This is a list of acronyms found in the context of energy issues.

A

*AAQS— Ambient Air Quality Standards (environment) (US) *AAU—

Assigned amount units An assigned amount unit is a tradable "Kyoto unit" or "carbon credit" representing an allowance to emit greenhouse gases comprising "one metric tonne of carbon dioxide equivalent, calculated using global warming potentials". Assigned amount units a ...

(measurement) *ABT— Availability based tariff (electricity) *ABF—Aquatic Base Flow (

Hydropower Hydropower (from el, ὕδωρ, "water"), also known as water power, is the use of falling or fast-running water to Electricity generation, produce electricity or to power machines. This is achieved by energy transformation, converting the Pot ...

) (electricity) *AC—

Alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in whic ...

*ACA—Annual Charge Adjustment (electricity) *ACE—Area Control Error (electricity) *ACEEE—

American Council for an Energy-Efficient Economy The American Council for an Energy-Efficient Economy (ACEEE) is a nonprofit, 501(c)(3) organization. Founded in 1980, ACEEE's mission is to act as a catalyst to advance energy efficiency policies, programs, technologies, investments, and behavi ...

*ACRS— Accelerated Cost Recovery System (finance) *ADITC—Accumulated Deferred Investment Tax Credit (policy) *ADR—Asset Depreciation Range (finance) *AEP—

American Electric Power American Electric Power (AEP), (railcar reporting mark: AEPX) is a major investor-owned electric utility in the United States, delivering electricity to more than five million customers in 11 states. AEP ranks among the nation's largest gen ...

(electricity) *AESO—

Alberta Electric System Operator The Alberta Electric System Operator, (AESO), is the non-profit organization responsible for operating Alberta, Canada's power grid. AESO oversees the planning and operation of the Alberta Interconnected Electric System (AIES) in a "safe, reliable, ...

*AFE—Authority for Expenditure or Authorization for Expenditure *AFUDC—allowance for funds used during construction *AFV—

Alternative fuel vehicle An alternative fuel vehicle is a motor vehicle that runs on alternative fuel rather than traditional petroleum fuels (petrol or diesel fuel, petrodiesel). The term also refers to any technology (e.g. electric car, hybrid electric vehicles, Solar ...

*AGA—

American Gas Association The American Gas Association (AGA) is an American trade organization founded in 1918 representing and advocating on behalf of local energy companies that deliver natural gas throughout the United States. History The American Gas Association forme ...

*AGC—

Automatic generation control In an electric power system, automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load. Since a power grid requires that generation and load ...

*AGD—Associated Gas Distributors (US) *AIEE—

American Institute of Electrical Engineers The American Institute of Electrical Engineers (AIEE) was a United States-based organization of electrical engineers that existed from 1884 through 1962. On January 1, 1963, it merged with the Institute of Radio Engineers (IRE) to form the Instit ...

*AIMA—Agricultural Impact Mitigation Agreement (US) *ALJ—

Administrative law judge An administrative law judge (ALJ) in the United States is a judge and trier of fact who both presides over trials and adjudicates claims or disputes involving administrative law. ALJs can administer oaths, take testimony, rule on questions of evid ...

*AMBO— Armenia, Macedonia, Bulgaria Oil pipeline *AMI—

Advanced metering infrastructure A smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor. Smart meters communicate the information to the consumer for greater clarity of consumption beha ...

*AMR— Automated meter reading also known as Automatic Meter Reading *AMRA— Automatic Meter Reading Association *ANGTA—Alaskan Natural Gas Transportation Act of 1977 to build the Alaska gas pipeline *ANGTS—Alaskan Natural Gas Transportation System *ANSI—

American National Standards Institute The American National Standards Institute (ANSI ) is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The organi ...

*AOS—Authorized Overrun Service *APA— Administrative Procedure Act **—Alaska Power Administration *APE—Area of potential effect (electricity) *API—

American Petroleum Institute The American Petroleum Institute (API) is the largest U.S. trade association for the oil and natural gas industry. It claims to represent nearly 600 corporations involved in production, refinement, distribution, and many other aspects of the pet ...

(oil) *APPA—American Public Power Association (electricity) *APR—Actual peak reduction (e.g. in

demand response Demand response is a change in the power consumption of an electric utility customer to better match the demand for power with the supply. Until the 21st century decrease in the cost of pumped storage and batteries electric energy could not be ...

systems) (electricity) *AQCR—Air Quality Control Region (US) (environment) *ARA—(in shipping) ports of

Amsterdam Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population ...

–

Rotterdam Rotterdam ( , , , lit. ''The Dam on the River Rotte'') is the second largest city and municipality in the Netherlands. It is in the province of South Holland, part of the North Sea mouth of the Rhine–Meuse–Scheldt delta, via the ''"N ...

–

Antwerp Antwerp (; nl, Antwerpen ; french: Anvers ; es, Amberes) is the largest city in Belgium by area at and the capital of Antwerp Province in the Flemish Region. With a population of 520,504,

(oil) *ARR—Auction Revenue Rights (electricity) *ASCC—Alaskan System Coordination Council *ASE—

Alliance to Save Energy The Alliance to Save Energy is a bipartisan, nonprofit coalition of business, government, environmental, and consumer groups based in Washington, D.C. The Alliance states that it advocates for "energy-efficiency policies that minimize costs to so ...

*ASTM—

American Society for Testing and Materials ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, an ...

*ATC—Available transfer capability *AVR—

Automatic Voltage Regulator A voltage regulator is a system designed to automatically maintain a constant voltage. A voltage regulator may use a simple feed-forward design or may include negative feedback. It may use an electromechanical mechanism, or electronic componen ...

(electricity)

B

*BA—Balancing Authority *BA—Biological Assessment *BACT—

Best Available Control Technology A State Implementation Plan (SIP) is a United States state plan for complying with the federal Clean Air Act, administered by the Environmental Protection Agency (EPA). The SIP, developed by a state agency and approved by EPA, consists of narrative ...

*BBL/D—

Barrel per day A barrel is one of several units of volume applied in various contexts; there are dry barrels, fluid barrels (such as the U.K. beer barrel and U.S. beer barrel), oil barrels, and so forth. For historical reasons the volumes of some barrel units ...

*BBL/SD—

, on stream days *BBL— barrel (42 gallons) **— Balgzand Bacton Line (BBL Pipeline) *BCD—

, on calendar days *BCF—billion

cubic feet Cubic may refer to: Science and mathematics * Cube (algebra), "cubic" measurement * Cube, a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex ** Cubic crystal system, a crystal system ...

*BCP—

Blackstart __NOTOC__ The blackstart (''Oenanthe melanura'') is a chat found in desert regions in North Africa, the Middle East and the Arabian Peninsula. It is resident throughout its range. The blackstart is 14 cm long and is named for its black ...

Capability Plan *BES—Bulk electric system (

Electricity transmission Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a ''transmission network''. This is d ...

) *BfP— Bureau Fédéral du Plan (Belgium). (Has responsibilities over economic, social and environmental policy *bhp—

Brake horsepower Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...

*BIA—

Bureau of Indian Affairs The Bureau of Indian Affairs (BIA), also known as Indian Affairs (IA), is a United States federal agency within the Department of the Interior. It is responsible for implementing federal laws and policies related to American Indians and A ...

(US) *BIPV—Building Integrated Photo Voltaic *bl—

Barrel A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, ...

*BLM—

Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's la ...

United States Department of the Interior The United States Department of the Interior (DOI) is one of the executive departments of the U.S. federal government headquartered at the Main Interior Building, located at 1849 C Street NW in Washington, D.C. It is responsible for the mana ...

