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Conoco
Conoco, or Continental Oil, was an American integrated oil company founded in 1875 in Ogden, Utah, that merged with Phillips Petroleum in 2002 to form ConocoPhillips.
ConocoPhillips
ConocoPhillips is an American independent exploration and production company headquartered in Houston, Texas, formed in 2002 by the merger of Conoco and Phillips Petroleum and active in 15 countries.
ConocoPhillips Optimized Cascade process
The ConocoPhillips Optimized Cascade process is an LNG liquefaction technology developed by Phillips Petroleum in the 1960s, first used at the Kenai plant in Alaska in 1969.
Conowingo Dam
Conowingo Dam, completed in 1928, is a hydroelectric dam on the lower Susquehanna River in northern Maryland between Cecil and Harford counties, producing up to 572 megawatts.
Conservation voltage reduction
Conservation voltage reduction (CVR) is a grid technique in which utilities lower feeder voltage a few percent to cut energy use, peak demand, and line losses.
CONSOL Energy
CONSOL Energy was an American coal producer and exporter headquartered in Canonsburg, Pennsylvania, tracing its mining operations to 1864 and merging with Arch Resources in January 2025 to form Core Natural Resources.
Consolidated bioprocessing
Consolidated bioprocessing (CBP) is a cellulosic ethanol process in which enzyme production, biomass hydrolysis, and fermentation of hexose and pentose sugars occur in a single step by one microorganism, proposed in 1996.
Consolidated Edison
Consolidated Edison, commonly called Con Edison or Con Ed, is a New York holding company supplying electricity, gas, and steam to New York City and Westchester County.
Constant volume combustion
Constant volume combustion is a heat-addition process in which fuel burns in a fixed volume, raising pressure and temperature together and offering higher gas turbine efficiency than constant-pressure burning.
Constant-voltage transformer
A constant-voltage transformer, or ferroresonant transformer, keeps output voltage nearly constant despite wide input swings using magnetic core saturation and a resonant capacitor, with no electronics or moving parts.
Constellation Energy
Constellation Energy is a Baltimore-based American energy company created in 2022 from Exelon's separation; it operates the largest US nuclear fleet and acquired Calpine in 2026.
Constellation Oil Services Holding
Constellation Oil Services Holding, formerly QGOG Constellation, is a Luxembourg-incorporated offshore drilling contractor controlled by the Queiroz Galvão family and operating mainly in Brazil, where it is the largest drilling company.
Consumers Energy
Consumers Energy is an investor-owned utility headquartered in Jackson, Michigan, founded in 1886 and serving 1.9 million electric and 1.8 million gas customers as the principal subsidiary of CMS Energy.
Containment building
A containment building is the strong, essentially leak-tight structure that surrounds a nuclear power reactor to prevent or control the release of radioactive substances to the environment, typically of thick concrete and steel.
Contingent resources
Contingent resources are quantities of petroleum estimated to be potentially recoverable from known accumulations, but not yet commercially developable because contingencies remain unresolved, per the SPE PRMS.
Continuous miner
A continuous miner is an underground mining machine that cuts coal or soft rock from the face and loads it onto an onboard conveyor without blasting.
Contracts for Difference (United Kingdom)
Contracts for Difference are the United Kingdom's main support scheme for low-carbon electricity generators, stabilizing their revenue at a fixed strike price through auctions held since 2014.
Control Pilot
The Control Pilot (CP) is the signaling circuit between an electric vehicle and its charging station, whose duty cycle tells the vehicle the maximum AC charging current available.
Convention on Nuclear Safety
The Convention on Nuclear Safety (CNS) is a legally binding 1994 treaty obliging states with civilian nuclear power plants to submit to periodic safety peer review.
Conversion-type cathode
A conversion-type cathode is a battery positive electrode that stores charge by breaking down and reforming its host compound, storing 2 to 3 lithium per metal instead of less than one.
Conversion–alloy mechanism
The conversion–alloy mechanism is a sodium-storage reaction in certain sodium-ion battery anodes, where a metal compound first converts to metal and a sodium compound, then alloys with more sodium.
Converter transformer
A converter transformer is a power transformer that connects an AC network to power-electronic converter valves, chiefly in HVDC transmission stations and industrial rectifier plants.
Conway (NGL hub)
Conway is a natural gas liquids market hub in central Kansas, the second-largest in the United States after Mont Belvieu, Texas, built around salt-cavern storage and fractionation.
Cooper nuclear power plant
Cooper Nuclear Station is a single-unit boiling water reactor plant near Brownville, Nebraska, owned and operated by the Nebraska Public Power District since 1974 and generating about 835 megawatts.
Cooperative Energy
Cooperative Energy, formerly South Mississippi Electric, is a not-for-profit, member-owned generation and transmission cooperative in Hattiesburg, Mississippi, founded in 1941 to supply 11 distribution cooperatives serving about 460,000 members across 55 counties.
CoP hydrogen-evolution catalysts
CoP hydrogen-evolution catalysts are cobalt phosphide electrocatalysts, including CoP, Co₂P, and CoP₂, that drive the hydrogen evolution reaction during water electrolysis as low-cost alternatives to platinum-group catalysts.
COP28 declaration to triple nuclear energy
The Declaration to Triple Nuclear Energy is a 2023 pledge by 22 countries at COP28 in Dubai to triple nuclear capacity from 2020 levels by 2050.
Copelouzos Group
Copelouzos Group (Όμιλος Κοπελούζου) is a Greek infrastructure and energy investment group founded in 1972, known for the GREGY Egypt–Greece interconnector and the Alexandroupolis LNG terminal.
COPEM-PT Oficina Oil Pipeline
The COPEM-PT Oficina oil pipeline is a 141-kilometer, 30-inch crude oil pipeline in eastern Venezuela, carrying diluted extra-heavy crude from Petromonagas to El Tigre, operated by PDVSA.
Copper indium gallium selenide solar cell
Copper indium gallium selenide (CIGS) solar cells are thin-film photovoltaic devices whose Cu(In,Ga)Se2 absorber has a tunable bandgap, with a record lab efficiency of 23.6%.