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Vineyard Wind in Massachusetts is going to pilot a secondary bubble curtain – here’s what that is and why it’s great for the undersea environment.

Vineyard Wind

The 800 MW Vineyard Wind 1 is a 50-50 joint venture between clean energy company Avangrid and Copenhagen Infrastructure Partners. The $3.5 billion offshore wind farm will feature 62 Haliade-X 13 MW turbines, and it will supply clean energy for over 400,000 homes and businesses in Massachusetts and reduce carbon emissions by over 1.6 million tons per year. It’s expected to come online at the end of this year.

Vineyard Wind is now working on the secondary bubble curtain pilot with Massachusetts- and Connecticut-based ThayerMahan, a firm that specializes in seabed surveys, acoustic mitigation, and monitoring.

ThayerMahan, which partners with German bubble curtain tech leader Hydrotechnik-Luebeck – will be the first US company to provide bubble curtain services to the US offshore wind industry.

Bubble curtains

It’s extremely noisy when foundation structures such as monopiles or jacket foundations are driven into the seabed using large hydraulic hammers. The noise and vibrations created during that foundation work can be harmful to marine life, particularly to fish and marine mammals such as dolphins and whales.

That’s where bubble curtains come in.

A bubble curtain is underwater noise insulation that involves releasing a stream of air bubbles from a perforated hose or pipe on the seafloor.

The bubble curtain reduces the noise and vibrations that would otherwise propagate through the water. The bubbles absorb the sound energy and also create a barrier that reflects sound waves back toward the source.

A secondary bubble curtain, which is what Vineyard Wind is piloting, is a second layer of bubbles released at a greater distance from the pile. It’s created by placing additional air hoses or pipes in a circle around the primary bubble curtain, releasing bubbles at a lower pressure and higher flow rate. The primary and secondary bubble curtains work together to reduce the impact of noise and vibration during construction.

Bubble curtains are relatively inexpensive to install and can be easily deployed and removed as needed.

With credit to Petter Neumann, this animated video demonstrates how bubble curtains work:

Read more: The first huge piece of the first major US offshore wind farm is ready

Photo: Vineyard Wind


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E-quipment highlight: Komatsu PC365-11 hybrid excavator

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E-quipment highlight: Komatsu PC365-11 hybrid excavator

Thanks to a clever, fully electric swing system and “boom up” power assist features, the big PC365-11 hybrid excavator from Komatsu promises better performance and serious fuel savings compared to conventional diesel machines.

Komatsu says its PC365-11 hybrid excavator uses a “boom-up” power assist feature that captures and stores kinetic energy during different operation cycles, then taps into that power to provide an extra energy boost when needed. The result is 15% more productivity and a 20% improvement in fuel efficiency when compared to non-hybrid excavators in ~40 ton class.

“The PC365LC-11 was engineered for excellence in multifunction applications by leveraging its innovative electric powertrain system to boost job site productivity while reducing fuel consumption,” says Matthew Moen, Komatsu’s product manager. “To highlight these performance enhancements, we’re emphasizing the concept of ‘multifunction plus’ as the defining feature of this machine.”

How it works


Komatsu hybrid explainer; via Komatsu.

Komatsu’s hybrid system replaces the conventional hydraulic swing function with a fully electric swing motor that draws power from an ultracapacitor (as opposed to a battery) energy storage unit. As excavator slows or stops swinging, something like a regenerative braking system captures the kinetic energy that would normally be lost as heat and stores it in the capacitor. Once there, the stored energy can be quickly released to power the swing motor or assist the engine, delivering up to an extra 70 hp when needed to support heavy lifting or digging cycles.

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And, thanks to Komatsu’s proprietary software, all of this energy capture and reuse happens automagically during normal work, without the need for external charging. The fuel savings happen because removing the hydraulic load from the ICE engine allows it to run at an ultra-low idle, while the productivity comes from the greater power and overall speed of the electric operations vs. conventional hydraulics.

Electrek’s Take


Komatsu lunar excavator; image by the author.

Trust me when I tell you that Komatsu didn’t wake up one day and decide to build a capacitor-based hybrid crane. One of their customers had the idea and came to them, promising orders. That’s what Komatsu does – from undersea remote control dozers to lunar mining rigs (above), if you bring Komatsu an order, they will absolutely find a way to fill it.

As for PC365-11 hybrid excavator, it’s packed with clever tech, overall – offering significant fuel, emissions, and TCO reductions without dramatically changing the operational logistics of an existing fleet’s operations. That’s all the sales pitch it needs.

SOURCE: Komatsu, via Equipment World.


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Five for Five: Kia PV5 scores 5 star European safety rating

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Five for Five: Kia PV5 scores 5 star European safety rating

For serious fleet buyers, safety isn’t a “nice-to-have,” it’s an absolute must – and Kia’s new PV5 electric van meets that need with a positively stellar, five-star safety rating on the tough European NCAP safety test.

The new “do-it-all” Kia PV5 showed strong performance across a number of key safety categories, including Occupant Protection, Safety Assist/Crash Avoidance, and Post-Crash Safety. The PV5’s robust suite of standard ADAS technologies that includes AEB, Lane Support System, and Speed Assistance System also helped the new electric work van to deliver top marks in the NCAP’s “real world” test scenarios.

The PV5 opens a new chapter in practical, electrified mobility, offering generous space and modular versatility for everyday use,” explains Sangdae Kim, Executive Vice President and Head of the (relatively) new PBV Business Division at Kia. “Achieving the top Euro NCAP five-star rating is clear validation of its safety performance and will serve as strong momentum as Kia expands its PBV lineup across Europe.”