*BLS—

Bureau of Labor Statistics The Bureau of Labor Statistics (BLS) is a unit of the United States Department of Labor. It is the principal fact-finding agency for the U.S. government in the broad field of labor economics and statistics and serves as a principal agency of t ...

United States Department of Labor The United States Department of Labor (DOL) is one of the executive departments of the U.S. federal government. It is responsible for the administration of federal laws governing occupational safety and health, wage and hour standards, unemploym ...

*BOE—

Barrel of oil equivalent The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (, or ) of crude oil. The BOE is used by oil and gas companies in their financial statements as a way of combining oil and natur ...

(international) *BPA—

Bonneville Power Administration The Bonneville Power Administration (BPA) is an American federal agency operating in the Pacific Northwest. BPA was created by an act of Congress in 1937 to market electric power from the Bonneville Dam located on the Columbia River and to constr ...

(US) *BPL— Broadband over power line *BPS—Bulk Power System (

) *BTMG—Behind The Meter Generation *BTU—

British thermal unit The British thermal unit (BTU or Btu) is a unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. The modern SI ...

(s) *BTX—from BTX process, a mixture of

benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, ...

toluene Toluene (), also known as toluol (), is a substituted aromatic hydrocarbon. It is a colorless, water-insoluble liquid with the smell associated with paint thinners. It is a mono-substituted benzene derivative, consisting of a methyl group (CH3) at ...

, and

xylene In organic chemistry, xylene or xylol (; IUPAC name: dimethylbenzene) are any of three organic compounds with the formula . They are derived from the substitution of two hydrogen atoms with methyl groups in a benzene ring; which hydrogens are sub ...

(oil) *BuRec—

United States Bureau of Reclamation The Bureau of Reclamation, and formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and opera ...

(government) *BWR—

Boiling water reactor A boiling water reactor (BWR) is a type of light water nuclear reactor used for the generation of electrical power. It is a design different from a Soviet graphite-moderated RBMK. It is the second most common type of electricity-generating nuc ...

(nuclear)

C

*C&I—Commercial and industrial customers (

) *CA—Carbon Abatement- increasing

carbon-neutral Carbon neutrality is a state of net-zero carbon dioxide emissions. This can be achieved by balancing emissions of carbon dioxide with its removal (often through carbon offsetting) or by eliminating emissions from society (the transition to the "p ...

ity **—Control area (EU) – The portion of the generation and transmission system controlled by a single transmission system operator. (See also TSO). *CAA— Clean Air Act (US) *CAEM—Center for the Advancement of Energy Markets (US) *CAES—

Compressed Air Energy Storage Compressed-air energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods.Wild, Matthew, LWind Drives Growing Use ...

*CAFE— Corporate Average Fuel Economy standards (US) *CAISO—California Independent System Operator Corporation, a

regional transmission organization A regional transmission organization (RTO) in the United States is an electric power transmission system operator (TSO) that coordinates, controls, and monitors a multi-state electric grid. The transfer of electricity between states is considered i ...

. (US) *CAP—Capacity market programs **—

Climate Action Plan Climate is the long-term weather pattern in an area, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteorologic ...

*CAPM—

Capital asset pricing model In finance, the capital asset pricing model (CAPM) is a model used to determine a theoretically appropriate required rate of return of an asset, to make decisions about adding assets to a well-diversified portfolio. The model takes into accou ...

*CARB—

California Air Resources Board The California Air Resources Board (CARB or ARB) is the "clean air agency" of the government of California. Established in 1967 when then-governor Ronald Reagan signed the Mulford-Carrell Act, combining the Bureau of Air Sanitation and the Motor ...

*CBL—Customer Baseline Load *CBM—Capacity Benefit Margin *CBOB—Conventional Gasoline Blendstock for

Oxygenate Oxygenated chemical compounds contain oxygen as a part of their chemical structure. The term usually refers to oxygenated chemical compounds added to fuels. Oxygenates are usually employed as gasoline additives to reduce carbon monoxide and soot ...

Blending (Motor Gasoline Blending Component) *CC—

Combined cycle A combined cycle power plant is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy. On land, when used to make electricity the most common type is called a combined cycle gas turb ...

D

*DADRP—Day Ahead

Demand Response Demand response is a change in the power consumption of an electric utility customer to better match the demand for power with the supply. Until the 21st century decrease in the cost of pumped storage and batteries electric energy could not be ...

Program *DADS -Demand response Availability Data System *DANIDA—

Danish International Development Agency Danish International Development Agency (DANIDA) is the brand used by the Ministry of Foreign Affairs of Denmark when it provides humanitarian aid and development assistance to other countries, with focus on developing countries. There is no dist ...

*DA-RTP—RTP Day ahead real time pricing (regarding

Electricity meter North American domestic analog electricity meter. Electricity meter with transparent plastic case (Israel) North American domestic electronic electricity meter An electricity meter, electric meter, electrical meter, energy meter, or kilowa ...

ing) *DC—

Direct current Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even ...

*DCLM—Direct control

load management Load management, also known as demand-side management (DSM), is the process of balancing the supply of electricity on the network with the electrical load by adjusting or controlling the load rather than the power station output. This can be ach ...

*DCS—Disturbance Control Standard *DEFG—

Distributed Energy Financial Group Distribution may refer to: Mathematics *Distribution (mathematics), generalized functions used to formulate solutions of partial differential equations * Probability distribution, the probability of a particular value or value range of a vari ...

(US) *DEIS—Draft Environmental Impact Statement (US) *DER—

Distributed Energy Resources Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to ...

*DERMS— Distributed Energy Resource Management Systems *DF—Distribution Factor *DG—

Distributed generation Distributed generation, also distributed energy, on-site generation (OSG), or district/decentralized energy, is electrical generation and storage performed by a variety of small, grid-connected or distribution system-connected devices referred to ...

(electricity) **—

Directorate-General Within the European Union, Directorates-General are departments with specific zones of responsibility, the equivalent of ministries at a national level. Most are headed by a European Commissioner, responsible for the general direction of the Dir ...

(EU) (government) *DIIS—Danish Institute for International Studies (organization) *DLC—Direct load control (regarding

Load management Load management, also known as demand-side management (DSM), is the process of balancing the supply of electricity on the network with the electrical load by adjusting or controlling the load rather than the power station output. This can be ach ...

) *DME— Disturbance Monitoring Equipment *DO—

Dissolved oxygen Oxygen saturation (symbol SO2) is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium at the given temperature. It ca ...

*DoD—

Depth of discharge Depth of discharge (DoD) is an important parameter appearing in the context of rechargeable battery operation. Two non-identical definitions can be found in commercial and scientific sources. The depth of discharge is defined as: # the maximum fra ...

, energy drawn from a battery *DOE—

(government) *DOE/FE—

Office of Fossil Energy (government) *DOI—

(government) *DOT—

United States Department of Transportation The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the President of the United States and ...

(government) *DP—Distribution point *DR—

Demand response Demand response is a change in the power consumption of an electric utility customer to better match the demand for power with the supply. Until the 21st century decrease in the cost of pumped storage and batteries electric energy could not be ...

*DRAM—

and Advanced Metering Coalition *DRB—Demonstrated reserve base *DRCC—

Coordinating Council (coalition) *DRR—

resources *DRRC—

Research Center (California) *DSM—

Demand side management Energy demand management, also known as demand-side management (DSM) or demand-side response (DSR), is the modification of consumer demand for energy through various methods such as financial incentives and behavioral change through education. Us ...

*DSO—Distribution system operator (regarding

electricity distribution Electric power distribution is the final stage in the delivery of electric power; it carries electricity from the transmission system to individual consumers. Distribution substations connect to the transmission system and lower the transmissio ...

