바이오매스 생산을 위한 외해 해조류양식시설 동적특성 해석

Abstract

Abstract

Environment-friendly and sustainable seaweed biomass energy is under the spotlight as the future of renewable energy. However, seaweed culture primarily depends on inshore and research of offshore culture system is still in insufficient step. A seaweed culture technology for biomass production is required engineering and systematic study beyond the conventional empirical approach. In this study, dynamic characteristics of seaweed culture facility for biomass production were analyzed by numerical simulation. To achieve the objective, Hydrodynamic simulation program, ANSYS-AQWA was used to numerical analysis. In order to analyze the dynamic characteristic of seaweed culture facility, the following approaches were performed. Firstly, a seaweed culture facility model was selected to rectangular frame type. The target model of seaweed culture facility consists of a frame part, culturing part and the mooring system was applied the compliant mooring system to reduce drift effect. Secondly, in order to analyze the characteristic of the dynamic response, RAO (response amplitude operator) was calculated. The RAO was calculated from the frequency-domain analysis and the characteristics of translational motion mode were investigated through comparing the RAO value by frequency components. Finally, time domain analysis was carried out to evaluate the response by wave load. The wave load in the numerical analysis was based on the JONSWAP spectrum and Airy wave. The mooring performance was evaluated by comparing the time series response obtained through the mooring variables.