压缩二氧化碳储能系统研究进展

Research progress of compressed carbon dioxide energy storage system

压缩二氧化碳储能技术作为一种新型的压缩气体储能技术,具有储能密度大、经济成本低、运行寿命长、负碳排放等多方面优势,适合我国大规模长时储能系统建设和可持续发展的需求,具有非常广阔的发展前景。本文对比分析了压缩二氧化碳储能系统相比于压缩空气储能系统的优势,梳理了压缩二氧化碳储能技术的分类,其中详细介绍了跨临界二氧化碳储能系统、超临界二氧化碳储能系统和液态二氧化碳储能系统的运行原理、系统性能以及适用场景等方面特点,阐述了系统关键运行参数对系统性能的影响规律以及系统[火用]损分布情况,得出系统性能的提升方法,进一步介绍了压缩二氧化碳储能系统的改进系统以及耦合其他外部能源系统的压缩二氧化碳储能系统对系统性能的提升效果,最后分析了压缩二氧化碳储能系统的优势和发展方向。本文旨在总结当前压缩二氧化碳储能技术研究成果,指出现有压缩二氧化碳储能系统的优缺点,为后续学者研究压缩二氧化碳储能系统指引方向,也为压缩二氧化碳储能系统实验及示范的建立提供参考。

Compressed carbon dioxide energy storage(CCES),a new type of compressed gas energy storage technology,has the advantages of high energy storage density,low economic cost,long operation life,negative carbon emissions,etc.It is suitable for large-scale,long-term energy storage systems for construction and sustainable development in China and has a broad development prospect.This paper intuitively shows the advantages of a CCES system compared with a compressed air energy storage system.It introduces the operation principle,system performance,and applicable scenarios of cross-critical,supercritical,and liquid CCES system.Similarly,this paper also expounds on the influence of key operating parameters on the system performance and its improvement method,and further introduces the improved system and improvement effect of CCES coupled to other external energy systems.Finally,the advantages and development direction of the CCES system is analyzed.This paper aims to summarize the current research results of CCES technology,point out its advantages and disadvantages,guide subsequent scholars to study the CCES systems,and provide reference for the experiment and demonstration of CCES systems.