) *Dth— Dekatherm (defined as

s, also written "MMBtu") (measurement) *DTW—dealer tank wagon (as in, "oil companies setting regional dealer tank wagon pricing") (Oil)

E

*E&D—Exploration and development expenses *E85—

E85 fuel E85 is an abbreviation typically referring to an ethanol fuel blend of 85% ethanol fuel and 15% gasoline or other hydrocarbon by volume Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI d ...

: A fuel containing a mixture of 85 percent ethanol and 15 percent gasoline *E95—like

but with less gasoline. A fuel containing a mixture of 95 percent ethanol and 5 percent gasoline *EA—Environmental assessment as in an

Environmental impact assessment Environmental Impact assessment (EIA) is the assessment of the environmental consequences of a plan, policy, program, or actual projects prior to the decision to move forward with the proposed action. In this context, the term "environmental imp ...

*EAR—Estimated additional resources, as in considering reserves of uranium deposits *EC—

European Commission The European Commission (EC) is the executive of the European Union (EU). It operates as a cabinet government, with 27 members of the Commission (informally known as "Commissioners") headed by a President. It includes an administrative body o ...

*ECAR—East Central Area Reliability Coordination Agreement (US) *EPCIP—

*ECPA—Electric Consumers Protection Act (US) *EDC—Electric Distribution Company (electricity) *EdF— Electricité de France *EDRP—Emergency

program *EE—

Energy efficiency Energy efficiency may refer to: * Energy efficiency (physics), the ratio between the useful output and input of an energy conversion process ** Electrical efficiency, useful power output per electrical power consumed ** Mechanical efficiency, a ra ...

*EEI—

Edison Electric Institute The Edison Electric Institute (EEI) is an association that represents all U.S. investor-owned electric companies. Its members provide electricity for 220 million Americans, operate in 50 states and the District of Columbia, and directly employ ...

**—Energy Efficiency Index for

European Union energy label EU Directive 92/75/EC established an energy consumption labelling scheme. The directive was implemented by several other directives thus most white goods, light bulb packaging and cars must have an EU Energy Label clearly displayed when offered ...

s *EERS— Energy Efficiency Resource Standards *EF—Earth Fault *EHV—

Extra high voltage High voltage electricity refers to electrical potential large enough to cause injury or damage. In certain industries, ''high voltage'' refers to voltage above a certain threshold. Equipment and conductors that carry high voltage warrant spec ...

*EIA—

Energy Information Administration The U.S. Energy Information Administration (EIA) is a principal agency of the U.S. Federal Statistical System responsible for collecting, analyzing, and disseminating energy information to promote sound policymaking, efficient markets, and publ ...

(US) **—

(international) *EIB—

European Investment Bank The European Investment Bank (EIB) is the European Union's investment bank and is owned by the EU Member States. It is one of the largest supranational lenders in the world. The EIB finances and invests both through equity and debt solutions ...

*EIM—Energy Imbalance Market (electricity) *EIPP—

Eastern Interconnection The Eastern Interconnection is one of the two major alternating-current (AC) electrical grids in the North American power transmission grid. The other major interconnection is the Western Interconnection. The three minor interconnections ...

Phasor In physics and engineering, a phasor (a portmanteau of phase vector) is a complex number representing a sinusoidal function whose amplitude (''A''), angular frequency (''ω''), and initial phase (''θ'') are time-invariant. It is related to ...

Project *EIS— Environmental Impact Statement (US) *ELCON—Electricity Consumers Resources Council *EMF— Electro magnetic field *EMP—Environmental Management Plan *EOR—

Enhanced oil recovery Enhanced oil recovery (abbreviated EOR), also called tertiary recovery, is the extraction of crude oil from an oil field that cannot be extracted otherwise. EOR can extract 30% to 60% or more of a reservoir's oil, compared to 20% to 40% using ...

*EPA—

United States Environmental Protection Agency The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it be ...

*EPAct—

Energy Policy Act of 1992 The Energy Policy Act of 1992, effective October 24, 1992, (102nd Congress H.R.776.ENR, abbreviated as EPACT92) is a United States government act. It was passed by Congress and set goals, created mandates, and amended utility laws to increase cl ...

(US) **—

Energy Policy Act of 2005 The Energy Policy Act of 2005 () is a federal law signed by President George W. Bush on August 8, 2005, at Sandia National Laboratories in Albuquerque, New Mexico. The act, described by proponents as an attempt to combat growing energy problems ...

(US) *EPRI—

Electric Power Research Institute EPRI, is an American independent, nonprofit organization that conducts research and development related to the generation, delivery, and use of electricity to help address challenges in the energy industry, including reliability, efficiency, affor ...

(US) *EPSA—Electric Power Supply Association *EQR—Electric Quarterly Report *ERA—Economic Regulatory Administration (part of

*ERCOT—

Electric Reliability Council of Texas The Electric Reliability Council of Texas, Inc. (ERCOT) is an American organization that operates Texas's electrical grid, the Texas Interconnection, which supplies power to more than 25 million Texas customers and represents 90 percent of the sta ...

, Inc, a

. (US) *ERGEG—European Regulators Group for Electricity and Gas *ERIS—Energy Resource Interconnection Service (electricity) *ERO—

Electric Reliability Organization The North American Electric Reliability Corporation (NERC) is a nonprofit corporation based in Atlanta, Georgia, and formed on March 28, 2006, as the successor to the North American Electric Reliability Council (also known as NERC). The original ...

. The US designated NERC as its ERO. *ERoEI—

Energy returned on energy invested 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 re ...

*ERRA—

Energy Regulators Regional Association The Energy Regulators Regional Association (ERRA) is a voluntary organization of independent energy regulatory bodies primarily from the Central European and Eurasian region, with Affiliates from Africa, Asia the Middle East and the USA. Purpose a ...

*ESCO—

Energy service company An energy service company (ESCO) is a company that provides a broad range of energy solutions including designs and implementation of energy savings projects, retrofitting, energy conservation, energy infrastructure outsourcing, power generation ...

*ESI—

Environmental Sustainability Index A biophysical environment is a biotic and abiotic surrounding of an organism or population, and consequently includes the factors that have an influence in their survival, development, and evolution. A biophysical environment can vary in scale f ...

*ESMAP—Energy Sector Management Assistance Programme *ESP—

Electrostatic precipitator An electrostatic precipitator (ESP) is a filterless device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit. In cont ...

*ESS—Energy Storage System, as in

grid energy storage Grid energy storage (also called large-scale energy storage) is a collection of methods used for energy storage on a large scale within an electrical power grid. Electrical energy is stored during times when electricity is plentiful and inexp ...

(electricity) *ETBE— ethyl tertiary butyl ether *ETSO—European

Transmission System Operator File:Electricity grid simple- North America.svg, 380px, Simplified diagram of AC electricity grid from generation stations to consumers rect 2 243 235 438 Power station rect 276 317 412 556 Transformer rect 412 121 781 400 Electric power transmis ...

s association *EU—

European Union The European Union (EU) is a supranational political and economic union of member states that are located primarily in Europe. The union has a total area of and an estimated total population of about 447million. The EU has often been des ...

*EUEF—European Union Energy Facility *EUEI—European Union Energy Initiative

F

*FAC—Fuel Adjustment Clause *FACTS— Flexible Alternating Current Transmission System *FASB—

Financial Accounting Standards Board The Financial Accounting Standards Board (FASB) is a private standard-setting body whose primary purpose is to establish and improve Generally Accepted Accounting Principles (GAAP) within the United States in the public's interest. The Securi ...

*FBR—

fast breeder reactor A breeder reactor is a nuclear reactor that generates more fissile material than it consumes. Breeder reactors achieve this because their neutron economy is high enough to create more fissile fuel than they use, by irradiation of a fertile mate ...

