超临界二氧化碳发电储能系统构型优化及性能分析

doi:10.3969/j.issn.1008-0198.2024.04.001

湖南电力 ›› 2024, Vol. 44 ›› Issue (4): 1-10.doi: 10.3969/j.issn.1008-0198.2024.04.001

• 特约专栏：新能源发电与储能技术 • 下一篇

超临界二氧化碳发电储能系统构型优化及性能分析

朱光明^1,2, 陈珣^1,2, 何洪浩^1,2, 孙瑞强³, 谢国鸿^1,2, 杨奕^1,2, 王阳光⁴

1.国网湖南省电力有限公司电力科学研究院,湖南长沙 410208;
2.高效清洁发电技术湖南省重点实验室,湖南长沙 410208;
3.西安交通大学,陕西西安 710061;
4.国网湖南省电力有限公司,湖南长沙 410004

收稿日期:2024-06-25 出版日期:2024-08-25 发布日期:2024-09-09
通信作者: 朱光明(1975),男,河南方城人,博士,正高级工程师,主要从事煤掺烧和火电厂节能技术等方面的研究工作。
基金资助:
国网湖南省电力有限公司科技项目(5216A5220012)

Configuration Optimization and Performance Analysis of Supercritical Carbon Dioxide Power Generation and Energy Storage Integrated System

ZHU Guangming^1,2, CHEN Xun^1,2, HE Honghao^1,2, SUN Ruiqiang³, XIE Guohong^1,2, YANG Yi^1,2, WANG Yangguang⁴

1. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410208, China;
2. Hunan Province Key Laboratory of Efficient and Clean Power Generation Technologies, Changsha 410208, China;
3. Xi'an Jiaotong University, Xi'an 710061, China;
4. State Grid Hunan Electric Power Company Limited, Changsha 410004, China

Received:2024-06-25 Online:2024-08-25 Published:2024-09-09

摘要/Abstract

摘要： 为实现燃煤发电系统效率和灵活性协同提升,促进火电机组转型,提出采用超临界二氧化碳(S-CO₂)工质、构建燃煤发电与热泵储电耦合的系统(“源储一体”系统)方案。基于热力学第一、二定律,建立集成系统的设计及变工况计算模型,进而对系统灵活性提升潜力和储—放热过程的能效进行分析。结果表明:在S-CO₂燃煤发电系统的基础上集成热泵储电技术,可将机组最小输出功率由30%额定负荷降低至0,极大提升了调峰深度和运行灵活性;当选择75%额定负荷为放热工况时,输出功率可增加额定负荷的23.59%,则集成系统的储—释热等效往返效率为78.64%。对储热参数进行敏感性分析,得到熔盐冷罐温度的最佳取值范围为405~420 ℃,常压水热罐温度的取值范围为70~75 ℃。

关键词: 超临界二氧化碳, 燃煤发电, 热泵储电, 灵活性

Abstract: To synergistically enhance the efficiency and flexibility of coal-fired power system, and promote the transformation of thermal power units, a scheme of using supercritical carbon dioxide (S-CO₂) working fluid to construct a coupling system of coal-fired power generation and pumped thermal electricity storage (“source-storage-integrated” system) is proposed. Based on the first and second laws of thermodynamics, the design and off-design calculation models of the integrated system are developed, and the potential of the flexibility improvement and the energy efficiency of the heat storage-release process are analyzed. The results show that by integrating pumped thermal electricity storage technology on the basis of S-CO₂ coal-fired power system, the minimum output power of the unit can be reduced from the original 30% rated load to zero, which greatly improves the peak regulation depth and operation flexibility. When 75% rated load is selected as the heat release condition, the output power can be increased by 23.59% of the rated load. In addition, the equivalent round-trip efficiency of the heat storage-release process of the integrated system is 78.64%. The sensitivity analysis of heat storage parameters shows that the optimal value range for the molten salt cold tank temperature is 405~420 ℃, and the value range for the atmospheric pressure water hot tank temperature is 70~75 ℃.

Key words: supercritial carbon dioxide, coal-fired power generation, pumped thermal electricity storage, flexibility

中图分类号:

TK116

朱光明, 陈珣, 何洪浩, 孙瑞强, 谢国鸿, 杨奕, 王阳光. 超临界二氧化碳发电储能系统构型优化及性能分析[J]. 湖南电力, 2024, 44(4): 1-10.

ZHU Guangming, CHEN Xun, HE Honghao, SUN Ruiqiang, XIE Guohong, YANG Yi, WANG Yangguang. Configuration Optimization and Performance Analysis of Supercritical Carbon Dioxide Power Generation and Energy Storage Integrated System[J]. Hunan Electric Power, 2024, 44(4): 1-10.

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超临界二氧化碳发电储能系统构型优化及性能分析

Configuration Optimization and Performance Analysis of Supercritical Carbon Dioxide Power Generation and Energy Storage Integrated System

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