Archive for the ‘solar power’ category: Page 14

Aug 24, 2022

Software Turns Promise Up for Offshore Wind

Posted by in categories: employment, government, solar power, space, sustainability

A radical new idea for offshore wind turbines would replace tall unwieldy towers that had blades on top with lightweight, towerless machines whose blades resemble the loops of a whisk. Now new software can help optimize these unusual designs to help make them a reality, researchers say.

This new work comes as the U.S. government plans to boost offshore wind energy. In March, the White House announced a national goal to deploy 30 gigawatts of new offshore wind power by 2030. The federal government suggested this initiative could help power more than 10 million homes, support roughly 77,000 jobs, cut 78 million tonnes in carbon emissions, and spur US $12 billion in private investment per year. As part of this new plan, in June, the White House and eleven governors from along the East Coast launched a Federal-State Offshore Wind Implementation Partnership to further develop the offshore wind supply chain, including manufacturing facilities and port capabilities.

One reason offshore wind is attractive is the high demand for electricity on the coasts. People often live far away from where onshore wind is the strongest, and there is not enough space in cities for enough solar panels to power them, says Ryan Coe, a mechanical engineer in Sandia National Laboratories’ water-power group in Albuquerque.

Aug 23, 2022

Dubai solar site still aiming for 5 GW by 2030

Posted by in categories: solar power, sustainability

It was designed to reduce carbon dioxide emissions by over 6.5 million tons each year.

The Dubai Electricity and Water Authority (DEWA) is aiming for 5 GW by 2030 in the Mohammed bin Rashid Al Maktoum Solar Park — the largest single-site solar park in the world.

Mohammed Bin Rashid Al Maktoum Solar Park project constitutes one of the key pillars of the Dubai Clean Energy Strategy 2050 and the Dubai Net Zero Carbon Emissions Strategy to provide 100 percent of Dubai’s total power capacity from clean energy sources by 2050.

Continue reading “Dubai solar site still aiming for 5 GW by 2030” »

Aug 22, 2022

Ingenuity Team Spun Up for Upcoming Flight 30

Posted by in categories: health, solar power, space, sustainability

It’s been over a month since we last updated our blog about our winter warrior, currently around 96 million miles away. At present the team is preparing for Ingenuity’s next flight, which could take place as early as this weekend. This 30th sortie will be a short hop – which will check out our system’s health after surviving 101 sols of winter, collect landing delivery data in support of NASA’s Mars Sample Return Campaign, and potentially clear off dust that has settled on our solar panel since Flight 29.

What’s Happened Lately

It’s still winter at Jezero Crater, which means overnight temperatures are as low as -124 degrees Fahrenheit (−86 Celsius). Winter at Mars also means the amount of solar energy hitting our solar panel remains below what is needed to maintain charge in our batteries both day and night. However, during the day the panel continues to create enough charge to make shorter hops possible. That’s what we did on Flight 29 and is our plan for Flight 30.

Aug 22, 2022

Controlling the crystals for a 17.96% efficient perovskite solar cell

Posted by in categories: solar power, sustainability

Scientists in Taiwan demonstrated a new way to produce high-purity lead-iodide, as a precursor material for a perovskite solar cell. By using temperature to better control the orientation of crystals, the group was able to show much higher efficiencies when the precursor was used to fabricate a perovskite layer and subsequently a working solar cell.

Aug 21, 2022

Europe is seriously considering a major investment in space-based solar power

Posted by in categories: Elon Musk, solar power, space, sustainability

“It’s the stupidest thing ever,” Elon Musk said several years ago.

European Space Agency’s (ESA) director general has proposed the development of Europe’s first space-based solar power system to be constructed in 2025.

ESA, an intergovernmental conglomerate of 22 member states, will decide on the director’s plan in November this year, according to a report published in Ars Technica.

