Energy Yield Assessment
2EN provides energy yield assessments for wind projects, from wind data processing and long-term correction through flow modelling, loss calculations and uncertainty analysis.
Studies combine site measurements, suitable long-term reference data and numerical modelling, with assumptions, losses and key uncertainty sources clearly documented.
Energy yield methodology
The analysis links measured wind conditions with the long-term wind climate, spatial flow variation across the site and expected wind farm production.
Long-term correlation
Site measurements are correlated with suitable long-term reference datasets to establish the long-term wind climate.
Flow modelling
Specialist flow models are used to characterise spatial variation in the wind resource and estimate conditions at turbine locations.
Energy yield estimation
Expected production is calculated using turbine characteristics, layout, losses and project-specific technical assumptions.
International technical participation
2EN is an active member of the MEASNET Site Assessment Expert Group, where technical experience is shared and common approaches are developed for wind measurement, wind resource analysis and energy yield assessment.
Indicative visualization of wind farm modeling.
Uncertainty, losses and energy yield
The energy yield estimate is accompanied by analysis of the main uncertainty sources and losses, so results can be used in technical design and financial analysis.
Key uncertainty sources
- Quality and representativeness of wind measurements.
- Long-term adjustment and interannual variability of the wind climate.
- Vertical and horizontal extrapolation of measurements.
- Flow modelling, topography and surface roughness.
- Turbine characteristics and power curve.
- Losses due to wakes, availability, electrical systems and other project factors.
Design and energy yield outputs
- Selection of turbine type and rating.
- Wind farm layout and comparison of alternative configurations.
- Gross and Net AEP calculations.
- Application of loss assumptions and technical constraints.
- Overall uncertainty analysis.
- P50 / P75 / P90 estimates, where required.
Need an energy yield assessment for your project?
Talk to us about the available data, project stage and assessment requirements.