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Incorporating energy efficiency measures can reduce the amount of storage needed to power the nation’s buildings entirely with renewable energy, according to analysis conducted by researchers at the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL).

As more communities plan to eventually rely on 100% renewable energy, the researchers offer a strategy that could guide their paths — one that shifts away from long-duration storage.

“Minimizing long-duration storage is a key element in trying to achieve the target cost-effectively,” said Sammy Houssainy, co-author with William Livingood of a new paper that outlines an approach to 100% renewables. The research paper, “Optimal Strategies for a Cost-Effective and Reliable 100% Renewable Electrical Grid,” appears in the Journal of Renewable and Sustainable Energy.

The researchers considered solar and wind as the source of renewable energy, given that most plans for meeting the 100% target take those into account. They also used the Department of Energy’s EnergyPlus and OpenStudio building energy modeling tools to simulate energy demand, considering such factors as building size, age, and occupancy type. Data from the U.S. Energy Information Administration informed the scientists about the existing building stock characteristics and energy load used by the buildings.

Further, the researchers separated the country into five climate zones, ranging from the hot and humid (Tampa, Florida) to the very cold (International Falls, Minnesota). The other zones encompassed the cities of New York, El Paso, and Denver. Knowing the extremes of heating and cooling demands in each zone enabled the researchers to select the appropriate mix of renewable power sources to minimize any needed storage.

While varying definitions exist in the literature, for purposes of this study the researchers define long-duration storage as energy storage systems that meet electricity demands for more than 48-hour durations. Therefore, long-duration energy storage provides power days or months after the electricity is generated. However, most long-duration storage technologies are either immature or not available everywhere. The two NREL researchers calculated reaching the last 75% to 100% of renewable energy would result in significant increases in costs associated with long-duration energy storage. Instead of focusing on storage, the researchers emphasized the optimal mix of renewable resources, oversized generation capacities, and investments in energy efficiency. The researchers note that multiple pathways exist to reach 100% renewable and, as the costs and performance of technologies change, new pathways will emerge, but they identified a key pathway that is achievable today.

They also determined that oversizing renewable capacities by a factor of 1.4 to 3.2 and aiming for 52% to 68% in energy savings through building energy-efficiency measures lead to cost-optimal paths depending on region of the country. Houssainy said making homes and offices more energy efficient reduces the amounts of renewable resources needed, decreases the amount of storage, and cuts transmission costs, ultimately supporting the implementation of a carbon-free energy system.

“What’s included in the paper is really a multistep process to follow,” Livingood said. “That process is applicable to large cities, as well small cities. Now, the end result will change, city to city, as this multistep process is followed to cost-optimally achieve the target.”

For example, Tampa would generate all of its electricity from solar panels, while International Falls would receive 100% from wind turbines, the researchers calculated, in order to have the least reliance on storage.

“It is not intended to replace the need for site-specific, detailed engineering design and planning processes for buildings, electric grid, and energy infrastructure,” Livingood said, “but we believe that our novel calculation methodology yields overarching concepts and conclusions that are broadly relevant and applicable. For cost-effectively achieving 100% renewable scenarios, our newly developed calculation methodology provides general principles that help guide these detailed engineering design and planning processes.”

DOE’s Building Technologies Office funded the research, under the advisement of Andrew Burr (formerly DOE).

NREL is the U.S. Department of Energy’s primary national laboratory for renewable energy and energy efficiency research and development. NREL is operated for DOE by the Alliance for Sustainable Energy LLC.

Article courtesy of National Renewable Energy Laboratory.

 

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Reyes Beverage Group adds 29 Freightliner electric semi trucks to California fleet

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Reyes Beverage Group adds 29 Freightliner electric semi trucks to California fleet

Daimler Truck North America has helped alcohol distributor Reyes Beverage Group deploy fully 29 zero-emission Freightliner eCascadia Class 8 electric semi trucks in its California delivery fleet.

Reyes Beverage Group (RGB) plans to deploy the first twenty Freightliner electric semi trucks at its Golden Brands – East Bay and Harbor Distributing – Huntington Beach warehouses, marking the first phase in the company’s transition to a fully zero emission truck fleet by 2039. An additional nine eCascadia Class 8 HDEVs are scheduled for delivery to RBG’s Gate City Beverage – San Bernardino warehouse before the end of 2024.

RBG’s decision to adopt the Freightliner eCascadia builds on its recent transition to renewable diesel and its ongoing idle-time reduction program. These electric vehicles (EVs) “go electric” will contribute significantly toward the company’s stated goal of reducing its carbon emissions 60 percent by 2030. These 2 trucks will save some 98,000 gallons of diesel fuel annually, and avoid putting nearly 700 metric tons of carbon dioxide and other harmful emissions into California’s air each year.

“We are excited to be among the first in our industry to adopt these electric vehicles,” explains Tom Reyes, President of RBG West. “This is a significant step toward our sustainability goals and ensuring compliance with state regulation as we transition our fleet to EV.”

