News

Hitting the Theoretical Roof of Converting Waste Heat to Electricity

The need to get rid of excess heat creates a major source of inefficiency in everything from computer processor chips to car engines. According to Peter Hagelstein, an associate professor of Electrical Engineering at MIT, existing solid-state devices to convert heat into electricity are not very efficient. Experimenting with thermal diodes, an MIT team has come closer to the theoretical limitations for the efficiency of such a conversion.

Posted in: Energy Efficiency, Thermoelectrics, Energy, Transportation, News, GDM

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Microscopic Bubbles Clean Oil from Polluted Water

Small amounts of oil leave a fluorescent sheen on polluted water. Oil sheen is hard to remove, even when the water is aerated with ozone or filtered through sand. A University of Utah engineer has developed an inexpensive method to remove oil sheen by repeatedly pressurizing and depressurizing ozone gas - creating tiny bubbles that attack the oil so it can be removed by sand filters.

Posted in: Pollution, Remediation Technologies, Green Design & Manufacturing, News, GDM

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Algae as a High-Temperature Hydrogen Source

A team of researchers from the University of Tennessee, Knoxville and Oak Ridge National Laboratory have found that the inner machinery of photosynthesis can be isolated from certain algae and, when coupled with a platinum catalyst, is able to produce a steady supply of hydrogen when exposed to light.

Posted in: Alternative Fuels, Green Design & Manufacturing, Biomass, Energy Storage, Solar Power, Energy Efficiency, Renewable Energy, Energy, News, GDM

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Japan Wins Australia's Global Green Challenge

The "Tokai Challenger" solar car from Japan's Tokai University won the 3,000 kilometer Global Green Challenge race down the center of Australia. The Tokai Challenger maintained an average speed of over 100 kilometers per hour, or about 62 miles per hour, besting the winner of the previous four races - the Dutch Nuon Solar Team.

Posted in: Batteries, Electronics & Computers, Alternative Fuels, Green Design & Manufacturing, Solar Power, Renewable Energy, Energy, Transportation, News, GDM

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Three-Dimensional, Hidden Solar Cell

Using zinc oxide nanostructures grown on optical fibers and coated with dye-sensitized solar cell materials, researchers at the Georgia Institute of Technology have developed a new type of three-dimensional photovoltaic system. The approach could allow PV systems to be hidden from view and located away from traditional locations such as rooftops.

Posted in: Energy Storage, Solar Power, Energy Efficiency, Renewable Energy, Energy, News, GDM

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EPA's National TV Recycling Challenge

Electronic Manufacturers Recycling Management Company (MRM) is the winner of EPA's National TV Recycling Challenge. MRM developed a TV collection network that uses a variety of collection approaches, including establishing collection points with charities and self-storage units, to recycle approximately 3 million pounds of TVs.

Posted in: Green Design & Manufacturing, Recycling Technologies, News, GDM

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Transparent Insulating Film Could Enable Energy-Efficient Displays

Johns Hopkins materials scientists have found a new use for a chemical compound traditionally viewed as an electrical conductor (a substance that allows electricity to flow through it). By orienting the compound differently, the researchers have turned it into a thin film insulator, which blocks the flow of electricity but can induce large electric currents elsewhere.

Posted in: Batteries, Electronics & Computers, Energy Efficiency, Energy, News, GDM

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