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Mechanical vapor recompression
Mechanical vapor recompression (MVR) is an energy-saving technique in which a compressor raises the pressure of secondary vapor so it can be reused as the heat source for evaporation.
Mechel
Mechel is a Russian vertically integrated mining and metals company producing coal, iron ore, coke, steel, and power, which grew from a Siberian coal-trading operation founded in the early 1990s.
Medco Energi
Medco Energi (MedcoEnergi) is an Indonesian energy company in Jakarta with oil and gas, power, and mining businesses, founded in 1980 by Arifin Panigoro as Indonesia's first privately owned drilling contractor.
Medgaz
Medgaz is a 210 km subsea natural gas pipeline from Beni Saf, Algeria, to Almería, Spain, the first direct undersea gas link between Algeria and Europe.
Medgaz Gas Pipeline
The Medgaz gas pipeline is a subsea natural gas pipeline running 210 km under the Mediterranean from Beni Saf, Algeria, to Almería, Spain, in service since 2011.
Medicine Hat Oil and Gas Field
The Medicine Hat oil and gas field is a shallow natural gas field under the city of Medicine Hat, Alberta, first discovered by a railway crew in 1883.
Medupi power station
Medupi power station is a dry-cooled, coal-fired baseload power station operated by Eskom near Lephalale in Limpopo province, South Africa, with six supercritical units totaling 4,800 MW.
Medvezhye Oil and Gas Field
The Medvezhye oil and gas field (Медвежье месторождение) is a giant gas field in West Siberia, Russia, discovered in 1967 and producing since 1972 under Gazprom.
Medvezhye-Nadym Gas Pipeline
The Medvezhye-Nadym Gas Pipeline is a pair of natural gas trunklines running about 118 km from the Medvezhye field to Nadym in northwest Siberia, commissioned in 1972 and 1975.
Meenakshi Energy Thermal Power Project
Meenakshi Energy Thermal Power Project, also known as Thamminapatnam TPP, is a 1,000 MW coal-fired power station at Thamminapatnam in Nellore district, Andhra Pradesh, India.
MEG Energy
MEG Energy was a Canadian oil sands company producing roughly 100,000 barrels of bitumen per day at Christina Lake in Alberta using steam-assisted gravity drainage.
Mega Ampere Spherical Tokamak
The Mega Ampere Spherical Tokamak (MAST) is a spherical tokamak at the Culham Centre for Fusion Energy in England, whose reengineered successor, MAST Upgrade, began operation in 2020.
Mega Project (gas pipeline)
Mega Project refers to a multi-billion-dollar gas pipeline megaproject linking producing regions to distant markets, exemplified by Norway's Zeepipe (1993) and the 1,200 km Langeled pipeline to England.
MEGAL Gas Pipeline
The MEGAL is a German long-distance natural gas pipeline system running from the Czech border at Waidhaus to the French border, built between 1975 and 1981.
Megalopolis Lignite Mines
Megalopolis lignite mines: open-pit lignite mines of the Megalopolis Basin, Peloponnese, Greece, worked by PPC since 1969 (434 Mt reserves, four mines: Thoknia, Marathousa, Kyparissia, Choremi) and known for the Marathousa 1 Lower Palaeolithic site.
Megawatt Charging System
The Megawatt Charging System (MCS) is a CharIN charging standard for heavy-duty electric vehicles, delivering DC power up to 3.75 MW, about seven times today's fast charging.
Meixin captive power station
Meixin captive power station, also known as the Jinyang power plant, is a coal-fired captive power station in Tongchuan, Shaanxi, China, supplying an aluminum alloy plant.
Meizhou hydroelectric plant
The Meizhou hydroelectric plant (梅州抽水蓄能电站) is a 2,400 MW pumped-storage hydroelectric station in Wuhua County, Meizhou, Guangdong, China, built in two phases by China Southern Power Grid.
Meizhou II hydroelectric plant
Meizhou II hydroelectric plant is a 1,200 MW pumped-storage power plant in Wuhua, Guangdong, China, completed in November 2025 as the second phase of the 2,400 MW Meizhou station.
Meizhouwan power station
Meizhouwan power station (国投云顶湄洲湾电厂) is a coal-fired power station on Meizhou Bay in Putian, Fujian, China, with an operating capacity of at least 2,786 MW.
Meja Thermal Power Project
The Meja Thermal Power Project is a 2x660 MW coal-fired power station at Meja in Prayagraj district, Uttar Pradesh, owned by NTPC and UPRVUNL through the joint venture MUNPL.
Mejia power station
Mejia power station, or Mejia Thermal Power Station, is a 2,340 MW coal-fired power station in Bankura district, West Bengal, India, owned by the Damodar Valley Corporation.
Mejillones LNG Terminal
Mejillones LNG Terminal (Terminal GNL Mejillones, GNLM) is a liquefied natural gas import and regasification terminal in Mejillones Bay, Chile's Antofagasta Region, operating since 2010 to supply gas for electricity generation in the northern mining region.
Melaka FSRU
Melaka FSRU, formally the Regasification Terminal Sungai Udang, is Malaysia's first LNG import and regasification terminal, built about 3 km off Sungai Udang, Melaka, with two moored LNG carriers and in commercial operation since 2013.
Melbourne Renewable Energy Hub
The Melbourne Renewable Energy Hub is a grid-scale battery facility at Plumpton in Melbourne's west with 600 MW and 1.6 GWh of storage, fully operational since December 2025.
Melones Oil Field
Melones Oil Field is an onshore heavy-oil field in Anzoátegui state, Venezuela, discovered in 1955 by Mene Grande Oil Co. and currently operated by Territorio under a contract with PDVSA.
Membrane electrode assembly
A membrane electrode assembly (MEA) is the layered core of a PEM fuel cell or water electrolyzer, where the electrochemical reactions occur and which largely determines efficiency, lifetime, and cost.
Membrane humidifier
A membrane humidifier is a heat and mass exchanger that humidifies the inlet air of proton exchange membrane fuel cells without moving parts or external water.
Membrane reforming
Membrane reforming is a hydrogen production technique that combines steam reforming of hydrocarbons with in situ hydrogen separation through a palladium membrane, allowing conversion at lower temperatures.
Membrane-type LNG containment
Membrane-type LNG containment is a cryogenic cargo system in which thin metallic membranes supported by a ship's inner hull hold LNG at about -163 °C and atmospheric pressure.