Assessment of Tidal Stream Energy Resources Using a Numerical Model in Southwestern Sea of Korea

Abstract

In this study, tidal stream energy resources of the Southwestern Sea of Korea were assessed using a numerical model, Modelo Hidrodinâmico (MOHID). This numerical model is based on the finite volume method, which allows numerical experiments on estuaries, coasts, and oceans. For the numerical experiment, we used grid data of at least 90 m resolution by applying bathymetry data created by the Korea Institute of Ocean Science & Technology (KIOST) and FES2012 data as a tidal boundary condition. Strong tidal currents occur in the Southwestern Sea of Korea due to the characteristics of the tidal systems of the West Sea and the South Sea, and the topographical characteristics of a Ria coast. These characteristics were appropriately reproduced by the numerical experiment. Accordingly, the average and maximum tidal currents calculated by the numerical model were used in the assessment. Two regions, Jangjuk and Maenggol-Geocha, were selected as the candidate areas for tidal stream energy development. In addition, the amounts of tidal stream energy resources were evaluated using geographical information system-based spatial analysis by applying the tidal current, depth data, and area of each region. The resource amounts were estimated to be 4,841 MW, with 5,743 tidal stream energy converters (TECs) for Jangjuk, and 3,497 MW, with 3,676 TECs for Maenggol-Geocha.