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.