1. Neptune 3 Showcase

2. Point Absorber Review
• a floating structure
• absorbs energy from all directions
• converts the motion of the
buoyant top relative to the base
Neptune 3 Showcase – Point Absorber Review
The OPT “Donut on a Stick” is common
example of a point absorber system.

3. Neptune 3 Showcase – P. A. Energy Capture
Get complete wave tank test data at mermaidpower.com
In direct drive system, the P. A. can be dampened to optimize wave energy capture
by automatically increasing / decreasing the amperage load on the generator.

4. Neptune 3 Showcase – Point Absorber Review
Neptune 3
Built: North Vancouver
Deployment 2015
Keats Island B.C., Canada

5. Neptune 3 Showcase – Deployment

6. Mermaid P. A. FRAMEWORK
• Constrains P. A. to move vertically
• Supports PTO above water in air
• Is a vessel under
Transport Canada regulations
• Weighs 12,000 kg (Framework)
• P. A. weighs 3,500 kg
Neptune 3 Showcase – Framework 1 of 2

7. Neptune 3 Showcase – Framework 2 of 2
Mermaid Tidal Compensator
• Mechatronic automatic system
with fail safes
• Winch above water moves framework
relative to tidal changes (5 m tides)
• Result = rigid resistance for P.A. to
work against at any tide level

8. Mermaid PTO
• Provides direct drive from P.A.
to Generator
• Delivers power from both
Up & Down stroke of P.A.
• Converts variable
reciprocating motion into
unidirectional rotation motion
Neptune 3 Showcase – PTO

9. Neptune 3 Showcase – Generator 1 of 2
Mermaid Generator
• Custom design
• Handmade coils
• 3 phase AC generator
• 48 inch diameter
• Handles variable RPM
from PTO
• Acts as flywheel to system

10. Neptune 3 Showcase – Generator 2 of 2
Mermaid Generator
Operation
• From approx. 1 m
waves
• 409 Volts
(single phase)
@ 89 RPM

11. Neptune 3 Showcase – LCOE intro
1 year = 8,760 Hours
Get complete LCOE spreadsheet at mermaidpower.com
Betz limit for turbines = 59%

12. Neptune 3 Showcase
Thank you