Techno-economic analysis of recuperated Joule-Brayton pumped thermal energy storage
Techno-economic analysis of recuperated Joule-Brayton pumped thermal energy storage
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DOI：
10.1016/j.enconman.2021.115016
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发表时间：
2021-12
影响因子：
10.4
通讯作者：
J. McTigue;Pau Farres-Antunez;Kavin Sundarnath J;C. Markides;Alexander J. White
中科院分区：
文献类型：
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作者：
J. McTigue;Pau Farres-Antunez;Kavin Sundarnath J;C. Markides;Alexander J. White
本文描述了基于焦耳-布雷顿循环和两罐液体存储的泵热能存储系统的技术经济模型。已为每个组件开发了模型，特别强调热交换器。通过从文献中收集大量成本相关性来评估电力和能源资本成本（即每千瓦和每千瓦时容量）以及平准化存储成本等经济指标，从而能够估计不确定性。研究发现，使用效率高达 0.95 的热交换器在经济上是值得的，但较高的值会导致组件尺寸和系统成本迅速增加。考虑了几种热存储流体；那些在最高温度下运行的盐（氯化物盐）可提高往返效率，但其收益微乎其微，并且与低温硝酸盐相比，可能无法承担额外的材料成本和风险。使用多目标优化算法探索成本效率权衡，产生往返效率在 59-72% 范围内的最佳设计，相应的平准存储成本为 0.12±0.03 和 0.38±0.10$/kWh e。在当前情况下，放电持续时间超过 6 小时，使用寿命成本与锂离子电池相比具有竞争力。
This article describes a techno-economic model for pumped thermal energy storage systems based on recuperated Joule-Brayton cycles and two-tank liquid storage. Models have been developed for each component, with particular emphasis on the heat exchangers. Economic metrics such as the power and energy capital costs (ie, per-kW and per-kWh capacity) and levelized cost of storage are evaluated by gathering numerous cost correlations from the literature, thereby enabling estimates of uncertainty. It is found that the use of heat exchangers with effectivenesses up to 0.95 is economically worthwhile, but higher values lead to rapidly escalating component size and system cost. Several hot storage fluids are considered; those operating at the highest temperatures (chloride salts) improve the round-trip efficiency but the benefit is marginal and may not warrant the additional material costs and risk when compared to lower-temperature nitrate salts. Cost-efficiency trade-offs are explored using a multi-objective optimization algorithm, yielding optimal designs with round-trip efficiencies in the range 59–72% and corresponding levelized storage costs of 0.12±0.03 and 0.38±0.10$/kWh e. Lifetime costs are competitive with lithium-ion batteries for discharging durations greater than 6 h under current scenarios.