Energy technology

Otakikpo Oil and Gas Field

Otakikpo is a marginal oil and gas field in the Niger Delta's coastal swamp, Rivers State, Nigeria, producing commercially since February 2017 under Green Energy International.

Otovo

Otovo is a Norwegian-founded marketplace for residential solar, founded in Oslo in 2016, that connects homeowners with local installers for solar panels, batteries, and heat pumps.

Otumara Oil and Gas Field

Otumara Oil and Gas Field is an onshore oil and gas field in the western Niger Delta of Nigeria, part of OML 43 near Warri.

Oumache power station

Oumache power station (محطة كهرباء أوماش), also known as the Biskra Combined-Cycle Power Plant, is a natural-gas-fired power station in Biskra Province, Algeria, operated by Sonelgaz.

Our Next Energy

Our Next Energy Inc. is a Michigan battery company founded by Mujeeb Ijaz around 2020, making lithium iron phosphate batteries for rail, defense, and grid storage.

Ourhoud Oil Field

Ourhoud is a giant onshore oil field in eastern Algeria's Berkine Basin, the country's second largest after Hassi Messaoud, producing from Triassic sandstones since 2002.

Out-of-step protection

Out-of-step protection is the power system protection that detects loss of synchronism on a grid, blocking distance relays during stable swings and tripping breakers during unstable swings.

Outardes 3 hydroelectric plant

Outardes 3 is a run-of-river hydroelectric plant on the Rivière aux Outardes in the Côte-Nord region of Québec, owned and operated by Hydro-Québec, commissioned in 1969.

OVEC (Ohio Valley Electric Corporation)

The Ohio Valley Electric Corporation, OVEC, is a utility holding company organized in 1952 to supply power to Atomic Energy Commission uranium enrichment plants near Portsmouth, Ohio.

Overcurrent protection

Overcurrent protection is a power system protection method in which a relay trips a circuit breaker when current exceeds a preset pickup value, after a fixed or inverse-time delay.

Overfire air

Overfire air (OFA) is a combustion modification that diverts 5 to 20 percent of a furnace's air to ports above the burners, reducing nitrogen oxide (NOx) formation.

Overhead ground wire

An overhead ground wire, also called a shield wire, static wire, earth wire, or skywire, is a grounded conductor atop power lines that intercepts lightning strokes.

Overhead power line

An overhead power line, also known as a high tension line, carries electric power through conductors suspended above the ground on poles or towers, using air as insulation.

Overland Pass NGL Pipeline

The Overland Pass Pipeline is a natural gas liquids pipeline carrying NGLs from Opal, Wyoming, to Conway, Kansas, owned equally by Williams and ONEOK and operated by Williams.

Overtopping device

An overtopping device is a wave energy converter that stores overtopped waves in a reservoir above sea level and drains the water through low-head turbines driving generators.

Ovintiv

Ovintiv is a Denver-based oil and gas company formed in 2020 when Canada's Encana Corporation reorganized as an American company, operating in the Permian and Montney.

Ovo Energy

Ovo Energy is a British domestic gas and electricity supplier founded by Stephen Fitzpatrick in 2009 and based in Bristol, at one point serving 3.5 million customers.

Oxiacaque Oil and Gas Field

Oxiacaque is an operating onshore oil and gas field in Tabasco, Mexico, discovered in 1977 and operated by Pemex, producing medium sour crude from a fractured carbonate reservoir.

Oxide thermoelectric modules

Oxide thermoelectric modules are solid-state devices that convert heat into electricity using ceramic oxides, operating in air at high temperature where bismuth telluride modules fail.

Oxygen redox instability in Li-rich cathodes

Oxygen redox instability in Li-rich cathodes is the tendency of lithium-rich layered oxide battery cathodes to lose capacity and voltage because oxidized lattice oxygen escapes as O₂.

Oxygen vacancies as OER active sites in perovskites

Oxygen vacancies in perovskite oxides, written ABO3-δ, are missing lattice oxygens that serve as catalytic active sites for the oxygen evolution reaction in water electrolysis and metal-air batteries.

Oxygen-depolarized cathode

An oxygen-depolarized cathode (ODC) is a gas diffusion electrode in chlorine electrolysis that reduces oxygen instead of evolving hydrogen, cutting electricity demand by about 30 percent.

Oxyhydrogen

Oxyhydrogen, also known as knallgas or Brown's gas, is a 2:1 mixture of hydrogen and oxygen that burns with a very hot flame back to water.

Oyot Oil and Gas Field

The Oyot Oil and Gas Field is an offshore oil and gas field in Nigeria in concession block OML 70, distinct from the similar Oyo field in OML 120.

Oyster Creek Nuclear Generating Station

Oyster Creek Nuclear Generating Station was a boiling water reactor at Forked River, New Jersey, that operated from 1969 to 2018 and was the oldest operating commercial nuclear plant in the United States.

Oyu Tolgoi Investment Agreement

The Oyu Tolgoi Investment Agreement is a 30-year contract signed in 2009 between Mongolia, Ivanhoe Mines, and Rio Tinto for the Oyu Tolgoi copper and gold mine.

Ozen-Zhetybay-Aktau Oil Pipeline

The Ozen-Zhetybay-Aktau Oil Pipeline is a heated crude oil pipeline in Kazakhstan, opened in 1966 to link the Uzen and Zhetybay oil fields with the Caspian port of Aktau.

Ozenmunaigas

Ozenmunaigas (Kazakh: Өзенмұнайгаз) is a Kazakhstani oil and gas production company wholly owned by KazMunayGas, which develops the Uzen and Karamandybas fields and produced about 5 million tonnes of oil in 2024.

P L Bartow power station

P L Bartow power station, also called the Bartow Combined Cycle Station, is a natural gas-fired plant owned by Duke Energy Florida on Weedon Island, St. Petersburg, Florida.