실데이터 분석을 통한 지역난방 열배관의 피로안전성 평가 = Fatigue Evaluation of District Heat Pipes based on the Measured Data

국문 초록 (Abstract)

지역난방 시스템의 주요 구성요소의 하나인 열배관은 크게 공급관과 회수관으로 구분되며, 지역난방에서의 열수송 배관은 난방수의 온도변화에 따른 열응력을 받게 되므로 공용년수 증가에 따라 열응력에 의한 피로현상이 발생하게 된다. 한편 지역난방 열배관은 사용자배관의 공용조건에 따라 다양한 특성을 나타내며 이러한 불규칙한 온도변화는 열배관의 피로에 악영향을 미치게 된다. 따라서 본 연구에서는 기 매설된 공용중인 지역별 열배관에 대해 현장계측을 실시하고 각 지역의 데이터를 분석하였다. 또한 사이클기반 피로평가법 및 응력기반 피로평가법을 통하여 지역난방 열배관의 피로안전성을 평가하였다.

다국어 초록 (Multilingual Abstract)

Heating pipes, which are among the main equipment in district heating systems, can be classified into supply and return pipes. Because when the district heating transmission pipe, which is charged with district heating in small to medium-size cities, is under thermal stress during temperature variances in heating water, it suffers from the fatigue phenomenon caused by the thermal stress, according to the number of its service years. District heatingpipes have shown various characteristics according to the operating condition of the service connections, and the irregular temperature variance has had a bad influence on fatigue heating pipes. Therefore, in this study, a field test on laid heating pipes was performed, and the data for each region were analyzed. Also, the fatigue safety of district heating pipes was evaluated via cycle-based evaluation and stress-based evaluation.

참고문헌 (Reference)

1 장윤석, "운전이력을 고려한 지역난방 열배관의 피로수명 평가 및 관리 체계 구축" 대한기계학회 29 (29): 1235-1242, 2005

2 한국지역난방공사, "열공급규정"

3 IEA District Heating and Cooling, "Temperature Variations in Preinsulated DH Pipes Low Cycle Fatigue" 18-40, 1996

4 한국공업규격, "KS기준 D3562, 압력배관용 탄소 강관"

5 Chang, Y. S., "Fatigue data acquisition, evaluation and optimization of district heating pipes" 27 : 2524-2535, 2003

6 IEA District Heating and Cooling, "Fatigue Analysis of District Heating Systems" 13-33, 1999

7 LUSAS Version 14, "Examples Manual" 193-206, 2010

8 European District Heating Pipe Manufacturers Association, "District Heating Handbook" 124-131, 1997

9 European Standard Norme Europeenne Europaische Norm, "Design of Steel Structure, Part 1. 9 : Fatigue" 14-29, 2004

10 Miner,M.A, "Cumulative damage in Fatigue" 67 : 159-, 1945

11 ASTM, "CarbonSteel, Low and Intermediate-Tensil Strength, A672 and A 285/A285M Pressure Vessel Plates"