Energy terminology · MLC-0117

Energy terms: L (94)

• LampA term generally used to describe artificial light. The term is often used when referring to a "bulb" or...
• Land useThe ultimate uses to be permitted for currently contaminated lands, waters, and structures at each Department...
• Landfill gasGas that is generated by decomposition of organic material at landfill disposal sites. The average...
• Land-use restrictionsConstraints placed upon mining by societal policies to protect surface features or entities that could be...
• LangleyA unit or measure of solar radiation; 1 calorie per square centimeter or 3.69 Btu per square foot.
• Large passenger carA passenger car with more than 120 cubic feet of interior passenger and luggage volume.
• Large pickup truckA pickup truck weighing between 4,500-8,500 lbs gross vehicle weight (GVW).
• Large-scale solarSolar thermal and photovoltaic generating units at power plants larger than or equal to one megawatt.
• Latitude and longitudeThe distance on the earth's surface measured, respectively, north or south of the equator and east or west of...
• lbPound
• LeachateThe liquid that has percolated through the soil or other medium.
• Lead acid batteryAn electrochemical battery that uses lead and lead oxide for electrodes and sulfuric acid for the electrolyte.
• Leaded gasolineA fuel that contains more than0.05 gram of lead per gallon or more than 0.005 gram of phosphorus per gallon.
• Leaded premium gasolineGasoline having an antiknock index (R+M/2) greater than 90 and containing more than 0.05 grams of lead or...
• Leaded regular gasolineGasoline having an antiknock index (R+M/2) greater than or equal to 87 and less than or equal to 90 and...
• Leading edgeIn reference to a wind energy conversion system, the area of a turbine blade surface that first comes into...
• Lease and plant fuelNatural gas used in well, field, and lease operations (such as gas used in drilling operations, heaters...
• Lease condensateLight liquid hydrocarbons recovered from lease separators or field facilities at associated and...
• Lease equipmentAll equipment located on the lease except the well to the point of the "Christmas tree."
• Lease fuelNatural gas used in well, field, and lease operations, such as gas used in drilling operations, heaters...
• Lease operationsAny well, lease, or field operations related to the exploration for or production of natural gas prior to...
• Lease separation facilityA facility installed at the surface for the purpose of (a) separating gases from produced crude oil and water...
• Lease separatorA facility installed at the surface for the purpose of separating the full well stream volume into two or...
• Leasehold reservesNatural gas liquid reserves corresponding to the leasehold production defined above.
• LesseeAn independent marketer who leases the station and land and has use of tanks, pumps, signs, etc. A lessee...
• Levelized costThe present value of the total cost of building and operating a generating plant over its economic life...
• Leverage ratioA measure that indicates the financial ability to meet debt service requirements and increase the value of...
• LEVPLow Emissions Vehicle Program.
• LiabilityAn amount payable in dollars or by future services to be rendered.
• Licensed site capacityCapacity (number of assemblies) for which the site is currently licensed.
• LicenseesEntity that has been granted permission to engage in an activity otherwise unlawful (i.e., hydropower...
• Life extensionRestoration or refurbishment of a plant to its original performance without the installation of new...
• LiftThe force that pulls a wind turbine blade, as opposed to drag.
• Lifting costsThe costs associated with the extraction of a mineral reserve from a producing property.
• Light bulbsA term generally used to describe a man-made source of light. The term is often used when referring to a...
• Light gas oilsLiquid petroleum distillates heavier than naphtha, with an approximate boiling range from 401 degrees to 650...
• Light railAn electric railway with a "light volume" traffic capacity compared to "heavy rail." Light rail may use...
• Light trucksAll single unit two-axle, four-tire trucks, including pickup trucks, sports utility vehicles, vans, motor...
• Light waterOrdinary water (H_2O), as distinguished from heavy water or deuterium oxide (D_2O).
• Light water reactorA nuclear reactor that uses water as the primary coolant and moderator, with slightly enriched uranium as...
• Light-duty vehiclesVehicles weighing less than 8,500 lbs (include automobiles, motorcycles, and light trucks).
• Lighting conservation featureA building feature or practice designed to reduce the amount of energy consumed by the lighting system.
• Lighting Demand-Side Management (DSM) programADSM program designed to promote efficient lighting systems in new construction or existing facilities...
• Lighting equipmentThese are light bulbs used to light the building's interior, such as incandescent light bulbs, fluorescent...
• LightsAll of the light bulbs controlled by one switch are counted as one light. For example, a chandelier with...
• LigniteThe lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam-electric...
• LIHEAPLow-Income Home Energy Assistance Program.
• Line lossElectric energy lost because of the transmission of electricity. Much of the loss is thermal in nature.
• Line-miles of seismic explorationThe distance along the Earth's surface that is covered by seismic surveying.
• Liquefied natural gasNatural gas (primarily methane) that has been liquefied by reducing its temperature to -260 degrees...
