There are a lot of traditional uses of wind power, hydropower, biofuel, and solar energy in developed and developing countries. But the mass production of electricity using renewable energy sources is now becoming more common.
Growth of renewables[change | change source]
From the end of 2004, worldwide renewable energy capacity grew at rates of 10–60% annually for many technologies. For wind power and many other renewable technologies, growth sped up in 2009 relative to the previous four years. More wind power was added during 2009 than any other renewable technology. However, grid-connected PV increased the fastest of all renewables technologies, with a 60% annual average growth rate.
|Selected renewable energy global indicators||2008||2009||2010||2011||2012||2013|
|Investment in new renewable capacity (annual) (109 USD)||130||160||211||257||244||214|
|Renewables power capacity (existing) (GWe)||1,140||1,230||1,320||1,360||1,470||1,560|
|Hydropower capacity (existing) (GWe)||885||915||945||970||990||1,000|
|Wind power capacity (existing) (GWe)||121||159||198||238||283||318|
|Solar PV capacity (grid-connected) (GWe)||16||23||40||70||100||139|
|Solar hot water capacity (existing) (GWth)||130||160||185||232||255||326|
|Ethanol production (annual) (109 litres)||67||76||86||86||83||87|
|Biodiesel production (annual) (109 litres)||12||17.8||18.5||21.4||22.5||26|
|Countries with policy targets
for renewable energy use
Wind power market grows[change | change source]
Wind power capacity has expanded quickly to 336 GW in June 2014, and wind energy production was about 4% of total worldwide electricity usage, and growing fast. Wind power is widely used in European countries, and more the largest wind farms in the world, as of January 2010:
|Gansu Wind Farm||6,000||China|||
|Alta (Oak Creek-Mojave)||1,320||United States|||
|Jaisalmer Wind Park||1,064||India|||
|Shepherds Flat Wind Farm||845||United States|||
|Roscoe Wind Farm||782||United States|||
|Horse Hollow Wind Energy Center||736||United States|||
|Capricorn Ridge Wind Farm||662||United States|||
|Fântânele-Cogealac Wind Farm||600||Romania|||
|Fowler Ridge Wind Farm||600||United States|||
|Whitelee Wind Farm||539||United Kingdom|||
A wind farm is a group of wind turbines in the same location used for production of electricity. A large wind farm may consist of several hundred individual wind turbines distributed over an extended area, but the land between the turbines may be used for agricultural or other purposes. A wind farm may also be located offshore.
World's largest PV power plants[change | change source]
Solar photovoltaic cells convert sunlight into electricity and many solar photovoltaic power stations have been built, mainly in Europe. As of December 2010, the largest photovoltaic (PV) power plants in the world are the Sarnia Photovoltaic Power Plant (Canada, 97 MW), Montalto di Castro Photovoltaic Power Station (Italy, 84.2 MW), Finsterwalde Solar Park (Germany, 80.7 MW), Rovigo Photovoltaic Power Plant (Italy, 70 MW), Olmedilla Photovoltaic Park (Spain, 60 MW), the Strasskirchen Solar Park (Germany, 54 MW), and the Lieberose Photovoltaic Park (Germany, 53 MW). Larger power stations are under construction, some proposed will have a capacity of 150 MW or more.
Many of these plants are integrated with agriculture and some use innovative tracking systems that follow the sun's daily path across the sky to generate more electricity than conventional fixed-mounted systems. There are no fuel costs or emissions during operation of the power stations.
New generation of solar thermal plants[change | change source]
Large solar thermal power stations include the 354 megawatt (MW) Solar Energy Generating Systems power installation in the USA, Solnova Solar Power Station (Spain, 150 MW), Andasol solar power station (Spain, 100 MW), Nevada Solar One (USA, 64 MW), PS20 solar power tower (Spain, 20 MW), and the PS10 solar power tower (Spain, 11 MW). The 370 MW Ivanpah Solar Power Facility, located in California's Mojave Desert, is the world’s largest solar thermal power plant project currently under construction.
The solar thermal power industry is growing fast with 1.2 GW under construction as of April 2009 and another 13.9 GW announced globally through 2014. Spain is the epicenter of solar thermal power development with 22 projects for 1,037 MW under construction, all of which are projected to come online by the end of 2010. In the United States, 5,600 MW of solar thermal power projects have been announced. In developing countries, three World Bank projects for integrated solar thermal/combined-cycle gas-turbine power plants in Egypt, Mexico, and Morocco have been approved.
