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July 2013 www.sname.org/sname/mt (mt notes) Harnessing Magnetostriction continued PTOs were deployed in January 2013 following intensive testing on a hydraulic test stand. During the 3-month deployment, 20 wave events were recorded. Detailed analysis of the hourly aver- age tether load change rate was conducted for the data from a particular storm to validate the depen- dence on wave height. We also were able to validate a strong correlation between predicted output of the PTOs, calculated using the tether loading, and their actual output. Finally, we validated that power was harnessed across all of the wave frequencies present. Future plans As the MWEH has moved from the lab to tank to open water, the technology has performed successfully, with a strong correlation between predicted and actual output. Our ongoing and future technology development activ- ities include generator scale-up, additional prototype deployment, and integration of component technologies to drive additional cost reduction. Prototype systems with will be tested at Isle of Shoals in New Hampshire, together with the University of New Hampshires Center for Ocean Renewable Energy, in 2013-2014.Detailed cost modeling suggests that a utility-scale MWEH array using gen 3 generators, located o the cen- tral Oregon coast, could produce electricity at less than 10 cents/kWh without incentives and without requiring signicant learning curves. We would like to acknowledge the contributions of Professor Jim omson and his team at the Applied Physics Laboratory at the University of Washington to the Lake Washington deployment. We also would like to acknowledge the follow- ing individuals for their contributions to our progress over the past three years: Alison Flatau (University of Maryland); Dominique Roddier and Antoine Peier (Marine Innovation and Technology); Joao Cruz and the Wave Energy team at GL Garrad Hassan; Dallas Meggitt (Sound and Sea Technology); and Jahangir Khan (Powertech Labs). MTBalakrishnan Nair is president and CTO of Oscilla Power, Inc. Rahul Shendure is CEO of Oscilla Power, Inc. LEARN MORE For further information on wave energy or magnetostriction, check out the following resources. A Brief Review of Wave Energy,? by T.W. Thorpe, ETSU-R120, AEA Technology for the UK Department of Trade and Industry (1999) The Future Potential of Wave Power in the United States,? by M. Previsic, RE Vision Consulting for the U.S. Department of Energy (2012) A Review of Magnetostrictive Iron?Gallium Alloys,? by J. Atulasimha and A.B. Flatau, Smart Materials and Structures (2011) Application of the Villari Eect to Electric Power Harvesting,? by X. Zhao and D.G. Lord, Journal Of Applied Physics (2006) The MWEH generator testing has validated the accuracy of OPIs predictive models for achievable ?ux change and power production.