Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
권호 표지

A Experimental and Numerical Studies of Thermal Flow Motion in a Geothermal Chamber

동결챔버내의 열 흐름에 관한 실험 및 수치해석적 연구

  • 송원근 (한국시설안전기술공단, 기술개발실) ;
  • 김영진 (한국건설기술연구원, 토질 및 기초연구그룹) ;
  • 이형일 (서강대학교 기계공학과)
  • Published : 2003.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Numerical and experimental studies were conducted on the temperature distribution of a buried steel pipe and surrounding granite frozen soils in the closed system. The relationship between unfrozen water content and temperatures was analysed by laboratory test. The thermal conductivity measurements were made to compare the results with a formula presented by Lachenbruch. A steel container model that consists of a freezing chamber and a buried circular steel pipe was built for the laboratory temperature measurements. The time temperature records were measured experimentally, and those records were compared with numerical results obtained from FEM analysis in order to verify the feasibility. The latent heat effect on the granite frozen soils in the numerical study was considered.

강관이 매설되어 있는 폐쇄형 시스템에서 동결된 화강토의 온도분포에 관한 수치해석 및 실험적 연구가 수행되었다. 실험을 통해 측정된 부동수분량의 온도상관식을 제시하였으며, Lachenbruch의 열전도율 식을 사용하여 열전도율 측정값을 비교·분석하였다. 원형 단면 강관이 매설된 모형토조의 동결챔버를 제작하여 동결토의 온도를 측정하고 유한요소 수치해석을 수행하여 실험 결과와 비교하였다. 수치해석시 동결된 화강토의 잠열효과가 고려되었다.

Keywords

References

  1. Konrad, J. M., and Morgenstern. N. R., 'Frost Heave Prediction of Chilled Pipelines Buried in Unfrozen Soils', Canadian Geotechnical Journal, Vol.21, 1984, pp.100-115 https://doi.org/10.1139/t84-008
  2. Anderson, D. H., and Morgenstern, N. R., 'Physics, Chemistry and Mechanics of Frozen Ground', Proceedings, 2nd International Conference on Permafrost, Yakutsk, U.S.S.R., 1973, pp.
  3. Tsytovich, N. A., The Mechanics of Frozen Ground, McGraw-Hill Book Company, New York, NY, 1975
  4. Dirksen, C., and Miller, R. D. 'Closed-System Freezing of Unsaturated Soil', Soil Science Society of America Proceedings, Vol.30, 1966, pp.168-173
  5. Hoekstra, P., 'Moisture Movement in Soils under Temperature Gradients with the Cold Side Temperature below Freezing', Water Resources Research, Vol.2, 1966, pp.241-250 https://doi.org/10.1029/WR002i002p00241
  6. Miller, R. D., 'Freezing and Heaving of Saturated and Unsaturated Soils', Highway Research Record, No.393, 1972, pp.1-11 https://doi.org/10.1029/WR002i002p00241
  7. Loch, J. P. G., and Kay, B. D., 'Water Redistribution in Partially Frozen, Saturated Silt under Several Temperature Gradients and Overburden Loads', Soil Science Society of American Journal, Vol.42, No.3, 1978, pp.400-406
  8. Hoekstra. P., 'Water Movement and Freezing Pressures', Soil Science Society of America Proceedings, Vol.33, 1969, pp.512-518 https://doi.org/10.2136/sssaj1978.03615995004200030005x
  9. Mageau, D., and Morgenstern, N. R., 'Observations on Moisture Migration in Frozen Soils', Canadian Geotechnical Journal, Vol.17, 1979, pp.54-60 https://doi.org/10.2136/sssaj1969.03615995003300040011x
  10. Harlan, R. L., 'Analysis of Coupled Heat-Fluid Transport in Partially Frozen Soil', Water Resources Research, Vol.9, No.5, 1973, pp.1314-1323 https://doi.org/10.1029/WR009i005p01314
  11. Guymon, G., and Luthin, J. N., 'A Coupled Heat and Moisture Transport Model for Arctic Soils', Water Resources Research, Vol.10, No.5, 1974, pp.995-1003 https://doi.org/10.1029/WR010i005p00995
  12. Kinosita, S., 'Soil-Water Movement and Heat Flux in Freezing Ground', Proceedings of Conference on Soil Water Problems in Cold Regions, Calgary, Alta., May, 1975, pp.6-7
  13. Outcalt, S., 'A Numerical Model of Ice Lensing in Freezing Soils', Proceedings, 2nd Conference on Soil Water Problems in Cold Regions, Edmonton, Alta., Sept., 1976, pp.1-2 https://doi.org/10.1029/WR009i005p01314
  14. Zhang, T. and Osterkamp, T. E., 'Considerations in Determining Thermal Diffusivity from Temperature Time Series using Finite Difference Methods', Cold Regions Science and Technology, Vol.23, 1995, pp.333-341 https://doi.org/10.1016/0165-232X(94)00021-O
  15. ABAQUS User's Manual, 2001, Version 6.1, Hibbitt, Karlsson and Sorensen, Inc., Pawtucket, RI
  16. Allen, H. S., and Maxwell, R. S., A Textbook of Heat, The MacMillan Co., London, U. K. 1959, p.123
  17. Feldman, G. M., The Calculation Method of the Temperature Regime for the Permafrost Ground, Isdatelstvo , 1973, p.254 https://doi.org/10.1016/0165-232X(94)00021-O
  18. Lachenbruch, A. H., Sass, J. H., Marshall. B. V., and Moses, T. H. Jr., 'Permafrost, Heat Flow, and the Geothermal Regime at Prudhoe Bay, Alaska', J. Geophys. Res., Vol.87(B11), 1982, pp.9301-9316 https://doi.org/10.1029/JB087iB11p09301
  19. 서상열, '다공질 암반토의 동상특성에 관한 실험적 연구', 국민대학교 토목공학과 박사학위논문, 2000