Home›Technologies›Maturity›TRL 3: Experimental Proof of ConceptBrowse ByTRL 3: Experimental Proof of ConceptThis dimension marks how mature a specific energy technology actually is, experimental, emerging or fully commercial. Wikipedia notes that "in some geographic localities, photovoltaic solar or onshore wind is the cheapest new-build electricity," a sign of just how mature those particular technologies have become. Browsing by maturity separates technologies still emerging from those already fully commercial.FactsTRL 3: Experimental Proof of ConceptConnectionsSourcesComments (0)Reader Challenges (0)FactsComparisonDomain Established EraWell-attested1750 1TRL 3: Experimental Proof of ConceptFilter Results127 entriesTechnology TypeAllAbsorption and Adsorption Refrigeration (1)Biological and Photochemical Hydrogen (6)Carbon Capture (1)Direct Energy Conversion Devices (3)Electrostatic and Other Fusion Concepts (7)Enhanced and Advanced Geothermal Systems (4)Flow and Molten Salt Batteries (1)Fuel Cell Types (15)Gasification and Reforming (2)Generation IV and Advanced Concepts (1)Geothermal Heat Pumps and Direct Use (1)Heat Engine Principles and Measurement (1)Heat Pumps (1)Magnetic Confinement Devices (10)Mechanical and Gas Storage Systems (1)Metal-Air Cells (1)Photovoltaic Systems and Applications (1)Physical Effects Behind Solar Cells (1)Rechargeable Batteries (3)Salinity Gradient Power (3)Solar Cell Types (5)Solar Thermal Devices (1)Thermal Energy Storage (1)Thermochemical Water-Splitting Cycles (5)Thermoelectric and Charge Effects (3)Thin-Film Solar Cells (1)Tidal Energy Devices (4)Vertical-Axis Wind Turbines (1)Water Electrolysis (3)Water Turbines (5)Water Wheels (2)Wave Energy Converters (9)Wind Turbines and Wind Farms (4)Energy Source UsedAllBiogas (1)Biomass Energy (4)Coal (2)Ethanol Fuel (1)Geothermal Energy (4)Hydrogen (6)Hydropower (8)Methanol (2)Natural Gas (2)Nuclear Fusion (20)Nuclear Power (1)Ocean Thermal Energy Conversion (1)Osmotic Power (3)Sodium Borohydride (1)Solar Power (13)Tidal and Marine Energy (13)Wind Power (5)Invented EraAll1663 (1)1707 (1)1750 (1)1839 (1)1873 (1)1880 (1)1896 (1)1911 (1)1912 (1)1926 (1)1932 (1)1934 (1)1946 (2)1950 (1)1951 (1)1954 (1)1956 (1)1957 (2)1964 (1)1969 (1)1970 (2)1971 (2)1973 (2)1974 (1)1975 (2)1977 (1)1980 (1)1982 (1)1984 (1)1987 (1)1988 (1)1989 (1)1995 (1)1996 (1)1997 (1)1998 (1)1999 (1)2000 (2)2002 (1)2003 (1)2004 (4)2005 (1)2011 (1)2012 (1)2015 (1)2016 (1)2018 (1)DeveloperAllAlphonse Sagebien (1)Bogdan Maglich (1)Brian O'Regan (1)Fritz Marguerre (1)George Paget Thomson (1)Johann Andreas Segner (1)Leo Szilard (1)Lonnie Johnson (1)Lyman Spitzer (1)Michael Grätzel (1)Michael Perry (1)Moses Blackman (1)Paul Kouris (2)Pierre Curie (1)Sidney Loeb (3)Stephen Salter (1)William Crookes (1)Show ResultsBrowseCompareSelect all 127Airborne Wind Energy SystemTRL 3: Experimental Proof of ConceptAlkaline Anion-Exchange Membrane Fuel CellTRL 3: Experimental Proof of ConceptAluminum-Air BatteryTRL 3: Experimental Proof of ConceptAnion Exchange Membrane ElectrolysisTRL 3: Experimental Proof of ConceptAnomalous Photovoltaic EffectTRL 3: Experimental Proof of ConceptAquanatorTRL 3: Experimental Proof of ConceptArchimedes Wave SwingTRL 3: Experimental Proof of ConceptArtificial PhotosynthesisTRL 3: Experimental Proof of ConceptAtmospheric Vortex EngineTRL 3: Experimental Proof of ConceptAttenuatorTRL 3: Experimental Proof of ConceptBiohybrid Solar CellTRL 3: Experimental Proof of ConceptBubble FusionTRL 3: Experimental Proof of ConceptBumpy