Portal:Energy

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Introduction

A plasma globe, using electrical energy to create plasma, light, heat, movement and a faint sound

Energy (from Ancient Greek ἐνέργεια (enérgeia) 'activity') is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

Forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiation, the internal energy contained within a thermodynamic system, and rest energy associated with an object's rest mass. These are not mutually exclusive.

All living organisms constantly take in and release energy. The Earth's climate and ecosystems processes are driven primarily by radiant energy from the sun. The energy industry provides the energy required for human civilization to function, which it obtains from energy resources such as fossil fuels, nuclear fuel, and renewable energy. (Full article...)

Selected article

Efficient energy use, sometimes simply called energy efficiency, is the goal to reduce the amount of energy required to provide products and services. For example, insulating a home allows a building to use less heating and cooling energy to achieve and maintain a comfortable temperature. Installing fluorescent lights or natural skylights reduces the amount of energy required to attain the same level of illumination compared with using traditional incandescent light bulbs. Compact fluorescent lights use one-third the energy of incandescent lights and may last 6 to 10 times longer. Improvements in energy efficiency are generally achieved by adopting a more efficient technology or production processes or by application of commonly accepted methods to reduce energy losses.

There are many motivations to improve energy efficiency. Reducing energy use reduces energy costs and may result in a financial cost saving to consumers if the energy savings offset any additional costs of implementing an energy efficient technology. Reducing energy use is also seen as a solution to the problem of reducing carbon dioxide emissions. According to the International Energy Agency, improved energy efficiency in buildings, industrial processes and transportation could reduce the world's energy needs in 2050 by one third, and help control global emissions of greenhouse gases.

Energy efficiency and renewable energy are said to be the twin pillars of sustainable energy policy and are high priorities in the sustainable energy hierarchy. In many countries energy efficiency is also seen to have a national security benefit because it can be used to reduce the level of energy imports from foreign countries and may slow down the rate at which domestic energy resources are depleted.

Selected image

Photo credit: United States Department of Energy
The fireball created as energy is released in a nuclear explosion.

Did you know?

A compact fluorescent lamp

• Buildings constructed to the German Passivhaus standard use 75% to 95% less energy for space heating and cooling than current new buildings in the United States?

• Estonia generates more than 90% of its electrical power from oil shale?

• Crossing 4,000 km (2,500 miles), the Druzhba pipeline is the world's longest oil pipeline?

• Coal is ground to a powder before being burnt in fossil fuel power plants?

• Compact fluorescent lamps (pictured) use about 1/4 of the energy of normal incandescent light bulbs, and pay for themselves after about 500 hours of use?

• Nuclear power in France produces 78% of all the country's electricity - more than in any other nation?

• Positive lightning bolts are typically six to ten times more powerful than normal lightning — and aircraft are not designed to withstand them?

• Dark energy is a hypothetical form of energy which permeates all of space?

Selected biography

Roman Arkadyevich Abramovich (born 24 October 1966 in Saratov, Russia) is a Jewish Russian oil billionaire and one of the Russian oligarchs.

Between 1992 and 1995, after Soviet president Mikhail Gorbachev's 'perestroika' economic reforms permitted the opening of small private businesses, Abramovich founded five companies that eventually evolved to specialize in the trading of oil and oil products. With the approved by Boris Yeltsin, in 1995 Roman Abramovich and partner Boris Berezovsky paid $100m for a controlling interest in the major Russian Sibneft oil company, then valued at $150 million. Berezovsky subsequently sold his stake to Abramovich after fleeing to London. In September 2005 Abramovich sold his interest in Sibneft to state energy giant Gazprom for $13 billion.

Despite maintaining that his primary residence is Moscow, in 2006 Abramovich was named as the second-wealthiest person in the United Kingdom. His property investments and other assets were estimated at £10.8 billion. In June 2003, Abramovich became the owner of the companies that control Chelsea Football Club (soccer club). He also became the world's greatest spender on luxury yachts, with four boats in what the media have called the 'Abramovich Navy'.

