MERMAID Report ICOE 2014

Neptune 3 Showcase

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.

Neptune 3 Showcase P. A. Energy CaptureGet 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.

Neptune 3 Showcase Point Absorber Review

Neptune 3 Built: North VancouverDeployment 2015Keats Island B.C., Canada

Neptune 3 Showcase Deployment

Mermaid P. A. FRAMEWORK

Constrains P. A. to move verticallySupports PTO above water in airIs a vessel under Transport Canada regulationsWeighs 12,000 kg (Framework)P. A. weighs 3,500 kg

Neptune 3 Showcase Framework 1 of 2

Neptune 3 Showcase Framework 2 of 2Mermaid Tidal Compensator

Mechatronic automatic system with fail safes

Winch above water moves frameworkrelative to tidal changes (5 m tides)

Result = rigid resistance for P.A. to work against at any tide level

Mermaid PTOProvides 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

Neptune 3 Showcase Generator 1 of 2Mermaid GeneratorCustom designHandmade coils 3 phase AC generator48 inch diameterHandles variable RPM from PTOActs as flywheel to system

Neptune 3 Showcase Generator 2 of 2Mermaid GeneratorOperation

From approx. 1 m waves

409 Volts (single phase) @ 89 RPM

Neptune 3 Showcase LCOE intro1 year = 8,760 HoursGet complete LCOE spreadsheet at mermaidpower.comBetz limit for turbines = 59%

Neptune 3 ShowcaseThank you