Preliminary Investigation for Feasibility of Wave Energy Converters and the Surrounding Sea as Test-site for Marine Equipment

Abstract

Of late, demand for sites and platforms to test the performance of marine equipment and underwater and surface robots during the development process has been increasing in South Korea. The Korea Research Institute of Ships and Ocean Engineering(KRISO) has performed unit performance and overall performance tests at the Jangmok wharf in Geoje-si, where the South Sea Research Institute (SSRI) of the Korea Institute of Ocean Science and Technology (KIOST) is located, and engaged in the development of a deep-sea remotely operated vehicle (ROV), Hemire, and an autonomous underwater vehicle (AUV), ISiMI 100 (Baek et al., 2008; Jun et al., 2009). Tests for the location estimation performance of underwater vehicles were also performed in the inland environment of Jangseongho in Jeollanam-do (Choi et al., 2019a). Defense industry companies carried out experiments for motion characteristic modeling of AUVs for underwater reconnaissance and hydrodynamic coefficient adjustment and experiments for performance verification in the real sea at the South Sea Research Institute wharf (Park et al., 2015; Lee et al., 2015). Other experiments, mostly for the development performance verification of individual maritime unmanned vehicles, are being carried out in the coastal sea of the Jinhae Naval Academy in Gyeongsangnam-do, the Korea Maritime and Ocean University wharf in Busan, the coastal sea of Pohang, Gyeongcheonho in Mungyeong, and Bangdongho in Daejeon (Jeollabuk-do, 2019). The sites mentioned above need to separately provide facilities required for test preparation, including space for maintenance and repair of test equipment on land including wharf facilities. The need and demand for performance verification in real sea environments is also increasing with the increasing levels of technology and equipment being developed. The Ministry of Maritime Affairs and Fisheries is building a 5 MW

Enhancing Wave Energy Conversion Efficiency through Supervised Regression Machine Learning Models

“…These hurdles encompass issues such as efficiency limitations and the high deployment costs associated with wave energy technologies [7][8][9]. Consequently, the commercial landscape lacks fully realized wave energy structures at present [10,11]. Nevertheless, a multitude of researchers hold the view that ocean wave energy represents an immensely promising sector for the development of sustainable, green energy solutions.…”

Coupled Dynamic Analysis of a Bottom-Fixed Elastic Platform with Wave Energy Converters in Random Waves

“…For accurate analysis, a coupled analysis considering the interaction between the WEC and the structure was performed. As a demonstration site of the proposed Wavestar-system simulation, Buan, one of the nearshore regions of Korea, was selected for the detailed case study [19,20], using various sources of ocean wave data nearby [5,[20][21][22][23][24][25]. The hydraulic PTO system was simplified by linear equivalent damping for the rotational motions of the arms.…”

An Experimental Study on Condition Diagnosis for Thrust Bearings in Oscillating Water Column Type Wave Power Systems

“…Among the wave power system, the oscillating water column (OWC) wave power system, shown in Figure 1 , represent the primary energy conversion system for converting wave energy into the vertical motion of the wave column inside the chamber, the secondary energy conversion system for rotating the turbine using the airflow generated during the vertical motion of the water column and the final energy conversion system for generating the magnetic field using the rotation of the turbine [ 13 ]. This system has a stability advantage over other wave power systems because the mechanical hydraulics and electrical components are not submerged in seawater [ 14 ].…”