바로가기메뉴

본문 바로가기 주메뉴 바로가기

(사)한국터널지하공간학회

ISSN : 2233-8292

Article Contents

Prev Next
e-Submission

Vol.19 No.2

Citation Share

Development of numerical model for estimating thermal environment of underground power conduit considering characteristics of backfill materials

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2017, v.19 no.2, pp.121-141
https://doi.org/10.9711/KTAJ.2017.19.2.121





& (2017). Development of numerical model for estimating thermal environment of underground power conduit considering characteristics of backfill materials. (사)한국터널지하공간학회, 19(2), 121-141, https://doi.org/10.9711/KTAJ.2017.19.2.121

Abstract

The thermal analysis of an underground power conduit for electrical cables is essential to determine their current capacity with an increasing number of demands for highvoltage underground cables. The temperature rises around a buried cable, caused by excessive heat dissipation, may increase considerably the thermal resistance of the cables, leading to the danger of “thermal runaway” or damaging to insulators. It is a key design factor to develop the mechanism on thermal behavior of backfilling materials for underground power conduits. With a full-scale field test, a numerical model was developed to estimate the temperature change as well as the thermal resistance existing between an underground power conduit and backfill materials. In comparison with the field test, the numerical model for analyzing thermal behavior depending on density, moisture content and soil constituents is verified by the one-year-long field measurement.

keywords
Underground power conduit, Electrical cables, Thermal runaway, Thermal resistance, Backfill materials., 지중전력구, 전력케이블, 열폭주, 열저항, 되메움재

Reference

1.

1. Adams, J., Baljet, A.F. (1980), “The thermal behavior of cable backfill materials”, IEEE Transactions on power apparatus and systems, Vol. PAS-87, No. 4, Ontario Hydro, Toronto, Canada

2.

2. Anderson, B. (2006), Convections for U-value calculation, BRE Scotland, pp. 19-20.

3.

3. ASHRAE Handbook-Fundamentals, 2009.

4.

4. Boggs, S.A., Chu, F.Y., Radhakrishna, H.S., Steinmanis, J. (1980), “Measurement of soil thermal properties – techniques and instrumentation”, IEEE Transactions on Power Apparatus and Systems, Vol. PAS-99, No.2, Ontario Hydro, Toronto, Canada.

5.

5. Choi, J-M, Cho, S-W (2011), “The Characteristic of Convective Heat Transfer Coefficient by Natural Heat Transfer Coefficient and Forced Heat Transfer Coefficient” Journal of the Architectural Institute of Korea (Korean), Vol. 27, No. 6, pp. 205-212.

6.

6. Churchill, S.W., Chu, H.H.S. (1975), “Correlating equation for laminar and turbulent free convection a vertical plate”, International Journal of Heat and Mass Transfer, Vol. 18, p. 1323.

7.

7. Jeong, S.H., Kim, D.K., Choi, S.B., Nam, K.Y., Ryoo, H.S., Kang, J.W., Jang, T.I. (2003), “A study on the conductor temperature estimation of underground power cables considering the load current change”, Journal of the Korean Institute of Electrical Engineers (Korean), 2003.7, pp. 247-249.

8.

8. Kim, D.H., Lee, D.S. (2002), “Thermal resistivity of backfill materials for underground power cables”, Journal of the Korean Geotechnical Society (Korean), Vol. 18, No. 5, pp. 209-220.

9.

9. Kim, Y.S., Koo, H.W. (2011), “Resistivity characteristic of the backfill materials for underground power cables”, KSCE 2011 Convention.

10.

10. Kimura, K. (1997), Scientific basis of air conditioning, London Applied Science Publishers Ltd.

11.

11. Oh, K.D., Kim, D.H., Kim, K.R. (2008), “Fundamental properties and thermal resistance of recycled aggregates for backfilling”, Report Korea Electric Power Corporation, KEPRI.

12.

12. Tanaka, T., Adachi, T., Takeda, H., Tsuchiya, T., (1997), The latest architectural environmental engineering. pp. 164-165.

13.

13. Wi, J., Hong, S-Y, Lee, D-S, Park, S., Choi, H. (2011), “Evaluation of compaction and thermal characteristics of recycled aggregates for backfilling power transmission pipeline”, Journal of the Korean Geotechnical Society (Korean), Vol. 27, No. 7, pp. 17-33.

14.

14. Yazdanian, M., Klems, J.H. (1994), “Measurement of the exterior convective film coefficient for windows in low-rise building”, ASHRAE Trasactions, Vol. 100, No. 1, pp. 1-15.

15.

15. Kim, D.Y., Lee, H.S. (2011), “A study on the design of tunnel lining insulation based on measurement of temperature in tunnel”, Journal of Korean Tunnelling and Underground Space Association, Vol. 13, No. 4pp. 319-345.

16.

16. Roh, J.H. (2012), “A study on the prediction of HLW Temperature from Natural Ventilation Quantity using CFD”, Tunnel and Underground Space, Vol. 22, No. 6, pp. 429-437.

17.

17. Yoo, J.O. (2013), “A numerical study on the characteristics of the smoke movement and the effects of structure in road tunnel fire”, Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 289-300.

18.

18. Churchill, S.W. Bernstein, M. (1997), “A correlating equation for forced convection from gases and liquids to a circular cylinder in crossflow”, Journal of Heat Transfer, Vol. 99, No. 2, pp. 300-307.

19.

19. Clauser, C., Hugenges, E. (1995), “Thermal conductivity of rocks and minerals”, Rock physics & phase relations: A handbook of physical constants, pp. 105-126.

20.

20. COMSOL Multiphysics (2012), “COMSOL multiphysics user guide (Version 4.3 a)”, COMSOL, AB.

21.

21. Patankar, S.V. (1980), “Numerical heat transfer and fluid flow”, CRC press.

(사)한국터널지하공간학회

e-Submission OA Policy