Continue reading “Europe is seriously considering a major investment in space-based solar power” »

Aug 16, 2022

Solar Integration: Distributed Energy Resources and Microgrids

Posted by in categories: business, robotics/AI, solar power, sustainability

Simply put, we need a reliable and secure energy grid. Two ways to ensure continuous electricity regardless of the weather or an unforeseen event are by using distributed energy resources (DER) and microgrids. DER produce and supply electricity on a small scale and are spread out over a wide area. Rooftop solar panels, backup batteries, and emergency diesel generators are examples of DER. While traditional generators are connected to the high-voltage transmission grid, DER are connected to the lower-voltage distribution grid, like residences and businesses are.

Microgrids are localized electric grids that can disconnect from the main grid to operate autonomously. Because they can operate while the main grid is down, microgrids can strengthen grid resilience, help mitigate grid disturbances, and function as a grid resource for faster system response and recovery.

Aug 16, 2022

Perovskite material with superlattice structure might surpass efficiency of a ‘perfect’ solar cell

Posted by in categories: solar power, sustainability

A perovskite solar cell developed by engineers at the University of California San Diego brings researchers closer to breaking the ceiling on solar cell efficiency, suggests a study published Aug. 10 in Nature.

The new solar cell is a lead-free low-dimensional perovskite material with a superlattice —a first in the field. What’s special about this material is that it exhibits efficient carrier dynamics in three dimensions, and its device orientation can be perpendicular to the electrodes. Materials in this particular class of perovskites have so far only exhibited such dynamics in two dimensions—a perpendicularly orientated solar cell has never been reported.

Thanks to its specific structure, this new type of superlattice solar cell reaches an efficiency of 12.36%, which is the highest reported for lead-free low-dimensional perovskite solar (the previous record holder’s efficiency is 8.82%). The new solar cell also has an unusual open-circuit voltage of 0.967 V, which is higher than the theoretical limit of 0.802 V. Both results have been independently certified.

Aug 15, 2022

Excitons need space to separate: Free carrier production in organic solar cells

Posted by in categories: solar power, sustainability

Solar cells based on organic molecules offer potential advantages over conventional devices for converting light into electricity. These organic solar cells could be inexpensive, durable, and easy to make. However, organic cells do not yet have the performance that matches conventional devices. Scientists’ efforts to improve performance have been limited by their limited understanding of how electrons excited by light (or “photoexcited”) become “free carriers.”

In principle, free carriers flow across a material and emerge as an electrical current. Prior scientific studies suggest that photoexcitation leads to a tightly bound pair consisting of an electron and a hole. These studies did not describe how to overcome the strong binding forces to form free carriers. This new study reveals that more sites on neighboring molecules can accept electrons, explaining how free carriers form directly.

Published in Materials Horizons, this research developed a new model called Distribution Range Electron Transfer (DRET). Previous models for the generation of free carriers in have generally invoked new physical phenomena to explain experimental results. In particular, they have said that free carriers can form with efficiency that approaches 100% in a material where opposite charges are traditionally difficult to separate and use.

Aug 9, 2022

Soap molecule could help make alternative LED tech commercially viable

Posted by in categories: robotics/AI, solar power, sustainability

Adding a molecule normally used in detergent to an infrared LED could make devices that are easier to manufacture, require less energy and display richer colours than existing ones.

Solar cells and LEDs made from perovskite, a titanium and calcium crystal, have long held promise as being more efficient and easier to produce than commonly used silicon-based devices, but making them both stable and efficient enough to rival silicon’s commercial success has proved difficult.

What gives humans the advantage over our incoming robot masters? Junaid Mubeen at New Scientist Live this October.

Aug 8, 2022

N-type solar cell with aluminum-titanium passivating contact achieves 21.9% efficiency

Posted by in categories: solar power, sustainability

Scientists in Australia have demonstrated a new way to apply a passivating contact layer to silicon cells. They produced an n-type cell with aluminum-titanium passivating contact and 21.9% efficiency, and claimed the technique could open up new possibilities for the use of transition metal oxides in cell passivation.

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