Energy & Green Tech

Form Energy announces Iron-Air 100-hour storage battery

Officials with battery maker Form Energy have announced the development of the Iron-Air 100-hour storage battery—a battery meant to store electricity created from renewable sources such as solar and wind. As part of their ...

Energy & Green Tech

Plans for largest US solar field north of Vegas scrapped

The push to transition from carbon-emitting fuel sources to renewable energy is hitting a roadblock in Nevada, where solar power developers are abandoning plans to build what would have been the United States' largest array ...

Energy & Green Tech

Japan ups 2030 renewables goal in draft energy policy

Japan aims to hike its 2030 renewable energy target as part of efforts to slash emissions, according to draft documents released Wednesday, but activists described the planned goal as "disappointing".

Energy & Green Tech

Green hydrogen production from curtailed wind and solar power

Designing future low-carbon energy systems to use power generated in excess of the grid's demands to produce hydrogen fuel could substantially lower electricity costs, according to new work published by Advances in Applied ...

Engineering

Expanding wind energy while preserving scenery

Wind energy is of outstanding importance to the energy transition in Germany. According to the Federal Statistical Office, its share in total gross electricity production of about 24% is far higher than those of all other ...

Energy & Green Tech

Renewable energy OK, but not too close to home

When it comes to transitioning from carbon-based to renewable source energy systems, Americans are on board. They're less keen, however, having these new energy infrastructures—wind turbines or solar farms—built close ...

page 1 from 31

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