Variable renewable energy[change | change source]
Variable renewable energy is a renewable energy source that is non-dispatchable due to its fluctuating nature, like wind power and solar power, as opposed to a controllable renewable energy source such as hydroelectricity, or biomass, or a relatively constant source such as geothermal power or run-of-the-river hydroelectricity. Critics of wind and solar power warn of their variable output, but many studies have shown that the grid can cope, and it is doing so in Denmark and Spain.
The International Energy Agency says that there has been too much focus on issue of the variability. Its significance depends on a range of factors which include the market penetration of the renewables concerned, the balance of plant, and the wider connectivity of the system, as well as demand side flexibility. Variability will rarely be a barrier to increased renewable energy deployment. But at high levels of market penetration it requires careful analysis and management.
Ethanol for transportation[change | change source]
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. As a result, Brazil, which years ago had to import a large share of the petroleum needed for domestic consumption, recently reached complete self-sufficiency in oil.
Most cars on the road today in the U.S. can run on blends of up to 10% ethanol, and motor vehicle manufacturers already produce vehicles designed to run on much higher ethanol blends. Ford, DaimlerChrysler, and General Motors Corporation are among the automobile companies that sell “flexible-fuel” cars, trucks, and minivans that can use gasoline and ethanol blends ranging from pure gasoline up to 85% ethanol (E85). By mid-2006, there were approximately six million E85-compatible vehicles on U.S. roads.
Related pages[change | change source]
Notes[change | change source]
|Wikimedia Commons has media related to Renewable energy.|
|Wikinews has news related to this article: Oil prices drive new investment in clean technology|
- Resources that for all practical purposes cannot be exhausted): United States Department of Energy Glossary of energy-related terms (URL accessed Dec 21, 2006)
- REN21 (2012). Renewables Global Status Report 2012 p. 17.
- "REN21 2013 Renewables Global Status Report" (PDF). Retrieved 2014-01-30.
- Jacobson, Mark Z.; Delucchi, M.A. (November 2009). "A Path to Sustainable Energy by 2030" (PDF). Scientific American 301 (5): 58–65. doi:10.1038/scientificamerican1109-58. PMID 19873905. http://www.stanford.edu/group/efmh/jacobson/Articles/I/sad1109Jaco5p.indd.pdf.
- The World Wind Energy Association (2014). 2014 Half-year Report. WWEA. pp. 1–8.
- GWEC, Global Wind Report Annual Market Update
- Watts, Jonathan & Huang, Cecily. Winds Of Change Blow Through China As Spending On Renewable Energy Soars, The Guardian, March 19, 2012, revised on March 20, 2012. Retrieved January 4, 2012.
- Xinhua: Jiuquan Wind Power Base Completes First Stage, Xinhua News Agency, November 4, 2010. Retrieved from ChinaDaily.com.cn website January 3, 2013.
- Terra-Gen Press Release, 17 April 2012
- Started in August 2001, the Jaisalmer based facility crossed 1,000 MW capacity to achieve this milestone
- Mills, Erin (July 12, 2009). "Shepherds Flat farm lifts off". East Oregonian. Retrieved 11 December 2009.[dead link]
- E.ON Delivers 335-MW of Wind in Texas
- Drilling Down: What Projects Made 2008 Such a Banner Year for Wind Power?
- AWEA: U.S. Wind Energy Projects – Texas[dead link]
- CEZ Group: The Largest Wind Farm in Europe Goes Into Trial Operation
- "Renewable Energy Impact on Environment".
- Whitelee Windfarm
- Denis Lenardic. Large-scale photovoltaic power plants ranking 1 - 50 PVresources.com, 2010.
- Mark Z. Jacobson (2009). Review of Solutions to Global Warming, Air Pollution, and Energy Security p. 4.
- Edwin Cartlidge (18 November 2011). "Saving for a rainy day". Science (Vol 334). pp. 922–924.
- Todd Woody. In California’s Mojave Desert, Solar-Thermal Projects Take Off Yale Environment 360, 27 October 2010.
- Global Concentrated Solar Power Industry to Reach 25 GW by 2020
- Solar Thermal Projects Under Review or Announced
- REN21 (2008). Renewables 2007 Global Status Report (PDF) p. 12.
- Amory Lovins (2011). Reinventing Fire, Chelsea Green Publishing, p. 199.
- Contribution of Renewables to Energy Security
- America and Brazil Intersect on Ethanol
- American energy: The renewable path to energy security
Other websites[change | change source]
|Wikinews has news related to this article: EU adopts renewable energy measures|