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Thu03052015

Technology

Penn State develops CPV system for rooftops

Researchers at Penn State have developed a concentrating photovoltaic system that is small enough and light enough to be mounted on a building’s roof. "Concentrating photovoltaic (CPV) systems leverage the cost of high efficiency multi-junction solar cells by using inexpensive optics to concentrate sunlight onto them," explained Noel C. Giebink, assistant professor of electrical engineering, Penn State. "Current CPV systems are the size of billboards and have to be pointed very accurately...

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New battery uses old batteries for greener energy storage

Energizer has developed the world’s first high-performance battery made with recycled batteries. The Energizer EcoAdvanced is a AA battery that is four percent made from recycled batteries. It is also Energizer’s highest performing alkaline battery, allowing users to power their devices with less impact on the planet. “Industry experts long believed it was impossible to create a battery made with recycled batteries while maintaining performance,” said Michelle Atkinson, chief marketing officer...

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Advantage of green cloud computing

Green computing is the usage of computing resources in an energy- and resource-efficient manner. Part of it is using computers that have been Energy Star certified, which are designed to reduce electricity usage and also reduce the amount of harmful emissions into the environment. Another part is the adoption of practices, which contribute to green computing, under which cloud computing falls. 1. Seamless expansion Cloud computing can be used to re-provision resources within a business, so that the business doesn’t have to buy any more infras...

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Bacteria producing sweet-smelling compound for greener fuels

A sweet-smelling chemical compound primarily used in fragrances and flavoring is being studied for its potential as a clean and green biofuel. Methyl ketones, used to provide scents to essential oils and flavoring in foods such as cheese, are naturally occurring compounds four in the aromatic evergreen plant known as rue. They have also been found in tomatoes and other plants, as well as in certain insects and microorganisms.Methyl ketones can also be used as a blending agent for cleaner and greener diesel fuel. The E.coli bacterium also creates methyl...

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New polymer materials developed for better solar cells

Researchers from North Carolina State University and the Hong Kong University of Science and Technology have developed new materials for more efficient polymer solar cells. The researchers found that temperature-controlled aggregation in a family of new semi-conducting polymers is the key to create flexible and lightweight organic solar cells that have a high solar efficiency and can be cheaply mass produced.NC State physicist Harald Ade and postdoctoral researcher Wei Ma had previously studied the morphology of polymer solar cells...

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New oxygen-removing catalyst developed for better biofuel production

Researchers from Washington State University have developed a new catalyst that can remove oxygen from plant-based materials for a more efficient biofuel process. The researchers mix inexpensive iron with a tiny amount of rare palladium to make their catalysts. The new catalyst addresses one of the challenges in biofuel production which is grabbing carbon for fuel while removing oxygen. Too much oxygen, which is naturally found in plant material...

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More ethanol-tolerant yeast for more biofuel production

Yeast is an important component in the ethanol production process; however, high concentrations of ethanol are toxic to yeast. In order to improve the ethanol production process, researchers from the Massachusetts Institute of Technology are working to boost yeast tolerance to ethanol. “Toxicity is probably the single most important problem in cost-effective biofuels production,” said George Stephanopoulos, the Willard Henry Dow Profes...

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Increasing oil in plant leaves for better biofuels

Solar power could overtake all other sources of electricity by 2050, according to two reports released by the International Energy Agency. Based on the two documents released by I.E.A., solar photovoltaic systems could generate up to 16 percent of the world’s electricity by 2050, while solar thermal electricity from concentrating solar power plants could provide an additional 11 percent to the energy mix. Combined these solar energy technolo...

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New solar absorber can harness solar radiation for heat and energy

Researchers at the Massachusetts Institute of Technology have developed a material that can absorb more of the sun’s wavelengths for better conversion of the suns energy to heat. The material is a two-dimensional metallic dielectric photonic crystal that can absorb sunlight from a wide range of angles and withstand extremely high temperatures. It is also cheap and easy to make in large scales. The material was developed to work as part...

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Using a magic ratio for better, stronger and greener concrete

A small modification to the contents of cement mix could lower the carbon emissions of the construction sector and result in stronger, more durable concrete. The world’s most commonly used construction material is concrete. Unfortunately, concrete is also a leading contributor to global warming, producing as much as one-tenth of the greenhousegas emissions generated by the construction sector. Concrete is made of a mixture of sand, gravel, water and cement....

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