Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Thermal-structural Analysis and Fatigue Life Evaluation of a Parallel Slide Gate Valve in Accordance with ASME B&PVC

패러럴 슬라이드 게이트밸브의 열구조해석 및 ASME B&PVC 기반 피로수명 평가

  • Kim, Tae Ho (Dept. of Mechanical Design Engineering, Andong Nat'l Univ.) ;
  • Choi, Jae Seung (Key Valve Technologies Ltd.) ;
  • Han, Jeong Sam (Dept. of Mechanical Design Engineering, Andong Nat'l Univ.)
  • 김태호 (안동대학교 기계설계공학과) ;
  • 최재승 ((주)키밸브기술) ;
  • 한정삼 (안동대학교 기계설계공학과)
  • Received : 2016.08.02
  • Accepted : 2016.12.05
  • Published : 2017.02.01
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Abstract

A parallel slide gate valve (PSGV) is located between the heat recovery steam generator (HRSG) and the steam turbine in a combined cycle power plant (CCPP). It is used to control the flow of steam and runs with repetitive operations such as startups, load changes, and shutdowns during its operation period. Therefore, it is necessary to evaluate the fatigue damage and the structural integrity under a large compressive thermal stress due to the temperature difference through the valve wall thickness during the startup operations. In this paper, the thermal-structural analysis and the fatigue life evaluation of a 16-inch PSGV, which is installed on the HP steam line, is performed according to the fatigue life assessment method described in the ASME B&PVC VIII-2; the method uses the equivalent stress from the elastic stress analysis.

패러럴 슬라이드 게이트밸브는 복합발전플랜트 배열회수보일러와 증기터빈 사이에 위치하여 증기유동의 흐름을 제어하는 밸브로서 운전기간 동안 기동, 부하변동 및 정지 등의 운전이 반복적으로 이루어진다. 따라서, 각 기동운전 중에 밸브 두께 방향의 온도 차이로 인하여 발생하는 큰 압축 열응력으로 인한 피로손상 및 구조건전성에 대한 평가가 필요하다. 본 논문에서는 배열회수보일러의 주중기 밸브로 설치되는 16인치 패러럴 슬라이드 게이트밸브의 피로수명 평가를 위한 열구조해석 및 ASME B&PVC VIII-2에서 제시된 탄성응력해석 및 등가응력에 기반한 피로수명 평가를 수행하였다.

Keywords

References

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