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Archive for the ‘energy’ category: Page 12

Feb 17, 2023

System provides cooling with no electricity

Posted by in categories: energy, space

The new system is described today in a paper in the journal Science Advances, by MIT graduate student Arny Leroy, professor of mechanical engineering and department head Evelyn Wang, and seven others at MIT and at the Pontifical Catholic University of Chile.

Such a system could be used, for example, as a way to keep vegetables and fruit from spoiling, potentially doubling the time the produce could remain fresh, in remote places where reliable power for refrigeration is not available, Leroy explains.

2022 story:

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Feb 16, 2023

We’ve Just Seen an ‘Exceptional’ Once-in-a-Millennium Space Explosion

Posted by in categories: energy, space

A record-breaking gamma-ray burst detected in October 2022 has now been described as a one-in-a-thousand years event.

It’s called GRB 221009A, and with up to 18 teraelectronvolts of energy packed in its emissions of light, it’s considered the most powerful gamma-ray burst on record.

We’ve been waiting to learn more about this incredible explosion, and now the analyses have started to arrive on preprint server arXiv, with a trio of papers submitted to The Astrophysical Journal Letters.

Feb 15, 2023

US startup introduces DC-to-DC solar EV charger

Posted by in category: energy

With most EV chargers, which are AC-to-DC, there is lost energy and a longer charging time. But with DC to DC, according to Enteligent, the DC-to-DC charging results in up to 25% energy savings because the power does not have to be converted.


From pv magazine USA

Enteligent unveiled its DC-to-DC-solar hybrid bi-directional EV charger this week at Intersolar North America. Powered by the sun, the EV charger can supply 25 kW of fast DC charging, charging three times faster than AC Level 2 EV chargers, the company reports.

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Feb 15, 2023

A new method converts seawater straight into green hydrogen

Posted by in categories: energy, sustainability

RMIT

The 2021 IPCC report, however, urged scientists and engineers to double down on renewable energy efforts and consider all options.

Feb 13, 2023

Electric buses are driving a silent revolution in Nairobi

Posted by in categories: biotech/medical, energy, policy, sustainability, transportation

Electric buses could help solve the problem. Today Bhattacharya is the CEO and co-founder of BasiGo, a mobility startup racing to electrify the city’s buses. The company is not alone. Swedish-Kenyan electric vehicle manufacturer Roam also has its eyes set on Nairobi’s mass transport sector. Both are rolling out fleets of buses this year that could mark the start of a new chapter for city’s famous matatu culture.


During the early days of the coronavirus pandemic in Nairobi, Kenya, something improbable happened: a mountain appeared. To curb the transmission of the virus, authorities called on the city’s thousands of private bus operators to cease trading. “Within three days, the air completely cleared,” recalls entrepreneur Jit Bhattacharya. “You could see Mount Kenya … crystal clear,” some 90 miles away.

Bhattacharya also saw an opportunity. Kenya produces 90% of its electricity from renewable sources – mostly geothermal and hydropower – and has surplus grid capacity, yet it imports nearly all its petroleum fuels. What if clean energy could be channeled into the transport sector? Maybe it could help the city clean up its act. Maybe Mount Kenya could become a permanent feature for Nairobi once more.

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Feb 13, 2023

Researchers may have just future-proofed turbines in the aerospace and energy industry

Posted by in categories: 3D printing, energy

Researchers have come up with a new way to use 3D printing to make a new superalloy.

A group of researchers has developed a new superalloy resistant to high temperatures. This could if ever brought into production, prove revolutionary for the future of turbines.

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Feb 12, 2023

News on the Energy Front — Exxon Continues to Disappoint, An Agrivoltaic Breakthrough, and a New Energy Storage Project

Posted by in categories: energy, food, sustainability

Exxon’s green energy stories on the website are gaslighting, REM Tec creates agrivoltaics for farms and Canada builds a mass storage site.

Feb 12, 2023

What energy source sparked the evolution of life?

Posted by in categories: chemistry, energy

Leading theories suggest that the first energy used by life was either from the sun or from geothermal heat and chemistry at the bottom of the ocean.

Feb 11, 2023

New Lithium Metal Battery Lets Drones Fly 70 Percent Longer

Posted by in categories: drones, energy, nanotechnology, sustainability

Nanoscale defects and mechanical stress cause the failure of solid electrolytes.

A group of researchers has claimed to have found the cause of the recurring short-circuiting issues of lithium metal batteries with solid electrolytes. The team, which consists of members from Stanford University and SLAC National Accelerator Laboratory, aims to further the battery technology, which is lightweight, inflammable, energy-dense, and offers quick-charge capabilities. Such a long-lasting solution can help to overcome the barriers when it comes to the adoption of electric vehicles around the world.

A study published on January 30 in the journal Nature Energy details different experiments on how nanoscale defects and mechanical stress cause solid electrolytes to fail.

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Feb 11, 2023

NASA Might Finally Solve the Million-Degree Mystery of the Sun’s Corona

Posted by in category: energy

This vibrant new image of the Sun is a treasure trove of science.


NASA and JAXA caught high-energy activity on the Sun. The result is a colorful new image.

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