基于热工水力耦合求解的电站锅炉炉管壁温研究  

Study on Tube Wall Temperature of Power Plant Boilers Based on Coupled Thermal Hydraulic Analysis

作　　者：余岳溪[1] 廖宏楷[1] 吴燕玲[2] 钟崴[2] 

机构地区：[1]广东电网公司电力科学研究院,广州510080 [2]浙江大学热工与动力系统研究所,杭州310027

出　　处：《动力工程学报》2015年第1期1-7,共7页Journal of Chinese Society of Power Engineering

摘　　要：提出了一种对锅炉高温区烟气空间进行网格化划分的方法,建立了相应的过热器炉管壁温的三维分片分段计算模型,通过炉膛燃烧和传热机理在线计算得到高温区烟气温度,并通过迭代方法在线耦合求解各管段的传热量以及各管路中工质的质量流量,最终计算得到过热器各管路和各管段的壁温.结果表明:根据所提出模型和算法而研发的"电站锅炉炉管运行安全远程监测管理"子系统较为精确地实现了炉管壁温的在线分析计算和超温预警,对火电机组的安全稳定运行具有积极意义.A three-dimensional sliced and segmented calculation model was established for tube wall tem- perature of superheater by meshing the high-temperature flue gas region of boiler, with which the flue gas temperature in high-temperature region was on-line calculated based on furnace combustion and heat trans- fer mechanism, while the heat flux of all tubes and working fluid mass flow in parallel pipelines were ob- tained using iteration method, and finally the wall temperature of all pipelines and tube segments was cal- culated. Results show that the ＂Remote Monitoring Subsystem for Furnace Tube Safety Operation of Pow- er Plant Boilers＂ developed according to the model and algorithm proposed above is able to perform precise online analysis, calculation and overheating warning of tube wall temperature, which is therefore of posi- tive significance to the safety and stable operation of thermal power units.

关 键 词：锅炉 过热器 炉管壁温 在线计算 热工水力计算 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]