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Energy returned on energy invested

Index Energy returned on energy invested

In physics, energy economics, and ecological energetics, energy returned on energy invested (EROEI or ERoEI); or energy return on investment (EROI), is the ratio of the amount of usable energy (the exergy) delivered from a particular energy resource to the amount of exergy used to obtain that energy resource. [1]

68 relations: Algeria, BN-600 reactor, BN-800 reactor, Breeder reactor, Calorie, Cambridge University Press, Cogeneration, Compressed air energy storage, Cost of electricity by source, David Ricardo, Deforestation, Desalination, District heating, Embodied energy, Emergy, Energetics, Energy, Energy balance, Energy cannibalism, Energy conversion efficiency, Energy economics, Energy quality, Energy slave, Environmental degradation, Exergy, Fissile material, Fossil fuel, Frederick, Maryland, GDP deflator, Greenhouse gas, Holznot, Human Development Index, Involution (mathematics), Japan, Jevons paradox, Joseph Tainter, Khazzoom–Brookes postulate, Lead–acid battery, Lithium-ion battery, Maya civilization, Net energy gain, Nuclear fission, Opportunity cost, Payback period, Photosynthesis, Physics, Portsmouth Gaseous Diffusion Plant, Primary energy, Pumped-storage hydroelectricity, Ratio, ..., Relative price, Renewable and Sustainable Energy Reviews, Richard Heinberg, Roman Empire, Sahara Solar Breeder Project, Social metabolism, Sodium–sulfur battery, Solar irradiance, The Party's Over: Oil, War, and the Fate of Industrial Societies, Thomas Homer-Dixon, Trajan, Vanadium redox battery, Waste heat, Watt, Wealth, Wind turbine, World energy consumption, Zinc–bromine battery. Expand index (18 more) »

Algeria

Algeria (الجزائر, familary Algerian Arabic الدزاير; ⴷⵣⴰⵢⴻⵔ; Dzayer; Algérie), officially the People's Democratic Republic of Algeria, is a sovereign state in North Africa on the Mediterranean coast.

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BN-600 reactor

The BN-600 reactor is a sodium-cooled fast breeder reactor, built at the Beloyarsk Nuclear Power Station, in Zarechny, Sverdlovsk Oblast, Russia.

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BN-800 reactor

The BN-800 reactor is a sodium-cooled fast breeder reactor, built at the Beloyarsk Nuclear Power Station, in Zarechny, Sverdlovsk Oblast, Russia.

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Breeder reactor

A breeder reactor is a nuclear reactor that generates more fissile material than it consumes.

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Calorie

A calorie is a unit of energy.

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Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

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Cogeneration

Cogeneration or combined heat and power (CHP) is the use of a heat engine or power station to generate electricity and useful heat at the same time.

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Compressed air energy storage

Compressed air energy storage (CAES) is a way to store energy generated at one time for use at another time using compressed air.

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Cost of electricity by source

In electrical power generation, the distinct ways of generating electricity incur significantly different costs.

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David Ricardo

David Ricardo (18 April 1772 – 11 September 1823) was a British political economist, one of the most influential of the classical economists along with Thomas Malthus, Adam Smith and James Mill.

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Deforestation

Deforestation, clearance, or clearing is the removal of a forest or stand of trees where the land is thereafter converted to a non-forest use.

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Desalination

Desalination is a process that extracts mineral components from saline water.

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District heating

District heating (also known as heat networks or teleheating) is a system for distributing heat generated in a centralized location for residential and commercial heating requirements such as space heating and water heating.

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Embodied energy

Embodied energy is the sum of all the energy required to produce any goods or services, considered as if that energy was incorporated or 'embodied' in the product itself.

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Emergy

Emergy is the amount of energy that was consumed in direct and indirect transformations to make a product or service.

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Energetics

Energetics (also called energy economics) is the study of energy under transformation.

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Energy

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

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Energy balance

Energy balance may refer to.

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Energy cannibalism

Energy cannibalism refers to an effect where rapid growth of a specific energy producing industry creates a need for energy that uses (or cannibalizes) the energy of existing power plants.

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Energy conversion efficiency

Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms.

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Energy economics

Energy economics is a broad scientific subject area which includes topics related to supply and use of energy in societies.

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Energy quality

Energy quality is the contrast between different forms of energy, the different trophic levels in ecological systems and the propensity of energy to convert from one form to another.

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Energy slave

An energy slave is that quantity of energy (ability to do work) which, when used to construct and drive non-human infrastructure (machines, roads, power grids, fuel, draft animals, wind-driven pumps, etc.) replaces a unit of human labor (actual work).

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Environmental degradation

Environmental degradation is the deterioration of the environment through depletion of resources such as air, water and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution.

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Exergy

In thermodynamics, the exergy (in older usage, available work or availability) of a system is the maximum useful work possible during a process that brings the system into equilibrium with a heat reservoir.

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Fissile material

In nuclear engineering, fissile material is material capable of sustaining a nuclear fission chain reaction.

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Fossil fuel

A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.

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Frederick, Maryland

Frederick is a city in, and the county seat of, Frederick County in the U.S. state of Maryland.

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GDP deflator

In economics, the GDP deflator (implicit price deflator) is a measure of the level of prices of all new, domestically produced, final goods and services in an economy.

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Greenhouse gas

A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range.

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Holznot

Holznot (German for wood shortage) is a historic term for an existing or imminent supply crisis of wood.

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Human Development Index

The Human Development Index (HDI) is a composite statistic (composite index) of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development.

