1. Turbinator Technologies Concept Design Review Group C4: Turbinator Technologies April 22 nd and 24 th, 2008 Bryan Delaney, Robert Herzog, John Larson, Michael O’Brien, and Alex Vossler

2. Turbinator Technologies Purpose Portable source of power (20 W at 12 V for an average wind of 15 mph) Portable source of power (20 W at 12 V for an average wind of 15 mph) Disaster relief Disaster relief –Power a radio, phone and/or light –Reusable –Inexpensive Other Applications Other Applications

3. Turbinator Technologies Concept Design Requirements

4. Turbinator Technologies Concept 3 Blade Horizontal Wind Turbine 3 Blade Horizontal Wind Turbine –50% more efficient than vertical wind turbine –Smaller and more portable than a vertical wind turbine

5. Turbinator Technologies Weight Rationale: One person can carry on back Rationale: One person can carry on back Entire system weighs 47.8 lbs Entire system weighs 47.8 lbs

6. Turbinator Technologies Size 4 Primary Subsystems 4 Primary Subsystems –Nacelle –Blades –Poles –Base No piece longer than 30” No piece longer than 30”

7. Turbinator Technologies

8. Tip-Over Prevention  Trade Study Results  User-supplied weight  Two 60 lbs sandbags  Withstand > 28 lb f  Expected at 30 mph  Trade Study Results  Prototype - Withstood 28 mph gusts  Ratchet straps for triangulation

9. Turbinator Technologies Electrodynamic Brake User-operated “kill” switch User-operated “kill” switch Shorts generator across terminals Shorts generator across terminals Prevents potential injury and device failure Prevents potential injury and device failure

10. Turbinator Technologies Band brake actuated by DC motor Band brake actuated by DC motor Prototype – push button activated Prototype – push button activated Generator limited to 3A continuous duty Generator limited to 3A continuous duty –Turbine limited to 900 RPM Ensures safety Ensures safety Mechanical Brake

11. Turbinator Technologies Band Brake Operation

12. Turbinator Technologies Blade Design Modified Blade Element Theory Modified Blade Element Theory –Assumes axial induction factors to be negligible Power:Thrust: Blade Element Geometry

13. Turbinator Technologies Power vs. Blade Radius @ 15 mph wind

14. Turbinator Technologies Blade Design Decisions E387 Airfoil profile E387 Airfoil profile 24” radius Blades 24” radius Blades Twist 16.7 o from root to tip Twist 16.7 o from root to tip Cord taper from 4” at root to 1” at tip Cord taper from 4” at root to 1” at tip Source: National Renewable Energy Laboratory

15. Turbinator Technologies Blade Development PVC PVC Foam and Fiberglass Foam and Fiberglass Outsource Air-X Carbon Fiber Blades Outsource Air-X Carbon Fiber Blades

16. Turbinator Technologies Performance Testing

17. Turbinator Technologies Prototype Performance P = ½ηρV 3

18. Turbinator Technologies Prototype Goals Power Extraction Efficiency: 6% Power Extraction Efficiency: 6% Tip over force: > 28 lbs Tip over force: > 28 lbs Weight: < 50 lbs Weight: < 50 lbs Assembly Time: < 60 min Assembly Time: < 60 min Embedded Intelligence: Embedded Intelligence: –Display RPM –Display Voltage –Display Current BONUS: Brake BONUS: Brake 17% Average Measured 17% Average Measured Tested over full range. Tested over full range. 47.8 lbs 47.8 lbs 22 minutes 22 minutes Intelligence: Intelligence: –RPM with Microcontroller –Voltage/Current Displayed Electrical and Mechanical Brake Installed Electrical and Mechanical Brake Installed

19. Turbinator Technologies Conclusion Feasible Design Feasible Design –Prototype met all of the performance requirements Final Product Improvements Final Product Improvements –Weatherproof nacelle –Automated mechanical brake –Lighter weight materials –Packaging –Mold Blades or Outsource

20. Turbinator Technologies Questions ?

21. Turbinator Technologies Blade Twist Power vs. Blade RadiusPitch Angle vs. Blade Radius