Category: power

The residential sector represents 97% of all U.S. solar installations. This sector has consistently set new records for annual installations over the past several years, achieving new highs for five straight years and in 10 out of the last 12 years. The significant growth in residential solar can be attributed to its proven value as an investment for homeowners who wish to manage their energy costs more effectively. California is the frontrunner with 2 million solar installations, though recent state policies have significantly damaged its rooftop solar market. Meanwhile, other states are experiencing rapid growth. For example, Illinois, which had only 2,500 solar installations in 2017, now boasts over 87,000. Similarly, Florida has seen its solar installations surge from 22,000 in 2017 to 235,000 today. By 2030, 22 states or territories are anticipated to surpass 100,000 solar installations. The U.S. has enough solar installed to cover every residential rooftop in the Four Corners states of Colorado, Utah, Arizona, and New Mexico.

Some 11,000 projects totaling 2,600 GW of capacity are in planning, waiting to break ground, or connect to the grid. But they’re stymied by the need for costly upgrades, or simply waiting for review. The frustrations are many. Each proposed project undergoes a lengthy grid-impact study and assessed the cost of necessary upgrades. Each project is considered in isolation, regardless of whether similar projects are happening nearby that could share the upgrade costs or auger different improvements. The planning process tends to be reactive — examining only the applications in front of them — rather than considering trends over the coming years. It’s a first-come, first-served queue: if one project is ready to break ground, it must wait behind another project that’s still securing funding or permitting.

Two years in development, the dryly-named Improvements to Generator Interconnection Procedures and Agreements directs utility operators to plan infrastructure improvements with a 20-yr forecast of new energy sources and increased demand. Rather than examining each project in isolation, similar projects will be clustered and examined together. Instead of a First-Come, First-Served serial process, operators will instead examine First-Ready, allowing shovel-ready projects to jump the queue. The expectation is that these new rules will speed up and streamline the process of developing and connecting new energy projects through more holistic planning, penalties for delays, sensible cost-sharing for upgrades, and justification for long-term investments.

Five times the size of Paris. Visible from space. The world’s biggest energy plant. Enough electricity to power Switzerland. The scale of the project transforming swathes of barren salt desert on the edge of western India into one of the most important sources of clean energy anywhere on the planet is so overwhelming that the man in charge can’t keep up. “I don’t even do the math any more,” Sagar Adani told CNN in an interview last week.

Adani is executive director of Adani Green Energy Limited (AGEL). He’s also the nephew of Gautam Adani, Asia’s second richest man, whose $100 billion fortune stems from the Adani Group, India’s biggest coal importer and a leading miner of the dirty fuel. Founded in 1988, the conglomerate has businesses in fields ranging from ports and thermal power plants to media and cements. Its clean energy unit AGEL is building the sprawling solar and wind power plant in the western Indian state of Gujarat at a cost of about $20 billion.

It will be the world’s biggest renewable park when it is finished in about five years, and should generate enough clean electricity to power 16 million Indian homes… [T]he park will cover more than 200 square miles and be the planet’s largest power plant regardless of the energy source, AGEL said.

CNN adds that the company “plans to invest $100 billion into energy transition over the next decade, with 70% of the investments ear-marked for clean energy.”

The best commercial lithium-ion batteries…have a service life of up to eight years. Batteries are usually charged with a constant current flow. But is this really the most favorable method? A new study by Prof. Philipp Adelhelm’s group at HZB and Humboldt-University Berlin answers this question clearly with “no.” [In collaboration with teams including the Technical University of Berlin.]

Part of the battery tests were carried out at Aalborg University. The batteries were either charged conventionally with constant current (CC) or with a new charging protocol with pulsed current (PC). Post-mortem analyses revealed clear differences after several charging cycles: In the CC samples, the solid electrolyte interface (SEI) at the anode was significantly thicker, which impaired the capacity… PC-charging led to a thinner SEI interface and fewer structural changes in the electrode materials.

The study is published in the journal Advanced Energy Materials and analyzes the effect of the charging protocol on the service time of the battery, according to the article. “The frequency of the pulsed current counts…”

“Doubling the life of your EV’s battery or even your smartphone’s battery is no small thing,” says Slashdot reader NewtonsLaw…

To maintain efficient operation, fuel cells require a high Pt loading (greater platinum content), which significantly ups the costs of fuel cells. A quick look online found market prices for platinum of $29.98 per gram, or $932.61 per ounce, at the time of writing. The researchers found that adding caffeine can improve the ORR activity of platinum electrodes 11 fold, making the reaction more efficient. If you are wondering (as we were) how they came to be experimenting with this, the paper explains that modifying electrodes with hydrophobic material is known to be an effective method for enhancing ORR. Caffeine is less toxic than other hydrophobic substances, and it activates the hydrogen evolution and oxidation reactions of Pt nanoparticles and caffeine doped carbons. Got that?

