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Skikda LNG Terminal
The Skikda LNG Terminal, known as GL1K, is an Algerian LNG export complex at Skikda owned by Sonatrach, commissioned in 1972 as Algeria's second plant.
Skjold field
Skjold field (Danish: Skjoldfeltet) is an oil field in the Danish sector of the North Sea about 200 km west of Esbjerg, discovered in 1977 and producing since 1982 as a satellite to the Gorm field.
Skjold Oil and Gas Field
Skjold is an oil field in the Danish sector of the North Sea, discovered in 1977 and operated by TotalEnergies as a satellite of the Gorm field.
Skogul field
Skogul is a small oil field in the Norwegian North Sea, discovered in 2010 and operated by Aker BP, producing since 2020 via the Alvheim FPSO.
Sky imager
A sky imager, also called an all-sky imager, is a ground-based upward-facing fisheye camera that detects clouds to forecast solar irradiance over horizons of roughly 10 to 20 minutes.
SL-1
SL-1 (Stationary Low-Power Reactor Number 1) was a 3 MW experimental boiling water reactor for the US Army in Idaho, destroyed in 1961 by a power excursion and steam explosion.
SLB OneSubsea
SLB OneSubsea is a subsea production and processing joint venture led by SLB with Aker Solutions and Subsea7, closed in October 2023 and headquartered in Oslo and Houston.
Sleipner Field
Sleipner is a group of gas and condensate fields in the central Norwegian North Sea, operated by Equinor, hosting the world's first industrial-scale carbon storage project since 1996.
Sleipner gas field
Sleipner is a group of gas and condensate fields in the central North Sea, Norwegian blocks 15/6 and 15/9, operated by Equinor and producing since 1993.
Slickline
Slickline is a single-strand, nonelectric steel wire spooled from a surface winch that runs, retrieves, and actuates downhole tools in live oil and gas wells without a workover rig.
Slovalco
Slovalco is an aluminum smelter and casthouse in Žiar nad Hronom, Slovakia, majority-owned by Hydro. It curtailed primary production in 2022–2023 during the energy crisis and began restarting in 2026.
Slovenské Elektrárne
Slovenské Elektrárne is a Slovak electricity company, the country's largest producer, with nuclear and hydro plants owned 66% by the Czech group EPH since 2025.
Slovnaft
Slovnaft is a Slovak oil refining and petrochemicals company based in Bratislava, operating the country's only large refinery and largest filling-station chain, majority-owned by Hungary's MOL Group since 2000.
Slug catcher
A slug catcher is a vessel or pipe installation at the end of a multiphase gas pipeline that catches liquid slugs and feeds gas and liquid to processing at manageable rates.
Slush hydrogen
Slush hydrogen (SLH2) is a mixture of solid hydrogen particles in subcooled liquid hydrogen, studied as a denser rocket propellant with about 16% higher density than liquid hydrogen.
SMA Solar Technology
SMA Solar Technology is a German company founded in 1981 and headquartered in Niestetal near Kassel that develops and sells photovoltaic inverters and energy-management systems worldwide.
Small modular reactor
A small modular reactor, or SMR, is a nuclear reactor of up to 300 MWe whose modules are fabricated in a factory and shipped to site for assembly.
Small Refinery Exemption
A Small Refinery Exemption is a US EPA waiver under the Clean Air Act freeing a small refinery from Renewable Fuel Standard obligations for disproportionate economic hardship.
Small-signal stability
Small-signal stability is the ability of a power system to maintain synchronism under small disturbances like load changes, analyzed by linearizing the system around an operating point.
Smart Battery System
Smart Battery System (SBS) is a set of specifications for rechargeable battery packs that report their own state and predictions to a host, developed by Duracell and Intel in 1995.
Smart grid
The smart grid, also called grid modernization, is an electricity network upgraded with digital technology and two-way communication so utilities and customers can exchange information and manage energy use.
Smart meter
A smart meter, also called a smart energy meter, is an electronic utility meter that records electricity use in intervals and sends readings to the supplier automatically.
Smith Ranch-Highland
Smith Ranch-Highland is a uranium in situ recovery mining complex in Converse County, Wyoming, operated by Cameco Resources and the largest US uranium facility by licensed capacity.
Smoky gas field
The Smoky gas field is an operating natural gas field in the Alberta Deep Basin of western Canada, discovered in 1980 and producing mainly from the Montney and Spirit River formations.
Smolensk nuclear power plant
The Smolensk nuclear power plant is an operating nuclear power station in Smolensk Oblast, Russia, with three RBMK-1000 reactors in service between 1982 and 1990, owned by Rosatom.
Smoothing reactor
A smoothing reactor is a large inductor connected in series at the DC terminal of an HVDC converter station, smoothing current ripple and limiting fault current.
SMR-160
The SMR-160, originally named HI-SMUR, is a 160 MWe small modular pressurized water reactor with passive safety systems, designed by Holtec International and cooled entirely by natural circulation rather than pumps.
Smulders (company)
Smulders is a Belgian steel construction company headquartered in Arendonk, specializing in foundations and substations for offshore wind farms and part of France's Eiffage Group since 2013.
Snail trail
A snail trail, also called a snail track, is a dark worm-like discoloration of the silver grid fingers on silicon solar cells, usually along invisible microcracks.
Snapper gas field
The Snapper gas field is an offshore natural gas and condensate field in the Gippsland Basin under Bass Strait, discovered in 1968 and produced since 1981.