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首页> 外文期刊>Proceedings of the Institution of Civil Engineers >An analysis of a large-scale liquid air energy storage system
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An analysis of a large-scale liquid air energy storage system

机译：大型液态空气储能系统分析

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Liquid air energy storage (LAES) is a class of thermo-electric energy storage that utilises cryogenic or liquid air as the storage medium. The system is charged using an air liquefier and energy is recovered through a Rankine cycle using the stored liquid air as the working fluid. The recovery, storage and recycling of cold thermal energy released during discharge more than double the overall energy efficiency of the cycle. The demand on a storage plant in a grid support application is expected to be irregular and intermittent in response to fluctuating supply from intermittent renewable generators. This will complicate the storage of thermal energy and will mean the energy flow rates in the thermal store will vary from cycle to cycle and the state of charge of the store will also vary. This paper presents an analysis of the LAES cycle. The material and configuration of the cold thermal store is discussed in particular with reference to scale and measures to mitigate losses due to the irregular and intermittent duty cycle. The paper concludes with capital and levelised cost analysis of a reference 20 MW/80 MWh LAES plant and a comparison of the levelised cost with other storage technologies.
机译：液态空气能量存储（LAES）是一类利用低温或液态空气作为存储介质的热电能量存储。使用空气液化器给系统充电，并使用储存的液态空气作为工作流体通过兰金循环回收能量。放电过程中释放的冷热能的回收，存储和再循环是整个循环能源效率的两倍以上。响应间歇性可再生发电机的供应波动，预计电网支持应用程序中对存储工厂的需求是不规则的和间歇性的。这将使热能的存储复杂化，并且将意味着热能库中的能量流率将随周期而变化，并且储能器的充电状态也将变化。本文介绍了LAES周期的分析。尤其参考规模和减轻不规则和间歇性占空比造成的损失的措施来讨论冷蓄热器的材料和配置。本文以参考20兆瓦/ 80兆瓦时LAES电厂的资本成本和均摊成本分析作为结束，并对均摊成本与其他存储技术的比较进行了总结。

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