Although he rarely visits the area, in October 2005 Abramovich was reappointed governor of the impoverished Chukotka Autonomous Okrug in the Russian Far East where he has made significant financial contributions. He was originally elected to the governorship in 1999.

In the news

13 December 2024 – Russian invasion of Ukraine

Russia launches one of its largest attacks on the Ukrainian energy infrastructure since the conflict began, with about 290 missiles fired and drones striking multiple regions. The Russian Defense Ministry claims that the attack was in response to a recent Ukrainian ATACMS attack on Taganrog-Central air base in Rostov Oblast, Russia. (The Kyiv Independent) (UNN)

4 December 2024 – 2024 Cuba blackouts

Another round of blackouts in Cuba leave millions of households without power. The energy ministry says that it is prioritizing restoring electricity to hospitals and water pumping facilities. (Reuters)

30 November 2024 – Ibar-Lepenac attack

Police arrest eight people linked to an explosion on a canal near Zubin Potok, Mitrovica District, Kosovo, that supplies water to the country's two main power plants. The Kosovar government blames Serbia for the "terrorist" acts, which Serbia denies. (Al Jazeera) (Euronews) (Le Monde)

28 November 2024 – Russian invasion of Ukraine

Russian strikes against Ukrainian infrastructure, Ukrainian energy crisis

General images

The following are images from various energy-related articles on Wikipedia.

