Energy & Green Tech

The paints that eat pollutants and heat homes

Applying a coat of paint on the walls of a house may soon help to heat it, saving energy and reducing CO2 emissions. It could also clean the air that we breathe, breaking down chemicals and pollutants, and eliminating harmful ...

Energy & Green Tech

Austria fails to win over neighbours for nuclear phase-out

Austrian Chancellor Sebastian Kurz, on his first trip abroad Thursday since being re-elected, failed to persuade the governments of four central European countries to give up on nuclear energy which they largely depend on.

Energy & Green Tech

A communal energy hub

The amount of energy produced by renewable sources ebbs and flows. The Fraunhofer Institute for Industrial Mathematics ITWM has found a smart work-around for these fluctuations. Its scientists developed an innovative energy ...

Energy & Green Tech

Declining renewable costs drive focus on energy storage

An oft-repeated refrain—the sun doesn't always shine, and the wind doesn't always blow—is sometimes seen as an impediment to renewable energy. But it's also an impetus toward discovering the best ways to store that energy ...

Energy & Green Tech

Trump administration says it will approve largest solar farm in US

Federal officials plan to approve a massive solar farm with energy storage in the desert outside Las Vegas, paving the way for a $1-billion project that will provide electricity to Nevada residents served by billionaire Warren ...

Energy & Green Tech

Developing a digital twin for the electricity grid

The rapid transition to renewable energy threatens to cause major problems to the very expensive electricity grid in the Netherlands. In his quest for solutions, Professor Peter Palensky is now working on a "digital twin" ...

Energy & Green Tech

Used electric vehicle batteries charge up the grid

Researchers at Oak Ridge National Laboratory have developed an innovative control system for repurposed electric vehicle battery packs to store electricity for home use and are scaling up the technology to a large, power ...

Energy & Green Tech

Suitable energy mix for smaller communities

Solar thermal, geothermal, photovoltaic—what form of energy supply is most suitable for a particular municipality? Representatives of smaller communities are overwhelmed by a huge amount of information, which tends to exacerbate ...

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Renewable energy

Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides, and geothermal heat—which are renewable (naturally replenished). In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% of global energy consumption and 15% of global electricity generation.

Wind power is growing at the rate of 30 percent annually, with a worldwide installed capacity of 121,000 megawatts (MW) in 2008, and is widely used in European countries and the United States. The annual manufacturing output of the photovoltaics industry reached 6,900 MW in 2008, and photovoltaic (PV) power stations are popular in Germany and Spain. Solar thermal power stations operate in the USA and Spain, and the largest of these is the 354 MW SEGS power plant in the Mojave Desert. The world's largest geothermal power installation is The Geysers in California, with a rated capacity of 750 MW. Brazil has one of the largest renewable energy programs in the world, involving production of ethanol fuel from sugar cane, and ethanol now provides 18 percent of the country's automotive fuel. Ethanol fuel is also widely available in the USA. While most renewable energy projects and production is large-scale, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development. Kenya has the world's highest household solar ownership rate with roughly 30,000 small (20–100 watt) solar power systems sold per year.

Some renewable energy technologies are criticised for being intermittent or unsightly, yet the renewable energy market continues to grow. Climate change concerns coupled with high oil prices, peak oil and increasing government support are driving increasing renewable energy legislation, incentives and commercialization. New government spending, regulation, and policies should help the industry weather the 2009 economic crisis better than many other sectors.

This text uses material from Wikipedia, licensed under CC BY-SA