Glossary

Glossary of Renewable Energy Terms

Energy Sources

  • Solar Energy: Energy obtained from sunlight, converted into electricity (photovoltaic) or heat (thermal).
  • Wind Energy: Energy generated by the movement of wind, typically captured by wind turbines.
  • Biomass: Organic material (plant or animal) used as a renewable energy source.
  • Biogas: Combustible gas produced from the anaerobic decomposition of organic matter.
  • Biodiesel: Renewable fuel derived from vegetable oils or animal fats.
  • Ethanol: Alcohol fuel produced from the fermentation of plant-based sugars.
  • Green Hydrogen: Hydrogen produced by water electrolysis using only renewable electricity.
  • Hydropower (Hydroelectric Energy): Energy generated from the movement of water in rivers or reservoirs.
  • Tidal Energy: Energy obtained from the rise and fall of ocean tides.
  • Geothermal Energy: Thermal energy sourced from within the Earth.

Technologies and Processes

  • Photovoltaic (PV): System that converts sunlight directly into electricity through solar cells.
  • Wind Turbine: Device that converts the kinetic energy of wind into mechanical or electrical energy.
  • Gasification: Thermochemical process that converts solid biomass into a combustible gas.
  • Pyrolysis: Thermal decomposition of organic material in the absence of oxygen.
  • Electrolysis: Process of splitting water into hydrogen and oxygen using electrical current.
  • Power-to-X (PtX): Technologies that convert renewable electricity into other energy carriers (e.g., hydrogen, synthetic fuels).
  • Smart Grid: Intelligent electricity network integrating generation, distribution, and consumption using digital technologies.
  • Energy Storage: Technologies used to store energy (e.g., batteries, hydrogen, compressed air).
  • Curtailment: The reduction or discarding of renewable energy output due to infrastructure or demand limitations.

Policies and Related Concepts

  • Energy Transition: Shift from fossil fuel-based energy systems to renewable and sustainable sources.
  • Energy Efficiency: Efficient use of energy to reduce waste.
  • Carbon Footprint: Amount of CO₂ equivalent emitted by human activities.
  • Carbon Neutrality: Balance between the amount of carbon emitted and removed from the atmosphere.
  • Fiscal Incentives: Government-provided benefits to stimulate the adoption of renewable energy (e.g., tax exemptions).
  • Energy Policy: Set of strategies and actions guiding the production, distribution, and use of energy.
  • Distributed Generation: Energy production close to the point of consumption (e.g., rooftop solar panels).

Units and Indicators

  • kW (Kilowatt): Unit of electric power (1,000 watts).
  • MW (Megawatt): 1,000 kilowatts.
  • GW (Gigawatt): 1,000 megawatts.
  • kWh (Kilowatt-hour): Unit of energy used to measure consumption.
  • Capacity Factor: Ratio between actual energy generated and the maximum possible output of a plant.
  • Installed Capacity: Total generation capacity of a power plant or system.

Institutions