1. Team 7

2.  Stephanie Beaton  Keith Gillis  Mark Larade  Eric Sharp  Yves Sharp  Supervisor: ◦ Dr. Marek Kujath 2

3.  Demonstrate the ability to generate electrical power from ocean waves  Design and test a device in real world conditions  Evaluate the success of the device 3

4.  Final Design  Simulation  Testing ◦ Results  Analysis ◦ Scalability ◦ Efficiency ◦ Budget  Conclusions  Questions 4

5.  Buoy Action ◦ Power Generating Buoy & Foam Base ◦ Return Buoy ◦ Moorings Design SimulationTestingAnalysisConclusions 5

6.  Power Generating Buoy (Inside) ◦ Main Pulley ◦ Generator Design SimulationTestingAnalysisConclusions 6

7.  Power Generating Buoy (Inside) ◦ Generator ◦ Pulley Design SimulationTestingAnalysisConclusions 7

8.  Drive Train ◦ Main Pulley ◦ Shaft ◦ Rope Design SimulationTestingAnalysisConclusions 8

9.  Drive Train ◦ Pulley ◦ Rope Design SimulationTestingAnalysisConclusions 9

10.  Electrical Generation and Transmission ◦ Multi-meters ◦ Light Bulbs Design SimulationTestingAnalysisConclusions 10

11.  Working Model Overview ◦ 2D Dynamic Model ◦ Inputs: Wave Frequency, Wave Height, Wave Drag Wind Force, Return Force, Return Drag ◦ Wave Motion Modeled Using an Actuator: - wave height and sin(2*wave frequency*π*time) ◦ Illustrated the motion of device and influence of wind on the operation Design SimulationTestingAnalysisConclusions 11

12.  Working Model Results ◦ Limitations - Main buoy constrained - Unable to specify rope diameter - Graphical display ◦ Ideal placement of two buoys when testing on open water Design SimulationTestingAnalysisConclusions 12

13.  Blind Bay, NS ◦ 15m from shore ◦ 15m water depth ◦ Below average wave height Design SimulationTestingAnalysisConclusions 13

14.  Initial Leak Testing Design SimulationTestingAnalysisConclusions 14

15.  Buoy set-up  Test 1 Design SimulationTestingAnalysisConclusions 15

16.  Electrical Measurements ◦ Marine cable run from boat to buoy ◦ Measured amperage, voltage ◦ Lit light bulb Design SimulationTestingAnalysisConclusions 16

17.  Motion in Ocean Waves  Return Buoy  Functioned as expected  Cable Tangling  Not observed  Power Generating Buoy  Needed added buoyancy to follow low amplitude waves  Power Produced Design SimulationTestingAnalysisConclusions 17

18.  Demonstration – On Shore Pull Test Design SimulationTestingAnalysisConclusions 18

19. Design SimulationTestingAnalysisConclusions 19

20. Design SimulationTestingAnalysisConclusions 20

21.  Efficiency ◦ From wave to buoy Design SimulationTestingAnalysisConclusions 21

22.  Scalability ◦ Froude Number Design SimulationTestingAnalysisConclusions 22 Ref: Wave Energy: a design challenge (Ronald Shaw)

23.  How big a buoy to get a kW  5.5m ∅  How many buoys to power a house?  40 Design SimulationTestingAnalysisConclusions 23

24.  Budget ◦ Under budget ◦ Some components were free ◦ Locally sourced components Design SimulationTestingAnalysisConclusions AllottedSpent $1300∼$600 24

25.  Comparison to Requirements Design RequirementsActual Performance Power production 50 W ~ 50 W; dependant on wave height Size2.0m x 1.5m x 1.5m≥ 0.5m x 0.5m x 0.40m WeightAll Components 230 kg170 kg (estimated) SurvivabilityOcean Environment Environmental Impact Limited 25 Design SimulationTestingAnalysisConclusions

26.  Strengths ◦ Adaptable to different wave heights and tides ◦ Design uses off the shelf components ◦ Simple construction ◦ Works well mechanically Design SimulationTestingAnalysisConclusions 26

27.  Weaknesses ◦ Difficult testing ◦ Marine growth will require periodic cleaning ◦ Larger waves needed ◦ Intermittent power production ◦ Low efficiency Design SimulationTestingAnalysisConclusions 27

28.  Possible Design Changes ◦ Use non-stretching rope for better response ◦ Placing handles on the buoy ◦ Test in tropical location ◦ Place generator on ocean floor ◦ Consider more closely the effects of friction Design SimulationTestingAnalysisConclusions 28

29.  Dr. Kujath (Supervisor)  Dr. Hubbard (Coordinator)  Mechanical Technicians -Albert, Angus, Greg, Peter  Glyn Sharp  Sponsor: ◦ Shell 29