The investigation of a segment multi-chamber oscillating water column in physical scale model

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Conference Proceeding
Proceedings of the 2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA), 2016, pp. 183 - 188
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Renewable energy has gained much attention and there is a substantial body of both theoretical and experimental research [1]. A wide variety of technologies have been proposed, studied and a few tested in real condition at full size [2]. Of the new technologies, wind and wave have reached a degree of mature technology. Ocean wave energy is regarded as one of the major renewable energy resources with great potential for development over the course of the next few years but it is still virtually untapped. It has the advantages of a high energy density and continual availability [2] [3]. The oscillating water column (OWC) is one type of wave energy converter (WEC). It is designed to extract energy from ocean waves by using water to move trapped air and thus drive an air turbine. The OWC device is considered as the oldest and the most widely researched type of the wave energy device. It has been successfully constructed and tested at several sites. There are several reasons for using this device; the low operational cost, and the only moving part of the energy conversion mechanism are the rotors of a turbine. Hence it has less negative environmental impact [4]. Many devices operate in real ocean waves [5]; the most powerful wave energy devices constructed were the Osprey in the UK in 1995, and the the greenWave device in Australia in 2014. Both were rated 1 MW and near-shore plants. Both were severely storm damaged. Recently the successful deployment of a OWC at Jeju Island, South Korea, worked at rated power of 500 kW. These successful devices show that the obstacles can be overcome with further research [6]. Table 1 summarizes most of the OWC devices that have been installed in various countries with the real or expected capacity and the turbine type that was used to extract the power.
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