*FCITC—First Contingency Incremental Transfer Capability *FEIS—Final Environmental impact statement (US) *FELCC—Firm Energy Load Carrying Capability *FERC—

Federal Energy Regulatory Commission The Federal Energy Regulatory Commission (FERC) is the United States federal agency that regulates the transmission and wholesale sale of electricity and natural gas in interstate commerce and regulates the transportation of oil by pipeline in ...

(U.S.) *FGD—

Flue-gas desulfurization Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide () from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes such as waste incineration. Methods ...

*FINESSE—Financing Energy Services for Small Scale Users *Fishway—

Fish ladder A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movemen ...

*FLPMA—

Federal Land Policy and Management Act The Federal Land Policy and Management Act (FLPMA) is a United States federal law that governs the way in which the public lands administered by the Bureau of Land Management are managed. The law was enacted in 1976 by the 94th Congress and is ...

(US) *FME—

Free market economics Free may refer to: Concept * Freedom, having the ability to do something, without having to obey anyone/anything * Freethought, a position that beliefs should be formed only on the basis of logic, reason, and empiricism * Emancipate, to procure ...

*FONSI—Finding of no significant impact. See Environmental impact statement (US) *FPA—

Federal Power Act The Federal Power Act is a law appearing in Chapter 12 of Title 16 of the United States Code, entitled "Federal Regulation and Development of Power". Enacted as the Federal Water Power Act on June 10, 1920, and amended many times since, its origina ...

(US) *FPC—

Federal Power Commission The Federal Power Commission (FPC) was an independent commission of the United States government, originally organized on June 23, 1930, with five members nominated by the president and confirmed by the Senate. The FPC was originally created in 1 ...

(US) *FPS—Firm peaking service. See

Peaking power plant Peaking power plants, also known as peaker plants, and occasionally just "peakers", are power plants that generally run only when there is a high demand, known as peak demand, for electricity. Because they supply power only occasionally, the power ...

*FRCC—

Florida Reliability Coordinating Council The Florida Reliability Coordinating Council (FRCC) was (until 2019) one of the Regional Entities (REs) that were delegated authority to ensure reliability by North American Electric Reliability Corporation (NERC) in North America and was formed ...

(US) *FRS—Financial Reporting System *FT—Firm Transportation Service *FTC—

Federal Trade Commission The Federal Trade Commission (FTC) is an independent agency of the United States government whose principal mission is the enforcement of civil (non-criminal) antitrust law and the promotion of consumer protection. The FTC shares jurisdiction ov ...

(US) *FTR—Firm Transmission Rights **—Financial Transmission Rights. See explanation in

electricity markets Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described ...

. *FTS—Firm transportation service *FUA—The Fuel Use Act (US) *FUCO—Foreign Utility Company *FWPA—

Federal Water Power Act The Federal Power Act is a law appearing in Chapter 12 of Title 16 of the United States Code, entitled "Federal Regulation and Development of Power". Enacted as the Federal Water Power Act on June 10, 1920, and amended many times since, its origin ...

(US)

G

*G&T—

Generation A generation refers to all of the people born and living at about the same time, regarded collectively. It can also be described as, "the average period, generally considered to be about 20–⁠30 years, during which children are born and gr ...

and

transmission Transmission may refer to: Medicine, science and technology * Power transmission ** Electric power transmission ** Propulsion transmission, technology allowing controlled application of power *** Automatic transmission *** Manual transmission *** ...

utility cooperative A utility cooperative is a type of cooperative that is tasked with the delivery of a public utility such as electricity, water or telecommunications to its members. Profit (accounting), Profits are either reinvested for infrastructure or distrib ...

(electricity) *GADS—

Generating Availability Data System The Generating Availability Data System (GADS) is a database produced by the North American Electric Reliability Corporation (NERC). It includes annual summary reports comprising the statistics for power stations in the United States and Canada. G ...

(electricity) *GAL—

gallon The gallon is a unit of volume in imperial units and United States customary units. Three different versions are in current use: *the imperial gallon (imp gal), defined as , which is or was used in the United Kingdom, Ireland, Canada, Austral ...

(measurement) *GAO—

Government Accountability Office The U.S. Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluative, and investigative services for the United States Congress. It is the supreme audit institution of the federal govern ...

(General Accounting Office) (US) (government) *GATT—

General Agreement on Tariffs and Trade The General Agreement on Tariffs and Trade (GATT) is a legal agreement between many countries, whose overall purpose was to promote international trade by reducing or eliminating trade barriers such as tariffs or quotas. According to its pre ...

(government) *GDP—

gross domestic product Gross domestic product (GDP) is a money, monetary Measurement in economics, measure of the market value of all the final goods and services produced and sold (not resold) in a specific time period by countries. Due to its complex and subjec ...

(economics) *GEF—

Global Environmental Facility The Global Environment Facility (GEF) is a multilateral environmental fund that provides grants and blended finance for projects related to biodiversity, climate change, international waters, land degradation, persistent organic pollutants (POPs ...

(environment) *Genco—Any company doing electricity

generation A generation refers to all of the people born and living at about the same time, regarded collectively. It can also be described as, "the average period, generally considered to be about 20–⁠30 years, during which children are born and gr ...

(US) (electricity) *GFN— Global Footprint Network *GFSE—Global Forum on Sustainable Energy (organization) *GIC—Gross Inland (energy) Consumption (EU) (energy) *GHG—

Greenhouse gas A greenhouse gas (GHG or GhG) is a gas that Absorption (electromagnetic radiation), absorbs and Emission (electromagnetic radiation), emits radiant energy within the thermal infrared range, causing the greenhouse effect. The primary greenhouse ...

(climate) *GIA—Generator Interconnection Agreement (electricity) *GIC—Gas Inventory Charge (natural gas) *GISB—Gas Industry Standards Board (now NAESB) (US) (natural gas) *GLDF—Generator to Load Distribution Factor. See Load balancing (electricity) *Gm³—Billion

cubic metre The cubic metre (in Commonwealth English and international spelling as used by the International Bureau of Weights and Measures) or cubic meter (in American English) is the unit of volume in the International System of Units (SI). Its symbol is m ...

s (measurement – gas) *GMO—

Genetically modified organism A genetically modified organism (GMO) is any organism whose genetic material has been altered using genetic engineering techniques. The exact definition of a genetically modified organism and what constitutes genetic engineering varies, with ...

*GMP—

Green Mountain Power Green is the color between cyan and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570 nm. In subtractive color systems, used in painting and color printing, it is created by a combin ...

(US) (electricity) *GNP—

gross national product The gross national income (GNI), previously known as gross national product (GNP), is the total domestic and foreign output claimed by residents of a country, consisting of gross domestic product (GDP), plus factor incomes earned by foreign ...

(economics) *GNSED—Global Network for Sustainable Energy Development *GRI— Gas Research Institute (US) (natural gas) *GRC—General rate case (US) (regulatory) *GridCo—Any company running a transmission

grid (electricity) An electrical grid is an interconnected network for electricity delivery from producers to consumers. Electrical grids vary in size and can cover whole countries or continents. It consists of:Kaplan, S. M. (2009). Smart Grid. Electrical Power ...

. Also known as a TransCo (US) (electricity) *GSF—Generator to Load Distribution Factor. See Load balancing (electricity) *GPE—

gravitational potential energy Gravitational energy or gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity. It is the potential energy associated with the gravitational field, which is released (conv ...

*GSR—Gas Supply Realignment (natural gas) *Gt—

Gigaton ''Gigaton'' is the eleventh studio album by American rock band Pearl Jam, released March 27, 2020. It was preceded by the singles "Dance of the Clairvoyants", "Superblood Wolfmoon" and "Quick Escape". It is the band's first studio album in six ...