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  Sample of diesel fuel (from Oil refinery)
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  Anti-nuclear protest near nuclear waste disposal centre at Gorleben in northern Germany (from Nuclear power)
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  Enhanced geothermal system 1:Reservoir 2:Pump house 3:Heat exchanger 4:Turbine hall 5:Production well 6:Injection well 7:Hot water to district heating 8:Porous sediments 9:Observation well 10:Crystalline bedrock (from Geothermal power)
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  Typical composition of uranium dioxide fuel before and after approximately three years in the once-through nuclear fuel cycle of a LWR (from Nuclear power)
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  Electrified transport and renewable energy are key areas of investment for the renewable energy transition. (from Sustainable energy)
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  Ivanpah Solar Electric Generating System with all three towers under load (from Solar power)
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  Neste Oil refinery in Porvoo, Finland (from Oil refinery)
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  Sulphur (from Oil refinery)
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  Baton Rouge Refinery (the fifth-largest in the United States) (from Oil refinery)
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  Olkiluoto 3 under construction in 2009. It was the first EPR, a modernized PWR design, to start construction. (from Nuclear power)
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  Natural gas processing plant in Aderklaa, Lower Austria (from Natural gas)
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  Electricity production by source (from Solar power)
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  United States and USSR/Russian nuclear weapons stockpiles, 1945–2006. The Megatons to Megawatts Program was the main driving force behind the sharp reduction in the quantity of nuclear weapons worldwide since the cold war ended. (from Nuclear power)
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  Motor oil (from Oil refinery)
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  Deaths caused by use of fossil fuels such as natural gas (areas of rectangles in chart) greatly exceed those resulting from production of wind energy, nuclear energy or solar energy (rectangles barely visible in chart). (from Natural gas)
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  Several countries and the European Union have committed to dates for all new cars to be zero-emissions vehicles. (from Sustainable energy)
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  Sample of crude oil (petroleum) (from Oil refinery)
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  Burning of natural gas coming out of the ground (from Natural gas)
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  Part of the Senftenberg Solarpark, a solar photovoltaic power plant located on former open-pit mining areas close to the city of Senftenberg, in Eastern Germany. The 78 MW Phase 1 of the plant was completed within three months. (from Solar power)
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  Battery storage facility
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  Pico hydroelectricity in Mondulkiri, Cambodia (from Hydroelectricity)
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  Nuclear fuel assemblies being inspected before entering a pressurized water reactor in the United States (from Nuclear power)
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  Benefitting from favorable policies and declining costs of modules, photovoltaic solar installation has grown consistently. In 2023, China added 60% of the world's new capacity. (from Solar power)
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  The Ikata Nuclear Power Plant, a pressurized water reactor that cools by using a secondary coolant heat exchanger with a large body of water, an alternative cooling approach to large cooling towers (from Nuclear power)
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  The outdoor section of a heat pump. In contrast to oil and gas boilers, they use electricity and are highly efficient. As such, electrification of heating can significantly reduce emissions. (from Sustainable energy)
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  Part of the 354 MW Solar Energy Generating Systems (SEGS) parabolic trough solar complex in northern San Bernardino County, California (from Solar power)
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  Pile of asphalt-covered aggregate for formation into asphalt concrete (from Oil refinery)
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  Peoples Gas Manlove Field natural gas storage area in Newcomb Township, Champaign County, Illinois. In the foreground (left) is one of the numerous wells for the underground storage area, with an LNG plant, and above-ground storage tanks are in the background (right). (from Natural gas)
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  The launching ceremony of the USS Nautilus January 1954. In 1958 it would become the first vessel to reach the North Pole. (from Nuclear power)
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  Passive cooling features, such as these windcatcher towers in Iran, bring cool air into buildings without any use of energy. (from Sustainable energy)
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  The Warwick Castle water-powered generator house, used for the generation of electricity for the castle from 1894 until 1940 (from Hydroelectricity)
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  Trends in the top five geothermal electricity-generating countries, 1980–2012 (US EIA) (from Geothermal power)
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  A woman in rural Rajasthan, India, collects firewood. The use of wood and other polluting fuels for cooking causes millions of deaths each year from indoor and outdoor air pollution. (from Sustainable energy)
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  Wind turbines in Xinjiang, China
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  South America (from Solar power)
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  Cylinders of liquified petroleum gas (from Oil refinery)
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  Australia (from Solar power)
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  Cooling towers at a geothermal power plant in Larderello, Italy
