电阻式熔盐加热器动态建模与参数化分析  

Dynamic modeling and parametric analysis of resistance molten salt heater

作　　者：张国龙 居文平 常东锋[1,2] 张建元 雒青[1,2] 王伟 王东晔 耿如意 ZHANG Guolong;JU Wenping;CHANG Dongfeng;ZHANG Jianyuan;LUO Qing;WANG Wei;WANG Dongye;GENG Ruyi(Xi'an TPRI Energy Conservation Technology Co.,Ltd.,Xi'an 710054,China;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]西安西热节能技术有限公司,陕西西安710054 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2023年第9期155-161,共7页Thermal Power Generation

基　　金：国家重点研发计划项目(2019YFB1505400);西安热工研究院有限公司自主科技项目(GB-22-TZK12)。

摘　　要：采用Dymola软件建立以电阻式熔盐加热器为研究对象的动态模型,在验证模型有效性的基础上,重点研究了在电负荷和熔盐流量扰动下及不同布置方式下电阻式熔盐加热器的瞬态特性和内部温度场。研究结果表明:电负荷和熔盐流量大扰动对电阻式熔盐加热器动态特性的影响趋同,且分别在110 s和105 s时达到其极限工况;而二者协同扰动时,可大幅推迟其极限工况的发生;多个电加热器串联或并联布置能够减缓熔盐温度变化,但却增加了系统成本。研究结论可为电阻式熔盐加热器的设计、控制和调试提供参考。The dynamic model of resistive type molten salt heater was established by Dymola software,and the transient characteristics and internal temperature field of resistive type molten salt heater under electrical load and molten salt flow disturbance and different arrangement modes were studied on the basis of verifying the effectiveness of the model.The results show that the influence of large disturbance of electric load and molten salt flow on the dynamic characteristics of resistance type molten salt heater tends to be the same,and reaches its limit condition at 110 s and 105 s respectively.However,the occurrence of the limit condition can be greatly delayed when the two disturbances are coordinated.Multiple electric heaters arranged in series or in parallel can slow down the change of molten salt temperature,but increase the system cost.The research conclusion can provide reference for the design,control and debugging of resistance molten salt heater.

关 键 词：电阻式加热器 熔盐 动态模拟 参数扰动 DYMOLA 

分 类 号：TH122[机械工程—机械设计及理论]