(1 billion tons) (measurement) *GTCC— Gas Turbine Combined Cycle (electricity) *GTI—

Gas Technology Institute The Gas Technology Institute is an American non-profit research and development organization which develops, demonstrates, and licenses new energy technologies for private and public clients, with a particular focus on the natural gas industry. GT ...

(US) *Gtoe—One billion tons of oil equivalent(EU) (measurement- oil) *GVEP— Global Village Energy Partnership (organization) *GVW—

gross vehicle weight Vehicle weight is a measurement of wheeled motor vehicles; either an actual measured weight of the vehicle under defined conditions or a gross weight rating for its weight carrying capacity. Curb or kerb weight Curb weight (U.S. English) or kerb ...

(transportation) *GW—

Gigawatt The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wat ...

(one billion watts) (measurement- elect) *GWE—

of electric energy (measurement- elect) *GWh—

hour (one billion watt hours) (measurement- elect) *GWP—

global warming potential Global warming potential (GWP) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (). GWP is 1 for . For other gases it depends on the gas and the time f ...

(climate)

H

*HCA—Host Control Area (electricity) *HDD—

Heating degree day Heating degree day (HDD) is a measurement designed to quantify the demand for energy needed to heat a building. HDD is derived from measurements of outside air temperature. The heating requirements for a given Architectural structure, building at ...

s a qualitative index used to reflect the demand for energy to heat a business (conservation) *HERS— Home energy rating standard (conservation) *HHI— Herfindahl–Hirschman Index (markets) *HID—

high intensity discharge High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tub ...

(electricity) *hp—

Horsepower Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...

(measurement) *HRSG—Heat recovery steam generation *HTGR—

high temperature gas cooled reactor A high-temperature gas-cooled reactor (HTGR), is a nuclear reactor that uses a graphite moderator with a once-through uranium fuel cycle. The HTGR is a type of high-temperature reactor (HTR) that can conceptually have an outlet temperature of ...

(nuclear) *

HVAC Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. HV ...

—

Heating A central heating system provides warmth to a number of spaces within a building from one main source of heat. It is a component of heating, ventilation, and air conditioning (short: HVAC) systems, which can both cool and warm interior spaces. ...

ventilation Ventilation may refer to: * Ventilation (physiology), the movement of air between the environment and the lungs via inhalation and exhalation ** Mechanical ventilation, in medicine, using artificial methods to assist breathing *** Ventilator, a m ...

, and

air conditioning Air conditioning, often abbreviated as A/C or AC, is the process of removing heat from an enclosed space to achieve a more comfortable interior environment (sometimes referred to as 'comfort cooling') and in some cases also strictly controlling ...

(conservation) **—

High voltage High voltage electricity refers to electrical potential large enough to cause injury or damage. In certain industries, ''high voltage'' refers to voltage above a certain threshold. Equipment and conductors that carry high voltage warrant spec ...

alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in whic ...

(electricity) *HVAR—Highly Valued Aquatic Resource *HVDC—

High Voltage Direct Current A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating curre ...

I

*I/C—Interruptible /Curtailable (electricity) *ICAP—

Installed Capacity Nameplate capacity, also known as the rated capacity, nominal capacity, installed capacity, or maximum effect, is the intended full-load sustained output of a facility such as a power station,

(electricity) *ICAP-SCR—Installed capacity special case resources (electricity) *ICCP— Inter-Control Center Communications Protocol (electricity) *ICE—

Internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combus ...

(transportation) *ICT—Independent Coordinator of Transmission (US) (electricity) **—

Information and Communication Technology Information and communications technology (ICT) is an extensional term for information technology (IT) that stresses the role of unified communications and the integration of telecommunications (telephone lines and wireless signals) and computers, ...

*IDC—

Interchange Distribution Calculator Interchange may refer to: Transport * Interchange (road), a collection of ramps, exits, and entrances between two or more highways * Interchange (freight rail), the transfer of freight cars between railroad companies * Interchange station, a rai ...

(electricity) *IEA—

International Energy Agency The International Energy Agency (IEA) is a Paris-based autonomous intergovernmental organisation, established in 1974, that provides policy recommendations, analysis and data on the entire global energy sector, with a recent focus on curbing carb ...

(Paris) *IEM— Internal electricity market (electricity) *IEEE—

Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...

*IEPE—

Institute of Energy Policy and Economics An institute is an organisational body created for a certain purpose. They are often research organisations (research institutes) created to do research on specific topics, or can also be a professional body. In some countries, institutes can ...

(France) *IER—Incremental Energy Rate *IET—International

emission trading Emissions trading is a market-based approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. The concept is also known as cap and trade (CAT) or emissions trading scheme (ETS). Carbon emission t ...

(policy) *IGCC—Integrated

coal gasification Coal gasification is the process of producing syngas—a mixture consisting primarily of carbon monoxide (CO), hydrogen (H2), carbon dioxide (CO2), methane (CH4), and water vapour (H2O)—from coal and water, air and/or oxygen. Historically, coal ...

combined cycle *IGIC—Interim gas inventory charge (natural gas) *IGSC—Interim gas supply charge (natural gas) *IGT—

Institute of Gas Technology The Gas Technology Institute is an American non-profit research and development organization which develops, demonstrates, and licenses new energy technologies for private and public clients, with a particular focus on the natural gas industry. G ...

(natural gas) *IGU— International Gas Union (natural gas) *IHR—Incremental Heat Rate- plant monitoring (electricity) *IIASA—International Institute for Applied System Analysis *IJC—

International Joint Commission The International Joint Commission (french: Commission mixte internationale) is a bi-national organization established by the governments of the United States and Canada under the Boundary Waters Treaty of 1909. Its responsibilities were expa ...

*ILP—Integrated Licensing Process *INGAA— Interstate Natural Gas Association of America *IOS—Interconnected Operations Services (electricity) *IOU— Investor owned utility (electricity) *IPAA—

Independent Petroleum Association of America The Independent Petroleum Association of America (IPAA) is a lobbying group for oil and gas producers in the United States. Overview It was founded on June 10, 1929, by President Herbert Hoover. It is headquartered in Washington, D.C. In 2019, ''P ...

(oil) *IPCC—

Intergovernmental Panel on Climate Change The Intergovernmental Panel on Climate Change (IPCC) is an intergovernmental body of the United Nations. Its job is to advance scientific knowledge about climate change caused by human activities. The World Meteorological Organization (WMO) a ...

(climate) *IPP— Independent Power Producer (electricity) *IPS/UPS— Integrated Power System/United Power System, consisting of Independent Power Systems of 12 countries bordering Russia and the Unified Power System of Russia *IRC—ISO / RTO Council (electricity) *IROL—

Interconnection Reliability Operating Limit In telecommunications, interconnection is the physical linking of a carrier's network with equipment or facilities not belonging to that network. The term may refer to a connection between a carrier's facilities and the equipment belonging to ...

(electricity) *IRP— Integrated Resource Planning *IRR—

Internal Rate of Return Internal rate of return (IRR) is a method of calculating an investment’s rate of return. The term ''internal'' refers to the fact that the calculation excludes external factors, such as the risk-free rate, inflation, the cost of capital, or fin ...

(finance) *ISO—

Independent System Operator A regional transmission organization (RTO) in the United States is an electric power transmission system operator (TSO) that coordinates, controls, and monitors a multi-state electric grid. The transfer of electricity between states is considered i ...

