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。
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.
作者
王斌
刘金恺
姜晓霞
白宁
鹿院卫
WANG Bin;LIU Jinkai;JIANG Xiaoxia;BAI Ning;LU Yuanwei(Qinghai Huanghe Hydropower Development Co.,Ltd.,Xi'ning 810008,Qinghai,China;State Power Investment Corporation Research Institute,Beijing 102209,China;National User-Side Energy Storage Innovation Research and Development Center,Beijing 102209,China;Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology,Beijing 100124,China)
出处
《储能科学与技术》
北大核心
2025年第7期2729-2737,共9页
Energy Storage Science and Technology
关键词
燃煤机组
熔盐储热
调峰
灵活性
经济性分析
coal-fired power unit
molten salt heat storage
peak shaving
flexibility
economy analysis