The Euro NCAP tests highlighted the strong performance of a number of the PV5’s ADAS features, specifically calling out the following:

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  • Demonstrated strong responsiveness in vehicle-to-vehicle scenarios
  • Provides additional protection for pedestrians behind the vehicle
  • Avoided collisions in most pedestrian and cyclist test cases

The Kia PV5 slots into familiar territory for US buyers, landing roughly in the same size class as the Ford Transit Connect or Ram ProMaster City, with ~180 cubic feet of interior cargo space available, which is plenty to make it attractive for last-mile delivery and trade work in tight urban markets.

Globally, the PV5 is offered with a number of battery options, including a smaller 43.3 kWh Lithium-Iron-Phosphate (LFP) pack, as well as larger Nickel-Cobalt-Manganese (NCM) packs at 51.5 kWh and 71.2 kWh. The longest-range versions are good for about 250 miles of estimated range – more than enough for Kia to make a case for it as a practical, city-focused alternative to much larger (and pricier) electric vans.

Larger vans, by the way, that may not have that 5 star Euro NCAP rating.

Kia PV5


SOURCE | IMAGES: Kia; photo by Scooter Doll.


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Waymo pauses robotaxi service in San Francisco after blackout chaos — Musk says Tesla car service unaffected

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Waymo resumes robotaxi service in San Francisco after blackout chaos — Musk says Tesla car service unaffected

Alphabet-owned Waymo has suspended its driverless ride-hail service in the San Francisco Bay Area after blackouts plagued the city Saturday afternoon.

“We have temporarily suspended our ride-hailing services in the San Francisco Bay Area due to the widespread power outage,” a Waymo spokesperson tells CNBC. “Our teams are working diligently and in close coordination with city officials, and we are hopeful to bring our services back online soon. We appreciate your patience and will provide further updates as soon as they are available.”

Waymo notice of service outage in San Francisco.

Source: Waymo

As power outages spread yesterday, videos shared on social media appeared to show multiple Waymo vehicles stalled in traffic in different parts of the city.

San Francisco resident Matt Schoolfield said he saw at least three Waymo autonomous vehicles stopped in traffic Saturday around 9:45 p.m. local time, including one he photographed on Turk Boulevard near Parker Avenue.

“They were just stopping in the middle of the street,” Schoolfield said.

A Waymo vehicle stuck between Parker and Beaumont, on the north side of Turk Boulevard in San Francisco.

Credit: Matt Schoolfield

The power outages began around 1:09 p.m. Saturday and peaked roughly two hours later, affecting about 130,000 customers, according to Pacific Gas and Electric. As of Sunday morning, about 21,000 customers remained without power, mainly in the Presidio, the Richmond District, Golden Gate Park and parts of downtown San Francisco.

PG&E said the outage was caused by a fire at a substation that resulted in “significant and extensive” damage, and said it could not yet provide a precise timeline for full restoration.

San Francisco Mayor Daniel Lurie said in a 9 p.m. update on X that police officers, fire crews, parking control officers and city ambassadors were deployed across affected neighborhoods as transit service gradually resumed. “Waymo has also paused service,” Lurie said.

Amid the disruption, Tesla CEO Elon Musk posted on X: “Tesla Robotaxis were unaffected by the SF power outage.”

Unlike Waymo, Tesla does not operate a driverless robotaxi service in San Francisco.

Tesla’s local ride-hailing service uses vehicles equipped with “FSD (Supervised),” a premium driver assistance system. The service requires a human driver behind the wheel at all times.

According to state regulators — including the California Department of Motor Vehicles and California Public Utilities Commission — Tesla has not obtained permits to conduct driverless testing or services in the state without human safety supervisors behind the wheel, ready to steer or brake at any time.

Tesla is vying to become a robotaxi titan, but does not yet operate commercial, driverless services. Tesla’s Robotaxi app allows users to hail a ride; however, its vehicles currently have human safety supervisors or drivers on board, even in states where the company has obtained permits for driverless operations.

Waymo, which leads the nascent industry in the West, is Tesla’s chief competitor in AVs, along with Chinese players like Baidu-owned Apollo Go.

The outage-related disruptions in San Francisco come as robotaxi services are becoming more common in other major U.S. cities. Waymo is among a small number of companies operating fully driverless ride-hailing services for the public, even as unease about autonomous vehicles remains high.

A survey by the American Automobile Association earlier this year found that about two-thirds of U.S. drivers said they were fearful of autonomous vehicles.

The Waymo pause in San Francisco indicates cities are not yet ready for highly automated vehicles to inundate their streets, said Bryan Reimer, a research scientist at the MIT Center for Transportation and co-author of “How to Make AI Useful.”

“Something in the design and development of this technology was missed that clearly illustrates it was not the robust solution many would like to believe it is,” he said.

Reimer noted that power outages are entirely predictable. “Not for eternity, but in the foreseeable future, we will need to mix human and machine intelligence, and have human backup systems in place around highly automated systems, including robotaxis,” he said.

State and city regulators will need to consider what the maximum penetration of highly automated vehicles should be in their region, Reimer added, and AV developers should be held responsible for “chaos gridlock,” just as human drivers would be held responsible for how they drive during a blackout.

Waymo did not say when its service would resume and did not specify whether collisions involving its vehicles had occurred during the blackout.

Tesla and the National Highway Traffic Safety Administration did not immediately respond to requests for comment.

This is a developing story. Please check back for updates.

CNBC’s Riya Bhattacharjee contributed reporting.

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