Walk-In

1. Walk-In • Take out notebook, folder, pencil box. • Take out AGENDA. • Copy the agenda for this week. KidWind Project | www.kidwind.org

2. Energy Tests • Feedback • Celebrations • Give your test back to Mrs. Ryan by putting it into the basket. KidWind Project | www.kidwind.org

3. Walk-In • Take out notebook, folder, pencil box. • Answer in sentences: Give three reasons why wind is a good source of energy. KidWind Project | www.kidwind.org

4. Answer • It is unlimited – we will never run out! • It is clean – no pollution! • It can be used to turn gears in a mill, or to generate electricity. KidWind Project | www.kidwind.org

5. Wind Turbine How-To Video • Observe the basics of creating a wind turbine and testing it. KidWind Project | www.kidwind.org

6. Walk-In • Take out: notebook,, folder, pencil box. • Copy the question and answer in sentences: • Explain how a wind turbine would produce the electromagnetic effect. KidWind Project | www.kidwind.org

7. Some Answers… • Wind turns the blades of the turbine, which should turn the shaft, which has magnets wrapped in copper wire attached, so a current is produced in the wire. KidWind Project | www.kidwind.org

8. Walk-In • Take out notebook, folder, pencil box. • Question: • State two things you could change about your wind turbine, to test how much electricity is generated. KidWind Project | www.kidwind.org

9. Some Answers… • Number of blades • What blades are made out of • Shape of blades • Angle blades are tilted at • Distance from fan • Power of fan (how much wind it puts out) KidWind Project | www.kidwind.org

10. Walk-In • Take out notebook, folder, pencil box. • Question: • What are some possible causes of your wind turbine not generating an electric current? KidWind Project | www.kidwind.org

11. Troubleshooting • Gears have slipped – tighten the slider that holds the gears in place or get tape to keep shaft from moving forward. • Black or red electric leads (wires) have gotten disconnected. • Voltmeter is not on. • Voltmeter is not set to 20V. KidWind Project | www.kidwind.org

12. Wind Turbines

13. Can wind really make a difference? • Watch this story about William Kamkwamba in Africa, and how he became a hero by using science and engineering! • Discuss with your group the things that you think are needed to make a wind turbine to generate electricity. KidWind Project | www.kidwind.org

14. Shaft turning… • We’ve learned that to generate electricity, you have to turn the blades, so the shaft turns too. • When a wind turbine or windmill turns, do you see the base moving?!?? • Where must the magnets and copper wire be?! KidWind Project | www.kidwind.org

16. How a Wind Turbine Works • Wind spins the blades. • The rotor (middle hub) attached to the blades turns. • The rotor contains magnets wrapped in copper wire. • The electromagnetic effect induces an electric current. KidWind Project | www.kidwind.org

17. Building Wind Turbines • We have the equipment to make wind turbines and to test them for the amount of electricity they generate! • We will be designing and testing turbine blades to OPTIMIZE our design. KidWind Project | www.kidwind.org

18. Designing Our Wind Turbines

19. Equipment for Wind Turbines • Our wind turbines will consist of • Hub • Arm • Blade • Rotor • Turbine • Let’s get acquainted with these materials! KidWind Project | www.kidwind.org

20. Examine materials and take notes. • B – Line up on the TILE, take ONE of each item in the bin, bring to table. • D – Line up AT FRONT, get safety glasses for everyone at your table. THESE ARE EXPENSIVE SO BE CAREFUL WITH THEM! KidWind Project | www.kidwind.org

21. Copy this vocabulary chart and fill it in:

22. Video Clip • Advantages of wind power KidWind Project | www.kidwind.org

23. Wind Turbine Groups

24. Our Wind Turbine Experiment • Your group will represent a wind turbine company, trying to design and test the best wind turbine design possible! • How would we know what “best” is? KidWind Project | www.kidwind.org

25. The best designed turbine will… • Produce the highest amount of electricity. • Evidence: Which one has the highest amount of volts on the voltmeter? KidWind Project | www.kidwind.org

26. Wind Turbine Company • Form a group of 3. • Sit together. • Come up with a company name. • Write your names, baggie label # and company name on your sheet. • Each person turns in their own sheet. KidWind Project | www.kidwind.org

27. Today’s work… • Circle the two blades you think will work best. • Make 4 OF EACH OF THE BLADES YOU’VE DECIDED ON. • Test them to see which SHAPE works best. Keep those blades and throw out the other shape. • Then test the # OF BLADES. Make more of the best blade, so you have enough to test. KidWind Project | www.kidwind.org

28. Forming your turbine… • Watch the Hollywood style video for materials and how to put together! KidWind Project | www.kidwind.org

29. Summary

30. Wind Power Advantages • Wind power, as an alternative to burning fossil fuels, is • plentiful (never runs out) • renewable, • widely distributed (found all over the earth!), • clean, produces no greenhouse gas emissions during operation, • uses only a little land since turbine is at the top of a thin pole.

31. Disadvantages • Wind power cons include: • Not all places are windy • Windy places get changes in the wind. • Some people say wind “farms” are ugly. • Can be a danger to birds. • Expensive to build and transport.

32. Today’s goal • Each person sketches 2 blade designs. • Discuss and decide which blade design you will use. • Get cardboard and begin making blades. • Store all blades, dowels, etc. in your group’s baggie. • Put in your period’s tub. KidWind Project | www.kidwind.org

33. Meet William Kamkwamba • Inspiration: William Kamkwamba • http://williamkamkwamba.typepad.com/williamkamkwamba/photos.html Answer the following questions with your group: • Why did William build a wind turbine? • Do you think it worked the first time he tried it? • Why would people try to improve the design of a wind turbine? • What things would something need to consider before starting a project like this? • Remember that the engineering design process starts with ASK and identifying a problem or need. • List as many questions or problems that would inform this work.

34. Changing the Angle of the Blades • Use a yellow 3-D protractor. • Tilt the blade to one angle, measure and record in your chart. • Do three trials with that angle. • Change to a different angle. Do three trials. • Finish your Grand Conclusion, and turn in sheet by end of class. KidWind Project | www.kidwind.org

35. Voltmeter Workaround • Instead of measuring the volts, we will • COUNT THE NUMBER OF TURNS THE TURBINE MAKES IN 30 SECONDS. • To help count, PUT A DOT OR STRIPE on one fan blade, and count how many times it goes by. KidWind Project | www.kidwind.org

36. Today’s work • Finish making enough blades to test both • Part 1 – Shape of Blade And * Part 2 – Number of Blades KidWind Project | www.kidwind.org

37. Today’s goals… • Finalize blade design. • Make blades, attach to hub, test turbine! • WEAR SAFETY GLASSES when working at a wind tower! • If voltmeter problems and you can’t write down numbers, just test out your turbine and see how it works! KidWind Project | www.kidwind.org