非系泊浮式海上风力发电机与能源船最优发电与运行比较

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Patrick Connolly, C. Crawford
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引用次数: 0

摘要

摘要随着从全球依赖化石燃料过渡的需求增加,生产绿色替代燃料的解决方案是必要的。这些燃料对航运等难以脱碳的行业尤其重要。移动式海上风能系统(MOWES)已被提议作为这样的解决方案之一。这些系统旨在利用遥远的海上风电资源,由于安装和电网连接的限制,该资源丰富但尚未开发。文献中提出了两类MOWES:无人操纵的浮动海上风力涡轮机(UFOWT)和能源船(ES)。这两种系统都是完全由风能驱动的自主发电厂,因此可以用于生产合成绿色燃料,如氢气或氨,或用于其他能源密集型应用,如直接空气碳捕获。这两种技术在形式上不同;UFOWT基于传统的FOWT,但包括螺旋桨代替系泊缆以保持航向,而ES则像帆船一样运行,并通过安装在船体下侧的水轮机发电。尽管这些系统的可行性需要大量的研究和开发,但利用离岸强风的前景以及避免选址监管挑战的潜力是诱人的。本文开发了每个MOWES概念的模型,以在一致的基础上比较它们的发电量。这些技术的性能是在相对风速和角度的稳态运行点进行检查的。优化方案用于确定控制变量的值,该控制变量定义了每组环境条件的操作点。每个模型的结果都与UFOWT和ES的已发表结果一致。模型结果表明,在理想的环境条件下,UFOWT可以产生比ES更多的功率,但对非设计运行条件非常敏感。在高于额定风速的情况下,UFOWT能够产生与传统系泊FOWT一样多的功率,而ES则不能,因为旋转Flettner转子总是需要消耗一些功率。这里开发的模型及其结果可能在未来的工作中都很有用,这些工作侧重于不明飞行物的路由或整体设计移动不明飞行物。尽管已经发现了系统性能的差异,但还需要做更多的工作来辨别哪种是更可行的绿色电燃料(电子燃料)生产商。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of optimal power production and operation of unmoored floating offshore wind turbines and energy ships
Abstract. As the need to transition from global reliance on fossil fuels grows, solutions for producing green alternative fuels are necessary. These fuels will be especially important for hard-to-decarbonize sectors such as shipping. Mobile offshore wind energy systems (MOWESs) have been proposed as one such solution. These systems aim to harness the far-offshore wind resource, which is abundant and yet untapped because of installation and grid-connection limitations. Two classes of MOWES have been proposed in the literature: unmoored floating offshore wind turbines (UFOWTs) and energy ships (ESs). Both systems operate as autonomous power-to-X (PtX) plants, powered entirely by wind energy, and so can be used to produce synthetic green fuels such as hydrogen or ammonia, or for other energy-intensive applications such as direct air carbon capture. The two technologies differ in form; UFOWTs are based on a conventional FOWT but include propellers in place of mooring lines for course keeping, while ESs operate like a sailing ship and generate power via hydro-turbines mounted on the underside of the hull. Though much research and development is necessary for these systems to be feasible, the promise of harnessing strong winds far offshore, as well as the potential to avoid siting regulatory challenges, is enticing. This paper develops models of each MOWES concept to compare their power production on a consistent basis. The performance of the technologies is examined at steady-state operating points across relative wind speeds and angles. An optimization scheme is used to determine the values of the control variables which define the operating point for each set of environmental conditions. Results for each model show good agreement with published results for both UFOWTs and ESs. Model results suggest that UFOWTs can generate more power than ESs under ideal environmental conditions but are very sensitive to off-design operating conditions. In above-rated wind speeds, the UFOWT is able to produce as much power as a conventional, moored FOWT, whereas the ES cannot, since some power is always consumed to spin the Flettner rotors. The models developed here and their results may both be useful in future works that focus on the routing of UFOWTs or holistically designing a mobile UFOWT. Although differences in the performance of the systems have been identified, more work is necessary to discern which is a more viable producer of green electrofuels (e-fuels).
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来源期刊
Wind Energy Science
Wind Energy Science GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY-
CiteScore
6.90
自引率
27.50%
发文量
115
审稿时长
28 weeks
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