Team 7
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
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Stephanie Beaton
Keith Gillis
Mark Larade
Eric Sharp
Yves Sharp
Supervisor:
◦ Dr. Marek Kujath
2
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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
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Final Design
Simulation
Testing
◦ Results

Analysis
◦ Scalability
◦ Efficiency
◦ Budget
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Conclusions
Questions
4
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Buoy Action
◦ Power Generating
Buoy & Foam Base
◦ Return Buoy
◦ Moorings
Design
Simulation
Testing
Analysis
Conclusions
5
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Power Generating Buoy (Inside)
◦ Main Pulley
◦ Generator
Design
Simulation
Testing
Analysis
Conclusions
6
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Power Generating Buoy (Inside)
◦ Generator
◦ Pulley
Design
Simulation
Testing
Analysis
Conclusions
7
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Drive Train
◦ Main Pulley
◦ Shaft
◦ Rope
Design
Simulation
Testing
Analysis
Conclusions
8
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Drive Train
◦ Pulley
◦ Rope
Design
Simulation
Testing
Analysis
Conclusions
9
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Electrical
Generation and
Transmission
◦ Multi-meters
◦ Light Bulbs
Design
Simulation
Testing
Analysis
Conclusions
10
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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
Simulation
Testing
Analysis
Conclusions
11
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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
Simulation
Testing
Analysis
Conclusions
12
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Blind Bay, NS
◦ 15m from
shore
◦ 15m water
depth
◦ Below average
wave height
Design
Simulation
Testing
Analysis
Conclusions
13
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Initial
Leak Testing
Design
Simulation
Testing
Analysis
Conclusions
14
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Buoy set-up

Test 1
Design
Simulation
Testing
Analysis
Conclusions
15
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Electrical
Measurements
◦ Marine cable run
from boat to buoy
◦ Measured
amperage, voltage
◦ Lit light bulb
Design
Simulation
Testing
Analysis
Conclusions
16

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
Simulation
Testing
Analysis
Conclusions
17
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Demonstration – On Shore Pull Test
Design
Simulation
Testing
Analysis
Conclusions
18
Design
Simulation
Testing
Analysis
Conclusions
19
Design
Simulation
Testing
Analysis
Conclusions
20
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Efficiency
◦ From wave to buoy
Design
Simulation
Testing
Analysis
Conclusions
21
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Scalability
◦ Froude Number
Ref: Wave Energy: a design challenge (Ronald Shaw)
Design
Simulation
Testing
Analysis
Conclusions
22
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How big a buoy to get a kW
 5.5m ∅

How many buoys to power a house?
 40
Design
Simulation
Testing
Analysis
Conclusions
23
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Budget
◦ Under budget
◦ Some components were free
◦ Locally sourced components
Allotted
$1300
Design
Simulation
Spent
∼$600
Testing
Analysis
Conclusions
24

Comparison to Requirements
Design Requirements
Power
production
Size
Weight
Survivability
Environmental
Impact
Design
Actual Performance
~ 50 W; dependant on
50 W
wave height
2.0m x 1.5m x 1.5m
≥ 0.5m x 0.5m x 0.40m
All Components 230 kg
170 kg (estimated)
Ocean Environment
Ocean Environment
Limited
Simulation
Testing
Limited
Analysis
Conclusions
25
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Strengths
◦ Adaptable to different wave
heights and tides
◦ Design uses off the shelf
components
◦ Simple construction
◦ Works well mechanically
Design
Simulation
Testing
Analysis
Conclusions
26
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Weaknesses
◦
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◦
◦
Difficult testing
Marine growth will require periodic cleaning
Larger waves needed
Intermittent power production
Low efficiency
Design
Simulation
Testing
Analysis
Conclusions
27
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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
Simulation
Testing
Analysis
Conclusions
28

Dr. Kujath (Supervisor)

Dr. Hubbard (Coordinator)

Mechanical Technicians
-Albert, Angus, Greg, Peter

Glyn Sharp

Sponsor:
◦ Shell
29