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

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

What is Engineering?

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

What is Engineering? Useful Things Stuff convert

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

What is Engineering?

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

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

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

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

Examples

Examples

Examples

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…

Modern Mechanical Engineering

THE FUTURE: ALTERNATIVE ENERGY

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

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

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

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)

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

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

Global Oil Production & Demand

Energy Consumption

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!

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

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

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

Solar Power Semiconductor (Silicon)

Hydrogen from Renewables DOE/EPA, 2005

Pushing the Envelope…

MEMS Micro-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

MEMS Micro-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!

How Small is Small?

How Small is Small? 200 People

How Small is Small? 650,000 Cans of Soda

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

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

Tire Pressure Sensors

Cochlear Implants

Cochlear Implant

Micromachines

Micromachines

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!

Lesson Overview MST@MSU ME 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?

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

Popsicle Stick Slingshot 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.

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

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

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

Lesson 7 Activity Energy and Work ENERGY & WORK Objective TBD

CO2 Propelled Boat PROPULSION Lesson 8 Activity Objective Create a CO2 propelled boat that travels the greatest distance in the minimum amount of time.

CO2 Propelled Boat PROPULSION Lesson 8 Activity Objective Create a CO2 propelled boat that travels the greatest distance in the minimum amount of time.

Electromechanical Systems Lesson 9 Activity Electric Motor Electromechanical Systems Objective Create a CO2 propelled boat that travels the greatest distance in the minimum amount of time.