Geomechanics and Engineering

  • 제6권1호
  • /
  • Pages.79-98
  • /
  • 2014
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Thermal transfer behavior in two types of W-shape ground heat exchangers installed in multilayer soils

  • Yoon, Seok (Department of Civil and Environmental Engineering, Korean Advanced Institute for Science and Technology) ;
  • Lee, Seung-Rae (Department of Civil and Environmental Engineering, Korean Advanced Institute for Science and Technology) ;
  • Go, Gyu-Hyun (Department of Civil and Environmental Engineering, Korean Advanced Institute for Science and Technology) ;
  • Xue, Jianfeng (School of Applied Science and Engineering, Monash University) ;
  • Park, Hyunku (Division of Civil Engineering, Samsung C&T) ;
  • Park, Dowon (Department of Civil and Environmental Engineering, Korean Advanced Institute for Science and Technology)
  • 투고 : 2013.06.18
  • 심사 : 2013.09.16
  • 발행 : 2014.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents an experimental and numerical study on the evaluation of a thermal response test using a precast high-strength concrete (PHC) energy pile and a closed vertical system with W-type ground heat exchangers (GHEs). Field thermal response tests (TRTs) were conducted on a PHC energy pile and on a general vertical GHE installed in a multiple layered soil ground. The equivalent ground thermal conductivity was determined by using the results from TRTs. A simple analytical solution is suggested in this research to derive an equivalent ground thermal conductivity of the multilayered soils for vertically buried GHEs. The PHC energy pile and general vertical system were numerically modeled using a three dimensional finite element method to compare the results with TRTs'. Borehole thermal resistance values were also obtained from the numerical results, and they were compared with various analytical solutions. Additionally, the effect of ground thermal conductivity on the borehole thermal resistance was analyzed.

키워드

참고문헌

  1. Bennet, J., Claesson, J. and Hellstrom, G. (1987), "Multipole method to compute the conductive heat flows to and between pipes in a composite cylinder", Notes on Heat Transfer, 1987(3), Lund University, Lund, Sweden.
  2. Brandl, H. (2006), "Energy foundations and other thermo-active ground structures", Geotechnique, 56(2), 81-122. https://doi.org/10.1680/geot.2006.56.2.81
  3. Choi, H.S., Lee, C.H., Lim, J.H. and Yoon, M.S. (2012), "Study on heat exchange characteristics for PHC energy piles", Proceedings of Advances in Civil, Environmental, and Materials Research, Seoul, Korea, August.
  4. Choi, J.C., Lee, S.R. and Lee, D.S. (2011), "Numerical simulation of vertical ground heat exchangers: intermittent operation in unsaturated soil conditions", Comput. Geotechniques, 38(8), 949-958. https://doi.org/10.1016/j.compgeo.2011.07.004
  5. Cui, P., Li, X., Man, Y. and Fang, Z. (2011), "Heat transfer analysis of pile geothermal heat exchangers with spiral coils", Appl. Energy, 88(11), 4113-4119. https://doi.org/10.1016/j.apenergy.2011.03.045
  6. Florides, G. and Kalogirou, S. (2008), "First in situ determination of the thermal performance of a U-pipe borehole heat exchanger in Cyprus", Appl. Therm. Eng., 28(2-3), 157-163. https://doi.org/10.1016/j.applthermaleng.2007.03.026
  7. Gao, J., Zhang, X., Liu, J., Li, K. and Yang, J. (2008a), "Numerical and experimental assessment of thermal performance of vertical energy piles: an application", Appl. Energy, 85(10), 901-910. https://doi.org/10.1016/j.apenergy.2008.02.010
  8. Gao, J., Zhang, X., Liu, J., Li, K. and Yang, J. (2008b), "Thermal performance and ground temperature of vertical pile-foundation heat exchangers: A case study", Appl. Therm. Eng., 28(17-18), 2295-2304. https://doi.org/10.1016/j.applthermaleng.2008.01.013
  9. Hamada, Y., Saitoh, H., Nakamura, M., Kubota, H. and Ochifuji, K. (2007), "Field performance of an energy pile system for space heating", Energy. Build., 39(5), 517-524. https://doi.org/10.1016/j.enbuild.2006.09.006
  10. Incropera, F.P. and Burkhard, S. (1996), Fundamentals of Heat and Mass Transfer, (4th Edition), John Wiley & Sons.
  11. Ingersoll, L.R., Zobel, O.J. and Ingersoll, A.C. (1954), Heat Conduction with Engineering, Geological and Other Application, McGraw-Hill, New York.
  12. International Energy Agency (2010), Renewable Energy Essential, Geothermal.
  13. Jeong, S.S., Song, J.Y., Min, H.S. and Lee, S.J. (2010), "Thermal influential factors of energy pile", J. Korean Soc. Civil Eng., 30(6C), 231-239. [In Korean]
  14. Johnston, I.W., Narsilio, G.A. and Colls, S. (2011), "Emerging geothermal energy technologies", KSCE J. Civil Eng., 15(4), 643-653. https://doi.org/10.1007/s12205-011-0005-7
  15. Kavanaugh, S.P. and Rafferty, K. (1997), Ground-Source Heat Pump; Design of Geothermal Systems for Commercial and Institutional Buildings, ASHARE, Atlanta.
  16. Lee, C.K. (2011), "Effects of multiple ground layers on thermal response test analysis and ground-source heat pump simulation", