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

  • 제26권10호
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  • Pages.453-459
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  • 2014
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Determining Initial Ignoring Time for the Analysis of Ground Thermal Conductivity of SCW Type Ground Heat Exchanger

SCW형 지중 열교환기의 지중 열전도도 해석에서 초기제외시간 결정에 관한 연구

  • Chang, Keun-Sun (Department of Mechanical Engineering, SunMoon University) ;
  • Kim, Min-Jun (Department of Mechanical Engineering, Graduate School of SunMoon University) ;
  • Kim, Young-Jae (Department of Environmental and Bio-chemical Engineering, SunMoon University)
  • 장근선 (선문대학교 기계공학과) ;
  • 김민준 (선문대학교 대학원 기계공학과) ;
  • 김영재 (선문대학교 환경생명화학공학과)
  • 투고 : 2014.06.03
  • 심사 : 2014.08.04
  • 발행 : 2014.10.10
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초록

This paper presents an analysis on the initial ignoring time of SCW type GHX using Mean Square Error method. Line source method is a useful method for estimating the ground thermal conductivity for the vertical type and SCW type GHX in Korea. The line source method for ground thermal conductivity of geothermal in-site test is the basis of linear approximation between the temperature of a borehole and logarithmic time in a GHX. To apply the line source method to the estimation of SCW type GHX, it is necessary to ignore the initial time of data at the stage of a linear approximation. This paper proposed a new initial ignoring time of SCW type GHX among various initial ignoring time at the time for reaching MSE of $0.02^{\circ}C^2$.

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참고문헌

  1. Ministry of Knowledge Economy, 2012, Standards of support, Installation, and Management for New and Renewable Energy System, Ministry of Knowledge Economy Announcement, 2012-3.
  2. Gehlin, S. E. A., 2002, Thermal response test -method development and evaluation, Ph.D Thesis, Lulea University of Technology, Lulea, Sweden,
  3. Ingersoll, L. R., Adler, F. T., Plass, H. J., and Ingersoll, A.C., 1951, Theory of earth heat exchangers for the heat pump, ASHVE Transaction, Vol. 57, pp. 167-188.
  4. Lee, S. K., Woo, J. S., and Kim, D. G., 2008, A study of Determining Initial Ignoring Time of Line Source Model used in Estimating the Effective Soil Formation Thermal Conductivities. Journal of Energy Engineering, Vol. 17, No. 3, pp. 167-174.
  5. Kim, M. J. and Choi, C. H., 2013, A study on the KS (Korea Standard) of SCW type ground heat exchanger, Journal of Geothermal Energy, Vol. 9, No. 4, pp. 39-46.
  6. Choi, H. S., Choi H. J., Lee, C. H., and Yun, M. S., 2013, A assessment ground thermal conductivity for SCW type ground heat exchanger design, Journal of Geothermal Energy, Vol. 9, No. 3, pp. 67-73.
  7. Kim, M. J. and Chang, K. S., 2013, SCW type ground heat exchanger analysis using borehole photo shoot, Journal of Geothermal Energy, Vol. 9, No. 4, pp. 47-54.

피인용 문헌

  1. Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2014 vol.27, pp.7, 2015, https://doi.org/10.6110/KJACR.2015.27.7.380