(US) (see also TSO) Responsible for grid management, but does not own assets. (electricity) *ISO-NE— Independent System Operator of New England, a

. (US) (electricity) *ISO— NE ISO New England, Inc. (electricity) *ISS— Interruptible Sales Service *IT— Interruptible Transportation is gas shipment via pipeline whose delivery may be interrupted in favor of "firm shipment" contracts if there is lack of capacity. (natural gas) *ITC—

Investment tax credit A tax credit is a tax incentive which allows certain taxpayers to subtract the amount of the credit they have accrued from the total they owe the state. It may also be a credit granted in recognition of taxes already paid or a form of state "disc ...

(policy) *ITS—" Interruptible Transportation Service" is gas shipment via pipeline whose delivery may be interrupted in favor of "firm shipment" contracts if there is lack of capacity. (natural gas)

J

*JRC—

Joint Research Centre The Joint Research Centre (JRC) is the European Commission's science and knowledge service which employs scientists to carry out research in order to provide independent scientific advice and support to European Union (EU) policy. The JRC is ...

*JREC—

Johannesburg Renewable Energy Coalition The Johannesburg Renewable Energy Coalition, also known as JREC, is the group of countries supporting the Declaration on The Way Forward on Renewable Energy (also known as the JREC Declaration), made at the World Summit on Sustainable Development in ...

K

*koe—One

kilogram oil equivalent The tonne of oil equivalent (toe) is a unit of energy defined as the amount of energy released by burning one tonne of crude oil. It is approximately 42 gigajoules or 11.630 megawatt-hours, although as different crude oils have different calorifi ...

(EU) (measurement) *kV—

Kilovolt The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Defini ...

(one thousand volts) (measurement) *kVA— One thousand volt Ampere (measurement) *kvar—one thousand

var Var or VAR may refer to: Places * Var (department), a department of France * Var (river), France * Vār, Iran, village in West Azerbaijan Province, Iran * Var, Iran (disambiguation), other places in Iran * Vár, a village in Obreja commune, Ca ...

s (measurement) *kW—

Kilowatt The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wa ...

(one thousand watts) (measurement) *kWE— kilowatt electric (measurement) *kWh—

Kilowatt hour A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common bil ...

(one thousand watt hours) (measurement)

L

*LaaR—

Load acting as a resource (ERCOT category) Load or LOAD may refer to: Aeronautics and transportation *Load factor (aeronautics), the ratio of the lift of an aircraft to its weight *Passenger load factor, the ratio of revenue passenger miles to available seat miles of a particular transpo ...

(electricity) *LBA—Local Balancing Authority (electricity) *LBNL—

Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory (LBNL), commonly referred to as the Berkeley Lab, is a United States Department of Energy National Labs, United States national laboratory that is owned by, and conducts scientific research on behalf of, t ...

(US) *LCOD— Levelized cost of delivery (electricity) *LCOE—

Levelized cost of energy The levelized cost of electricity (LCOE), or levelized cost of energy, is a measure of the average net present cost of electricity generation for a generator over its lifetime. It is used for investment planning and to compare different methods ...

(electricity) *LCOS—

Levelized cost of storage Different methods of electricity generation can incur a variety of different costs, which can be divided into three general categories: 1) wholesale costs, or all costs paid by utilities associated with acquiring and distributing electricity to ...

(electricity) *LDC—

Local distribution company A distribution network operator (DNO), also known as a distribution system operator (DSO), is the operator of the electric power distribution system which delivers electricity to most end users. Each country may have many local distribution networ ...

(electricity) *LED—

Light Emitting Diode A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (cor ...

*LEVP— Low Emissions Vehicle Program *LHV—

lower heating value The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. The ''calorific value'' is the total energy relea ...

*Li-Ion—Lithium Ion (electricity storage) *LIHEAP—

Low Income Home Energy Assistance Program The Low Income Home Energy Assistance Program (LIHEAP, pronounced "lie" "heap") is a United States federal social services program first established in 1981 and funded annually through Congressional appropriations. The mission of LIHEAP is to as ...

*LIPA—

Long Island Power Authority Long Island Power Authority (LIPA, "lie-pah") is a municipal subdivision of the State of New York that owns the electric transmission and electric distribution system serving all of Long Island and a portion of New York City known as the Rocka ...

(US) (electricity) *LLF— Load-loss factor (electricity) *LMP—Locational marginal price/pricing. See explanation in

. *LMR—Load Modifying Resource (electricity) *LNG—

Liquified Natural Gas Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volu ...

*LODF— Line Outage Distribution Factor (electricity) *LOLE—

Loss of load expectation Loss of load in an electrical grid is a term used to describe the situation when the available generation capacity is less than the system load. Multiple probabilistic reliability indices for the generation systems are using loss of load in thei ...

(electricity) *LOLP— Loss of load probability (electricity) *LPG—

liquefied petroleum gas Liquefied petroleum gas (LPG or LP gas) is a fuel gas which contains a flammable mixture of hydrocarbon gases, specifically propane, propylene, butylene, isobutane and n-butane. LPG is used as a fuel gas in heating appliances, cooking e ...

*LPN— Lender Participation Notes *LRG— liquefied refinery gases *LSE—

Load serving entity Load serving entity (LSE) in a deregulated electricity market is a company or government agency that is obligated by law or via a long-term contract to provide electrical power to end-users. The term is used in regulation, yet is vague and thus sub ...

*LSF— Load Shift Factor *lsfo—

Low sulfur fuel oil Fuel oil is any of various fractions obtained from the distillation of petroleum (crude oil). Such oils include distillates (the lighter fractions) and residues (the heavier fractions). Fuel oils include heavy fuel oil, marine fuel oil (MFO), bun ...

*LWR—

light water reactor The light-water reactor (LWR) is a type of thermal-neutron reactor that uses normal water, as opposed to heavy water, as both its coolant and neutron moderator; furthermore a solid form of fissile elements is used as fuel. Thermal-neutron reacto ...

M

*MAAC— Mid Atlantic Area Council (US- geographically within PJM) *MADRI— Mid Atlantic Distributed Resources Initiative (US) *MAIN— Mid America Interconnected Network (US) *MAOP—

Maximum allowable operating pressure Maximum Allowable Operating Pressure or MAOP is a pressure limit set, usually by a government body, which applies to compressed gas pressure vessels, pipelines, and storage tanks. For pipelines, this value is derived from Barlow's Formula, which ...

*MAPP— Mid Continent Area Power Pool (US) *MBD— million barrels per day *MBOE—One million

barrels of oil equivalent The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (, or ) of crude oil. The BOE is used by oil and gas companies in their financial statements as a way of combining oil and natur ...

(EU) *MBR— Market based Rates *MBS— Macro economic Budget Support *Mcf—

Roman numeral Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers are written with combinations of letters from the Latin alphabet, eac ...

"M" for one thousand

(measurement of natural gas) *MDAS— Meter Data Acquisition System *MDD—

Maximum Daily Delivery Obligations In mathematical analysis, the maxima and minima (the respective plurals of maximum and minimum) of a function, known collectively as extrema (the plural of extremum), are the largest and smallest value of the function, either within a given ran ...

*MDDQ— Maximum Daily Delivery Quantity *MDM— Meter Data Management *MDQ— Maximum Daily Quantities *MECS—

Manufacturing Energy Consumption Survey Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of secondary sector of the economy. The term may refer to a ...

*MEDREG—

Mediterranean Energy Regulators The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western Europe, Western and Southern Europe and Anatolia, on the south by North Africa ...

*MEDREP—

Mediterranean Renewables Energy Partnership The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...

*MER— Maximum efficient rate *MERC—

Mobile Emission Reduction Credit (MERC) A mobile emission reduction credit (MERC) is an emission reduction credit generated within the transportation sector. The term “mobile sources” refers to motor vehicles, engines, and equipment that move, or can be moved, from place to place. M ...