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  A Washington, D.C. Metrobus, which runs on natural gas (from Natural gas)
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  Countries by natural gas proven reserves (2014), based on data from The World Factbook (from Natural gas)
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  North America (from Solar power)
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  The Ffestiniog Power Station can generate 360 MW of electricity within 60 seconds of the demand arising. (from Hydroelectricity)
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  Sample of kerosene (from Oil refinery)
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  Refinery of Slovnaft in Bratislava (from Oil refinery)
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  The first light bulbs ever lit by electricity generated by nuclear power at EBR-1 at Argonne National Laboratory-West, December 20, 1951. (from Nuclear power)
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  Schematic of the ITER tokamak under construction in France (from Nuclear power)
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  A geothermal power station in Negros Oriental, Philippines (from Geothermal power)
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  Seasonal cycle of capacity factors for wind and photovoltaics in Europe shown under idealized assumptions. The figure illustrates the balancing effects of wind and solar energy at the seasonal scale (Kaspar et al., 2019). (from Solar power)
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  Proportions of the isotopes uranium-238 (blue) and uranium-235 (red) found in natural uranium and in enriched uranium for different applications. Light water reactors use 3–5% enriched uranium, while CANDU reactors work with natural uranium. (from Nuclear power)
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  Refinery, Bayport Industrial Complex, Harris County, Texas (from Oil refinery)
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  Polyethylene plastic main being placed in a trench (from Natural gas)
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  Clean energy investment has benefited from post-pandemic economic recovery, a global energy crisis involving high fossil fuel prices, and growing policy support across various nations. (from Sustainable energy)
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  The town of Pripyat abandoned since 1986, with the Chernobyl plant and the Chernobyl New Safe Confinement arch in the distance (from Nuclear power)
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  Storage tanks and towers at Shell Puget Sound Refinery (Shell Oil Company), Anacortes, Washington (from Oil refinery)
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  Natural gas burning on a gas stove (from Natural gas)
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  Installed geothermal energy capacity, 2022 (from Geothermal power)
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  Most waste packaging, small-scale experimental fuel recycling chemistry and radiopharmaceutical refinement is conducted within remote-handled hot cells. (from Nuclear power)
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  The 120-MW_e Nesjavellir power station in southwest Iceland (from Geothermal power)
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  Yearly geothermal generation by continent (from Geothermal power)
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  Yearly hydro generation by continent (from Hydroelectricity)
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  The U.S. and Russia have been the predominant producers of natural gas. (from Natural gas)
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  The guided-missile cruiser USS Monterey (CG 61) receives fuel at sea (FAS) from the Nimitz-class aircraft carrier USS George Washington (CVN 73). (from Nuclear power)
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  For cooking, electric induction stoves are one of the most energy-efficient and safest options. (from Sustainable energy)
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  Europe (from Solar power)
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  The location of shale gas compared to other types of gas deposits (from Natural gas)
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  The share of electricity production from solar, 2023 (from Solar power)
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  Map of solar resources from World bank (from Solar power)
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  Death rates per unit of electricity production for different energy sources (from Nuclear power)
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  The Calder Hall nuclear power station in the United Kingdom, the world's first commercial nuclear power station. (from Nuclear power)
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  The warming influence (called radiative forcing) of long-lived greenhouse gases has increased substantially in the last 40 years, with carbon dioxide and methane being the dominant drivers of global warming. (from Natural gas)
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  Global energy usage is highly unequal. High income countries such as the United States and Canada use 100 times as much energy per capita as some of the least developed countries in Africa. (from Sustainable energy)
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  Natural gas drilling rig in Texas, US (from Natural gas)
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  A breakdown of the products made from a typical barrel of US oil (from Oil refinery)
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  The multi-mission radioisotope thermoelectric generator (MMRTG), used in several space missions such as the Curiosity Mars rover (from Nuclear power)
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  Bloomberg NEF reported that in 2022, global energy transition investment equaled fossil fuels investment for the first time. (from Sustainable energy)
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  Schematic flow diagram of a typical crude oil distillation unit as used in petroleum crude oil refineries (from Oil refinery)
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  Since 1985, the proportion of electricity generated from low-carbon sources has increased only slightly. Advances in deploying renewables have been mostly offset by declining shares of nuclear power. (from Sustainable energy)