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Involution (mathematics)

In mathematics, an involution, or an involutory function, is a function that is its own inverse, for all in the domain of.

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Japan

Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.

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Jevons paradox

In economics, the Jevons paradox (sometimes Jevons effect) occurs when technological progress increases the efficiency with which a resource is used (reducing the amount necessary for any one use), but the rate of consumption of that resource rises because of increasing demand.

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Joseph Tainter

Joseph Anthony Tainter (born December 8, 1949) is an American anthropologist and historian.

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Khazzoom–Brookes postulate

In the 1980s, the economists Daniel Khazzoom and Leonard Brookes independently put forward ideas about energy consumption and behavior that argue that increased energy efficiency paradoxically tends to lead to increased energy consumption.

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Lead–acid battery

The lead–acid battery was invented in 1859 by French physicist Gaston Planté and is the oldest type of rechargeable battery.

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Lithium-ion battery

A lithium-ion battery or Li-ion battery (abbreviated as LIB) is a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.

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Maya civilization

The Maya civilization was a Mesoamerican civilization developed by the Maya peoples, and noted for its hieroglyphic script—the only known fully developed writing system of the pre-Columbian Americas—as well as for its art, architecture, mathematics, calendar, and astronomical system.

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Net energy gain

Net Energy Gain (NEG) is a concept used in energy economics that refers to the difference between the energy expended to harvest an energy source and the amount of energy gained from that harvest.

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Nuclear fission

In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei).

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Opportunity cost

In microeconomic theory, the opportunity cost, also known as alternative cost, is the value (not a benefit) of the choice in terms of the best alternative while making a decision.

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Payback period

Payback period in capital budgeting refers to the period of time required to recoup the funds expended in an investment, or to reach the break-even point.

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Photosynthesis

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities (energy transformation).

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Physics

Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.

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Portsmouth Gaseous Diffusion Plant

The Portsmouth Gaseous Diffusion Plant is a facility located in Scioto Township, Pike County, Ohio, just south of Piketon, Ohio that previously produced enriched uranium, including weapons-grade uranium, for the United States Atomic Energy program and U.S. nuclear weapons program.

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Primary energy

Primary energy (PE) is an energy form found in nature that has not been subjected to any human engineered conversion process.

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Pumped-storage hydroelectricity

Pumped-storage hydroelectricity (PSH), or pumped hydroelectric energy storage (PHES), is a type of hydroelectric energy storage used by electric power systems for load balancing.

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Ratio

In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.

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Relative price

A relative price is the price of a commodity such as a good or service in terms of another; i.e., the ratio of two prices.

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Renewable and Sustainable Energy Reviews

Renewable and Sustainable Energy Reviews is a peer-reviewed scientific journal covering research on sustainable energy.

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Richard Heinberg

Richard William Heinberg (born October 21, 1950) is an American journalist and educator who has written extensively on energy, economic, and ecological issues, including oil depletion.

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Roman Empire

The Roman Empire (Imperium Rōmānum,; Koine and Medieval Greek: Βασιλεία τῶν Ῥωμαίων, tr.) was the post-Roman Republic period of the ancient Roman civilization, characterized by government headed by emperors and large territorial holdings around the Mediterranean Sea in Europe, Africa and Asia.

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Sahara Solar Breeder Project

The Sahara Solar Breeder Project is a joint Japanese-Algerian universities plan to use the abundant solar energy and sand in the Sahara desert to build silicon manufacturing plants, and solar power plants, in a way that their products are used in a "breeding" manner to build more and more such plants.

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Social metabolism

Social metabolism or socioeconomic metabolism is the set of flows of materials and energy that occur between Nature and society, between different societies, and within societies.

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Sodium–sulfur battery

A sodium–sulfur battery is a type of molten-salt battery constructed from liquid sodium (Na) and sulfur (S).

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Solar irradiance

Solar irradiance is the power per unit area received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument.

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The Party's Over: Oil, War, and the Fate of Industrial Societies

The Party’s Over: Oil, War and the Fate of Industrial Societies, by Richard Heinberg, is an introduction to the concept of peak oil and petroleum depletion.

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Thomas Homer-Dixon

Thomas Homer-Dixon (born 1956) is a Canadian political scientist and ecologist, and Professor in the Centre for Environment and Business University of Waterloo in the Faculty of Environment, with a cross-appointment to the Political Science Department in the Faculty of Arts.

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Trajan

Trajan (Imperator Caesar Nerva Trajanus Divi Nervae filius Augustus; 18 September 538August 117 AD) was Roman emperor from 98 to 117AD.

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Vanadium redox battery

The vanadium redox battery (VRB), also known as vanadium flow battery (VFB) or vanadium redox flow battery (VRFB), is a type of rechargeable flow battery that employs vanadium ions in different oxidation states to store chemical potential energy.

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Waste heat

Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work.

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Watt

The watt (symbol: W) is a unit of power.

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Wealth

Wealth is the abundance of valuable resources or valuable material possessions.

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Wind turbine

A wind turbine is a device that converts the wind's kinetic energy into electrical energy.

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World energy consumption

World energy consumption is the total energy used by the entire human civilization.

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Zinc–bromine battery

The zinc–bromine flow battery is a type of hybrid flow battery.

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Redirects here:

EROEI, Energy Return On Investment, Energy Return on Energy Invested, Energy Return on Investment, Energy Returned On Energy Invested, Energy Returned on Energy Invested, Energy return on energy invested, Net energy ratio, Net energy return.

References

[1] https://en.wikipedia.org/wiki/Energy_returned_on_energy_invested

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