(US) *MFV— Modified fixed variable rate *MISO—

Midcontinent Independent System Operator The Midcontinent Independent System Operator, Inc., formerly named Midwest Independent Transmission System Operator, Inc. (MISO) is an Independent System Operator (ISO) and Regional Transmission Organization (RTO) providing open-access transmissi ...

, Inc. A

. (US) *MLP— Maximum lawful price *MLRA— Major Land Resource Areas *MM—Used to denote million in gas usage *MMbbl/d—one million barrels of oil per day *MMBtu—1 million

s, same as dekatherm *MMC— Market Monitoring Center *MMCF—one million

(measurement of natural gas) *MMCFD—one million

per day *MMGAL—one million

gallons The gallon is a unit of volume in imperial units and United States customary units. Three different versions are in current use: *the imperial gallon (imp gal), defined as , which is or was used in the United Kingdom, Ireland, Canada, Austral ...

*MMGAL/D—one million gallons per day *MMS—

Minerals Management Service The Minerals Management Service (MMS) was an agency of the United States Department of the Interior that managed the nation's natural gas, oil and other mineral resources on the outer continental shelf (OCS). Due to perceived conflict of intere ...

(US) *MMST—one million

short ton The short ton (symbol tn) is a measurement unit equal to . It is commonly used in the United States, where it is known simply as a ton, although the term is ambiguous, the single word being variously used for short, long, and metric ton. The vari ...

s *MODFLOW— model of groundwater flow *MOU— Memorandum of Understanding *MOX—

mixed oxide fuel Mixed oxide fuel, commonly referred to as MOX fuel, is nuclear fuel that contains more than one oxide of fissile material, usually consisting of plutonium blended with natural uranium, reprocessed uranium, or depleted uranium. MOX fuel is an alt ...

(nuclear) *MPAN -

Meter Point Administration Number A Meter Point Administration Number, also known as MPAN, Supply Number or S-Number, is a 21-digit reference used in Great Britain to uniquely identify electricity supply points such as individual domestic residences. The system was introduced in ...

*MPG—

Miles per gallon The fuel economy of an Car, automobile relates distance traveled by a vehicle and the amount of fuel consumption, fuel consumed. Consumption can be expressed in terms of volume of fuel to travel a distance, or the distance traveled per unit volu ...

*MRO—

Midwest Reliability Organization The Midwest Reliability Organization (MRO) began operations on January 1, 2005, as the successor to the Mid-continent Area Power Pool (MAPP), which was formed in 1965. MRO is one of six regional entities under North American Electric Reliability ...

(US) *MSA—

metropolitan statistical area In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally Incorporated town, incorporate ...

*MSHA—

Mine Safety and Health Administration The Mine Safety and Health Administration (MSHA) () is a large agency of the United States Department of Labor which administers the provisions of the Federal Mine Safety and Health Act of 1977 (Mine Act) to enforce compliance with mandatory safet ...

(US) *msl—

Mean sea level There are several kinds of mean in mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. ...

*MSW—

Municipal solid waste Municipal solid waste (MSW), commonly known as trash or garbage in the United States and rubbish in Britain, is a waste type consisting of everyday items that are discarded by the public. "Garbage" can also refer specifically to food waste, ...

*Mt—one million

ton Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses. Mainly it describes units of weight. Confusion can arise because ''ton'' can mean * the long ton, which is 2,240 pounds ...

s (ambiguous as to whether short tons or metric tons) **—one

Metric ton The tonne ( or ; symbol: t) is a unit of mass equal to 1000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton to distinguish it from the non-metric units of the short ton (United States c ...

*MTBE—

methyl tertiary butyl ether Methyl ''tertiary''-butyl ether (MTBE), also known as methyl tert-butyl ether and ''tert''-butyl methyl ether, is an organic compound with a structural formula (CH3)3COCH3. MTBE is a volatile, flammable, and colorless liquid that is sparingly sol ...

*MTEF— Medium Term Expenditure Framework *MTEP— Midwest ISO Transmission Expansion Plan 2005 (US) *Mtoe—One million tons of oil equivalent(EU) *Muni—

Municipality A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality'' may also mean the go ...

*MVA—Mega volt amperes (one million volt amperes) *MW—

Megawatt The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units, International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), ...

(one million watts) *MWE— megawatt electric *MWh—

Megawatt hour A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common bil ...

(one million watt hours)

N

*NAAQS—

National Ambient Air Quality Standards The U.S. National Ambient Air Quality Standards (NAAQS, pronounced ) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency ...

(US) *NAESB—

North American Energy Standards Board (formerly GISB) North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

*NAFTA—

North American Free Trade Agreement The North American Free Trade Agreement (NAFTA ; es, Tratado de Libre Comercio de América del Norte, TLCAN; french: Accord de libre-échange nord-américain, ALÉNA) was an agreement signed by Canada, Mexico, and the United States that crea ...

*NAICS—

North American Industry Classification System The North American Industry Classification System or NAICS () is a classification of business establishments by type of economic activity (process of production). It is used by government and business in Canada, Mexico, and the United States of A ...

*NAP— National Renewable Energy Action Plan *NARUC—National Association of Regulatory Utility Commissioners (US

*NAS—

United States National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...

*NASPI—North American

Synchrophasor A phasor measurement unit (PMU) is a device used to estimate the magnitude and phase angle of an electrical phasor quantity (such as voltage or current) in the electricity grid using a common time source for synchronization. Time synchronization i ...

Initiative *NASUCA—

National Association of Utility Consumer Advocates National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, c ...

(US) *NATC—Non Recallable Available Transfer Capability *NBS—

National Bureau of Standards The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical sci ...

(US) *NCD— Non coincidental Demand *NCEP—National Council on Electricity Policy (US

*NCSL—

National Conference of State Legislatures The National Conference of State Legislatures (NCSL), established in 1975, is a "nonpartisan public officials’ association composed of sitting state legislators" from the states, territories and commonwealths of the United States. Background ...

(US) *NEA—The

National Energy Act The National Energy Act of 1978 (NEA78) was a legislative response by the U.S. Congress to the 1973 energy crisis. It includes the following statutes: * Public Utility Regulatory Policies Act (PURPA) () * Energy Tax Act () * National Energy Cons ...

of 1978 (US) *NEB—

National Energy Board The National Energy Board was an independent economic regulatory agency created in 1959 by the Government of Canada to oversee "international and inter-provincial aspects of the oil, gas and electric utility industries". Its head office was located ...

(Canada) *NEDRI— New England Distributed Resources Initiative (US) *NEM—

Net energy metering Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly importa ...

(US) *NEPA—

National Environmental Policy Act The National Environmental Policy Act (NEPA) is a United States environmental law that promotes the enhancement of the environment and established the President's Council on Environmental Quality (CEQ). The law was enacted on January 1, 1970.Un ...

(US) *NEPOOL—New England Power Pool *NERC—

North American Electric Reliability Council The North American Electric Reliability Corporation (NERC) is a nonprofit corporation based in Atlanta, Georgia, and formed on March 28, 2006, as the successor to the North American Electric Reliability Council (also known as NERC). The original ...

*NGA—

Natural Gas Act The Natural Gas Act of 1938 was the first occurrence of the United States federal government regulating the natural gas industry. It was focused on regulating the rates charged by interstate natural gas transmission companies. In the years prior t ...

(US) *NGAA—

Natural Gasoline Association of America Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are ...

(US) *NGL—

natural gas Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbo ...

liquids *NGPA—Natural Gas Policy Act of 1978 (US) *NGPL—

Natural gas Natural gas (also called fossil gas or simply gas) is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. Low levels of trace gases like carbo ...

plant liquids *NGPSA—

Natural Gas Pipeline Safety Act of 1968 Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are ...

