空冷凝汽器温度场红外成像及应用试验研究  

Research on Infrared Imaging of Air Cooling Condenser Temperature Field and Application Test

作　　者：王岗 WANG Gang(Inner Mongolia Datang International Tuoketuo Power Generation Co.,Ltd.,Hohhot,Inner Mongolia 010206,China)

机构地区：[1]内蒙古大唐国际托克托发电有限责任公司,内蒙古呼和浩特010206

出　　处：《东北电力技术》2020年第12期13-15,34,共4页Northeast Electric Power Technology

基　　金：中国大唐集团公司重点攻关科技项目(10000075D19KJFYQJ002-SB10XX001)。

摘　　要：针对直接空冷凝汽器温度测点有限导致的防冻压力大、风机运行不合理等问题,应用红外热像仪对某600 MW机组直接空冷岛温度场进行成像,并指导风机优化运行。试验表明,直接空冷凝汽器存在一个沿蒸汽流动方向宽度很窄但温度梯度大、横跨整个逆流区或顺流区的温度转变区,转变区上游温度与蒸汽温度一致,下游温度与环境风温一致,转变区的位置直接反映空冷岛系统运行状态的好坏。温度转变区存在最佳位置,实际位置与最佳位置的偏差可用于指导风机优化运行。试验结果对温度场测温电缆布置也具有一定参考作用。Aiming at the problems of high anti-freezing pressure and unreasonable operation of the fan caused by limited temperature measuring points of direct air cooling condenser(ACC).An infrared thermal imager is applied to image the temperature field of a 600 MW direct ACC and guide the fan to optimize operation.The test results show that there is a narrow temperature transition zone with large temperature gradient,which spans the whole counter-flow zone or down-flow zone.The temperatures in the upstream and downstream region of the transition zone are consistent with the steam temperature and the ambient temperature respectively.The position of the transition zone,which has an optimal location directly reflects the operation state of the ACC system.The deviation between the actual location and the optimal location can be used to guide the optimal operation of the fan.The test results also have reference value for the cable layout of temperature field measurement.

关 键 词：空冷凝汽器 温度场 温度转变区 防冻 

分 类 号：TM621[电气工程—电力系统及自动化]