基于有限差分法的烟气–熔盐储热系统运行模式转换的瞬态分析
Transient Analysis of Operational Modes for Flue Gas-Molten Salt Heat Storage System Based on the Finite Difference Method
DOI: 10.12677/se.2026.164009, PDF,   
作者: 曾华斌, 陈正豫:华北电力大学核科学与工程学院,北京;郭闻韬*:华北电力大学核科学与工程学院,北京;华北电力大学核能非能动安全技术北京市重点实验室,北京
关键词: 烟气–熔盐换热器有限差分法熔盐储热动态仿真Flue Gas-Molten Salt Heat Exchanger Finite Difference Method Molten Salt Thermal Storage Dynamic Simulation
摘要: 本文基于有限差分法建立瞬态仿真模型,分析了世界首台烟气–熔盐储热系统的稳态与瞬态特性。在额定工况下,烟气出口、熔盐出口和换热管束的平均稳态温度分别为301.46℃、388.82℃和317.05℃。采用额定烟气流量,启动预热至目标温度,储热启动需要279.9秒,伴热启动需要812.6秒。退出过程中,冷却至200℃所需时间:储热退出为59.8小时,伴热退出为101.3小时;进一步冷却至25℃则分别需要588.8小时和736.0小时。本文为该类系统的设计与运行提供了理论与实践指导。
Abstract: This paper develops a transient simulation model based on the finite difference method to analyze the steady-state and transient characteristics of the world first flue gas–molten salt thermal storage system. At rated conditions, steady-state temperatures are 301.46˚C, 388.82˚C, and 317.05˚C for the flue gas outlet, molten salt outlet, and average heat exchange tubes bundle, respectively. Using the rated flue gas flow, startup preheating to the target temperatures requires 279.9 s for thermal storage and 812.6 s for thermal preservation. During shutdown, cooling to 200˚C takes 59.8 h (thermal storage) and 101.3 h (thermal preservation); cooling further to 25˚C requires 588.8 h and 736.0 h, respectively. This work provides theoretical and practical guidance for the design and operation of such systems.
文章引用:曾华斌, 陈正豫, 郭闻韬. 基于有限差分法的烟气–熔盐储热系统运行模式转换的瞬态分析[J]. 可持续能源, 2026, 16(4): 93-108. https://doi.org/10.12677/se.2026.164009

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