火力发电厂相变换热器不稳定性实验研究  

Experimental Research on Instability of Phase-Change Heater in Thermal Power Plant

作　　者：何毅 汪家琼[2] 

机构地区：[1]上海连成集团苏州股份有限公司,江苏 苏州 [2]江苏大学,江苏 镇江

出　　处：《机械工程与技术》2021年第4期426-432,共7页Mechanical Engineering and Technology

摘　　要：火力发电厂相变换热器在机组灵活运行条件下运行不稳定会造成温度波动、温度迟滞、管路振动、噪声大等问题,来流介质气液两相流状态的不稳定性是相变换热器运行不稳定的诱因之一。本文从来流介质冷却过程的气液两相流不稳定性入手,研究相变换热器运行不稳定性的机理,并搭建了环路热管系统进行试验验证,探索抑制其运行不稳定性的方法,为火力发电厂相变换热器及管道的稳定运行提供参考。The unstable operation of the phase-change heat exchanger of the thermal power plant under the flexible operating conditions of the unit will cause problems such as temperature fluctuation, tem-perature hysteresis, pipeline vibration, and loud noise. The instability of the gas-liquid two-phase flow of the incoming medium is one of the causes of the unstable operation of the phase change heat exchanger. The current paper studied the mechanism of gas-liquid two-phase flow instability in the cooling process which was the reason for the instability of the phase change heat exchanger. The current paper set up a loop heat pipe system for test verification and studied the method of suppressing the instability of the phase change heat exchanger. These studies provide references for the stable operation of phase-change heat exchangers and pipelines in thermal power plants.

关 键 词：相变换热器 两相流不稳定性 理论研究 实验研究 火力发电 

分 类 号：TM6[电气工程—电力系统及自动化]