The Philippines, being an archipelagic country, is well known for its relatively strong and persistent currents in its straits and channels. Harnessing these strong currents for tidal in-stream energy will greatly help reduce the dependency of the country to imported oil for power generation. The developed energy potential (EP) metric was validated using sites identified by the Philippines' Department of Energy (DOE) as having high potential for ocean tidal energy. This metric provides a less complex methodology with acceptable accuracy for tidal instream resource assessment that makes use of tide height difference at the boundaries of a channel. Using this enables geographic information system (GIS) based data to increase turnaround time for site suitability, technology matching, and feasibility studies for ocean renewable energy installations.
A preliminary tidal in-stream resource assessment is conducted for four sites in the Philippines. A review of available baseline data is done. Said data reviewed include: simulated tidal current velocities calibrated with actual measurements over a month period; simulated tidal in-stream energy density; bathymetry of the region; proximity to grid infrastructure; presence of protected areas, marine sanctuary and recreational areas; navigational routes and historical seismological data. Decision making procedures for the selection of an appropriate site and location using multi-attribute decision analysis (MDA) are outlined. Recommendations for additional data to improve the site selection process are also provided.
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