1. ABE Principles: Machine Systems Tony Grift, PhD Dept. of Agricultural & Biological Engineering

2. Main topics Fluid power –Fundamentals of pressure and flow –Calculation of Pressure, Force/work/Power, flow rate, piston speed –Implementations Pumps/Motors/Valves/Actuators Engines –Working Spark/Combustion Ignition, engine components –Power calculations Air cannon –Adiabatic expansion theory –Ballistic model Machinery –Fertilizer application –Combine harvesting

3. Labs Fluid Power 1.Cavitation/aeration 2.Pressure relief valve characterization 3.Directional control valves 1.Engines 1.Dynamometer lab 2.Cannon 1.Data collection and Excel spreadsheet 2.Solving Differential Equations, link Excel and Matlab 3.Machines 1.Fertilizer application lab 2.Corn harvesting lab

4. Fluid Power Labs

5. Computer homework using FluidSim

6. Week 4: Air cannon

7. 7 Cannon theory: Isochoric (const. volume) Isothermal (const. temperature) Adiabatic (no heat exchange with environment: fast processes!)

8. Cannon lab1a: Measure air time of various projectiles

9. Cannon lab1b: Excel spreadsheet includes adiabatic expansion model

10. Cannon lab 2: Couple Excel and MatLab, solve ballistic equations

11. Corn harvesting lab: Students get to drive the machine!

12. Score histogram of ABE223 2012-2014: 50% =A, 33% =B, 16.6% <= C 12 AA+ BCDF