Freightliner’s eCascadia electric semi trucks offer a number of battery and drive axle configurations with ranges between 155 and 230 miles, depending on the truck specification, to perfectly match customers’ needs without compromising on performance and load capacity. RBG’s Freightliner eCascadia tractors will rely on electric charging stations installed at each facility, allowing them to recharge to 80% capacity in as little as 90 minutes for RGB’s trucks, which feature a typical driving range of 220 miles as equipped.

Electrek’s Take

Food and beverage trucks operate everywhere – not just at the ports but in urban population centers, too. That means they’re pumping out harmful emissions right where a lot of people live and work, and that’s no bueno, making the electrification of these vehicles a no brainer for anyone who cares about the quality of life of the people who live and work near them.

SOURCE | IMAGES: Daimler Trucks.

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Enwin Utilities adds $1 million Terex electric bucket truck to fleet [video]

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Enwin Utilities adds $1 million Terex electric bucket truck to fleet [video]

The Windsor, Ontario utility says it’s driving towards a more sustainable future after adding a dozen new electric vehicles to its fleet – including a state-of-the-art, 55-foot Terex electric bucket truck.

Based on a Class 7 (33,000 lb. GVWR) International eMV Series BEV, the Terex EV takes the eMV’s 291 kWh battery and adds the Terex Optima 55-foot aerial device and HyPower SmartPTO system to create a fully electrified utility service vehicle that can do anything its diesel counterparts can do while offering better, safer working conditions for utility crews.

“We’ve got 12 EVs,” said Gary Rossi, president and CEO, Enwin Utilities. That number represents fully 10% of the utility’s entire vehicle fleet. “Our centerpiece is our electric 55-feet bucket truck. It’s very quiet,” continues Rossi. “So (the truck) allows us, our crews, to communicate better. It’s not as loud in the community when they’re doing repairs in someone’s backyard.”

That notion is echoed by Terex, itself. The company says its HyPower SmartPTO (power take off), which replaces a mechanical PTO, avoids a loud idling engine while reducing workers’ exposure to toxic exhaust fumes.

The utility company says the new electric bucket truck cost it almost $1 million Canadian – but while that might sound like a lot, Rossi says the price is similar to what a similarly-optioned ICE version of the bucket truck would cost.

“It’s all about building Windsor’s future and literally plugging into the battery factory down the road that is being constructed and showing that Windsor is a leader on this front,” says Drew Dilkens, Mayor of Windsor. “I don’t own an internal combustion engine vehicle,” adds Mayor Wilkins. “I only own two electric cars. My wife and I, we made the change starting in 2019 and I can’t see myself ever going back.”

CTV News Windsor

Enwin says its commitment to clean energy extends beyond its vehicle fleet. The company recently unveiled a massive MW solar rooftop net metering facility at its Rhodes Drive headquarters with over 3,000 solar panels. The site, one of Canada’s largest solar installations, generates enough clean electricity to power 300 homes annually.

SOURCE | IMAGES: Terex; Enwin via CTV News Windsor.

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Damen sets a world record for most powerful electric tugboat

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Damen sets a world record for most powerful electric tugboat

Built by Damen Shipyards and the first fully electric tugboat to be deployed in the Middle East, the new RSD-E Tug 2513 Bu Tinah put in its record-breaking performance took place at Khalifa Port during ADIPEC, the world’s largest energy conference.

The RSD-E Tug 2513 is based on the already efficient hull design of the standard, diesel-powered RSD Tug 2513, but its new, fully electric propulsion arrangement enables it to offer zero emissions operations in situations where oil or fuel leakage would be – let’s say especially bad.

But, while the “clean” aspect of all-electric operation is obvious, its Guinness World Record of performance shows that the Damen RSD-E Tug 2513 is up to whatever task its owners put to it.

“This Guinness World Record achievement demonstrates that the transition to alternative energy does not come at the cost of performance,” explains Maritime & Shipping Cluster, AD Ports Group, Captain Ammar Mubarak Al Shaiba. “We are very proud that the first electric tug in the Middle East is also making waves on a global level with this accolade and the fact that in parallel it is improving the sustainability of our operations alongside cost efficiencies in terms of overall fuel saving is extremely important. This vessel is now a key component of our Marine Services fleet and our electrification strategy.”

To earn its record, the the Damen RSD-E Tug 2513 Bu Tinah recorded an average high peak bollard pull of 78.2 tonnes (about 86 ‘Murican tons). The record-setting tugboat can undertake a minimum of two towage operation on a single charge, and can be recharged on a marine DC fast charger in just two hours.

Electrek’s Take

Electric tug achieves Guinness World Record
Damen RSD-E Tug; via Damen.

We’ve come a long way since 2021, when a 6MW electric tugboat was pulling about 50 tonnes of bollard weight. A nearly 50% jump in performance without a similar weight or mass gain is a sign of advancing technology – and we are here for it.

SOURCE | IMAGES: Damen.

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