admin – Page 343 – Alternative Energies

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efficiency
December 25, 2015
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Invisibility cloak might enhance efficiency of solar cells

Success of the energy turnaround will depend decisively on the extended use of renewable energy sources. However, their efficiency partly is much smaller than that of conventional energy sources. The efficiency of commercially available photovoltaic cells, for instance, is about 20 percent. Scientists of Karlsruhe Institute of Technology have now published an unconventional approach to increasing the efficiency of the panels. Optical invisibility cloaks guide sunlight around objects that cast shadows on the solar panel.

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berlin
christian
December 25, 2015
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Numerous bats killed by German wind turbines: Migratory bats at risk

Numerous bats are killed by German wind turbines. The number of such turbines, already very high, is planned to be increased further. More than two-thirds of bats being killed by wind turbines on German ground are migrants on their way between summer and winter habitats. Due to its geographical location in Europe, Germany has consequently a central responsibility for the conservation of migratory bats.

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December 25, 2015
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Installing Solar Panels – Best Decision Ever Made

The world is facing two major problems that affect us all. Firstly, there is the climate change that is a result of human actions, in first place fossil fuel burning…

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December 25, 2015
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Offshore wind farms: Measuring buoy reduces costs

Building and operating offshore wind farms is an expensive business. To be able to estimate the profitability of the plants, first the wind potential must be determined. Researchers have now created a wind measurement buoy with sophisticated, precise measurement technology that supplies the necessary data.

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brown-university
established
December 25, 2015
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Efficiency from larger perovskite solar cells improved

Perovskite solar cells are cheaper to make than traditional silicon cells and their electricity conversion efficiency is improving rapidly. To be commercially viable, perovskite cells need to scale up from lab size. Researchers report a method for making perovskite cells larger while maintaining efficiency.

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hydropower
December 25, 2015
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Turkey to Commission US$3.44 Billion in Hydroelectric and Dam Facilities

Turkey said it will commission 101 new hydroelectric plants and dams worth US$3.44 billion in January, according to information published by Anadolu Agency, Turkey’s state-run news agency.

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american
chemistry
December 25, 2015
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Discovery about new battery overturns decades of false assumptions

New findings have overturned a scientific dogma that stood for decades, by showing that potassium can work with graphite in a potassium-ion battery — a discovery that could pose a challenge and more sustainable, less costly alternative to the widely used lithium-ion battery.