Category Technology/Electronics

A New Heat Engine with No Moving Parts is as Efficient as a Steam Turbine

Engineers at MIT and the National Renewable Energy Laboratory (NREL) have designed a heat engine with no moving parts. Their new demonstrations show that it converts heat to electricity with over 40 percent efficiency — a performance better than that of traditional steam turbines.

The heat engine is a thermophotovoltaic (TPV) cell, similar to a solar panel’s photovoltaic cells, that passively captures high-energy photons from a white-hot heat source and converts them into electricity. The team’s design can generate electricity from a heat source of between 1,900 to 2,400 degrees Celsius, or up to about 4,300 degrees Fahrenheit.

The researchers plan to incorporate the TPV cell into a grid-scale thermal battery...

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Engineered Crystals could help Computers Run on Less Power

University of California, Berkeley, engineers have created engineered crystal structures that display an unusual physical phenomenon known as negative capacitance. Incorporating this material into advanced silicon transistors could make computers more energy efficient. Credit: Ella Maru Studio, University of California – Berkeley

Computers may be growing smaller and more powerful, but they require a great deal of energy to operate. The total amount of energy the U.S. dedicates to computing has risen dramatically over the last decade and is quickly approaching that of other major sectors, like transportation.

In a study published online this week the journal Nature, University of California, Berkeley, engineers describe a major breakthrough in the design of a component of transistors...

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New technique uses the Body’s Naturally Occurring Ions to help Transmit Data Wirelessly

Ionic communication: (Top left) Cross-sectional schematic illustration of an ionic communication device consisting of an implanted transmitter electrode pair inside biological tissue and a receiver electrode pair on the surface of the tissue. (Top right) Frequency responses of ionic communication highlighting is capacity to operate at megarhertz frequencies. A 10-link ionic communication transmitter (TX) and receiver (RX) array conforming to the surface of an orchid petal. Credit: Dion Khodagholy/Columbia Engineering

Implantable bioelectronics are now often key in assisting or monitoring the heart, brain, and other vital organs, but they often lack a safe, reliable way of transmitting their data to doctors...

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In Race to Build Quantum Computing Hardware, Silicon begins to Shine

Silicon-based device in development for use in quantum computers. Gate electrodes shown in blue, red, and green are used to define the quantum dot potentials while the micromagnet on top provides a magnetic field gradient. The image was taken using scanning electron microscopy and the colors were applied for clarity. Credit: Adam Mills, Princeton University

Research conducted by Princeton University physicists is paving the way for the use of silicon-based technologies in quantum computing, especially as quantum bits—the basic units of quantum computers. This research promises to accelerate the use of silicon technology as a viable alternative to other quantum computing technologies, such as superconductors or trapped ions.

In research published in the journal Science Advances, Pr...

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