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COMPARISON OF VARIOUS TUBE TO HEADER ATTACHMENT DETAILS UNDER CYCLE SERVICE

机译:循环服务下各种管子与页眉连接细节的比较

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摘要

Heat recovery steam generator (HRSG) superheater outlet headers are exposed to cyclic stresses under varying transient operating conditions. Three different tube to header connections are analyzed. Cold, warm, and hot startup cycles are defined along with a load change cycle. These cycles are used to develop boundary conditions for a transient three dimensional finite element analysis of each detail. The results show that the highest stresses are away from the tube to header weld area. For the startup cycles analyzed, equations are presented for cycle life determination.
机译:热量回收蒸汽发生器(HRSG)过热器出口集管在变化的瞬态运行条件下承受循环应力。分析了三种不同的管与集管连接。定义了冷,热和热启动周期以及负载变化周期。这些循环用于为每个细节的瞬态三维有限元分析开发边界条件。结果表明,从管到集管焊接区域的应力最大。对于所分析的启动循环,给出了确定循环寿命的公式。

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