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Dongsheng Fusion
Dongsheng Fusion (东升聚变), also known as SunUp Fusion, is a Shanghai nuclear fusion startup founded in 2025 by Fudan University's team under Xu Min, developing a deuterium-helium-3 tokamak.
Dongsheng Tight Gas Field
The Dongsheng Tight Gas Field (东胜气田) is a tight-sandstone gas field on the northern margin of the Ordos Basin in Inner Mongolia, China, operated by Sinopec.
Dongtan Coal Mine
Dongtan Coal Mine (东滩煤矿) is an underground coal mine in Zoucheng, Shandong, China, owned by Yanzhou Coal Mining Company, in commercial production since 1989 with a capacity of 7.5 million tonnes a year.
Dongying–Guangrao Oil Pipeline
The Dongying–Guangrao Oil Pipeline (东营港-广饶原油输油管道) is a crude oil and refined-product pipeline system in Shandong, China, running from Dongying Port on the Bohai Bay south to Guangrao County, operated by Dongying Haixin Storage.
Dongying–Linyi Parallel Oil Pipeline
The Dongying–Linyi Parallel Oil Pipeline (东临输油管道复线) is a heated crude oil pipeline in Shandong, China, commissioned in September 1998 as a second, parallel line carrying Shengli crude to refineries.
Doosan Enerbility
Doosan Enerbility (두산에너빌리티), formerly Doosan Heavy Industries & Construction, is a South Korean Doosan Group company manufacturing power plant equipment, including boilers, turbines, and nuclear components, and building plants in more than 40 countries.
Dopant-free hole transport
Dopant-free hole transport is the design of hole transport materials for perovskite solar cells that are intrinsically conductive without chemical dopants, improving stability and cutting fabrication cost; top efficiencies exceed 25%.
Dorad power station
The Dorad power station is a privately owned dual-fuel combined-cycle gas plant south of Ashkelon, Israel, with an output of about 860 MW since May 2014.
Doroud Oil and Gas Field
The Doroud Oil and Gas Field is Iran's largest offshore oil field, an anticline in the northern Persian Gulf partly underlying Kharg Island, discovered in 1961.
Dorsey Converter Station
Dorsey Converter Station is an HVDC converter station in Rosser, Manitoba, where electricity from northern Nelson River hydro stations is converted back to AC, carrying over 70% of Manitoba's power.
Dörtyol FSRU
The Dörtyol FSRU is a floating storage and regasification unit that imports LNG at Dörtyol, Hatay Province, on Türkiye's Mediterranean coast, operated by BOTAŞ and in service since 2018.
Dos Bocas refinery
The Dos Bocas refinery, formally the Olmeca refinery (Refinería Olmeca de Dos Bocas), is a Mexican petroleum refinery operated by Pemex at the port of Dos Bocas, Tabasco.
Doswell Energy Center
Doswell Energy Center is a natural gas-fired power station in Ashland, Hanover County, Virginia, owned by LS Power, generating about 1,313 MW across nine generators since 1991.
Double containment
Double containment is a nuclear reactor design with two concentric walls enclosing the reactor, used in French 1300 MWe and N4 reactors and the EPR.
Double H Pipeline
The Double H Pipeline is a 485-mile crude oil pipeline from Dore, North Dakota, to Guernsey, Wyoming, opened in 2015 and owned by Kinder Morgan.
Doubly-fed induction generator
The doubly-fed induction generator (DFIG) is a wind turbine generator whose rotor is fed through a partially rated converter, allowing variable-speed operation at low converter cost.
Douhe power station
Douhe power station (陡河发电厂) is a coal-fired power and heating plant in Tangshan, Hebei, China, owned by Datang International, replaced in 2025 by two 660 MW ultra-supercritical units.
Dounreay
Dounreay, in Caithness, Scotland, was the UK's fast breeder reactor research site from 1954, run by UKAEA and now the NDA/NRS; notable for the 1977 waste shaft explosion, beach radioactive particles, and major decommissioning.
Dounreay Fast Reactor
The Dounreay Fast Reactor was an experimental fast breeder reactor at Dounreay in northern Scotland, the world's first fast reactor to supply a national grid.
Dow Jones Best-in-Class Asia Pacific Index
The Dow Jones Best-in-Class Asia Pacific Index, until February 2025 named the Dow Jones Sustainability Asia Pacific Index, tracks the top sustainability performers among Asia-Pacific's largest companies.
Dowletabat-Deryalyk Gas Pipeline
The Dowletabat-Deryalyk Gas Pipeline (Döwletabat-Derýalyk) carries natural gas in Turkmenistan from the Dowletabat field to the Deryalyk compressor station as part of the Central Asia–Center system.
Downhole heat exchanger
A downhole heat exchanger extracts geothermal heat inside a wellbore through a closed loop of circulating fluid, eliminating surface discharge and the need for reinjection wells.
Downstream (petroleum industry)
Downstream, also known as the downstream oil industry, is the petroleum industry term for refining crude oil into fuels and marketing them, contrasted with upstream production.
DPP-based small-molecule donors
DPP-based small-molecule donors are conjugated organic molecules built around the diketopyrrolopyrrole (DPP) chromophore that act as electron donors in organic solar cells, reaching power conversion efficiencies up to 12%.
Dr Narla Tata Rao Thermal Power Station
Dr Narla Tata Rao Thermal Power Station, also known as Vijayawada Thermal Power Station, is a 2,560 MW coal-fired power station at Ibrahimpatnam in Andhra Pradesh, India, owned by APGENCO.
Draft tube
A draft tube is the conduit carrying water from the runner of a reaction turbine, such as a Francis or Kaplan, down to the tailrace, recovering kinetic energy.
Drag-reducing agent
A drag-reducing agent, also called a flow improver, is a chemical additive injected in parts-per-million concentrations into pipelines to suppress turbulence and increase crude oil throughput without new pipe.
Dragon LNG Terminal
Dragon LNG Terminal is a liquefied natural gas import terminal at Milford Haven in Pembrokeshire, Wales, operational since 2009 and supplying over 10% of UK gas demand.
Dragon reactor
The Dragon reactor was the first experimental high-temperature gas-cooled reactor, a 20 MW helium-cooled design at Winfrith in Dorset built by twelve European countries and operated from 1964 to 1975.
Dragonfly Energy
Dragonfly Energy is a Reno, Nevada lithium battery maker founded in 2012 by Denis Phares, best known for its Battle Born Batteries brand and listed on Nasdaq in 2022.