Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

An Experimental Study for the Liquid Freezing Phenomena in a Pipe During Ice Plugging

결빙 관막음시 배관내 유체 결빙현상의 실험적 연구

  • Published : 2001.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

The ice plugging process consists of placing liquid nitrogen around a pipe and removing heat until the water in the pipe freezes and provides a solid plug or seal against fluid movement. This technique enables us to repair or inspect a pipe system without shutdown of entire system. A set of test apparatus for investigation of the liquid freezing phenomena during ice plugging is prepared. This study shows the characteristics of the liquid freezing and the heat transfer with various pipe and freezing jacket conditions. And in case there is flow of the fluid inside the pipe, the flow rate which can be able to form the ice plug is identified with the effect of the pipe diameter and freezing jacket length on the plug formation. The permissible maximum flow rate for the complete plug formation is approximately proportional to the freezing jacket length at the same pipe diameter condition.

Keywords

References

  1. 박영돈, 변상규, 강범수, 1998, '배관의 결빙에 의한 열변형 및 열응력 해석,' 대한기계학회논문집 A권 제22권 제1호, pp. 227-237
  2. 박영돈, 이민우, 구태완, 김귀순, 강범수, 1999, '배관의 Ice Plugging에 의하여 유발되는 열응력의 실험적 규명,' 대한기계학회논문집 A권, 제23권 제7호, pp. 1094-1103
  3. 한국전력공사원자력건설처, 1980, 해외 연수 보고서
  4. Burmeister, L., C., 1993, Convective Heat Transfer, John Wiley & Sons
  5. Bowen, R. J., 1997, Introduction Physical Separation & Multiphase Research Group, University of Southampton
  6. Burton, M. J., 1986, 'An Experimental and Numerical Study if Plug Formation in Vertical Pipes During Pipe Freezing,' Ph.D Thesis, University of Southampton, U. K.
  7. Tavner, A. C. R., Bowen, R. J. and Bishop, C. W., 1996, 'Heat Flux Monitoring Cryogenic Pipe Freezing : A Case Study,' Institution of Chemical Engineers, Vol. 74, pp. 239-241
  8. Keary, A. C. and Bowen, R. J., 1998, 'Analytical Study of the Effect of Natural Convection on Cryogenic Pipe Freezing,' International Journal of Heat and Mass Transfer, Vol. 41, No 10, pp. 1129-1138 https://doi.org/10.1016/S0017-9310(97)00269-X
  9. EPRI Nuclear Maintenance Applications Center, 1989, Freeze Sealing(plugging) of Piping, A Guide for Nuclear Power Plant Maintenance Personnel, EPRI
  10. 서정세, 김무근, 노승탁, 임장순, 1998, '협착 관내 층류유동에서 물의 결빙현상,' 공기조화냉동공학논문집 제10권 제1호, pp. 11-21
  11. 서정세, 노승탁, 1997, '동심원관 환상공간내의 완전히 발달된 층류유동에서 물의 결빙현상에 대한 해석,' 대한기계학회논문집 B권, 제21권 제11호, pp. 1552-1561