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Adriatica Pipeline
The Adriatica Pipeline is the name used for the Ionian-Adriatic Pipeline (IAP), a proposed 511-kilometer bi-directional gas pipeline linking Split, Croatia, with Fier, Albania, via Montenegro.
Adua Oil and Gas Field
The Adua Oil and Gas Field is an operating offshore oil and gas field in Nigeria's Niger Delta, in block OML 70, discovered in 1967 and operated by Mobil Producing Nigeria.
Advanced Adiabatic Compressed Air Energy Storage
Advanced adiabatic compressed air energy storage (AA-CAES) is a grid energy storage concept that stores compression heat in a thermal store so discharge needs no fossil fuel.
Advanced boiling water reactor
Advanced boiling water reactor (ABWR) is a Generation III design by GE Nuclear Energy, rated at 3,926 MWt. Its first units operated in Japan in 1996 and 1997.
Advanced CANDU Reactor
The Advanced CANDU Reactor (ACR), developed by Atomic Energy of Canada Limited, is a Generation III+ reactor whose ACR-1000 reference version is a 1200 MWe pressure tube design.
Advanced Clean Cars II
Advanced Clean Cars II (ACC II) is a 2022 California regulation requiring a rising share of new zero-emission vehicle sales, reaching 100 percent by 2035.
Advanced Clean Energy Storage
Advanced Clean Energy Storage (ACES) is a green hydrogen facility under development in Delta, Utah, converting surplus renewable electricity into hydrogen stored in underground salt caverns.
Advanced gas-cooled reactor
The advanced gas-cooled reactor (AGR) is a British second-generation nuclear reactor developed from the Magnox design in the 1960s, using graphite moderation and carbon dioxide coolant.
Advanced Manufacturing Production Credit
The Advanced Manufacturing Production Credit is a US federal tax credit under Section 45X paying manufacturers per unit for clean energy components made in America.
Advanced metering infrastructure
Advanced metering infrastructure (AMI) is the integrated system of smart meters, two-way communication networks, and data management systems that electric utilities use to measure consumption automatically and act remotely.
Advanced Radiographic Capability
The Advanced Radiographic Capability (ARC) is a petawatt-class short-pulse laser at the National Ignition Facility in California, commissioned in 2015 to x-ray imploding fusion targets.
Advanced Rail Energy Storage
Advanced Rail Energy Storage, or ARES, is a gravity-based grid storage technology in which surplus electricity pushes rail cars uphill and their descent regenerates power for the grid.
Advanced Reactors Demonstration Program
The Advanced Reactor Demonstration Program (ARDP) is a U.S. Department of Energy program launched in May 2020 to fund advanced nuclear reactors through cost-shared partnerships with private industry.
Advanced Test Reactor
The Advanced Test Reactor (ATR) is a 250-megawatt pressurized water test reactor at Idaho National Laboratory, operating since 1967, that irradiates nuclear fuels and materials for the U.S. Navy and other users.
Advanced Toroidal Facility
The Advanced Toroidal Facility (ATF) was an experimental stellarator, a torsatron, at Oak Ridge National Laboratory and the world's largest stellarator when it began operating in 1988.
Advent Technologies
Advent Technologies is an American fuel cell and hydrogen technology company headquartered in Livermore, California, that makes high-temperature membrane electrode assemblies, complete fuel cell systems, and defense power products.
AECO (natural gas pricing hub)
AECO is the natural gas trading hub and price benchmark for Alberta, Canada, named for the Alberta Energy Company and quoted as the AECO "C" spot price.
Aegis Pipeline System
The Aegis Pipeline System is a 270-mile, 20-inch ethane pipeline owned by Enterprise Products Partners, running from Mont Belvieu, Texas to Napoleonville, Louisiana and serving Gulf Coast petrochemical plants.
Aeolian vibration
Aeolian vibration is a high-frequency, low-amplitude oscillation of overhead power line conductors caused by wind flowing across them, and the leading cause of fatigue damage at conductor clamps, countered by Stockbridge dampers.
AEP Ohio
AEP Ohio is the brand of Ohio Power Company, an American Electric Power utility headquartered in Gahanna, Ohio, serving about 1.5 million customers in central and southern Ohio.
AEP Texas
AEP Texas is the transmission and distribution utility subsidiary of American Electric Power, delivering electricity to more than one million meters across south and west Texas without selling the power itself.
Aera Energy
Aera Energy is a California oil and gas producer formed in 1997 in Bakersfield, producing about a quarter of the state's oil from San Joaquin Valley heavy-oil fields.
Ærfugl (gas field)
Ærfugl is a gas condensate field in the Norwegian Sea, discovered in 2000 as Snadd and operated by Aker BP as a subsea tie-back to the Skarv FPSO, on stream since 2020.
Aerospace Lithium (Hangtian Lithium)
Aerospace Lithium (Hangtian Lithium) is a Chinese battery manufacturer founded in 2020 in Gaoyou, Jiangsu, producing large cylindrical lithium iron phosphate cells including 38121 and 46950 formats.
Aershan Oil Field
The Aershan Oil Field (阿尔善) is an oil field in the Erlian Basin of Inner Mongolia, China, discovered in 1981 and operated by PetroChina Huabei Oilfield Company.
AES Andes
AES Andes is a Chilean power generation and transmission company, a subsidiary of AES Corporation, operating 5,371 MW across Chile, Colombia, and Argentina as of 2025.
AES Corporation
AES Corporation is a Fortune 500 power company headquartered in Arlington, Virginia, founded in 1981, operating electricity generation and utilities across the US and Latin America.
AES Indiana
AES Indiana, formerly Indianapolis Power & Light Company (IPL), is a regulated electric utility serving Indianapolis and central Indiana, renamed in 2021 as a subsidiary of The AES Corporation.
AES Ohio
AES Ohio, the trade name of The Dayton Power and Light Company, is a regulated electric utility headquartered in Dayton, Ohio, serving over 527,000 customers across 24 counties.
AFEX pretreatment
AFEX pretreatment, also called ammonia fiber expansion, is a thermochemical process treating lignocellulosic biomass with liquid ammonia under pressure, developed at Michigan State University for cellulosic ethanol production.