Ideal Size for a Small Wind Turbine System?

Calculating Turbine Capacity

When sizing a small wind turbine system, the ideal size is often determined by calculating the turbine’s horsepower (hp) based on the available wind speed and the desired electrical output. A general rule of thumb is to use a turbine with a capacity of 5-10 hp per kilowatt (kW) of electrical output. For example, a 2 kW turbine would require a capacity of 10-20 hp.

Power Curve and Rotor Diameter

The power curve of a wind turbine is a crucial factor in determining its performance and capacity. A higher power curve indicates a more efficient turbine that can capture more energy from the wind. The rotor diameter of the turbine is also a critical factor, as it affects the turbine’s ability to capture wind energy. A larger rotor diameter typically results in a higher capacity turbine, but also increases the visual impact and noise level.

Choosing the Right Turbine

When selecting a small wind turbine system, it’s essential to choose a turbine that meets the specific needs of the application. Factors to consider include the available wind speed, the desired electrical output, and the size and weight of the turbine. For example, a turbine with a 2 kW capacity and a 10 hp rating might be suitable for a small off-grid application with moderate wind speeds. However, a turbine with a 5 kW capacity and a 30 hp rating might be more suitable for a larger application with higher wind speeds.