ORC发电机组不锈钢换热管裂漏失效机制分析及预防  

Failure mechanism and prevention of cracking and leakage of stainless steel heat exchange tube for ORC generator unit

作　　者：刘纯虎 王泽宽 Liu Chunhu;Wang Zekuan(Nanjing TICA Climate Solutions Co.,Ltd.)

机构地区：[1]南京天加环境科技有限公司

出　　处：《制冷与空调》2024年第12期51-53,共3页Refrigeration and Air-Conditioning

摘　　要：换热管作为有机朗肯循环(ORC)发电机组管壳式换热器的核心零部件,其渗漏会导致换热效率降低、维修成本增加。通过分析不锈钢换热管在工厂焊接及试运行阶段出现裂漏的失效机制发现,失效原因为铜管定位工装时焊接工艺不当产生渗透热裂纹,指出通过固定铜管定位工装参数、稳定焊接及冷却参数可以有效预防该类失效的发生。As the core component of the shell and tube heat exchanger of the organic Rankine cycle(ORC)generator unit,the leakage of the heat exchange tube will decrease heat exchange efficiency and increasemaintenance cost.By analyzing the failure mechanism of cracking and leakage of the stainless steel heat exchange tube during the factory welding and test run,it is found that the failure reason is the osmotic heat crack caused by the improper welding process of the copper tube positioning fixture,which can be effectively solved and prevented by fixing the parameters of the copper tube positioning fixture,stabilizing the welding and cooling parameters.

关 键 词：发电机组 管壳式换热器 换热管 裂漏 铜脆 晶体扩散机制 

分 类 号：TM31[电气工程—电机] TG441.7[金属学及工艺—焊接]