176 articles
Kerosene lamp
A kerosene lamp, also known as a paraffin lamp, is a lighting device that burns kerosene through a wick or pressurized jet, long used where electricity is absent.
Laser ignition
Laser ignition is a combustion-ignition method in which a focused pulsed laser beam creates a plasma spark in a fuel–air mixture, replacing the spark plug in engines and combustors.
Lead telluride thermoelectrics
Lead telluride thermoelectrics are materials based on PbTe, a narrow-bandgap semiconductor that converts heat to electricity, used in spacecraft generators since the early space program.
Lighter
A lighter is a portable flame-producing device used to ignite cigarettes, candles, and stoves, burning butane or naphtha; the first lighter was Döbereiner's lamp of 1823.
Liquefied natural gas as bunker fuel
Liquefied natural gas as bunker fuel is the use of natural gas, chilled to a liquid, as fuel for ship engines instead of oil-based marine fuels.
Liquefied petroleum gas
Liquefied petroleum gas, or LP gas, is a fuel of mainly propane and butane, stored as a liquid under pressure and used for cooking, heating, and transport.
List of VM Motori engines
The list of VM Motori engines covers the diesel engines of VM Motori, an Italian manufacturer founded in Cento in 1947, whose engines powered Alfa Romeo, Jeep, and Maserati vehicles.
List of Volkswagen Group diesel engines
The list of Volkswagen Group diesel engines covers the group's TDI diesel engine families, from four-cylinder units like the EA 288 to V6, V8, and V10 diesels.
Magnetohydrodynamic generator
A magnetohydrodynamic generator converts the thermal energy of a hot conducting fluid directly into electricity by passing it through a magnetic field, with no turbine.
MAN Energy Solutions
MAN Energy Solutions, rebranded as Everllence in 2025, is a German manufacturer of large diesel engines and industrial turbines, and the world's largest developer of commercial ship engines.
MAPP gas
MAPP gas is a trademarked fuel gas of methylacetylene and propadiene, developed by Dow Chemical as an acetylene substitute for torches and no longer made in North America since 2008.
Marine Diesel Oil
Marine diesel oil (MDO) is a distillate marine fuel classified as grade DMB under ISO 8217, sitting between marine gas oil and heavier residual intermediate fuel oils.
Methane dehydroaromatization
Methane dehydroaromatization (MDA) is a non-oxidative catalytic reaction that converts methane directly into benzene and hydrogen, first reported in 1993 over a molybdenum-modified zeolite catalyst and still not commercially implemented.
Methanex
Methanex Corporation is a Vancouver-based chemical company and the world's largest methanol producer, operating plants in the United States, Chile, Trinidad and Tobago, New Zealand, Egypt, and Canada.
Methanol fuel
Methanol fuel, also known as wood alcohol, is methanol (CH₃OH) used as a fuel for internal combustion engines, fuel cells, and increasingly ships, where it cuts sulfur and particulate emissions.
Micro combined heat and power
Micro combined heat and power, also called micro-CHP or micro-cogeneration, generates heat and electricity simultaneously from one fuel source, typically replacing a domestic boiler burning natural gas.
Motor oil
Motor oil, also called engine oil, is the lubricant for internal combustion engines, made of mineral or synthetic base stock blended with up to 30 percent additives.
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.
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.
Near-field thermophotovoltaics
Near-field thermophotovoltaics (NF-TPV) is an energy-conversion approach where a nanoscale gap between a hot emitter and a photovoltaic cell lets photon tunneling surpass the blackbody limit.
Nissan YD engine
The Nissan YD engine is a family of four-cylinder automotive diesel engines built by Nissan, produced in 2.2-liter (YD22) and 2.5-liter (YD25) versions that powered the Navara, Pathfinder, and NV350 Caravan.
North West Redwater Partnership
North West Redwater Partnership is an Alberta general partnership, formed in 2011, that designed, financed, built, and operates the Sturgeon Refinery near Redwater, northeast of Edmonton.
Octane rating
The octane rating, or octane number, is a number measuring a spark-ignition fuel's resistance to knocking, defined on a scale where iso-octane is 100 and n-heptane is 0.
Organic Rankine cycle
The Organic Rankine cycle (ORC) converts heat into power using an organic fluid with a lower boiling point than water, suited to sources from 80 to 300 °C.
Organic thermoelectric generator
An organic thermoelectric generator (OTEG) is a solid-state device that converts low-grade heat into electricity using flexible, printable organic semiconductors, aimed chiefly at wearable energy harvesting and Internet-of-Things sensors.
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.
Paraffin wax
Paraffin wax, also known as petroleum wax, is a white, odorless waxy solid of straight-chain saturated hydrocarbons derived from petroleum, used in candles, packaging, cosmetics, and thermal energy storage.
Pearl GTL
Pearl GTL is the world's largest gas-to-liquids plant, at Ras Laffan Industrial City in Qatar, developed by Shell and QatarEnergy and producing 140,000 barrels per day.
Pelton wheel
The Pelton wheel, also called the Pelton turbine, is an impulse-type water turbine Lester Allan Pelton invented in the California gold fields in the 1870s, best suited to high head and low flow.
Petrol engine
A petrol engine, called a gasoline engine in the United States, is a spark-ignited internal combustion engine that burns petrol, igniting the fuel-air mixture with a spark plug.