Onshore wind energy
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Onshore Wind Energy: Barriers, Potential, and Environmental Impact
Barriers to Onshore Wind Energy Implementation
Onshore wind energy has seen significant global diffusion, but its large-scale implementation faces numerous barriers. These barriers can be categorized into market failures, market distortions, economic and financial issues, institutional challenges, technical difficulties, and social obstacles. A systematic review identified 31 barriers across 159 countries, with the most common being inadequate consideration of externalities, uncertain and unsupportive governmental policies, and insufficient transmission grids. These barriers are predominantly present in developing economies with recent diffusion, although they also occur in developed economies regardless of the diffusion stage .
Site-Selection Processes for Onshore Wind Farms
The site-selection process is crucial for the sustainable, technical, and economic viability of onshore wind farms. Key insights from research include methodologies for site selection, exclusion and assessment criteria, spatial planning scales, wind resource analysis, and participatory planning approaches. Effective site selection considers laws, regulations, and policies, and employs suitability index classifications to optimize the placement of wind turbines. These insights are essential for updating site-selection analyses and enhancing global siting implementations .
Future Potential of Onshore Wind Energy in Europe
Onshore wind energy is poised to play a major role in reducing greenhouse gas emissions in Europe. Advanced simulations predict that by 2050, Europe could achieve 13.4 TW of capacity, generating 34.3 PWh annually. This potential is based on future-oriented turbine designs and cost scenarios, indicating that all European countries have the potential to generate wind energy at costs below 6 ct € kWh^-1 . Additionally, a detailed socio-technical atlas reveals a nameplate capacity of 52.5 TW of untapped onshore wind power potential in Europe, sufficient to meet global energy demands through 2050 .
Comparative Environmental Impact: Onshore vs. Offshore Wind Energy
Onshore wind energy generally has a lower environmental impact compared to its offshore counterpart. Life cycle assessments (LCA) show that onshore wind turbines have a greenhouse gas (GHG) emission intensity of 0.082 kg CO2-eq/MJ, whereas offshore turbines have a higher intensity of 0.130 kg CO2-eq/MJ. This difference is primarily due to the additional components and logistics involved in offshore installations. Both onshore and offshore wind turbines have significantly lower GHG emissions compared to coal power plants, highlighting their environmental benefits .
Economic and Technical Potential of Onshore Wind Energy
The global technical potential of onshore wind energy is estimated at 96 PWh per year, which is about 6-7 times the current world electricity consumption. This potential requires an area of 1.1 Gha, comparable to the total global grassland area. The highest regional potential is found in the USA, with 21 PWh per year, while the lowest is in Southeast Asia, Southern and Western Africa, and Japan. With current technology, the cost of generating this energy is approximately 0.07 US$ kWh^-1 .
Conclusion
Onshore wind energy holds significant promise for contributing to a low-carbon future. Despite facing various barriers, its potential for large-scale implementation is substantial, particularly in Europe and the USA. Effective site-selection processes and advanced turbine designs can further enhance its viability. Moreover, onshore wind energy's lower environmental impact compared to offshore installations makes it a more sustainable option for future energy systems. Addressing the identified barriers and optimizing site selection will be crucial for realizing the full potential of onshore wind energy.
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