categories: electronics, energy

Circa 2008

Industrial motors can spin at a head-spinning 250,000 revolutions per minute. But a new matchbook-sized motor runs circles around the competition.

Researchers from ETH Zurich’s Department of Power Electronics created a drive system in cooperation with its industrial partners that exceeded 1,000,000 rpm in tests.

Jul 20, 2020

Improved Advanced Energy Storage Using New Nano-Engineering Strategy

Posted by in categories: energy, engineering, nanotechnology, sustainability

New types of cathodes, suitable for advanced energy storage, can be developed using beyond-lithium ion batteries.

The rapid development of renewable energy resources has triggered tremendous demands in large-scale, cost-efficient and high-energy-density stationary energy storage systems.

Lithium ion batteries (LIBs) have many advantages but there are much more abundant metallic elements available such as sodium, potassium, zinc and aluminum.

Jul 19, 2020

Astrophysicists unveil biggest-ever 3D map of Universe

Posted by in categories: energy, space

Geneva (AFP)

Astrophysicists on Monday published the largest-ever 3D map of the Universe, the result of an analysis of more than four million galaxies and ultra-bright, energy-packed quasars.

The efforts of hundreds of scientists from around 30 institutions worldwide have yielded a “complete story of the expansion of the universe”, said Will Percival of the University of Waterloo in Ontario, Canada.

Jul 19, 2020

Fully Superconducting Motor Prepares for Testing

Posted by in categories: energy, transportation

Circa 2019 o.o

Extreme power-to-weight ratio and efficiency will be key to electrification of aviation.

Jul 19, 2020

NASA astronauts embark on spacewalk for International Space Station power upgrade

Posted by in categories: energy, space

NASA astronauts Bob Behnken and Chris Cassidy ventured out on their third spacewalk over the past few weeks to replace outdated batteries with more powerful new ones.

Jul 19, 2020

Scientists Create Room-Temperature All Liquid-Metal Batteries

Posted by in categories: energy, materials

A team from the Cockrell School of Engineering at the University of Texas at Austin have developed a new kind of battery that mixes the best of both worlds of liquid- and solid-state batteries. The design is the first all-liquid metal battery that can work at room temperature and is claimed to outperform lithium-ion batteries.

Liquid metal batteries are less susceptible to wearing out than solid batteries because dendrites don’t form and damage the components. The only downside is, most of these batteries need to be heated to at least 240°C (464°F) to keep the metals liquid and the equipment required to do that is bulky and energy-consuming.

For the study, published in the journal Advanced Materials, the UT team examined alloys that could remain liquid at useful temperatures. They decided to use a gallium-indium alloy for the cathode and a sodium-potassium alloy for the anode, which was able to stay liquid at 20°C (68°F). The researchers say it’s the lowest operating temperature ever recorded for a liquid-metal battery.

Jul 18, 2020

Western Digital Releases First EAMR Disks in 18TB, 20TB Capacities

Posted by in category: energy

Western Digital has launched its WD Gold 16TB and 18TB drives using EAMR (Energy Assisted Magnetic Recording) and has a 20TB SMR (Shingled Magnetic Recording) version of the drive on the way. After being a bit slow for several years, drive capacities are growing more quickly again.