Theoretical analysis of cavern-related exergy losses for compressed air energy storage systems
Theoretical analysis of cavern-related exergy losses for compressed air energy storage systems
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DOI：
10.1016/j.est.2024.110419
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发表时间：
2024-03
影响因子：
9.4
通讯作者：
Alexander J. White
中科院分区：
文献类型：
--
作者：
Alexander J. White
本文对恒容压缩空气洞内压力和温度变化引起的火能损失进行了热力学分析。直接的洞穴损失是由于混合和不可逆的热传递造成的，并且还可能包括由于排出空气中无法使用的热火用而导致的出口损失。额外的与洞穴相关的损失可能发生在其他系统组件中，包括压缩机（由于非设计操作）、节流阀和热库。还针对简化但具有代表性的绝热压缩空气储能系统讨论和分析了这些间接损失。总体目标是确定各种损耗分量与操作参数（主要是最小和最大洞穴压力）和其他热参数的趋势。还对等压存储和等容存储进行了比较，揭示了这两种存储模式的效率与存储密度的趋势。
The paper presents a thermodynamic analysis of the exergetic losses occurring due to pressure and temperature variations within constant-volume compressed air caverns. Direct cavern losses are due to mixing and irreversible heat transfer, and may also include an exit loss as a result of unusable thermal exergy in the discharge air. Additional cavern-related losses may occur in other system components, including compressors (due to off-design operation), throttles and thermal stores. These indirect losses are also discussed and analysed for a simplified but representative adiabatic compressed air energy storage system. The overall aim is to determine trends in the various loss components with operating parameters (chiefly the minimum and maximum cavern pressures) and other thermal parameters. A comparison between isobaric and isochoric storage is also made and reveals the trends of efficiency vs. storage density for these two modes of storage.