Archive for the ‘energy’ category: Page 5

Apr 25, 2024

Revolutionizing Renewable Energy: Innovative Salt Battery Efficiently Harvests Osmotic Power

Posted by in categories: energy, sustainability

A new semipermeable membrane doubles the osmotic energy output in estuaries, showing potential for sustainable power generation.

Estuaries — where freshwater rivers meet the salty sea — are great locations for birdwatching and kayaking. In these areas, waters containing different salt concentrations mix and may be sources of sustainable, “blue” osmotic energy. In the journal ACS Energy Letters, researchers report creating a semipermeable membrane that harvests osmotic energy from salt gradients and converts it to electricity.

The new design had an output power density more than two times higher than commercial membranes in lab demonstrations.

Apr 24, 2024

E. coli engineered to become methanol addict to make industry feedstocks

Posted by in categories: chemistry, energy, food

Bacterium could head off food versus fuel dilemma by producing chemicals from agricultural waste.

Apr 23, 2024

The big quantum chill: Scientists modify common lab refrigerator to cool faster with less energy

Posted by in categories: energy, quantum physics

By modifying a refrigerator commonly used in both research and industry, researchers at the National Institute of Standards and Technology (NIST) have drastically reduced the time and energy required to cool materials to within a few degrees above absolute zero.

Apr 23, 2024

China unveils world’s 1st diesel engine with 53.09% thermal efficiency

Posted by in category: energy

Chinese firm Weichai Power unveils an advanced diesel engine that achieves a remarkable 53.09 percent intrinsic thermal efficiency.

Apr 23, 2024

MXenes-based energy storage devices could be charged in seconds

Posted by in categories: chemistry, energy, engineering

A team at Texas A&M University is taking significant steps for the development of a new generation of energy storage devices. They aim to develop a device that can combine the benefits of current technologies while addressing their limitations.

Dr. Abdoulaye Djire, a chemical engineering professor at Texas A&M University, as well as a few chemistry engineering graduates are focusing on MXenes, which is expected to be a compelling alternative to conventional lithium-ion batteries. Currently, the team is exploring the major advantages of nitride MXenes.

Apr 23, 2024

Manipulating the geometry of the ‘electron universe’ in magnets

Posted by in categories: energy, quantum physics

Researchers at Tohoku University and the Japan Atomic Energy Agency have developed fundamental experiments and theories to manipulate the geometry of the “electron universe,” which describes the structure of electronic quantum states in a manner mathematically similar to the actual universe, within a magnetic material under ambient conditions.

Apr 23, 2024

Why recycling metal is an opportunity too good to waste

Posted by in categories: energy, sustainability, transportation

Recycling energy-transition metals from battery, electric vehicles and renewable energy products offers abundant growth potential.

Apr 23, 2024

Some White Dwarfs Might be Older than Previously Thought

Posted by in categories: energy, physics, space

More than 97% of the stars in our Galaxy will end their lives with a whimper—slowly cooling as stellar remnants known as white dwarfs. The cooling of white dwarfs follows a pattern that was thought to be so predictable that the temperatures of white dwarfs are used to determine the age of surrounding stars. New findings, however, indicate this pattern may need revision [1]. Predictions made by Antoine Bédard of the University of Warwick, UK, and his colleagues now indicate that some white dwarfs may undergo a process that “reinvigorates” the stars, significantly slowing down the cooling process. That change could alter the calculated ages of white dwarfs by billions of years.

When a small star (one with a mass 8 times or less that of the Sun) runs out of nuclear fuel, it sheds its outer layers to form a planetary nebula. The core of the star then collapses into a white dwarf. Producing no heat, white dwarfs spend their existences radiating their remaining energy into space, cooling and solidifying from the inside out. Or so astrophysicists thought.

In 2019, this model was disrupted by astronomers analyzing data from the European Space Agency’s Gaia mission. The researchers identified a previously unknown population of white dwarfs within the Milky Way with anomalous properties [2]. As stars age, their velocities increase with respect to nearby stars because of repeated gravitational interactions with those stars. The newly identified white dwarfs, dubbed the Q branch, have much higher average velocities than models indicate they should have based on their temperatures, a finding that suggests that the Q-branch white dwarfs are older than previously thought. Some process is slowing down the cooling.

Apr 22, 2024

‘Nano stitches’ enable lighter and tougher composite materials

Posted by in categories: energy, transportation

To save on fuel and reduce aircraft emissions, engineers are looking to build lighter, stronger airplanes out of advanced composites. These engineered materials are made from high-performance fibers that are embedded in polymer sheets. The sheets can be stacked and pressed into one multilayered material and made into extremely lightweight and durable structures.

Apr 21, 2024

Silent flight edges closer to reality, new research suggests

Posted by in categories: energy, transportation

Researchers at the University of Bristol have uncovered the secrets behind the quiet operation of futuristic aircraft equipped with innovative embedded engines.

The study sheds light on the noise generation and transmission mechanisms of boundary layer ingesting (BLI) ducted fans. These engines draw in air from both the front and the surface of the aircraft’s body and operate with high efficiency, reducing fuel consumption compared to traditional engines.

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