This abstract presents an analysis of an attenuator-type Wave Energy Converter (WEC) with 40 Os- cillating Water Column (OWC) chambers for the extraction of wave energy. Linearized potential flow calculations are made in the frequency-domain using WAMIT [8]. An equivalent linearized damping coefficient to represent the air turbine Power Take Off (PTO) system is found for each condition by iterating to find the consistent response-damping pair for a given frequency and incident wave ampli- tude. The absorbed power is estimated based on the pressure in each chamber and the PTO damping coefficient. The calculations are compared to model-scale measurements in a slack-moored condition, and generally good agreement is found. Work is in progress to move the solution to the time-domain and include a more sophisticated PTO model which includes nonlinear and air compressability effects in the turbine.
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