Optimized Floating Offshore Wind Turbine Substructure Design Trends for 10–30 MW Turbines in Low-, Medium-, and High-Severity Wave Environments

Designs Pub Date : 2024-07-18 DOI:10.3390/designs8040072
Joseph Habib Dagher, A. Goupee, A. Viselli
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Abstract

Floating offshore wind is a promising renewable energy source, as 60% of the wind resources globally are found at depths requiring floating technologies, it minimizes construction at sea, and provides opportunities for industrialization given a lower site dependency. While floating offshore wind has numerous advantages, a current obstacle is its cost in comparison to more established energy sources. One cost-reduction approach for floating wind is increasing turbine capacities, which minimizes the amount of foundations, moorings, cables, and O&M equipment. This work presents trends in mass-optimized VolturnUS hull designs as turbine capacity increases for various wave environments. To do this, a novel rapid hull optimization framework is presented that employs frequency domain modeling, estimations of statistical extreme responses, industry constructability requirements, and genetic algorithm optimization to generate preliminary mass-optimal VolturnUS hull designs for a given turbine design and set of site conditions. Using this framework, mass-optimized VolturnUS hull designs were generated for 10–30 MW turbines for wave environments of varying severities. These design studies show that scaling up turbine capacities increases the mass efficiency of substructure designs, with decreasing returns, throughout the examined turbine capacity range. Additionally, increased wave environment severity is shown to increase the required mass of a given substructure design.
低、中、高剧烈波浪环境下 10-30 兆瓦浮式近海风力涡轮机下部结构的优化设计趋势
漂浮式海上风能是一种前景广阔的可再生能源,因为全球 60% 的风力资源都在需要漂浮技术的深度,它最大限度地减少了海上施工,并且由于对场地的依赖性较低,为工业化提供了机会。虽然漂浮式海上风能具有众多优势,但与更成熟的能源相比,目前的障碍在于其成本。降低浮动风能成本的方法之一是提高涡轮机容量,从而最大限度地减少地基、系泊设备、电缆和运行维护设备的数量。这项工作介绍了随着涡轮机容量的增加,在各种波浪环境下大规模优化伏特加船体设计的趋势。为此,介绍了一个新颖的快速船体优化框架,该框架采用频域建模、统计极端响应估算、工业可施工性要求和遗传算法优化,针对给定的涡轮机设计和现场条件生成初步的质量优化伏特努斯船体设计。利用这一框架,针对不同严重程度的波浪环境,为 10-30 兆瓦的涡轮机生成了质量优化的伏特努斯船体设计。这些设计研究表明,在所考察的涡轮机容量范围内,涡轮机容量的增加会提高下部结构设计的质量效率,但回报率会逐渐降低。此外,波浪环境严重程度的增加也会增加特定下部结构设计所需的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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