• Liquefied petroleum gasesA group of hydrocarbon gases, primarily propane, normal butane, and isobutane, derived from crude oil...
• Liquefied refinery gasesHydrocarbon gas liquids produced in refineries from processing of crude oil and unfinished oils. They are...
• Liquid collectorA medium-temperature solar thermal collector, employed predominantly in water heating, which uses pumped...
• Liquid fuelsAll petroleum including crude oil and products of petroleum refining, natural gas liquids, biofuels, and...
• Liquid metal fast breeder reactorA nuclear breeder reactor, cooled by molten sodium, in which fission is caused by fast neutrons.
• LNG feedgasThe total volume of natural gas delivered to an LNG terminal that is used in the liquefaction process. This...
• LNG send-outThe volume of natural gas that an LNG terminal or facility can regasify and deliver into transmission or...
• Load control programA program in which the utility company offers a lower rate in return for having permission to turn off the...
• Load curveThe relationship of power supplied to the time of occurrence. Illustrates the varying magnitude of the load...
• Load diversityThe difference between the peak of coincident and noncoincident demands of two or more individual loads.
• Load (electric)An end-use device or customer that receives power from the electric system. Source: Glossary of Terms Used in...
• Load factorThe ratio of the average load to peak load during a specified time interval.
• Load followingRegulation of the power output of electric generators within a prescribed area in response to changes in...
• Load levelingAny load control technique that dampens the cyclical daily load flows and increases baseload generation. Peak...
• Load loss (3 hours)Any significant incident on an electric utility system that results in a continuous outage of 3 hours or...
• Load management techniqueUtility demand management practices directed at reducing the maximum kilowatt demand on an electric system...
• Load on equipmentOne hundred percent load is the maximum continuous net output of the unit at normal operating conditions...
• Load reduction requestThe issuance of any public or private request to any customer or the general public to reduce the use of...
• Load shapeA method of describing peak load demand and the relationship of power supplied to the time of occurrence.
• Load sheddingIntentional action by a utility that results in the reduction of more than 100 megawatts (MW) of firm...
• Load-serving entity (electric)Secures energy and transmission service (and related Interconnect Operations Services) to serve the...
• Local distribution companyA legal entity engaged primarily in the retail sale and/or delivery of natural gas through a distribution...
• Locational marginal priceA locational marginal price (LMP) is the price for electricity that reflects the incremental cost to increase...
• Long tonA unit that equals 20 long hundred weight or 2,240 pounds. Used mainly in England.
• Long-term debtDebt securities or borrowing shaving a maturity of more than one year.
• Long-term purchaseA purchase contract under which at least one delivery of material is scheduled to occur during the second...
• Longwall miningAn automated form of underground coal mining characterized by high recovery and extraction rates, feasible...
• Loop flowThe movement of electric power from generator to load by dividing along multiple parallel paths; it...
• Loss of service (15 minutes)Any loss in service for greater than 15 minutes by an electric utility of firm loads totaling more than 200...
• Low Btu gasA fuel gas with a heating value between 90 and 200 Btu per cubic foot.
• Low E glassLow-emission glass reflects up to 90% of long-wave radiation, which is heat, but lets in short-wave...
• Low flow showerheadsReduce the amount of water flow through the showerhead from 5 to 6 gallons a minute to 3 gallons a minute.
• Low flush toiletA toilet that uses less water than a standard one during flushing, for the purpose of conserving water...
• Low headVertical difference of 100 feet or less in the upstream surface water elevation (headwater) and the...
• Low Income Home Energy Assistance ProgramThe purpose of LIHEAP is to assist eligible households to meet the cost of heating or cooling in residential...
• Low power testingThe period of time between a plant's nuclear generating unit's initial fuel loading date and the issuance of...
• Low sulfur diesel (LSD) fuelDiesel fuel containing more than 15 but less than 500 parts per million (ppm) sulfur.
• Low temperature collectorsMetallic or nonmetallic collectors that generally operate at temperatures below 110 degrees Fahrenheit and...
• Lower 48 statesLower contiguous portion of the United States that does not include Alaska, Hawaii, the Federal Offshore Gulf...
• Lower Heating ValueA measure of heat content based on the net energy content of a combustible fuel.
• Low-pressure sodium lampA type of lamp that produces light from sodium gas contained in a bulb operating at apartial pressure of 0.13...
• LubricantsSubstances used to reduce friction between bearing surfaces, or incorporated into other materials used as...
• LumenAn empirical measure of the quantity of light. It is based upon the spectral sensitivity of the photosensors...
• Lumens/Watt (lpw)A measure of the efficacy (efficiency) of lamps. It indicates the amount of light (lumens) emitted by the...

94 of 2,515 terms in Energy terminology (MLC-0117). Request the full dataset.