Month: May 2024

Enlarge / A rendering of Silver City Energy Centre, a compressed air energy storage plant to be built by Hydrostor in Broken Hill, New South Wales, Australia. (credit: Hydrostor)

The need for long-duration energy storage, which helps to fill the longest gaps when wind and solar are not producing enough electricity to meet demand, is as clear as ever. Several technologies could help to meet this need.

But which approaches could be viable on a commercial scale?

Toronto-based Hydrostor Inc. is one of the businesses developing long-duration energy storage that has moved beyond lab scale and is now focusing on building big things. The company makes systems that store energy underground in the form of compressed air, which can be released to produce electricity for eight hours or longer.

Enlarge / Orion, the Moon, and Earth in one photo in December 2022. (credit: NASA)

NASA's acting inspector general, George A. Scott, released a report Wednesday that provided an assessment of NASA's readiness to launch the Artemis II mission next year. This is an important flight for the space agency because, while the crew of four will not land on the Moon, it will be the first time humans have flown into deep space in more than half a century.

The report did not contain any huge surprises. In recent months the biggest hurdle for the Artemis II mission has been the performance of the heat shield that protects the Orion spacecraft during its fiery reentry at more than 25,000 mph from the Moon.

Although NASA downplayed the heat shield issue in the immediate aftermath of the uncrewed Artemis I flight in late 2022, it is clear that the unexpected damage and charring during that uncrewed mission is a significant concern. As recently as last week, Amit Kshatriya, who oversees development for the Artemis missions in NASA's exploration division, said the agency is still looking for the root cause of the problem.

Enlarge / When fitted with the optional carbon-fiber appearance pack, the ZDX manages to give off station wagon vibes. But others thought it looked a bit like a hearse. (credit: Jonathan Gitlin)

MONTECITO, Calif.—Acura's first fully electric SUV has just gone on sale. The luxury automaker wants all its vehicles to be zero-emissions by 2040, and parent company Honda is investing billions of dollars in electric vehicle manufacturing in North America to help that happen. But its homegrown EVs aren't quite ready yet, and in the meantime, Acura has resorted to a bit of platform-sharing to fill the gap. Scratch under the skin of the 2024 Acura ZDX Type-S and it's pure General Motors, using the same Ultium platform as the Cadillac Lyriq. But the polish is all Acura, including the software.

The ZDX range starts at $64,500 for the single-motor, rear-wheel drive A-Spec model, which is similar in specs to the Cadillac Lyriq we drove a couple of years ago. But Acura brought the $73,500 2024 ZDX Type-S to the first drive. This is the top-spec model, with a 499 hp (372 kW), 544 lb-ft (738 Nm) twin-motor, all-wheel drive powertrain, air suspension, and rather large Brembo brakes.

It’s no lightweight

Those last two features are highly welcome, because they help control the ZDX Type-S's considerable mass—its curb weight is a hefty 6,052 lbs (2,745 kg). Air springs are fast becoming the default choice for premium EVs, and it's quite remarkable how quickly they can react to weight transfer. But the steering lacks feel and makes up for it with weight, and maneuvers like avoiding road debris on the highway will give you a definite reminder that you're driving nearly 3 tons of vehicle. You do get a smooth ride thanks to those air springs, though.