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压缩二氧化碳储能系统储释能性能影响机制实验研究

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压缩二氧化碳储能系统储释能性能影响机制实验研究

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Experimental investigation on influence mechanism of energy storage and release performance of compressed CO₂ energy storage system

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doi: 10.19666/j.rlfd.202604095

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压缩二氧化碳储能（CCES）是促进新能源消纳、保障电力系统安全稳定运行的重要技术，具备良好的工程应用前景。

【目的】本文探究低压释能阶段关键运行参数对系统性能的影响规律，为低压CCES系统的工程应用与运行优化提供实验依据。

【方法】针对0~1 MPa压缩二氧化碳储能系统的释能过程，研究了阀门开度与加热温度对系统释能性能的影响规律。

【结果】结果表明，在本文实验工况范围内，阀门开度对低压CCES系统的释能性能具有显著影响，其中40%开度工况的释能时长较100%全开工况延长28%，可在一定程度上提升系统的持续释能能力。加热温度能够提高膨胀机输出功率，温度70 ℃加热工况的提升效果优于60 ℃工况，且该效应在小于50%开度工况下更为突出。

【结论】阀门开度与加热温度是调控低压CCES系统释能特性的关键参数。综合运行稳定性、发电功率与释能时长指标对比，本文实验范围内阀门50%开度、加热温度70 ℃加热工况在兼顾释能持续性和运行稳定性的长时释能需求下表现较优，其功率波动幅度比100%全开工况小。相关结果可为低压CCES系统运行调控提供实验参考。

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Compressed Carbon Dioxide Energy Storage (CCES) is a new type of energy storage technology that adapts to large-scale integration of new energy, ensuring the safe and stable operation of new power systems. With advantages such as being environmentally friendly, highly efficient, strong adaptability to operating conditions, and good energy storage stability, it has broad engineering application prospects in power peak regulation, frequency regulation, and long-duration energy storage, and is a current hotspot in energy storage technology research.

[Objective] To further optimize the actual operating performance of low-pressure compressed carbon dioxide energy storage systems and improve the system operation and control framework, this paper conducts a dedicated study on the operating characteristics of the low-pressure energy release phase in low-pressure CCES systems, investigating the influence of key operating parameters on the overall energy release performance of the system, providing reliable experimental support and theoretical basis for the engineering implementation, parameter optimization, and stable operation of low-pressure CCES systems.

[Methods] This study focuses on a 0-1 MPa low-pressure compressed carbon dioxide energy storage system, concentrating on the core control elements during the energy release process. Through controlled variable experiments, the influence of two major parameters—valve opening and heating temperature—on key performance indicators, such as energy release duration, output power, and operational stability, is systematically investigated.

[Results] The results indicate that within the experimental conditions of this study, valve opening is the core parameter affecting the energy release performance of low-pressure CCES systems, significantly regulating the continuity of energy release. Compared with the fully open (100%) condition, a 40% valve opening condition effectively extends the energy release duration by 28%, greatly enhancing the system's long-term continuous energy release capability. Meanwhile, heating temperature can effectively increase the power output of the expander, with the 70°C heating condition showing a more pronounced power improvement than the 60°C condition, particularly under valve openings less than 50%.

[Conclusion] Valve opening and heating temperature are key parameters for regulating the energy release characteristics of low-pressure CCES systems. Considering the comparison of operational stability, power generation, and energy release duration, within the experimental range of this study, the 50% valve opening combined with 70°C heating condition performs better in meeting long-duration energy release demands while balancing energy release continuity and operational stability. Under this condition, the power fluctuation amplitude is only one-third of that under the fully open condition, making it suitable for long-term stable energy release in power systems and providing an important reference for the practical operation and control of low-pressure CCES systems.

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. 压缩二氧化碳储能系统储释能性能影响机制实验研究. 热力发电, : - . DOI: 10.19666/j.rlfd.202604095

. Experimental investigation on influence mechanism of energy storage and release performance of compressed CO₂ energy storage system[J]. Thermal Power Generation, : - . DOI: 10.19666/j.rlfd.202604095

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doi: 10.19666/j.rlfd.202604095

首发时间：2026-10-29

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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