热力发电2024，Vol.53Issue(3)：89-98,10.DOI:10.19666/j.rlfd.202307141
670MW燃煤机组耦合熔盐储能系统方案设计及性能分析
Scheme design and performance analysis for a 670 MW coal-fired unit coupled with molten salt energy storage system
摘要
Abstract
To address the challenges posed by the reverse peak shaving characteristics of new energy generation units to the smooth operation of the power grid,coal-fired units urgently need to improve their flexible operation and deep peak shaving capabilities.This article proposes three schemes of molten salt heat storage and heat release for a 670 MW reheating unit,including using a steam ejector to allocate the steam inlet flow rate of the reheater.By using Ebsilon to establish the thermal model,this article analyzes the performance of the coupled system.The results show that all schemes can effectively expand the peak shaving range of the unit.Under energy-storage conditions,the thermal economy of steam-extraction is better than using electrical heating at the same peak shaving depth.The heat-storage scheme of integrating steam ejector to allocate extraction steam to compensate for reheat inlet flow can effectively solve the problem of reheater over temperature caused by a large amount of extracted main steam.Under heat-release conditions,using molten salt to heat high pressure feed water can acquire better thermal and economic benefits.In the combination scheme of heat storage and release,C1-S2 exhibits the best economic performance,with an upward peak shaving depth of 76.89 MW,and a cyclic thermal efficiency and thermal efficiency of 42.48%and 41.31%,respectively.关键词
熔盐储能/火电机组改造/深度调峰/灵活性运行Key words
molten salt energy storage/thermal power unit renovation/deep peak shaving/flexible operation引用本文复制引用
张祝,陈国庆,周小明,姜燕妮..670MW燃煤机组耦合熔盐储能系统方案设计及性能分析[J].热力发电,2024,53(3):89-98,10.基金项目
国家自然科学基金面上项目(51976080) （51976080）
清洁高效燃煤发电与污染控制国家重点实验室技术创新项目(D2022fk096) （D2022fk096）
江苏省特种设备安全监督检验研究院科技计划项目(KJ(Y)202409)General Program of the National Natural Science Foundation of China(51976080) （KJ(Y）
Technical Innovation Project of Clean and Efficient Coal Fired Power Generation and Pollution Control State Key Laboratory(D2022fk096) （D2022fk096）
Science and Technology Plan Project of Jiangsu Special Equipment Safety Supervision and Inspection Research Institute(KJ(Y)202409) （KJ(Y）
