Net energy gain, the Glossary
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.[1]
Table of Contents
34 relations: Athabasca oil sands, Biofuel, Biomass, Certification, Coal, Coefficient of performance, Combustion, Electrical energy, Energy cannibalism, Energy carrier, Energy economics, Energy return on investment, Ethanol, Ethanol fuel energy balance, Externality, Fertilizer, Fossil fuel, Geothermal energy, Hydroelectricity, International Organization for Standardization, Joule, Label, Maize, Mechanical energy, Natural gas, Net (economics), Oil and gas reserves and resource quantification, Petroleum, Price of oil, Renewable resource, Solar power, Sustainable energy, Thermal energy, Wind power.
Athabasca oil sands
The Athabasca oil sands, also known as the Athabasca tar sands, are large deposits of bitumen, a heavy and viscous form of petroleum, located in northeastern Alberta, Canada.
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Biofuel
Biofuel is a fuel that is produced over a short time span from biomass, rather than by the very slow natural processes involved in the formation of fossil fuels such as oil.
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Biomass
Biomass is a term used in several contexts: in the context of ecology it means living organisms, and in the context of bioenergy it means matter from recently living (but now dead) organisms.
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Certification
Certification is part of testing, inspection and certification and the provision by an independent body of written assurance (a certificate) that the product, service or system in question meets specific requirements.
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Coal
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.
Coefficient of performance
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required.
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Combustion
Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
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Electrical energy
Electrical energy is energy related to forces on electrically charged particles and the movement of those particles (often electrons in wires, but not always).
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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. Net energy gain and energy cannibalism are energy economics.
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Energy carrier
An energy carrier is a substance (fuel) or sometimes a phenomenon (energy system) that contains energy that can be later converted to other forms such as mechanical work or heat or to operate chemical or physical processes.
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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 return on investment
In energy economics and ecological energetics, energy return on investment (EROI), also sometimes called energy returned on energy invested (ERoEI), 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. Net energy gain and energy return on investment are energy economics.
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Ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula.
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Ethanol fuel energy balance
† depending on production method In order to create ethanol, all biomass needs to go through some of these steps: it needs to be grown, collected, dried, fermented, and burned.
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Externality
In economics, an externality or external cost is an indirect cost or benefit to an uninvolved third party that arises as an effect of another party's (or parties') activity.
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Fertilizer
A fertilizer (American English) or fertiliser (British English) is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients.
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Fossil fuel
A fossil fuel is a carbon compound- or hydrocarbon-containing material such as coal, oil, and natural gas, formed naturally in the Earth's crust from the remains of prehistoric organisms (animals, plants and planktons), a process that occurs within geological formations.
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Geothermal energy
Geothermal energy is thermal energy extracted from the Earth's crust.
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Hydroelectricity
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power).
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International Organization for Standardization
The International Organization for Standardization (ISO) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries.
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Joule
The joule (pronounced, or; symbol: J) is the unit of energy in the International System of Units (SI).
Label
A label (as distinct from signage) is a piece of paper, plastic film, cloth, metal, or other material affixed to a container or product, on which is written or printed information or symbols about the product or item.
Maize
Maize (Zea mays), also known as corn in North American English, is a tall stout grass that produces cereal grain.
Mechanical energy
In physical sciences, mechanical energy is the sum of potential energy and kinetic energy.
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Natural gas
Natural gas (also called fossil gas, methane gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane (95%) in addition to various smaller amounts of other higher alkanes.
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Net (economics)
A net (sometimes written nett) value is the resultant amount after accounting for the sum or difference of two or more variables.
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Oil and gas reserves and resource quantification
Oil and gas reserves denote discovered quantities of crude oil and natural gas (oil or gas '''fields''') that can be profitably produced/recovered from an approved development.
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Petroleum
Petroleum or crude oil, also referred to as simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations.
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Price of oil
The price of oil, or the oil price, generally refers to the spot price of a barrel of benchmark crude oil—a reference price for buyers and sellers of crude oil such as West Texas Intermediate (WTI), Brent Crude, Dubai Crude, OPEC Reference Basket, Tapis crude, Bonny Light, Urals oil, Isthmus, and Western Canadian Select (WCS).
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Renewable resource
A renewable resource (also known as a flow resource) is a natural resource which will replenish to replace the portion depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale.
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Solar power
Solar power, also known as solar electricity, is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power.
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Sustainable energy
Energy is sustainable if it "meets the needs of the present without compromising the ability of future generations to meet their own needs." Definitions of sustainable energy usually look at its effects on the environment, the economy and society. Net energy gain and sustainable energy are energy economics.
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Thermal energy
The term "thermal energy" is used loosely in various contexts in physics and engineering, generally related to the kinetic energy of vibrating and colliding atoms in a substance.
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Wind power
Wind power is the use of wind energy to generate useful work.
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References
[1] https://en.wikipedia.org/wiki/Net_energy_gain
Also known as Energy pay-back, Energy payback, Energy payback time, ISO 13602, Net energy, Net energy balance, Net energy yield, Technical energy system.