Abstract
This study is focused on the wave energy converter of an oscillating water column (OWC) system that is integrated with a jacket type infrastructure applied for an offshore wind turbine system. In this way, electricity generation by both wind power and wave power can be conducted simultaneously to maximize the utilization of sustainable energy. A numerical analysis was performed in this research to model and simulate the airflow response and evaluate the converting efficiency of wave energy from an OWC system integrated with an offshore template structural system. The performance of the system including the generating airflow velocity, air-pressure in the chamber, generating power and then the converting efficiency of power from waves are all analyzed and discussed in terms of the variations of the OWC system’s geometrical parameters. The parameters under consideration include the exhale orifice-area of airflow, gate-openings of inflow water and the submerged chamber depth. It is found that from the analytical results the performance of the OWC wave energy converter is influenced by the dimensional parameters along with the design conditions of the local environment. After a careful design based on the in-situ conditions including water depth and wave parameters, an open OWC system can be successfully applied to the template structure of offshore wind power infrastructure as a secondary generating system for the multi-purpose utilization of the structure.
Highlights
The intensive development in the high technology industry and the over- consumption of products such as clothes, shoes and electronic devices demands more power supply for industries than ever
Most electricity power is generated from combustion power plants and the large amounts of carbon dioxide discharged into the air inevitably cause many environmental problems
Among all kinds of ocean energy, wave energy is the one being studied most thoroughly because it is well distributed in the oceans around the world and the energy is abundant
Summary
The intensive development in the high technology industry and the over- consumption of products such as clothes, shoes and electronic devices demands more power supply for industries than ever. Besides the requirements from the industries, the supply of power required for a more comfortable civil life has increased massively, mainly in newly developed countries. Most electricity power is generated from combustion power plants and the large amounts of carbon dioxide discharged into the air inevitably cause many environmental problems. Those environmental problems pollute people’s normal life and affect their health but eventually lead to dramatic climate change, which has been evidenced and discussed by many studies [1,2]. Devices for the exploitation of wave energy have been extensively studied, among which oscillating water column (OWC) wave energy converting systems are ones with relatively higher efficiency
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