Wind Turbine Blade Design Joseph Rand The Kidwind Project

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Presentation transcript:

Wind Turbine Blade Design Joseph Rand The Kidwind Project

Many Different Rotors… KidWind Project |

Number of Blades – One Rotor must move more rapidly to capture same amount of wind –Added weight of counterbalance negates some benefits of lighter design –Higher speed means more noise, visual, and wildlife impacts Blades easier to install because entire rotor can be assembled on ground Captures 10% less energy than two blade design Ultimately provide no cost savings

Number of Blades - Two Advantages & disadvantages similar to one blade Need teetering hub and or shock absorbers because of gyroscopic imbalances Capture 5% less energy than three blade designs

Number of Blades - Three Balance of gyroscopic forces Slower rotation –More aesthetic, less noise, fewer bird strikes

Blade Composition Wood Wood –Strong, light weight, cheap, abundant, flexible –Popular on do-it yourself turbines

Blade Composition Metal Steel –Heavy & expensive Aluminum –Lighter-weight and easy to work with –Expensive –Subject to metal fatigue

Blade Construction Fiberglass Lightweight, strong, inexpensive, good fatigue characteristics Most modern large turbines use fiberglass

KidWind Project |

Some Wacky Ideas…

Advanced Classroom Blades Cardboard Tube for twisted blades Airfoil Blades

Wind Turbine Blade Challenge Students perform experiments and design different wind turbine blades Use simple wind turbine models Test one variable while holding others constant Record performance with a multimeter or other load device Goals: Produce the most voltage, pump the most water, lift the most weight –Minimize Drag –Maximize LIFT –Harness the POWER of the wind!

Questions? Joe Rand KidWind Project