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Category: energy – Page 200

General Motors Ultium batteries.

“When you need to put much more energy into the storage form, you get to a point where it’s no longer economical with the batteries, and that’s where the hydrogen comes in,” Freese explained to Green Car Reports. “So there will be a need for both.”

“Grid buffering is more than just the 24-hour cycle…it’s even more than what we talk about with wind, which might flow for a week and then not flow for two weeks,” he argued, noting that if the sources on the grid follow a seasonal nature and loads change quite a bit, it makes sense.

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Scientists have discovered a huge store of hidden water on Mars — and it could be the key to human survival on the Red Planet.

The challenge: Researchers have already discovered ice water on Mars at or near the surface of its frigid poles. They’ve also found evidence of water — either in the form of ice or bound to minerals in the soil — deep underground closer to the Red Planet’s equator.

What they really want, though, is near-surface water closer to the equator. That’s where future Mars explorers are likely to land, and an accessible source of water would be hugely useful for their missions, not only for drinking and growing food, but also for creating oxygen and fuel.

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The next flight on Mars marks the first of 2022 and the nineteenth for NASA’s Ingenuity Mars Helicopter. The current mission goal is to reach the Jezero river delta to aid the Perseverance rover in path planning and scientific discovery. This flight, which will take place no earlier than Friday, Jan. 7, takes the scout vehicle out of the South Séítah basin, across the dividing ridge, and up onto the main plateau. The precise landing target for Flight 19 is near the landing site of Flight 8. Images taken during Flight 9 by the rotorcraft’s high-resolution Return-To-Earth (RTE) camera were used to select a safe landing zone.

While short, the flight has a challenging start due to featureless sandy terrain that the helicopter currently sits on. Initially chosen for the lack of rocks to land safely, the area is actually so devoid of rock that warnings were reported during Flight 18 landing due to insufficient features to track in the vision navigation. As a result, fault protection parameters will be updated to mitigate the risk of a premature landing mid-ascent.

Flight 19 is the third necessary to cover the same ground flown during Flight 9 — in the opposite direction. This slower approach was taken due to the lack of large landing sites in this portion of Séítah and lower atmospheric density in the summer months which requires higher rotor speeds and power draw from the motors. Spanning 207 feet (63 meters), this flight will last about 100 seconds at a groundspeed of 2.2 mph (1 meter per second) and altitude of 33 feet (10 meters) while taking 9 new RTE images. The final act of the flight is to turn nearly 180 degrees to flip the RTE camera to a forward-facing orientation for future flights toward the river delta.

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The US Energy Information Administration (EIA) has forecast in its January Short-Term Energy Outlook that rising electricity generation from clean energy such as solar and wind will reduce generation from fossil fuel-fired power plants over the next two years.

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The EIA is forecasting the share of generation for US clean energy, excluding hydropower, to grow from 13% in 2021 to 17% in 2023.

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CATL warns investors its expansion plans may not keep up with demand and that advanced solid-state batteries won’t be commercially available until 2035 — at the earliest.

The rules that govern stock markets in China are different than they are in other countries. Recently, CATL, the largest battery manufacturer in China, revealed plans to invest enormous amounts of money to increase its production capacity. But first it had to convince the Shenzhen Stock Exchange that its plans were realistic and in line with sound business practices. In response to several questions put to it by the stock exchange, the company said solid-state battery development faces technical difficulties that will prevent mass production from occurring for a long time yet.

According to CnEVPost, CATL was asked to explain the development of technology paths for solid-state batteries, sodium ion batteries, and hydrogen fuel cells, along with the risks that each could pose to its operations and capacity expansion. Solid-state batteries and hydrogen fuel cells have certain technical features and advantages, but there are still unresolved technical problems and barriers to mass production, the company said.

These new technologies are subject to cost economics, performance indicators, and industry chain support constraints, and it will take a long time from technical problem solving and customer certification approval to mass production, CATL said, adding that it is still some distance away from achieving mature commercial applications.

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Such thrusters have been used since the 1970s; however, the Tiangong’s core module is set to become the first crewed spaceship propelled by ion drives. China is betting big on ion thrusters and intends to develop them on a far greater scale for its deep-space missions.

The space station’s core Tianhe module, which will welcome its first astronauts later this month if all goes to plan, is propelled by four ion thrusters, which utilize electricity to accelerate ions as a type of propulsion.

When compared to chemical propulsion, which keeps the International Space Station (ISS) in orbit, ion drives are much more efficient. According to the Chinese Academy of Sciences, the ISS’s thrusters require four tons of rocket fuel to keep it afloat for a year, whereas ion thrusters would require only 882 pounds (400kg) to do the same.

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SciTechDaily.

Structure may reveal conditions needed for high-temperature superconductivity.

When two sheets of graphene are stacked atop each other at just the right angle, the layered structure morphs into an unconventional superconductor, allowing electric currents to pass through without resistance or wasted energy.

This “magic-angle” transformation in bilayer graphene was observed for the first time in 2018 in the group of Pablo Jarillo-Herrero, the Cecil and Ida Green Professor of Physics at MIT.

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Berkeley Lab engineers have developed an all-season smart roof coating that keeps homes warm during the winter and cool during the summer without consuming natural gas or electricity. The all-season roof coating automatically switches from keeping you cool to warm, depending on outdoor air temperature.

The problem with many cool-roof systems currently on the market is that they continue to radiate heat in the winter, which drives up heating costs, explained Junqiao Wu, a faculty scientist who led the study. “Our new material – called a temperature-adaptive radiative coating (TARC) – can enable energy savings by automatically turning off the radiative cooling in the winter, overcoming the problem of overcooling,” he said.

The key to the technology is a strange compound called vanadium dioxide (VO2). In 2017, Wu and his research team discovered that electrons in vanadium dioxide behave like metal to electricity but an insulator to heat. Below about 67 degrees Celsius, vanadium dioxide is also transparent to thermal-infrared light. But once vanadium dioxide reaches 67 degrees Celsius, the material switches to a metal state, becoming absorptive of thermal-infrared light. This ability to switch from one phase to another – in this case, from an insulator to metal – is characteristic of what’s known as a phase-change material.

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