Greece was entirely powered by renewables for the first time in its history last week, according to the country’s independent power transmission operator (IPTO).
On Friday (7 October), for a period of around five hours, the country was running off entirely renewable power, reaching a record high of 3,106MWh at eight o’clock (GMT).
“For the first time in the history of the Greek electricity system, the demand was covered 100% from renewable energy sources,” its IPTO wrote.
Tesla has updated its in-car energy app to give a comparison between real energy use and the projected range, and it even gives you range advice to get closer to the optimal range.
Range calculations are difficult regardless of the type of powertrain – electric or internal combustion engine.
There are just so many factors that can affect the efficiency of a vehicle on a road that it is hard to determine how far it can go on a full battery pack or tank of gas.
Siemens Gamesa’s 14–222 DD offshore wind turbine prototype has, according to the Spanish-German wind giant today, set a world record for the most power output by a single wind turbine in a 24-hour period: 359 megawatt-hours.
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This would be enough energy, according to the company, for a mid-sized electric vehicle – think a Tesla Model 3 – to drive around 1.12 million miles (1.8 million km).
The gamma ray burst is the brightest ever detected in X-rays, according to scientists, and could shed light on the most energetic phenomena in space.
Their results apply only to enhanced geothermal plants, like the ones Fervo and other companies such as Cambridge, Mass.–based Quaise Energy and Seattle-based AltaRock Energy are developing.
Conventional geothermal systems drill wells into naturally occurring hydrothermal reservoirs. But these pockets of hot water deep underground do not exist everywhere. In the United States, for instance, they are mostly located in the west.
Enhanced geothermal systems (EGS) get around this geographical limitation by creating artificial reservoirs. Developers create fractures in hot, dry rock formations by drilling into or melting the rock, and then injecting water into the fissures. Production wells bring the heated water up for producing electricity. “For scales necessary to contribute to national or global electricity decarbonization, we need to be able to extract geothermal heat outside of conventional formations,” Ricks says.
Osaka Metropolitan University scientists have successfully developed a new positive electrode material Na2FeS2, consisting of sodium, iron, and sulfur. During testing, batteries using the Na2FeS2 positive electrode had a high energy storage capacity and could be charged and discharged for more than 300 cycles. Because the Na2FeS2 is made of abundant inexpensive elements, it is expected to be used in all-solid-state sodium batteries with higher capacity and lower costs.
The demand for high energy density rechargeable batteries, such as lithium-ion batteries, increases every year, as society shifts toward becoming carbon neutral. Sodium-ion batteries—which have a resource advantage over lithium-ion batteries —are attracting more attention, as cheap new high-performance materials continue to be developed.
A research group led by Associate Professor Atsushi Sakuda, President Masahiro Tatsumisago, and Professor Akitoshi Hayashi, at the Graduate School of Engineering, Osaka Metropolitan University, has successfully developed a new positive electrode, made of Na2FeS2, for all-solid-state sodium batteries. The batteries have a high energy storage capacity, high reversibility and use inexpensive elements that are readily available.
The incredible power of the Sun has been captured in a stunning video showing a massive coronal magnetic ejection being thrown into space.
Engineers from UNSW Sydney have successfully converted a diesel engine to run as a hydrogen-diesel hybrid engine—reducing CO2 emissions by more than 85% in the process.
The team, led by Professor Shawn Kook from the School of Mechanical and Manufacturing Engineering, spent around 18 months developing the hydrogen-diesel direct injection dual-fuel system that means existing diesel engines can run using 90% hydrogen as fuel.
The researchers say that any diesel engine used in trucks and power equipment in the transportation, agriculture and mining industries could ultimately be retrofitted to the new hybrid system in just a couple of months.
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“The Ce electrolyte is highly oxidative, which poses a challenge towards the stability of anion membrane,” Daoud said. “Thus, the stability and selectivity of anion membrane require further improvement.”
The device achieved a voltage plateau of 2.3 V at 20 mA cm − 2, energy efficiency of 71.3% at 60 mA cm − 2, and a record average Coulombic efficiency of 94% during cycling.
