Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

The Freezing Process of the Water Supply Pipe in an Exterior Wall

외벽측 급수관의 동결 과정에 관한 연구

  • Kang, Han-Gi (Department of Mechanical Engineering, Graduate School of Hanyang Univ.) ;
  • Lee, Jae-Heon (Department of Mechanical Engineering, Hanyang Univ.)
  • 강한기 (한양대학교 대학원 기계공학과) ;
  • 이재헌 (한양대학교 공과대학 기계공학부)
  • Published : 2007.11.10
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the freezing process of the water supply pipe in the exterior wall of an apartment house was analyzed by numerical method. The thickness of the pipe insulation and the percentage of insulation damage were considered as parameters in this paper. In the cases of the 0%, 8% and 20% damaged of the 5mm thickness insulation, the freezing was completed after 13 hours, 10 hours and 7 hours respectively. And in cases of the 10mm thickness insulation, the freezing was completed after 18 hours, 10.5 hours and 8 hours respectively. As a result, it is predicted that the water freezing would occurred when the water supply pipe with 8% or 20% damaged insulation are installed in the exterior wall. However, the water freezing would not occurred when the water supply pipe with 10mm thickness insulation of 0% damage is installed in the exterior wall.

Keywords

References

  1. KNHC, 2003, Building equipment design handbook, Korea National Housing Corporation
  2. KNHC, 2005, Technical Guidelines: Building Equipment, Korea National Housing Corporation
  3. SAREK, 2005, Building mechanical system design guidelines, Ministry of Construction & Transportation
  4. Kim, Y. H. and Park, J. W., 1999, The newest air conditioning system, Bomoondang, Inc
  5. Swaminathan, C. R and Voller, V. R, 1992, A general enthalpy method for modeling solidification process, metallurgical transactions B, Vol. 23B, pp. 651-664
  6. Hibbert, S. E., Markatos, N. C. and Voller, V. R, 1988, Computer simulation of moving-interface, convective, phase-change processes, Int. J. Heat Mass Transfer, Vol. 31, No.9, pp.1785-1795 https://doi.org/10.1016/0017-9310(88)90193-7
  7. Kim, H. K, Jeong, S. Y., Hur, N. K, Lim, T. W. and Park, Y. S., 2007, Numerical analysis of the melting process of ice using plate heaters with constant heat flux, Korean Journal of Air-conditioning and Refrigeration Engineering, Vol. 19, No.6, pp. 434-440
  8. SAREK, 1996, Development of the standard computer software and weather data for cooling and heating load calculation, Ministry of Commerce, Industry and Energy