TorusTRL 3: Experimental Proof of ConceptCamcon Binary ActuatorTRL 3: Experimental Proof of ConceptCarnot BatteryTRL 3: Experimental Proof of ConceptCeria-Based Thermochemical CycleTRL 3: Experimental Proof of ConceptCETOTRL 3: Experimental Proof of ConceptCO2-Plume GeothermalTRL 3: Experimental Proof of ConceptColliding Beam FusionTRL 3: Experimental Proof of ConceptCompact Wind Acceleration TurbineTRL 3: Experimental Proof of ConceptCopper-Chlorine CycleTRL 3: Experimental Proof of ConceptCrookes RadiometerTRL 3: Experimental Proof of ConceptDark FermentationTRL 3: Experimental Proof of ConceptDense Plasma FocusTRL 3: Experimental Proof of ConceptDiffuser-Augmented Wind TurbineTRL 3: Experimental Proof of ConceptDirect Air CaptureTRL 3: Experimental Proof of ConceptDirect Borohydride Fuel CellTRL 3: Experimental Proof of ConceptDirect Carbon Fuel CellTRL 3: Experimental Proof of ConceptDirect Energy ConversionTRL 3: Experimental Proof of ConceptDirect Ethanol Fuel CellTRL 3: Experimental Proof of ConceptDirect Exchange Geothermal Heat PumpTRL 3: Experimental Proof of ConceptDye-Sensitized Solar CellTRL 3: Experimental Proof of ConceptEinstein RefrigeratorTRL 3: Experimental Proof of ConceptEnergy Tower (Downdraft)TRL 3: Experimental Proof of ConceptEnzymatic Biofuel CellTRL 3: Experimental Proof of ConceptField-Reversed ConfigurationTRL 3: Experimental Proof of ConceptFormic Acid Fuel CellTRL 3: Experimental Proof of ConceptGravitation Water Vortex Power PlantTRL 3: Experimental Proof of ConceptGravity BatteryTRL 3: Experimental Proof of ConceptHigh Temperature Proton Exchange Membrane Fuel CellTRL 3: Experimental Proof of ConceptHigh-Pressure ElectrolysisTRL 3: Experimental Proof of ConceptHigh-Temperature ElectrolysisTRL 3: Experimental Proof of ConceptHot Dry Rock Geothermal EnergyTRL 3: Experimental Proof of ConceptHybrid Sulfur CycleTRL 3: Experimental Proof of ConceptInertial Confinement FusionTRL 3: Experimental Proof of ConceptIntegrated Gasification Fuel Cell CycleTRL 3: Experimental Proof of ConceptIntermediate Band PhotovoltaicsTRL 3: Experimental Proof of ConceptIron Oxide CycleTRL 3: Experimental Proof of ConceptIron-Air BatteryTRL 3: Experimental Proof of ConceptJohnson Thermoelectric Energy ConverterTRL 3: Experimental Proof of ConceptKouris Centri TurbineTRL 3: Experimental Proof of ConceptKvaerner ProcessTRL 3: Experimental Proof of ConceptLevitated DipoleTRL 3: Experimental Proof of ConceptLiquid Metal BatteryTRL 3: Experimental Proof of ConceptLithium-Air BatteryTRL 3: Experimental Proof of ConceptLuminescent Solar ConcentratorTRL 3: Experimental Proof of ConceptMagnetized Liner Inertial FusionTRL 3: Experimental Proof of ConceptMagnetized Target FusionTRL 3: Experimental Proof of ConceptMembraneless Fuel CellTRL 3: Experimental Proof of ConceptMetal Hydride Fuel CellTRL 3: Experimental Proof of ConceptMethane PyrolysisTRL 3: Experimental Proof of ConceptMicrobial Electrolysis CellTRL 3: Experimental Proof of ConceptMicrobial Fuel CellTRL 3: Experimental Proof of ConceptMigmaTRL 3: Experimental Proof of ConceptMist LiftTRL 3: Experimental Proof of ConceptMulti-Rotor Wind TurbineTRL 3: Experimental Proof of ConceptMuon-Catalyzed FusionTRL 3: Experimental Proof of ConceptOrganic Solar CellTRL 3: Experimental Proof of ConceptOscillating Wave Surge ConverterTRL 3: Experimental Proof of ConceptOyster Wave Energy ConverterTRL 3: Experimental Proof of ConceptPanemone WindmillTRL 3: Experimental Proof of ConceptPelamis Wave Energy ConverterTRL 3: Experimental