Analisis Hidrodinamika pada Oscillating Water Column (OWC) Tipe U dengan Menggunakan Pemodelan Waktu (Time Domain Modelling)

Abstract

Currently, the main source of energy in Indonesia still relies on non-renewable energy sources derived from fossil fuels. Fossil-based energy sources pose a major problem because fossil fuels are non-renewable and their reserves are depleting every year. This indirectly threatens the availability of electricity in Indonesia. One of the alternative energy sources for power generation available in Indonesia is wave energy. There are many concepts and technologies related to wave power generation, such as the Oscillating Water Column (OWC) type of Wave Energy Converter (WEC) device which has been widely researched, tested, reliable, and relatively more mature in terms of technology. This research focuses on the effect of hydrodynamic coefficients on the parameters of forced oscillation (with amplitude and frequency variations) and also on how to know the validity of linear superposition theory. The method used is the time-domain modeling method with the assumption of linear superposition theory. The software used in the research is OpenFOAM and wave2Foam. The results of this study show that frequency variation greatly affects the hydrodynamic coefficient while amplitude variation does not greatly affect the magnitude of the hydrodynamic coefficient and linear superposition theory is declared valid because the internal water level elevation obtained from the time domain modeling method is close to the same magnitude as the wave2Foam simulation.