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National Pipe Network Group Southwest Oil and Gas Pipeline
National Pipe Network Group Southwest Oil and Gas Pipeline is a PipeChina subsidiary operating the trunk oil and gas pipelines of Sichuan, Chongqing, and Guizhou.
National Research Universal
The National Research Universal (NRU) was a 135 MWt, heavy-water research reactor at Chalk River, Ontario, in service from 1957 to 2018 and a leading world source of medical isotopes.
National Solar Radiation Data Base
The National Solar Radiation Data Base (NSRDB) is a free, publicly available collection of hourly solar radiation and meteorological data produced by NREL for solar energy planning.
National Solar Thermal Test Facility
The National Solar Thermal Test Facility (NSTTF) is a U.S. Department of Energy facility in Albuquerque, New Mexico, run by Sandia National Laboratories for concentrating solar power research.
National Spherical Torus Experiment
NSTX (National Spherical Torus Experiment) is a magnetic confinement fusion device at the Princeton Plasma Physics Laboratory that tests the spherical tokamak, a compact, apple-shaped alternative to conventional tokamaks.
National Spherical Torus Experiment-Upgrade
The National Spherical Torus Experiment-Upgrade is a spherical tokamak fusion facility at the Princeton Plasma Physics Laboratory, the largest of its kind in the United States.
National Union of Mineworkers
The National Union of Mineworkers (NUM) is a British trade union for coal miners, established in 1945 from the Miners' Federation of Great Britain ahead of coal nationalisation in 1947.
Nationalization of the Iranian oil industry
The nationalization of the Iranian oil industry was the 1951 transfer of Iran's oil from the British-owned Anglo-Iranian Oil Company to the Iranian state, led by Mohammad Mosaddeq.
Natrium
Natrium is a 345 MWe sodium-cooled fast reactor with molten salt storage developed by TerraPower and GE Hitachi, able to boost output to 500 MWe.
Natron Energy
Natron Energy was an American battery manufacturer founded in 2012 as a Stanford University spinout that made sodium-ion batteries for data center backup power and ceased operations in September 2025.
Natural circulation
Natural circulation is coolant flow through a loop without pumps, driven by buoyancy from density differences; it removes decay heat passively in reactors like the ESBWR and AP1000.
Natural Gas Pipeline Company of America
Natural Gas Pipeline Company of America (NGPL), also called Natural, is an interstate natural gas pipeline company carrying gas from Texas to the upper Midwest, centered on Chicago.
Natural gas vehicle
A natural gas vehicle (NGV) is a vehicle that runs on compressed or liquefied natural gas instead of gasoline or diesel, powering some 23 million vehicles worldwide.
Natural graphite
Natural graphite is graphite mined from metamorphic rock deposits rather than synthesized from hydrocarbons. It dominates lithium-ion battery anodes, offering low cost, abundance, and high theoretical capacity.
Natural Resources Canada
Natural Resources Canada (NRCan) is the department of the Government of Canada responsible for natural resources, energy, minerals, and forestry, formed in 1994 and employing nearly 6,000 people.
Natural uranium
Natural uranium (NU, Unat) is uranium whose isotopic composition is unaltered from nature, with 0.711 percent fissile uranium-235, usable as reactor fuel in heavy water reactors like the CANDU.
Natural-gas condensate
Natural-gas condensate, also known as gas condensate or drip gas, is a light liquid hydrocarbon mixture that separates from natural gas underground or at the surface.
Naturally aspirated engine
A naturally aspirated engine, often called an NA engine, is an internal combustion engine that draws intake air at atmospheric pressure with no turbocharger or supercharger.
Nature Energy (company)
Nature Energy (Nature Energy Biogas A/S) was a Danish biogas producer founded in 1979 that became Europe's largest renewable natural gas producer before Shell acquired it in 2023.
Naturgy
Naturgy, formerly Gas Natural Fenosa, is a Spanish utility supplying gas and electricity in Spain and Latin America, tracing its origins to 1843 in Barcelona.
Nautilus Gas Pipeline
The Nautilus Gas Pipeline, often called the Nautilus Pipeline, is a FERC-regulated offshore natural gas pipeline in the Gulf of Mexico serving Louisiana, in service since 1997.
Navajo Generating Station
The Navajo Generating Station was a 2,250-megawatt coal-fired power plant near Page, Arizona, which operated from the early 1970s until it shut down in late 2019.
Navajo Refinery
The Navajo Refinery is a petroleum refinery in Artesia, New Mexico, built in 1925 and owned by HF Sinclair, which processes Permian Basin crude for southwestern markets.
Navajo Transitional Energy Company
Navajo Transitional Energy Company (NTEC) is a coal mining company wholly owned by the Navajo Nation, created in 2013 and owner of the Navajo Mine in New Mexico.
Navigator Energy Services
Navigator Energy Services is an American independent midstream company that builds and operates crude oil and natural gas infrastructure, best known for the Glass Mountain Pipeline in Oklahoma.
Navoi power station
Navoi power station (Navoi TPP) is a gas-fired thermal power plant near Navoi, Uzbekistan, built from 1960 to 1981 for the Navoi Mining and Metallurgical Combine.
Nawara Gas Field
The Nawara Gas Field is Tunisia's largest gas development, an onshore field in the Ghadames Basin in southern Tunisia owned by ETAP and OMV, producing since 2020.
Nayong-1 power station
Nayong-1 power station (纳雍一厂) is a 1,200 MW coal-fired power plant in Nayong county, Bijie, Guizhou, China, built from 2001 to 2004 under the West-to-East power transmission program.
Nazarovskaya power station
Nazarovskaya power station (Nazarovskaya GRES) is a 1,373 MW coal-fired power station in Nazarovo, Krasnoyarsk Krai, Russia. Opened in 1961, it burns local brown coal and supplies most of Nazarovo's heat.
NC3 Gas Field
NC3 Gas Field is a natural gas field in Block SK316, about 200 km north of Bintulu, offshore Sarawak, Malaysia, discovered in 2010 and producing first gas in 2016.