Print Email Facebook Twitter Wave power extraction from multiple oscillating water columns along a straight coast Title Wave power extraction from multiple oscillating water columns along a straight coast Author Zheng, Siming (Plymouth University) Antonini, A. (TU Delft Coastal Engineering) Zhang, Yongliang (Tsinghua University) Greaves, Deborah (Plymouth University) Miles, Jon (Plymouth University) Iglesias, Gregorio (Plymouth University; University College Cork) Date 2019 Abstract The integration of oscillating water column (OWC) wave energy converters into a coastal structure (breakwater, jetty, pier, etc.) or, more generally, their installation along the coast is an effective way to increase the accessibility of wave power exploitation. In this paper, a theoretical model is developed based on the linear potential flow theory and eigenfunction matching method to evaluate the hydrodynamic performance of an array of OWCs installed along a vertical straight coast. The chamber of each OWC consists of a hollow vertical circular cylinder, which is half embedded in the wall. The OWC chambers in the theoretical model may have different sizes, i.e. different values of the radius, wall thickness and submergence. At the top of each chamber, a Wells turbine is installed to extract power. The effects of the Wells turbine together with the air compressibility are taken into account as a linear power take-off system. The hydrodynamic and wave power extraction performance of the multiple coast-integrated OWCs is compared with that of a single offshore/coast-integrated OWC and of multiple offshore OWCs. More specifically, we analyse the role of the incident wave direction, chamber size (i.e. radius, wall thickness and submergence), spacing between OWCs and number of OWCs by means of the present theoretical model. It is shown that wave power extraction from the coast-integrated OWCs for a certain range of wave conditions can be significantly enhanced due to both the constructive array effect and the constructive coast effect. Subject surface gravity waveswave scatteringwave-structure interactions To reference this document use: http://resolver.tudelft.nl/uuid:33ced909-a5e4-45cc-be1d-c6ac09f0cc04 DOI https://doi.org/10.1017/jfm.2019.656 Embargo date 2020-03-13 ISSN 0022-1120 Source Journal of Fluid Mechanics, 878, 445-480 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 Siming Zheng, A. Antonini, Yongliang Zhang, Deborah Greaves, Jon Miles, Gregorio Iglesias Files PDF Wave_power_extraction_fro ... _final.pdf 11.97 MB Close viewer /islandora/object/uuid:33ced909-a5e4-45cc-be1d-c6ac09f0cc04/datastream/OBJ/view