(US) *NGSA— Natural Gas Supply Association (US) *NGV—

Natural gas vehicle A natural gas vehicle (NGV) is an alternative fuel vehicle An alternative fuel vehicle is a motor vehicle that runs on alternative fuel rather than traditional petroleum fuels (petrol or diesel fuel, petrodiesel). The term also refers to an ...

*NHPA—

National Historic Preservation Act The National Historic Preservation Act (NHPA; Public Law 89-665; 54 U.S.C. 300101 ''et seq.'') is legislation intended to preserve historic and archaeological sites in the United States of America. The act created the National Register of Historic ...

(US) *NIETC— National Interest Electric Transmission Corridor (US) *NITC—

Normal Incremental Transfer Capability Normal(s) or The Normal(s) may refer to: Film and television * Normal (2003 film), ''Normal'' (2003 film), starring Jessica Lange and Tom Wilkinson * Normal (2007 film), ''Normal'' (2007 film), starring Carrie-Anne Moss, Kevin Zegers, Callum Keit ...

*NIMBY— Not in my backyard regarding siting of energy generation and transmission infrastructure. *NOAA—

National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...

(US) *NOC—

National Oil Company A national oil company (NOC) is an oil and gas company fully or in the majority-owned by a national government. According to the World Bank, NOCs accounted for 75% global oil production and controlled 90% of proven oil reserves in 2010. Due to thei ...

*NOI— Notice of Intent or Notice of Inquiry or Notice of Investigation *NOPR—

Notice of Proposed Rulemaking A Notice of Proposed Rulemaking (NPRM) is a public notice that is issued by law when an independent agency of the US government wishes to add, remove, or change a rule or regulation as part of the rulemaking process. The notice is an important ...

(US) *NORDEL—association of Nordic electric system operators, comprising Denmark, Finland, Norway, Sweden *NOx—

nitrogen oxides Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds: Charge-neutral *Nitric oxide (NO), nitrogen(II) oxide, or nitrogen monoxide *Nitrogen dioxide (), nitrogen(IV) oxide *Nitrogen trioxide (), or ni ...

*NPCC—

Northeast Power Coordinating Council The Northeast Power Coordinating Council (NPCC) was formed January 19, 1966, as a successor to the Canada–United States Eastern Interconnection (CANUSE). It was formed in order to improve reliability of electric service. NPCC is one of six reg ...

(US) *NPV—

Net Present Value The net present value (NPV) or net present worth (NPW) applies to a series of cash flows occurring at different times. The present value of a cash flow depends on the interval of time between now and the cash flow. It also depends on the discount ...

*NRC—

Nuclear Regulatory Commission The Nuclear Regulatory Commission (NRC) is an independent agency of the United States government tasked with protecting public health and safety related to nuclear energy. Established by the Energy Reorganization Act of 1974, the NRC began operat ...

(US) *NRCS—

National Resource Conservation Service Natural Resources Conservation Service (NRCS), formerly known as the Soil Conservation Service (SCS), is an agency of the United States Department of Agriculture (USDA) that provides technical assistance to farmers and other private landowners and ...

(US) *NRECA—

National Association of Rural Electric Cooperatives National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, ce ...

(US) *NREL—

National Renewable Energy Laboratory The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation. NREL is a federally funded research and d ...

(US) *NREPA—

National Resource and Environmental Protection Act National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, c ...

(US) *NRI— National Rivers Inventory (US) *NRIS—Network Resource Interconnection Service (electricity) *NSA— Noise sensitive area *NTAC—

Northwest Transmission Assessment Committee The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...

(US) *NUG— Non Utility Generator *NURE— national uranium resource evaluation (US) *NYDER— New York Department of Environmental Resources *NYISO—

New York Independent System Operator New York energy law is the statutory, regulatory, and common law of the state of New York concerning the policy, conservation, taxation, and utilities involved in energy. Secondary sources have also influenced the law of energy in the Empire S ...

, Inc. (US) *NYMEX—

New York Mercantile Exchange The New York Mercantile Exchange (NYMEX) is a commodity futures exchange owned and operated by CME Group of Chicago. NYMEX is located at One North End Avenue in Brookfield Place in the Battery Park City section of Manhattan, New York City. ...

*NYPSC—

New York Public Service Commission The New York Public Service Commission is the public utilities commission of the New York state government that regulates and oversees the electric, gas, water, and telecommunication industries in New York as part of the Department of Public Ser ...

*NYSERDA— New York State Energy Research and Development Authority

O

*O&M—Operation and Maintenance Expenses *O₃—

Ozone Ozone (), or trioxygen, is an inorganic molecule with the chemical formula . It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope , breaking down in the lo ...

*OASIS—

Open Access Same-Time Information System The Open Access Same-Time Information System (OASIS), is an Internet-based system for obtaining services related to electric power transmission in North America. It is the primary means by which high-voltage transmission lines are reserved for mov ...

*OATI- Open Access Technology International (US energy software company) *OATT— Open Access Transmission Tariff (US) *OCS—

Outer Continental Shelf The Outer Continental Shelf (OCS) is a feature of the geography of the United States. The OCS is the part of the internationally recognized continental shelf of the United States which does not fall under the jurisdictions of the individual U. ...

(oil and wind resources) *OCSLA—

Outer Continental Shelf Lands Act {{Short pages monitor

Appendix: Residential energy acronyms

The following table lists a number of terms that are used in the United States for residential energy audits. *AFUE—

annual fuel utilization efficiency The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers. The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, pea ...

*BTL—building tightness limit (building tightness) *CDH—cooling degree hours (climate) *CFL—compact fluorescent light *COP—

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. Higher COPs equate to higher efficiency, lower energy ( ...

*CRI—color rendering index *EEM—Energy Efficient Mortgage *EER—energy efficiency ratio *EF—energy factor (clothes washers) *EIM—Energy Improvement Mortgage *ERV— energy-recovery ventilator *HDD—heating degree day *HHI—home heating index *HID—high-intensity discharge *HRV—heat-recovery ventilator *HSPF—heating seasonal performance factor *HVI—Home Ventilating Institute *IECC—International Energy Conservation Code *K-value—thermal conductance *Low-e—low emissivity *LEED—

Leadership in Energy and Environmental Design Leadership in Energy and Environmental Design (LEED) is a green building certification program used worldwide. Developed by the non-profit U.S. Green Building Council (USGBC), it includes a set of rating systems for the design, construction ...

, standard for Green Building design *MEF—modified energy factor (clothes washers) *MINHERS—Mortgage Industry National Home Energy Rating Systems Standards *MVG—minimum ventilation guideline (building tightness) *MVL—minimum ventilation level (building tightness) *NAECA—

National Appliance Energy Conservation Act The National Appliance Energy Conservation Act of 1987 (NAECA; ) is a United States Act of Congress that regulates energy consumption of specific household appliances. Though minimum Energy Efficiency Standards were first established by the Unite ...

*ODS—oxygen depletion sensor *RESNET—Residential energy services network *R-value—thermal resistance *SC—shading coefficient (windows) *SEER—seasonal E efficiency ratio *SHGC—solar heat gain coefficient *SIR—savings-to-investment ratio (energy conservation investments) *SLA—Specific leakage area *SPB—Simple Payback (energy conservation investments) *SSE—steady-state efficiency *U-value—thermal transmittance (also called U-factor) *WF—water factor (clothes washers)

References

Notes

* * * * * {{DEFAULTSORT:List Of Energy Acronyms

Energy In physics, 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 a ...

Acronyms An acronym is a word or name formed from the initial components of a longer name or phrase. Acronyms are usually formed from the initial letters of words, as in ''NATO'' (''North Atlantic Treaty Organization''), but sometimes use syllables, as ...