A Test-Bed Design Characterization of Tidal Turbine Flows TEAM MEMBERS: Richard L. Smith 1 (SM) Paul E. Arnold 1 (SM) Eric Martin 2 Richard Peale 2 Patrick Bates 2 Jacob Folz 2 Russell Dunn 2 Scott Lessard 2

Tidal Current Energy Western Passage Castine Harbor/ Bagaduce Narrows POTENTIAL SITES This is a Great Opportunity for University of Maine & Maine Maritime Academy to Capitalize on Maine’s Natural Resources in Relation to Renewable Energy. Projected Tidal Turbine Farm Maine Has One of the Largest Tidal Energy Flows in the World. Bagaduce Narrows – up to 6 knots Western Passage – up to 8 knots Potential Power From Flows on the Order of Giga-watts. Predictable Power Generation

Project Initiative & Development Characterize Performance and Efficiency Maps for Standard Turbine Types (Axial, Ducted, Cross Flow) University of Maine & Maine Maritime Academy are Working to Produce and Use the Tidal Turbine Test Bed with the Ultimate Goal of Providing Baseline Data for the Tidal Turbine Industry. Develop a Set of Baseline Tidal Turbine Designs to: Characterize the Interaction Effects of Tidal Turbine Arrays (How to Lay Out the Tidal Turbine Farm) Characterize the Downstream Turbulent Wake Flow for Environmental and Geophysical Impact

Rapid Turbine Development OpenProp Code 3D Rapid Prototyping Turbine Test Bed

Tidal Turbine Test Bed 6 Axis Dynamometer Power Instrumentation and Drive Train Strut Housing Nacelle

Dynamometer & Instrumentation Drive Train DC Stepper Motor Linear Bearings 100 pulse/rev Rotary Encoder Stainless Steel Chain w/ Nylon Sprocket

Tow Tank Testing 100’ x 8’ x 40” Deep Tow Tank Tested 3 Flow Speeds, with 5 Different Torsion Loads for Each Speed

Turbine Test Data: Raw Data

Turbine Test Data: Dimensional Performance

Turbine Test Data: Non Dimensional Performance Tip Speed Ratio:Power Coefficient:

Conclusions: A Turbine Test Bed was: Designed Fabricated Tested & Successfully Demonstrated Measurement Capabilities