Renewable Grid: Recovering Electricity from Heat Storage hits 44% Efficiency

Renewable grid: Recovering electricity from heat storage hits 44% efficiency
To measure the power produced by his photovoltaic cells, Roy-Layinde holds a heat source held over the photovoltaic cell, which emits the infrared radiation that the cell converts into electricity. Wires connected to the photovoltaic cell run the electricity to a sensor that reads the voltage and amperage. Image credit: Brenda Ahearn, Michigan Engineering

Closing in on the theoretical maximum efficiency, devices for turning heat into electricity are edging closer to being practical for use on the grid, according to University of Michigan research.

Heat batteries could store intermittent renewable energy during peak production hours, relying on a thermal version of solar cells to convert it into electricity later.

“As we include higher fractions of renewables on the grid to reach ...

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Using Wobbling Stellar Material, astronomers measure the Spin of a Supermassive Black Hole for the first time

This schematic figure depicts the precession of an accretion disk formed from the debris of a disrupted star around a supermassive black hole (SMBH).

Astronomers at MIT, NASA, and elsewhere have a new way to measure how fast a black hole spins, by using the wobbly aftermath from its stellar feasting.

The method takes advantage of a black hole tidal disruption event—a blazingly bright moment when a black hole exerts tides on a passing star and rips it to shreds. As the star is disrupted by the black hole’s immense tidal forces, half of the star is blown away, while the other half is flung around the black hole, generating an intensely hot accretion disk of rotating stellar material.

The MIT-led team has shown that the wobble of the newly created accretion disk is key to working ...

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Study Offers New Detail on how COVID-19 Affects the Lungs

An illustration of ferroptosis in the lungs of a COVID-19 patient.
In some severe cases of COVID-19, the lungs undergo extreme damage, resulting in a range of life-threatening conditions like pneumonia, inflammation, and acute respiratory distress syndrome. The root cause of those wide-ranging reactions in the lungs has until now remained unclear.

New research shows that ferroptosis, a form of cell death, occurs in severe COVID-19 patient lungs. Stopping it improves outcomes. In some severe cases of COVID-19, the lungs undergo extreme damage, resulting in a range of life-threatening conditions like pneumonia, inflammation, and acute respiratory distress syndrome. The root cause of those wide-ranging reactions in the lungs has until now remained unclear.

A new study by researchers at Columbia and the Columbia University Irving Medical Center sheds l...

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‘Fossilizing’ Cracks in Infrastructure creates Sealing that can even Survive Earthquakes

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Flow-path fractures in rock sealed by calcite, promoted by the researchers’ ‘concretion-forming resin’. (credit: Hidekazu Yoshida)

In a new study, a team of researchers used research on fossilizing techniques to create a new method for sealing cracks and fractures in rocks and bedrock using a ‘concretion-forming resin’. This innovative technique has applications in a wide range of industries, from tunnel construction to long-term underground storage of hazardous materials.

Various forms of underground activity, such as deep wells or the disposal of hazardous materials, require the long-term sealing of rocks. A team of researchers has developed an innovative method based on fossilization processes to seal cracks and fractures in rock using a “concretion-forming resin...

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