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  Kenyan dairy farmer lighting a biogas lamp. Biogas produced from biomass is a renewable energy source that can be burned for cooking or light. (from Sustainable energy)
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  A micro-hydro facility in Vietnam (from Hydroelectricity)
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  The Leibstadt Nuclear Power Plant in Switzerland (from Nuclear power)
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  The nuclear fuel cycle begins when uranium is mined, enriched, and manufactured into nuclear fuel (1), which is delivered to a nuclear power plant. After use, the spent fuel is delivered to a reprocessing plant (2) or to a final repository (3). In nuclear reprocessing, 95% of spent fuel can potentially be recycled to be returned to use in a power plant (4). (from Nuclear power)
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  Merowe Dam in Sudan. Hydroelectric power stations that use dams submerge large areas of land due to the requirement of a reservoir. These changes to land color or albedo, alongside certain projects that concurrently submerge rainforests, can in these specific cases result in the global warming impact, or equivalent life-cycle greenhouse gases of hydroelectricity projects, to potentially exceed that of coal power stations. (from Hydroelectricity)
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  Activity of spent UOx fuel in comparison to the activity of natural uranium ore over time (from Nuclear power)
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  Example of energy policy decisions: The goal of the Southern Gas Corridor, which connects the giant Shah Deniz gas field in Azerbaijan to Europe, is to reduce Europe's dependency on Russian gas. (from Energy policy)
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  Thomas Young - the first to use the term "energy" to refer to kinetic energy in its modern sense, in 1802. (from History of energy)
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  Measurement of the tailrace and forebay rates at the Limestone Generating Station in Manitoba, Canada. (from Hydroelectricity)
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  Grangemouth Refinery, in Scotland (from Oil refinery)
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  Schematic flow diagram of a typical natural gas processing plant (from Natural gas)
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  Africa and Middle East (from Solar power)
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  Life-cycle greenhouse gas emissions of electricity supply technologies, median values calculated by IPCC (from Nuclear power)
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  Oil refinery in Iran (from Oil refinery)
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  Following the 2011 Fukushima Daiichi nuclear disaster, the world's worst nuclear accident since 1986, 50,000 households were displaced after radiation leaked into the air, soil and sea. Radiation checks led to bans of some shipments of vegetables and fish. (from Nuclear power)
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  Crude oil is separated into fractions by fractional distillation. The fractions at the top of the fractionating column have lower boiling points than the fractions at the bottom. The heavy bottom fractions are often cracked into lighter, more useful products. All of the fractions are processed further in other refining units. (from Oil refinery)
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  Museum Hydroelectric power plant "Under the Town" in Užice, Serbia, built in 1900. (from Hydroelectricity)
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  Fire-extinguishing operations after the Texas City refinery explosion (from Oil refinery)
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  A sugarcane plantation to produce ethanol in Brazil (from Sustainable energy)
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  Geothermal power center in the Usulután Department, El Salvador (from Geothermal power)
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  The Three Gorges Dam in Central China is the world's largest power-producing facility of any kind. (from Hydroelectricity)
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  Reactor decay heat as a fraction of full power after the reactor shutdown, using two different correlations. To remove the decay heat, reactors need cooling after the shutdown of the fission reactions. A loss of the ability to remove decay heat caused the Fukushima accident. (from Nuclear power)
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  Actual annual deployments of solar PV vs predictions by the IEA for the period 2002–2016. Predictions have largely and consistently underestimated actual growth. (from Solar power)
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  Deaths caused as a result of fossil fuel use (areas of rectangles in chart) greatly exceed those resulting from production of sustainable energy (rectangles barely visible in chart). (from Sustainable energy)
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  Manhole for domestic gas supply, London, UK (from Natural gas)
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  Share of electricity production from nuclear, 2023 (from Nuclear power)
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  The oil refinery in Haifa, Israel, is capable of processing about 9 million tons (66 million barrels) of crude oil a year. Its two cooling towers are landmarks of the city's skyline. (from Oil refinery)
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  A comparison of prices over time for energy from nuclear fission and from other sources. Over the presented time, thousands of wind turbines and similar were built on assembly lines in mass production resulting in an economy of scale. While nuclear remains bespoke, many first of their kind facilities added in the timeframe indicated and none are in serial production.Our World in Data notes that this cost is the global average, while the 2 projects that drove nuclear pricing upwards were in the US. The organization recognises that the median cost of the most exported and produced nuclear energy facility in the 2010s the South Korean APR1400, remained "constant", including in export.
  LCOE is a measure of the average net present cost of electricity generation for a generating plant over its lifetime. As a metric, it remains controversial as the lifespan of units are not independent but manufacturer projections, not a demonstrated longevity. (from Nuclear power)
