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

The Korean Society of Mechanical Engineers (대한기계학회)
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Establishment of Fatigue Life Evaluation and Management System for District Beating Pipes Considering Operating Temperature Transition Data

운전이력을 고려한 지역난방 열배관의 피로수명 평가 및 관리 체계 구축

  • 장윤석 (성균관대학교 기계공학부) ;
  • 정성욱 (성균관대학교 기계공학부) ;
  • 김형근 (성균관대학교 기계공학부) ;
  • 최재붕 (성균관대학교 기계공학부) ;
  • 김상호 (한국지역난방공사 연구개발실) ;
  • 김연홍 (한국지역난방공사 연구개발실) ;
  • 김영진 (성균관대학교 기계공학부)
  • Published : 2005.09.01
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Abstract

A district heating(DH) system supplies environmentally-friend heat and is appropriate for reduction of energy consumption and/or air pollutions. The DH transmission pipe, composed of supply and return pipes, has been used to transmit the heat and prevent heat loss during transportation. The two types of pipes are operated at a temperature of $75\~115^{\circ}C\;and\;40\~65^{\circ}C$, respectively, with an operating pressure of less than 1.568MPa. The objectives of this paper are to systematize data processing of transition temperature and investigate its effects on fatigue life of DH pipes. For the sake of this, about 5 millions temperature data were measured during one year at ten locations, and then available fatigue lift estimation schemes were examined and applied to quantify the specific thermal fatigue life of each pipe. As a result, a relational database management system as well as reliable fatigue lift evaluation procedures is established for Korean DH pipes. Also, since the prototypal evaluation results satisfied both cycle-based and stress-based fatigue criteria, those can be used as useful information in the future fer optimal design, operation and energy saving via setting of efficient condition and stabilization of water temperature.

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References

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