Application of offshore wind turbines (OWT) due to relatively clean and local energy production is increasing recentlyconsequently It is obvious in near future wind energy will get significant portion of man produced energy. One of the most important issues and updates in design of these structures is correct analysis and increasing the accuracy of the analysis so that in addition to considering efficiency and stability of structure. On the other hand, fluid and structure interaction is the most complicated issues foraccurateanalyzing of OWT. In this study, a 5 MBoffshore wind turbine located ona spar type substructure and mooredby three weighted catenary cables is investigated. Different kinds of load combinations such as wind, current, wave, dead and live loads and earthquake loading applied to OWT and structure responses have been investigated. Next step critical load combination was asset. Finally according to calculations, the most critical load combination for OWT was combination of seismic loads and specific portion of live and dead loads.
Department of Maritime Engineering, Amirkabir University of Technology, Tehran, Iran
Ocean Thermal Energy Conversion (OTEC) is a clean marine renewable energy using temperature difference between the sea surface and the deep ocean to rotate a generator to produce electrical energy. As Indonesia is an equatorial country located at latitudes less than 20 degrees covered by 77 % ocean, thousand islands, strain and many difference of topography, OTEC is very compatible build in Indonesian. This paper discussed on performance of 10 MW plant closed cycle of OTEC to be applied in Morotai Island North-Maluku, Indonesia. The working fluid used was pure ammonia with flow rate was assumed 275 kg/s. Simulation results show The surface and deep seawater flow rates were founded 27500 and 29000 kg/sec.
Ocean and Aerospace Research Institute, Indonesia
Departement of Aeronautic, Automotive and Ocean Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Malaysia
The paper presents a study of slamming loads prediction on submarine pressure hull through combination results between numerical analysis and a hydro-elastic submarine model test. This prediction of dynamic loads is very useful since the loads may occur when a submarine in an emergency situation has to sail or arise quickly to surface rough sea. The numerical simulation was conducted by applying the linear 2 - D strip theory to obtain response of the submarine motion and relative velocity to sea surface. Based on this numerical results slamming loads were predicted by conducting a fall - test on a submarine hydro-elastic model in the water tank. The amplitude of slamming load obtained from this test compared with the results from the method of Statovy & Chuang for predicting impact pressures. The results of test measurements from the tank test show a good agreement with the impact pressure method.
Center of Technology for Maritime Industrial Engineering, Agency for the Assessment and Application of Technology (BPPT), Indonesia
Laboratory for Hydrodynamics Technology, Agency for the Assessment and Application of Technology (BPPT), Indonesia
Post Graduate Student, Marine Engineering, Institute Technology Sepuluh Nopember Surabaya, Indonesia
Department of Mechanical Engineering, Muhammadiyah University, Sidoarjo, Indonesia
