某空冷机组凝汽器防冻策略研究  

Analysis of anti-freezing strategy for the condenser of an air cooling unit

作　　者：吝江 曲桂阳 任志兴 刘颖 万逵芳 LIN Jiang;QU Gui-yang;REN Zhi-xing;LIU Ying;WAN Kui-fang

机构地区：[1]河北蔚州能源综合开发有限公司,河北张家口075700 [2]大唐华北电力试验研究院,北京100040

出　　处：《节能》2023年第12期104-107,共4页Energy Conservation

摘　　要：针对某直接空冷机组冬季背压偏高的问题,现场测试空冷凝汽器的温度分布情况,分析翅片管内气体温度的变化规律,并对防冻参数设定值与负荷关系进行研究。结果显示:空冷凝汽器换热不均和触发防冻保护的参数值未考虑负荷因素是运行背压偏高的主要原因,给出了不同负荷下低背压报警、凝结水温度、抽气温度等防冻参数设定值的计算方法,为同类机组冬季运行提供参考。In view of the higher back pressure of a direct air cooling unit,the temperature distribution of the air-cooled condenser(ACC) was tested,the gas temperature variation law in the finned tubes was analyzed,and the relationship between the antifreeze parameter settings and the load was studied.The results show that the uneven heat transfer of the ACC and the parameters triggering anti-freeze protection which failure to consider the load factor are the main reasons for the higher back pressure.Formulas for calculating the set values of anti-freezing parameters such as low back pressure warning,condensate temperature and extraction temperature under different loads are given,which can be referenced for the operation of similar units in winter.

关 键 词：直接空冷机组 空冷凝汽器 防冻策略 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程]