مقاله انگلیسی رایگان در مورد بهینه سازی دو مبدل انرژی موج حجمی – الزویر ۲۰۱۹

This paper studies the multidisciplinary nature of two body wave energy converters by a parametric study based on the Taguchi method which helps to understand the effect of different dependent parameters on the wave energy conversion performance. Seven different parameters are analyzed and their effect on the maximum captured power, resonance frequency and bandwidth is studied. An interesting comparison between a cylindrical submerged body and a spherical one was made in terms of the system’s viscous damping and hydrodynamics. The best system parameter combinations based on the maximum output power, best resonant frequency and frequency bandwidth were identified from the outcomes of the Taguchi method and optimized to capture the maximum power to operate in the specific (Australian) sea regions where the waves’ frequencies are relatively low. This paper should provide a guideline for designers to tune their parameters based on the desired performance and sea state.

Introduction

Renewable energy has been established as one of the most prolific development areas in the twenty first century. The difficulties surrounding exploiting renewable energy resources are no longer related to developing novel technologies, but rather related to the transition and implementation of the renewable harvesting systems within the petrol based power grids around the world. Solar energy, hydropower and wind energy are all being harvested by technologies which are witnessing a high rise in usage, and have been well established and optimized within industry manufacturers. Ocean energy conversion technology on the other hand, while it has a potentially higher efficiency and reduced complexity, is struggling to find its place in the renewable energy 36 market. There are three main types of WECs: point absorbers, terminators, and attenuators, and many modes of operation [1]. These devices have undergone much research and development 39 since there were more than 1000 WEC devices in 2009. With such large amount of research and development, one must attribute the difficulties of the wave energy converter development to the multidisciplinary nature of harvesting power from ocean waves. For example, hydropower is highly accounted for fluid and thermo dynamics, this results in a convergence and simplicity of the focus on developing hydropower energy harvesters. On the other hand, as presented in [2], wave energy harvesters are related to many disciplines and factors, as their performance is highly  affected by the PTO (power take-off) system, the hydrodynamic design, and dynamics and control in an attempt to increase the WEC efficiency for different sea states.