Adiabatic Compressed Air Energy Storage system performance with application-oriented designed axial-flow compressor
Adiabatic Compressed Air Energy Storage system performance with application-oriented designed axial-flow compressor
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DOI：
10.1016/j.enconman.2024.118233
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发表时间：
2024-03
影响因子：
10.4
通讯作者：
D. Pottie;Maury M. Oliveira;Bruno Cardenas;Zahra Baniamerian;Seamus Garvey;James Rouse;Edward Hough;Audrius Bagdanavicius;Abdullah M. Ali;P. Eames;E. Barbour
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文献类型：
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作者：
D. Pottie;Maury M. Oliveira;Bruno Cardenas;Zahra Baniamerian;Seamus Garvey;James Rouse;Edward Hough;Audrius Bagdanavicius;Abdullah M. Ali;P. Eames;E. Barbour
预计中长期储能系统将在向以可再生能源为动力的电网过渡过程中发挥关键作用。ACAES是一个很有前途的解决方案，能够分别处理超过数百兆瓦和兆瓦时的功率和能源额定值。ACAES的一个挑战是，随着空气储存压力的变化，在系统中遇到的各种条件下，在压缩机中实现所需的高效运行。本文设计了一种面向应用的轴流压气机，其目标是在整个工作范围内高效运行，同时将性能预测与实际的压气机几何形状相关联。基于无粘轴对称流动条件的两步设计方法已经被实施，从而得到了流动轨迹、叶片排几何和压气机性能图。压缩机模型被集成到ACAES模型中，包括两个压缩卷轴、两个带预热的膨胀级、一个在5.5-7.7兆帕之间工作的定容高压储能器和两个独立的热能储能器。虽然现有的ACAES文献要么忽略了变工况操作，要么使用通用的数值关联式(与特定的几何形状无关)，本文的主要创新之处在于将透平机械的详细设计方法应用到ACAES中。结果表明，所设计的压气机在两个转轴上需要33级，并且能够在储存压力范围内高效运行，这表明，如果将面向应用的设计方法应用于压缩机，它不会阻止ACAES达到70%的往返效率，输出35 MW的功率约为15h，更重要的是，通过减少中间冷却器的数量，满足了ACAES在更高温度下保温的具体要求。最后，建议对其他部件(即膨胀器、热交换器和TES装置)进行类似程度的审查，同时铭记ACAES的一套独特的操作要求。这项工作是朝着消除常见的误解迈出的重要一步，这种误解认为现成的组件可以很容易地用于典型的ACAES设计。
Medium and long-duration energy storage systems are expected to play a critical role in the transition towards electrical grids powered by renewable energy sources. ACAES is a promising solution, capable of handling power and energy ratings over hundreds of MW and MWh, respectively. One challenge with ACAES is achieving the required highly efficient operation in the compressor over the range of conditions encountered in the system as the pressure in the air store changes. In this paper, an application-oriented axial-flow compressor is designed, aiming towards efficient operation throughout the operation range, whilst also associating the performance prediction to a practical compressor geometry. A two-step design methodology based on inviscid, axisymmetric flow conditions has been implemented, leading to the flowtrack, blade-row geometries and the compressor performance map. The compressor model is integrated into an ACAES model, including two compression spools, two expansion stages with preheat, a constant volume high pressure storage operating between 5.5 and 7.7 MPa and two separate Thermal Energy Storage units. While the existing ACAES literature either ignores the transient off-design operation or uses generic numerical correlations (which are not associated to a particular geometry), the key novelty of this paper is the application of a detailed design method for turbomachinery to ACAES. The results indicate that the designed compressor requires 33 stages over the two spools, and is able to operate efficiently over the storage pressure range, showing that if the application-oriented design procedure is applied to the compressor, it does not stop ACAES reaching 70% round-trip efficiency, outputting 35MW for approximately 15 h. Importantly, the specific ACAES requirement of conserving heat at higher temperatures has been fulfilled by decreasing the number of intercoolers. Finally, it is recommended that a similar level of scrutiny is applied to the other components (i.e.expanders, heat exchangers and TES units), keeping in mind the unique set of operational requirements of ACAES. This work is an important step towards removing the common misconception that off-the-shelf components can be easily be used in typical ACAES designs.