GEOGRAPHY & CARTOGRAPHY CALCULATOR
Modelwind Power Site
A precise tool.
What is the Modelwind Power Site & How does it work?
Wind power density quantifies the kinetic energy flux of the wind passing through a unit area and is a fundamental metric for evaluating the feasibility of a wind energy site. The basic relationship is derived from the kinetic energy of a moving air parcel, where the power per unit area is proportional to the air density and the cube of the wind speed at the turbine hub height. Because wind speed varies with height and surface roughness, the powerβlaw profile is commonly used to extrapolate measured speeds to the hub height before applying the density formula.
P/A = \frac{1}{2} \rho v^{3}
P/A = wind power density (WΒ·m-2); \rho = air density (kgΒ·m-3); v = wind speed at hub height (mΒ·s-1)
Parameters
Result
β
Frequently Asked Questions
What is wind power density?
Wind power density is the amount of kinetic energy in the wind per unit area, crucial for assessing wind energy potential.
How does wind speed affect wind power density?
Wind power density increases with the cube of wind speed, meaning even a small increase in speed significantly boosts power output.
What is the role of air density in wind power calculations?
Air density affects wind power density directly; higher density leads to more energy captured per unit area.
How do I measure wind speed for this calculator?
Measure wind speed at the turbine hub height using an anemometer, ensuring accurate data for calculations.
What is the power-law profile in wind energy?
The power-law profile is a model used to estimate wind speeds at different heights above ground level based on surface roughness and wind speed at reference height.
Why is surface roughness important for wind power density calculations?
Surface roughness affects how wind speed changes with height, influencing the accuracy of wind power density estimates.
How can I use this calculator to evaluate a potential wind farm site?
Input local air density and measured wind speeds into the calculator to determine the wind power density, helping assess the feasibility of establishing a wind farm.
Results are for informational purposes only and do not constitute professional advice.