基于经济性分析的熔盐储热辅助燃煤机组灵活调峰系统优化

doi:10.19799/j.cnki.2095-4239.2025.0304

储能科学与技术 ›› 2025, Vol. 14 ›› Issue (7): 2729-2737.doi: 10.19799/j.cnki.2095-4239.2025.0304

• 第十三届储能国际峰会暨展览会专辑 • 上一篇下一篇

基于经济性分析的熔盐储热辅助燃煤机组灵活调峰系统优化

王斌¹(), 刘金恺²^,³, 姜晓霞²^,³, 白宁²^,³(), 鹿院卫³^,⁴

^1.国家电投集团黄河上游水电开发有限公司，青海西宁 810008
^2.国家电投集团科学技术研究院有限公司，北京 102209
^3.国家能源用户侧储能创新研发中心，北京 102209
^4.传热与能源利用北京市重点实验室，北京工业大学，北京 100124

收稿日期:2025-03-28 修回日期:2025-04-22 出版日期:2025-07-28 发布日期:2025-07-11
通讯作者: 白宁 E-mail:wangbin03@spic.com.cn;baining@spic.com.cn
作者简介:王斌（1985—），男，硕士，高级工程师，主要从事火电灵活性改造方面的研究，E-mail：wangbin03@spic.com.cn；

Optimization of flexibile peak shaving system of coal-fired unit aided by molten salt heat storage based on economic analysis

Bin WANG¹(), Jinkai LIU²^,³, Xiaoxia JIANG²^,³, Ning BAI²^,³(), Yuanwei LU³^,⁴

^1.Qinghai Huanghe Hydropower Development Co. , Ltd. , Xi'ning 810008, Qinghai, China
^2.State Power Investment Corporation Research Institute, Beijing 102209, China
^3.National User-Side Energy Storage Innovation Research and Development Center, Beijing 102209, China
^4.Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China

Received:2025-03-28 Revised:2025-04-22 Online:2025-07-28 Published:2025-07-11
Contact: Ning BAI E-mail:wangbin03@spic.com.cn;baining@spic.com.cn

摘要/Abstract

摘要：

熔盐储热与燃煤机组耦合可有效调节机组出力，提高机组灵活性。以600 MW燃煤机组为研究对象，构建主蒸汽抽汽储热及加热旁路高加给水、除氧水、低加凝结水释热的3种熔盐储热辅助调峰运行方案，通过研究主蒸汽抽汽储热回水参数、储/释热功率和储/释热时长等因素对投资回收期和平准化度电成本等经济性指标的影响，对比分析3种方案的经济性能。结果表明：随着回水温度的升高，3种方案投资回收期逐渐缩短，而平准化度电成本略有升高；旁路高加给水方案经济性最好，当回水温度为309.4 ℃、储/释热功率为25 MW、储/释热时长为1 h时，投资回收期为5.521年、平准化度电成本为0.4485元/kWh；随着储/释热功率和时长的增加，该方案投资回收期和平准化度电成本均有所升高。

关键词: 燃煤机组, 熔盐储热, 调峰, 灵活性, 经济性分析

Abstract:

The coupling of molten salt heat storage and coal-fired power unit can effectively regulate unit output and improve unit flexibility. In this article, based on a 600 MW coal-fired unit as the research object, 3 operation schemes for peak shaving aided by molten salt heat storage are constructed, including heat storage from extracted main steam and heat release to bypass feedwater, deaerated water and condensate water. The economic performance of 3 schemes is compared and analyzed by studying the effects of factors such as return water parameters of extracted main steam, heat storage/release power, and heat storage/release duration on economic indicators such as payback period and levelized cost of energy (LCOE). The results indicate that as the return water temperature increases, the payback period of the 3 schemes gradually shortens, while the LCOE slightly rises. The scheme of bypass feedwater has the best economic performance. When the return water temperature is 309.4 ℃, the heat storage/release power is 25 MW, and the heat storage/release duration is 1 hour, the payback period is 5.521 years, and the LCOE is 0.4485 yuan/kWh. With the increase of storage/release power and duration, the payback period and LCOE of this scheme have both increased.

Key words: coal-fired power unit, molten salt heat storage, peak shaving, flexibility, economy analysis

中图分类号:

TK 284.1

王斌, 刘金恺, 姜晓霞, 白宁, 鹿院卫. 基于经济性分析的熔盐储热辅助燃煤机组灵活调峰系统优化[J]. 储能科学与技术, 2025, 14(7): 2729-2737.

Bin WANG, Jinkai LIU, Xiaoxia JIANG, Ning BAI, Yuanwei LU. Optimization of flexibile peak shaving system of coal-fired unit aided by molten salt heat storage based on economic analysis[J]. Energy Storage Science and Technology, 2025, 14(7): 2729-2737.

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热力指标	数值
热力指标	100%额定负荷	50%额定负荷
主蒸汽流量/(t/h)	1848.79	900.11
主蒸汽压力/MPa	16.67	9.77
主蒸汽温度/℃	538.00	538.00
再热蒸汽流量/(t/h)	1576.13	798.27
再热蒸汽压力/MPa	3.41	1.75
再热蒸汽温度/℃	538.00	538.00
1号抽汽压力/MPa	6.08	3.09
2号抽汽压力/MPa	3.79	1.94
3号抽汽压力/MPa	2.05	1.06
4号抽汽压力/MPa	1.02	0.53
5号抽汽压力/MPa	0.62	0.32
6号抽汽压力/MPa	0.24	0.128
7号抽汽压力/MPa	0.08	0.04
发电功率/MW	600.18	300.11
热耗率/(kJ/kWh)	8064.00	8653.00

参数	设定值
高温熔盐温度/℃	365.9
低温熔盐温度/℃	160.0
抽汽回水温度/℃	309.4
储热功率/MW	25
释热功率/MW	25
日储热时长/h	1
日释热时长/h	1
储热基准工况	50%额定负荷
释热基准工况	50%额定负荷
机组日发电小时数/h	24
机组年发电天数/d	300

基于经济性分析的熔盐储热辅助燃煤机组灵活调峰系统优化

Optimization of flexibile peak shaving system of coal-fired unit aided by molten salt heat storage based on economic analysis

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