Review of enhancement for ocean thermal energy conversion system

IF 13 1区 工程技术 Q1 ENGINEERING, MARINE
Safaa Malik Abbas, Hend Dakhel Skhaal Alhassany, David Vera, Francisco Jurado
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引用次数: 11

Abstract

Ocean thermal energy conversion (OTEC) is a renewable energy source that uses differences in ocean water temperature between warm surface and cold depth to generate electricity. It is an essential link in the carbon neutrality chain and one of the rising sectors of the ocean energy. This paper provides an overview of studies on closed thermodynamic cycles and the numerous difficulties that OTEC technology faces. A description of the thermodynamic cycles incorporating mixed or pure working fluids, as well as the implications of different working fluids on cycle efficiency were also studied. Changes in condensing and evaporating temperatures induced by variations in heat resources affect the efficiency of cycles with pure working fluids. Several strategies, such as intermediate extraction regeneration and heat recovery of ammonia-depleted solution can increase the thermal efficiency with mixed working fluids. In addition, the impact of the ejector on the cycle's performance is examined. Finally, the efficiency-improving strategies are described and summarized. Thermodynamic efficiency can increase using suitable working fluids and taking steps to maximize the rate of ocean thermal energy. To establish which approach is the most effective, different methods have been evaluated and compared under identical operating conditions.

海洋热能转换系统改进研究进展
海洋热能转换(OTEC)是一种可再生能源,利用温暖表面和寒冷深度之间的海水温度差异来发电。它是碳中和链中的一个重要环节,也是海洋能源的新兴部门之一。本文概述了封闭热力学循环的研究以及OTEC技术面临的诸多困难。还研究了包含混合或纯工作流体的热力学循环的描述,以及不同工作流体对循环效率的影响。由热资源的变化引起的冷凝和蒸发温度的变化会影响纯工作流体的循环效率。几种策略,如中间萃取再生和贫氨溶液的热回收,可以提高混合工质的热效率。此外,还考察了喷射器对循环性能的影响。最后,对提高效率的策略进行了描述和总结。使用合适的工作流体并采取措施使海洋热能的速率最大化,可以提高热力学效率。为了确定哪种方法最有效,在相同的操作条件下对不同的方法进行了评估和比较。
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来源期刊
CiteScore
11.50
自引率
19.70%
发文量
224
审稿时长
29 days
期刊介绍: The Journal of Ocean Engineering and Science (JOES) serves as a platform for disseminating original research and advancements in the realm of ocean engineering and science. JOES encourages the submission of papers covering various aspects of ocean engineering and science.
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