Mechanical Engineering?

1. Mechanical Engineering? Jeff Rhoads and Terry Ballinger What is MST @ MSU 2006

2. Outline • What is Engineering? • Intro to Engineering Movie • What is Mechanical Engineering? • Sample ME Topics • Alternative Energy Sources • MEMS • Lesson Overview

3. What is Engineering?

4. What is Engineering? • The application of science & mathematics to design, build, and maintain devices and processes that are useful to humankind.

5. What is Engineering? Useful Things Stuff convert

6. What is Engineering? Useful Things Stuff convert • Matter • Sources of Energy • … • Cars • Air Conditioners • Bridges • Clean Water • … …useful to humankind

7. What is Engineering?

8. What is Mechanical Engineering? Mechanical Energy Non-Mechanical Energy convert

9. What is Mechanical Engineering? Mechanical Energy Non-Mechanical Energy convert • Electrical • Chemical • Thermal • Nuclear • …

10. What is Mechanical Engineering? Mechanical Energy Non-Mechanical Energy convert • Electrical • Chemical • Thermal • Nuclear • … • Potential • Kinetic

11. What is Mechanical Engineering? Mechanical Energy Non-Mechanical Energy convert Conversion involves the design and manufacture of: • Tools • Machines • Engines • …

12. Examples

13. Examples

14. Examples

15. What do ME’s Study? • Mechanics: machines, structures, … • Fluids: aerodynamics, pumps/fans, … • Thermal Sciences: heating/cooling, energy, … • Controls: interface electronics, … • Manufacturing: matl’s handling/processing, … • More…

16. Modern Mechanical Engineering

17. THE FUTURE:ALTERNATIVE ENERGY

18. Alternative Energy - Motivation In the United States… • 2% of the Worlds Oil Reserves

19. Alternative Energy - Motivation In the United States… • 2% of the Worlds Oil Reserves • 8% of World Oil Production

20. Alternative Energy - Motivation In the United States… • 2% of the Worlds Oil Reserves • 8% of World Oil Production • 5% of Worlds Population

21. Alternative Energy - Motivation In the United States… • 2% of the Worlds Oil Reserves • 8% of World Oil Production • 5% of Worlds Population • 31% Total Oil Consumption (2/3 imported)

22. Why Oil? Historical sources of energy: Wood  Coal  Oil/Gas  Nuclear

23. Why Oil? Historical sources of energy: Wood  Coal  Oil/Gas  Nuclear One barrel of oil 12 person-years of manual labor =

24. Global Oil Production & Demand

25. Energy Consumption

26. What Should We Do? • Increase nuclear energy output? • Increase alternative energy output (solar, wind, wave, geothermal, …) • Reduce consumption? • All of the above? • OR: Go back to the caves? We can’t!

27. Alternative Energy Sources… • Nuclear • Hydroelectric • Geothermal • Wind • Biomass, Agricultural Sources, and Waste • Solar • Hydrogen from Renewables

28. Complications…. • Environmental Impact • Cost • Safety • Technology • Will it make a dent?

29. So Why Try…. • Application Specific Energy • Solar Panels • Hydroelectric Power • Hydrogen Powered Cars

30. Solar Power Semiconductor (Silicon)

31. Hydrogen from Renewables DOE/EPA, 2005

32. Pushing the Envelope…

33. MEMSMicro-Electro-Mechanical-Systems • Small devices that integrate electronics, mechanics, and computing • Existing products: sensors for acceleration (air bags), pressure (tires), temperature, ear implants, etc • The future: biotech applications, sorting of stem cells, biohazard sensors, etc

34. MEMSMicro-Electro-Mechanical-Systems • Small devices that integrate electronics, mechanics, and computing • Existing products: sensors for acceleration (air bags), pressure (tires), temperature, ear implants, etc • The future: biotech applications, sorting of stem cells, biohazard sensors, etc This is what I frequently work on!

35. How Small is Small?

36. How Small is Small? 200 People

37. How Small is Small? 650,000 Cans of Soda

38. How Small is Small? 30,000,000 #2 Pencils

39. How Small is Small? >1x1015 MEMS Devices (Quadrillions)

40. Tire Pressure Sensors

41. Cochlear Implants

42. Cochlear Implant

43. Micromachines

44. Micromachines

45. What Else Does the Future Hold? • Nanotechnology – very small machines (one-billionth of a meter!) • Biotech Advances • ‘Space Age’ Materials • More – just use your imagination!

46. MST@MSU ME Lesson Overview What is Mechanical Engineering? Design: A Creative Problem-Solving Process (Straw Structure) Dynamics: Gravity is Holding us Down! (Popsicle Stick Slingshot) Why Things Float and Fly: Buoyancy and Aerodynamics (Airplanes) Out of Control: The Need for Control System (Popsicle Stick Slingshot) Manufacturing Madness (Assembly Line) Energy and Work: Sources and Conversion (?) Propulsion: How Fast Can You Go? (CO2 Propelled Boat) Electromechanical Systems (Electric Motor) Mechanical Vibrations: What’s Shaking?

47. Lesson 2 Activity Straw Structure Objective Create a structure that will hold a bottle of water as high as possible. DESIGN

48. Lesson 3-5 Activity Popsicle Stick Slingshot Objective Create a ground level launching slingshot that will propel a plastic ball as far as possible. CONTROLS / DYNAMICS Objective Calibrate the slingshot from Lesson 3 to accurately propel a plastic ball to a target at an arbitrary distance.

49. Lesson 4 Activity Airplanes! BOUYANCY & AERODYNAMICS Objective Design a set of paper airplanes which will fly the furthest/stay aloft the longest

50. Lesson 6 Activity Assembly Line MANUFACTURING Objective Create an assembly line that will produce eight bean-filled fish as quickly as possible.