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Design Validation and Improvement of District Heating Pipe Using FE Simulation

유한요소 시뮬레이션을 통한 지역난방열배관 특성 평가 및 강화이형관의 제안

  • 김주용 (인하대학교 기계공학과 대학원) ;
  • 김호범 (인하대학교 기계공학과 대학원) ;
  • 고현일 (한국지역난방공사) ;
  • 안영모 (한국지역난방공사) ;
  • 조종두 (인하대학교 기계공학과)
  • Published : 2009.04.01

Abstract

This paper investigates the reliability of district heating pipes at thermo-elastic fatigue loading. District heating pipes, subjected to $120^{\circ}C$ and $16kg_f/cm^2$ due to water distributing service through inside the pipes, should endure long term cyclic thermal-mechanical loadings. The heating pipes are the co-centric tubes of steel pipe, poly urethane(PUR) insulator, and high density poly ethylene(HDPE) case. On installation, foam pad is externally wrapped for accommodating stress reduction near the bend sections of pipes. However, there have been frequent reports on the failures of bend sections in the middle of long term service. This study scrutinizes the observed failures near the bend sections through applying the finite element methods. Specially in this study, heating pipes are studied on the influence of foam padding on failures and proposed new designs for reinforced bend without foam pad.

Keywords

District Heating Pipe;Foam Pad;Thermal Stress;FE Simulation;Reinforced Fitting

References

  1. Korea District Heating Corporation, 2003, A Construction guidebook of District Heating Pipe facilities, KDHC DH Pipe Network Division, Vol. 2, pp. 225-240
  2. Soil Material Property/Young's Soil Modulus http://www.geotechnicalinfo.com
  3. Peter Randlov, 1997, 'District Heating Handbook,' European District Heating Pipe Manufacturers Association, pp. 131-138
  4. ANSYS Workbench Release 11.0, ANSYS Inc., 2007
  5. Mackenzie-Kennedy, C., 1979, 'District Heating Thermal Generation and Distribution,' Pergamon Press, pp. 133-154
  6. Korean Industrial Standards

Cited by

  1. Experimental Study for the Reinforcement of District Heating Pipe vol.40, pp.3, 2016, https://doi.org/10.3795/KSME-A.2016.40.3.245
  2. Shape Design of Bends in District Heating Pipe System by Taguchi Method vol.34, pp.3, 2010, https://doi.org/10.3795/KSME-A.2010.34.3.307