The blade length of small wind turbines varies depending on the specific small wind turbine and design conditions, and is determined by the following parameters:
Rated power of generator (Kw),
Rated wind speed (m/s),
Rated speed of impeller (rpm)
Wind turbine efficiency (Cp value),
Impeller design tip speed ratio (lambda),
Select the aerodynamic performance of the airfoil,
Air density Kg/m3,
Altitude.
2. Length of common small wind turbine blade for homes:
Small wind turbine blade for homes (1kw-100kW or less).
The blade length is usually 1.5-10.0 meters, suitable for household or small facility power supply, etc.
Medium sized wind turbine blades (100Kw-1Mw).
The blade length is usually 10-27 meters, suitable for power supply in remote areas, farms, or commercial facilities.
3. Mainstream materials:
Fiberglass reinforced plastic (GFRP):
Advantages: low cost, corrosion resistance and aging resistance, glass fiber reinforced materials, PVC foam and balsa wood are used as sandwich structure core materials, which are the mainstream materials for small wind turbine blade for homes at present.
Application: Covering over 80% of small wind turbine blade for homes with fiberglass composite materials.
Metal materials (aluminum alloy/steel):
Advantages: Aluminum alloy blades are lightweight and easy to process, steel beams with fiberglass skin blades have high strength.
Limitations: Aluminum alloy cannot achieve variable cross-section design, and the material has poor corrosion resistance, gradually being replaced by fiberglass.
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