Wind turbine challenge slides

1. Wind turbine challenge slides

2. Now, I stop talking… You have the tools, now it is time to use them!

3. A basic wind turbine design

4. Deign Envelope 6” Cube must enclose the blade 6” 6” support plate 3.5” 3.5” Support structure goes here 17” (from bottom of base plate to top of support plate) Base plate 11.75” 11.75”

5. Design Challenges • Best poster presentation (judged by class)You will make a poster presentation describing your design and the results of its performance. Tips for poster presentations can be found in the lecture notes on presentations. • Best managed project Develop PERT and/or Gantt charts at the beginning of the project, and track changes throughout the project. You will be evaluated on the completeness of your records, not on the differences between the beginning and final reports. In fact, I would be surprised if they are the same!

6. Most thoroughly researched project A through literature review with citations and original primary literature sources. • Highest Power Generated Your wind turbine will be tested at a wind speed of 25 mph and at various electrical loads. The higher the power output, the better. • Lowest windspeed operation before stall Your wind turbine will be tested at a falling wind speed until the measured power drops to 0.1W. • Best directional operation Your wind turbine will be tested on a turntable and the angle at wich measured power drops to 0.1W will be recorded. • Best Presentation on the design and its performance (judged by class)You will make a 15 minute presentation describing your design and the results of its performance. (See the guidelines for the presentation below). This will also be graded according to the presentation rubric

7. Best high speed operation (warning! This might be dangerous!) Your wind turbine will be tested at a high wind speed to see if it continues to operate without catastrophic failure. Parking blades is an allowed strategy. This simulates the effects of hurricanes and severe weather. • Best Stiffness to Weight Ratio Your support tower will be loaded transversely (simulating wind loading), and its deflection will be measured 17 inches above the base of the tower. The less deflection (stiffer), the better. Your structure will be weighed. The lighter, the better. • Most Innovative Design (judged by class) Innovation and creativity used in your design will be judged by your peers in a two vote per person system. • Best Engineering report You need to document your design and performance results in a written report. Your report will be assessed on the quality and completeness of your documentation. (See the guidelines for writing the report below and the rubric that describes how your report will be evaluated).

8. Hierarchal Design Breakdown • Designing and fabricating the turbine rotor blades • Selecting or Design & Fabricating a motor • Designing and fabricating the support tower • Determining the power output by your turbine • Measuring the stiffness of your support tower • This is by no means an all-inclusive list. In fact, you wind turbine might not have blades or a motor at all…

9. How do we make a wind turbine better?

10. “better”= think: time | scope | cost Easier to manufacture Lower cost to make More durable Lower stall speed More efficient conversion

11. How do we make a wind turbine better? Make better blades What Does “Make better blades” mean?

12. Some Ideas to get you started…

13. Make Incremental Improvements

14. Biology can provide engineers inspiration! Large vortices are formed behind the troughs along the leading edge whereas flow behind the tubercles forms straight streamlines. The effect of these flow patterns induced by the tubercles is to delay stall. (Credit: E. Paterson) http://www.sciencedaily.com

15. Develop a Radical Blade Design http://www.kids.esdb.bg/wind.html http://www.fundamentalform.com/html/vawt_plans.html http://inhabitat.com/energy-ball-by-home-energy/ http://gcaptain.com/the-most-interesting-wind-turbine-designs/ And 11 more interesting designs • http://www.livescience.com/9592-eggbeater-power-future.html

16. Eliminate the blades completely • http://inhabitat.com/windbelt-innovative-generator-to-bring-cheap-wind-power-to-third-world/ • http://www.freeonplate.com/how-to-build-cheap-windbelt-generator-using-vhs-tape/ • http://hackedgadgets.com/2008/04/30/windbelt-micro-power-generator-built-from-hard-drive-voice-coil/ http://www.ewi.tudelft.nl/en/current/ewicon/ More At http://buildipedia.com/aec-pros/engineering-news/future-improvements-in-wind-power

17. Make the tower part of the generator structure http://atelierdna.com/masdarwindstalk/

18. Develop a New Motor • Switched Reluctance Generator • http://cmrt.centrale-marseille.fr/cpi/ever09/documents/papers/re6/EVER09-paper-199.pdf • A Floppy Drive based generator http://www.instructables.com/id/How-to-build-floppy-drive-wind-generator/ • Axial Flux Linear Alternator http://www.windenergy.nl/website/files/artikelen/AXIAL_FLUX_HowItWorks.pdf http://www.youtube.com/watch?v=3hdtb_3kO48

19. Develop a power meter Our current power meter is all analog, and costs over $100 to build. Can you build one that: • Uses microntrollers to reduce cost • Outputs to a laptop using Python and an Arduino