배열회수보일러의 부하변동 운전에 따른 과열기 튜브들의 응력거동
Stress Behaviors of Superheater Tubes under Load Change Operation in HRSG
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초록
The purpose of this study is not only to evaluate the stress behavior of tubes in superheater in HRSG during the load change operation but also to find root causes of failure from stress behavior. Firstly, temperature during operation was collected to perform stress analysis from actual HRSG. Part load and full load stress analysis which can be represented as the whole load change operations were performed using commercial finite element software. The possibility that can lead to tubes failure is found by stress analysis and its results is compared with metallurgical mircrostructure of failed tube which was taken from actual HRSG.
Abstract
The purpose of this study is not only to evaluate the stress behavior of tubes in superheater in HRSG during the load change operation but also to find root causes of failure from stress behavior. Firstly, temperature during operation was collected to perform stress analysis from actual HRSG. Part load and full load stress analysis which can be represented as the whole load change operations were performed using commercial finite element software. The possibility that can lead to tubes failure is found by stress analysis and its results is compared with metallurgical mircrostructure of failed tube which was taken from actual HRSG.
참고문헌 (5)
- Hechmer, J. L., "Three-Dimensional Stress Criteria", proceedings ASMEPVP, 210(2), pp.181~191 (1991), San Diego, CA
- ASME, "ASME Boiler and Pressure Vess el Code, Section VIII, Rules for Construc tion of Pressure Vessels, Division 2 - Alternate Rules, 2007 Edition", The American Society of Mechanical Engineers (2007), Ne w York, NY.
- ASME, "Criteria of the ASME Boiler and Pressure Vessel Code for Design by Analysis in Section III and VIII" (1969), Division 2
- Mackenzie, D., "A Comp utational Procedure Calculating Primary Stress for the ASME B&PV Code", AS ME Journal of Pressure Vessel Technology, 116, pp.339~344 (1994)
- "prEN 133445-3 Annex 2" (2002), Design By An alysis