STUDY ON MULTI-USE OF AN INTEGRATED OFFSHORE WIND TURBINE FOUNDATION AND COASTAL CAGE NET

Hsin Hung Chen ,Ta Hui Lin ,Hwung Hweng Hwung ,Jian Wei Li ,Ray Yeng Yang ,Meng Lin

doi:10.9753/icce.v34.structures.26

Abstract

The objective of this study is to investigate the suitable method for the integration of coastal cage net and the offshore wind farm as scour protection. Physical model tests with the scale of 1:36 are carried out in the Near-shore Wave Basin (NSWB) at Tainan Hydraulics Laboratory (THL) with the jacket type foundation and the combination of coastal cage net in the test area. The location in water depth 16m of the foundation is simulated in this study. From the fixed-bed experimental results, it shows that the up-current optimum location of coastal cage net in front of jacket type foundation can have a good effect to reduce current speed under the condition of distance between cage net and foundation being 2 times foundation width (W). However, the up-wave location of coastal cage net in front of jacket foundation, the wave attenuation effect near wind turbine foundation is not so obvious. From the fixed-bed experimental results, the optimum cage net depth is up to 0.75 water depth (3/4h, 12m cage net depth in-situ) for reducing current speed. After the fixed-bed experimental tests, the mobile experimental study on soft scour protection for the jacket type foundation of offshore wind turbine is further conducted.

Highlights

The growing concern in the 1990s over CO2-forced global warming has given new life to the prospects for greater use of wind turbines because of their credentials as non-polluting generators powered by winds created by solar energy, a renewable resource
Public acceptance of offshore wind farms is very important for the success of the offshore wind energy development in the western Taiwan coastal water area, and it is necessary for the area to explore the concerns of these different users
This study evaluates the feasibility of an integrated offshore wind turbine foundation with cage net aquaculture facility in the effect as a soft scour protection

Summary

Introduction

The growing concern in the 1990s over CO2-forced global warming has given new life to the prospects for greater use of wind turbines because of their credentials as non-polluting generators powered by winds created by solar energy, a renewable resource. The government arranged the renewable energy proportion to reach the goal than expectation, 15.1% in 2025, including 5.3% of offshore wind power. It reveals the offshore wind power is the most important and urgent of all renewable energy, it increases the most and largest than expectation. This amount of electricity from offshore wind energy requires a sizable coastal water area, which is currently shared by various users, including fishermen, shipping lines, recreation and tourism, among others. Public acceptance of offshore wind farms is very important for the success of the offshore wind energy development in the western Taiwan coastal water area, and it is necessary for the area to explore the concerns of these different users

Objectives

Findings

Conclusion