Proof of ConceptPhotocatalytic Water SplittingTRL 3: Experimental Proof of ConceptPhotoelectrochemical CellTRL 3: Experimental Proof of ConceptPhotofermentationTRL 3: Experimental Proof of ConceptPhoton-Intermediate Direct Energy ConversionTRL 3: Experimental Proof of ConceptPiezoelectricityTRL 3: Experimental Proof of ConceptPlasma Deep Drilling TechnologyTRL 3: Experimental Proof of ConceptPlasmonic Solar CellTRL 3: Experimental Proof of ConceptPoint AbsorberTRL 3: Experimental Proof of ConceptPolywellTRL 3: Experimental Proof of ConceptPressure-Retarded OsmosisTRL 3: Experimental Proof of ConceptProtonic Ceramic Fuel CellTRL 3: Experimental Proof of ConceptPyroelectric FusionTRL 3: Experimental Proof of ConceptPyroelectricityTRL 3: Experimental Proof of ConceptQuantum Dot Solar CellTRL 3: Experimental Proof of ConceptReformed Methanol Fuel CellTRL 3: Experimental Proof of ConceptRegenerative Fuel CellTRL 3: Experimental Proof of ConceptReverse ElectrodialysisTRL 3: Experimental Proof of ConceptReverse Overshot Water-WheelTRL 3: Experimental Proof of ConceptReversed Field PinchTRL 3: Experimental Proof of ConceptReversible Solid Oxide CellTRL 3: Experimental Proof of ConceptSagebien WheelTRL 3: Experimental Proof of ConceptSalinity Gradient PowerTRL 3: Experimental Proof of ConceptSalter's DuckTRL 3: Experimental Proof of ConceptSand BatteryTRL 3: Experimental Proof of ConceptSegner WheelTRL 3: Experimental Proof of ConceptShrouded Tidal TurbineTRL 3: Experimental Proof of ConceptSolar Augmented Geothermal EnergyTRL 3: Experimental Proof of ConceptSolar Updraft TowerTRL 3: Experimental Proof of ConceptSolid Acid Fuel CellTRL 3: Experimental Proof of ConceptSolid Oxide Electrolysis CellTRL 3: Experimental Proof of ConceptSolid-State BatteryTRL 3: Experimental Proof of ConceptSpherical TokamakTRL 3: Experimental Proof of ConceptSpheromakTRL 3: Experimental Proof of ConceptSteffturbineTRL 3: Experimental Proof of ConceptStellaratorTRL 3: Experimental Proof of ConceptStructural BatteryTRL 3: Experimental Proof of ConceptStructural Composite SupercapacitorTRL 3: Experimental Proof of ConceptSulfur-Iodine CycleTRL 3: Experimental Proof of ConceptThermionic ConverterTRL 3: Experimental Proof of ConceptThermoacoustic Heat EngineTRL 3: Experimental Proof of ConceptThermoacousticsTRL 3: Experimental Proof of ConceptThermophotovoltaicTRL 3: Experimental Proof of ConceptTidal KiteTRL 3: Experimental Proof of ConceptToroidal SolenoidTRL 3: Experimental Proof of ConceptTriboelectric EffectTRL 3: Experimental Proof of ConceptTyson TurbineTRL 3: Experimental Proof of ConceptUnitized Regenerative Fuel CellTRL 3: Experimental Proof of ConceptVortex BladelessTRL 3: Experimental Proof of ConceptWater Wall TurbineTRL 3: Experimental Proof of ConceptWave DragonTRL 3: Experimental Proof of ConceptWave MotorTRL 3: Experimental Proof of ConceptZinc-Air Fuel CellTRL 3: Experimental Proof of ConceptZinc-Ion BatteryTRL 3: Experimental Proof of ConceptZinc-Zinc Oxide CycleTRL 3: Experimental Proof of ConceptZ-PinchTRL 3: Experimental Proof of ConceptConnectionsShowing the first 400 of 599 connections.Sources1. Energy development - WikipediaEnergy development, Fossil Fuels section, Industrial Revolution sentenceQuote, Energy development, Fossil Fuels section, Industrial Revolution sentenceThe use of fossil fuels in the 18th and 19th centuries set the stage for the Industrial Revolution.View the SourceEncyclopedia BritannicaEncyclopedia Britannica, Inc.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.