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  Gas network emergency vehicle responding to a major fire in Kyiv, Ukraine (from Natural gas)
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  Yearly solar generation by continent (from Solar power)
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  Dry cask storage vessels storing spent nuclear fuel assemblies (from Nuclear power)
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  A pipeline odorant injection station (from Natural gas)
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  A gas bill from Baltimore, Maryland, 1834, for manufactured coal gas, before the introduction of ground-extracted methane gas. (from Natural gas)
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  Construction close to high pressure gas transmission pipelines is discouraged, often with standing warning signs. (from Natural gas)
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  Share of electricity production from hydropower, 2023 (from Hydroelectricity)
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  A parabolic collector concentrates sunlight onto a tube in its focal point. (from Solar power)
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  Geothermal generation by country, 2021 (from Geothermal power)
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  The growth of solar PV on a semi-log scale since 1996 (from Solar power)
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  Anacortes Refinery, on the north end of March Point southeast of Anacortes, Washington, United States (from Oil refinery)
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  Net metering, unlike a feed-in tariff, requires only one meter, but it must be bi-directional. (from Solar power)
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  Global geothermal electric capacity. Upper red line is installed capacity; lower green line is realized production. (from Geothermal power)
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  Jamnagar Refinery, the world's largest oil refinery, in Gujarat, India (from Oil refinery)
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  Natural gas extraction by countries in cubic meters per year around 2013 (from Natural gas)
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  Nuclear waste flasks generated by the United States during the Cold War are stored underground at the Waste Isolation Pilot Plant (WIPP) in New Mexico. The facility is seen as a potential demonstration for storing spent fuel from civilian reactors. (from Nuclear power)
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  Hydro generation by country, 2021 (from Hydroelectricity)
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  Utility cycling infrastructure, such as this bike lane in Vancouver, encourages sustainable transport. (from Sustainable energy)
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  Growth of worldwide nuclear power generation (from Nuclear power)
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  Cracks at the historic Town Hall of Staufen im Breisgau presumed due to damage from geothermal drilling (from Geothermal power)
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  World map showing where people without access to electricity lived in 2016⁠—mainly in sub-Saharan Africa and the Indian subcontinent (from Sustainable energy)
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  Russia was a key oil and gas supplier to Europe (map from 2013). This changed with the Russian invasion of Ukraine in 2022. (from Energy policy)
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  South and South-East Asia (from Solar power)
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  Greenhouse gas emissions per energy source. Solar power is one of the sources with the least greenhouse gas emissions. (from Solar power)
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  Acceptance of wind and solar facilities in one's community is stronger among U.S. Democrats (blue), while acceptance of nuclear power plants is stronger among U.S. Republicans (red). (from Solar power)
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  Schematics of a grid-connected residential PV power system (from Solar power)
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  Sample of gasoline (from Oil refinery)
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  Guri Dam, a hydroelectric dam in Venezuela (from Sustainable energy)
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  Community solar farm in the town of Wheatland, Wisconsin (from Solar power)
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  Buildings in the Solar Settlement at Schlierberg, Germany, produce more energy than they consume. They incorporate rooftop solar panels and are built for maximum energy efficiency. (from Sustainable energy)
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  The status of nuclear power globally (click for legend) (from Nuclear power)
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  The Hoover Dam in the United States is a large conventional dammed-hydro facility, with an installed capacity of 2,080 MW. (from Hydroelectricity)
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  A photovoltaic power station in California, United States

Quotations

• "Breaking the dependence on oil is, in my view, a matter of political will. A consistent policy will turn obstacles into opportunities. To hide behind excuses of ignorance or economic considerations is not leading us to a sustainable future." – Mona Sahlin, 2006
• "America is addicted to oil, which is often imported from unstable parts of the world. The best way to break this addiction is through technology." – George W. Bush, 2006
• "Energy independence [for India] has to be our nation's first and highest priority. We must be determined to achieve this within the next 25 years i.e. by the year 2030." – Abdul Kalam, 2005
• "Energy security is assuming a strategic significance once reserved for territorial security, and the global environmental challenges from energy production and use are amongst our most pressing." – John Howard, 2006

Related portals

WikiProjects

WikiProjects connected with energy:

• WikiProject Energy
• Oil megaprojects task force

Other WikiProjects that may be of interest:

• WikiProject Environment
• WikiProject Technology
• WikiProject Biography

Major topics

Fossil fuels

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E=mc²

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