Chiba University’s work was led by Professor Nagahiro Hoshi at the Department of Applied Chemistry and Biotechnology. He explained that the researchers found a notable improvement in the electrode’s ORR activity with an increase in caffeine concentration in the electrolyte. This forms a thin layer on the electrode’s surface, effectively preventing the formation of PtOH, but the effect depends on the orientation of the platinum atoms on the electrode’s surface. The paper refers to these as Pt(100), Pt(110) and Pt(111), with the latter two showing increased ORR activity, while there was no noticeable effect with Pt(100). The researchers do not explain if this latter effect might be a problem, but instead claim that their discovery has the potential to improve the designs of fuel cells and lead to more widespread adoption.

“The massive energy consumption of cryptocurrency mining and its rapid growth in the United States threaten to undermine progress towards achieving climate goals, and threaten grids, communities and ratepayers,” said Mandy DeRoche, deputy managing attorney of the clean energy program at Earthjustice. Until now, a lack of publicly available information has only benefited an “industry that has thrived in the shadows,” DeRoche added.

The crypto mining industry, however, has claimed it is the victim of a “politically motivated campaign” by Joe Biden’s administration and has, for now, succeeded in averting a survey that it contends is unfairly onerous. “This is an attack against legitimate American businesses with the administration feigning an emergency to score political points,” said Lee Bratcher, president the Texas Blockchain Council, one of the groups that sued to stop the survey. “The White House has been clear that they desire to ‘to limit or eliminate’ bitcoin miners from operating in the United States. “Although bitcoin is resilient and cannot be banned, the administration is seeking to make the lives of bitcoin miners, their employees, and their communities too difficult to bear operating in the United States. This is deeply concerning.”

Besides opening up the market to competition, utilities don’t want to lose control over regional infrastructure, writes IEEE Spectrum. “[I]nterregional lines threaten utility companies’ dominance over the nation’s power supply. In the power industry, asset ownership provides control over rules that govern energy markets and transmission service and expansion. When upstart entities build power plants and transmission lines, they may be able to dilute utility companies’ control over power-industry rules and prevent utilities from dictating decisions about transmission expansion.”

The article begins by noting that “The United States is not building enough transmission lines to connect regional power networks. The deficit is driving up electricity prices, reducing grid reliability, and hobbling renewable-energy deployment. ”

Utilities can stall transmission expansion because out-of-date laws sanction these companies’ sweeping control over transmission development…
One of the main values of connecting regional networks is that it enablesâ”and is in fact critical forâ”incorporating renewable energy… Plus, adding interregional transmission for renewables can significantly reduce costs for consumers. Such connections allow excess wind and solar power to flow to neighboring regions when weather conditions are favorable and allow the import of energy from elsewhere when renewables are less productive.

Even without renewables, better integrated networks generally lower costs for consumers because they reduce the amount of generation capacity needed overall and decrease energy market prices. Interregional transmission also enhances reliability,particularly during extreme weather…

Addressing the transmission shortage is on the agenda in Washington, but utility companies are lobbying against reforms.

The article points out that now investors and entrepreneurs “are developing long-distance direct-current lines, which are more efficient at moving large amounts of energy over long distances, compared with AC,” and also “sidestep the utility-dominated transmission-expansion planning processes.”

They’re already in use in China, and are also becoming Europe’s preferred choice…

Electrek argues that while extreme cold may affect chargers, “it mainly gets attention because it’s a new technology and it fails for different reasons than gasoline vehicles in the cold.”

Viking, a road assistance company (think AAA), says that it responded to 34,000 assistance requests in the first 9 days of the year. Viking says that only 13% of the cases were coming from electric vehicles (via TV2 — translated from Norwegian) [“13 percent of the cases with starting difficulties are electric cars, while the remaining 87 percent are fossil cars…”]

To be fair, this data doesn’t adjust for the age of the vehicles. Older gas-powered cars fail at a higher rate than the new ones and electric vehicles are obviously much more recent on average.

Thanks to long-time Slashdot reader Geoffrey.landis for sharing the article.

The Kapolei Energy Storage system actually began commercial operations before Christmas on the industrial west side of Oahu, according to Plus Power, the Houston-based firm that developed and owns the project. Now, Kapolei’s 158 Tesla Megapacks are charging and discharging based on signals from utility Hawaiian Electric. The plant’s 185 megawatts of instantaneous discharge capacity match what the old coal plant could inject into the grid, though the batteries react far more quickly, with a 250-millisecond response time. Instead of generating power, they absorb it from the grid, ideally when it’s flush with renewable generation, and deliver that cheap, clean power back in the evening hours when it’s desperately needed.

The construction process had its setbacks, as did the broader effort to replace the coal plant with a roster of large-scale clean energy projects. The Kapolei battery was initially intended to come online before the coal plant retired. Covid disrupted deliveries for the grid battery industry across the board, and Kapolei’s remote location in the middle of the Pacific Ocean didn’t make things easier. By summer 2021, Plus Power was hoping to complete Kapolei by the end of 2022, but it ended up taking another year. Even then, it has joined the grid before several of the other large solar and battery projects slated to replace the coal plant’s production with clean power.