Energy & Green Tech

Device generates light from the cold night sky

An inexpensive thermoelectric device harnesses the cold of space without active heat input, generating electricity that powers an LED at night, researchers report September 12 in the journal Joule.

Engineering

An implantable device that produces energy using ultrasound

A team of researchers affiliated with several institutions in the Republic of Korea has developed a type of implantable device that produces energy using an external ultrasound source. In their paper published in the journal ...

Energy & Green Tech

Pioneering 3-D printed device sets new record for efficiency

A new 3-D printed thermoelectric device, which converts heat into electric power with an efficiency factor over 50% higher than the previous best for printed materials—and is cheap to produce in bulk—has been manufactured ...

Energy & Green Tech

U.S. energy use rises to highest level ever

Americans used more energy in 2018 than in any other year, according to the most recent energy flow charts released by Lawrence Livermore National Laboratory (LLNL). Overall total energy consumption rose to 101.2 quadrillion ...

Energy & Green Tech

Massive wind harvesting project to go up in Iowa

(Tech Xplore)—MidAmerican Energy has announced that the State of Iowa's Utility Board has approved plans for installation of its 2 GW Wind XI project, the largest ever undertaken in the U.S.. The project will involve installing ...

Energy & Green Tech

Human energy to bring power by the pedal

Manoj Bhargava, founder of Billions in Change, calls up two words as the stars of his show. Energy, water. He reminds us what may be obvious but often ignored. They hold the key to other things that keep the poor, well, poor. ...

Energy & Green Tech

Wind power from the sky

Anyone who has ever steered a child's kite knows the feeling: The wind grips the kite and pulls the string. The string is quickly tensioned, the spindle rotates between the fingers and is difficult to control. The question ...

Energy & Green Tech

German power giant RWE aims for zero carbon by 2040

German energy giant RWE said Monday it aims to achieve carbon neutrality by 2040, winding up fossil-fuel activities while building up renewable generation, after taking over parts of competitor EON.

Energy & Green Tech

Photovoltaics could cool our homes with the power of the sun

The International Energy Agency has dubbed increased global cooling demand as one of the most critical blind spots in today's energy debate. A new study titled "Meeting Increased Global Cooling Demand with Photovoltaics during ...

Energy & Green Tech

Shining a light on electricity reliability in Sub-Saharan Africa

More than one billion people do not have access to electricity, and gaining access is a critical part of improving economic and human health outcomes in developing countries, where electrification rates can be as less ...

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