Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids.
Exploration and reserves, storage, imports and exports, production, prices, sales.
Sales, revenue and prices, power plants, fuel use, stocks, generation, trade, demand & emissions.
Energy use in homes, commercial buildings, manufacturing, and transportation.
Reserves, production, prices, employment and productivity, distribution, stocks, imports and exports.
Includes hydropower, solar, wind, geothermal, biomass and ethanol.
Uranium fuel, nuclear reactors, generation, spent fuel.
Comprehensive data summaries, comparisons, analysis, and projections integrated across all energy sources.
Monthly and yearly energy forecasts, analysis of energy topics, financial analysis, congressional reports.
Financial market analysis and financial data for major energy companies.
Greenhouse gas data, voluntary reporting, electric power plant emissions.
Maps, tools, and resources related to energy disruptions and infrastructure.
State energy information, including overviews, rankings, data, and analyses.
Maps by energy source and topic, includes forecast maps.
International energy information, including overviews, rankings, data, and analyses.
Regional energy information including dashboards, maps, data, and analyses.
Tools to customize searches, view specific data sets, study detailed documentation, and access time-series data.
EIA's free and open data available as API, Excel add-in, bulk files, and widgets
Come test out some of the products still in development and let us know what you think!
Forms EIA uses to collect energy data including descriptions, links to survey instructions, and additional information.
Sign up for email subcriptions to receive messages about specific EIA products
Subscribe to feeds for updates on EIA products including Today in Energy and What's New.
Short, timely articles with graphics on energy, facts, issues, and trends.
Lesson plans, science fair experiments, field trips, teacher guide, and career corner.
Reports requested by congress or otherwise deemed important.
Ocean thermal energy conversion (OTEC) is a process or technology for producing energy by harnessing the temperature differences (thermal gradients) between ocean surface waters and deep ocean waters.
Energy from the sun heats the surface water of the ocean. In tropical regions, surface water can be much warmer than deep water. This temperature difference can be used to produce electricity and to desalinate ocean water. Ocean Thermal Energy Conversion (OTEC) systems use a temperature difference (of at least 77° Fahrenheit) to power a turbine to produce electricity. Warm surface water is pumped through an evaporator containing a working fluid. The vaporized fluid drives a turbine/generator. The vaporized fluid is turned back to a liquid in a condenser cooled with cold ocean water pumped from deeper in the ocean. OTEC systems using seawater as the working fluid can use the condensed water to produce desalinated water.
Ocean thermal energy conversion system
An experimental OTEC plant on the Kona Coast in Hawaii
Source: U.S. Department of Energy (public domain)
The United States became involved in OTEC research in 1974 with the establishment of the Natural Energy Laboratory of Hawaii Authority. The laboratory is one of the world's leading test facilities for OTEC technology. The laboratory operated a 250 kilowatt (kW) demonstration OTEC plant for six years in the 1990s. The United States Navy supported the development of a 105 kW demonstration OTEC plant at the laboratory site. This facility became operational in 2015 and supplies electricity to the local electricity grid.
Other larger OTEC systems are in development or planned in several countries, mostly to supply electricity and desalinated water for island communities.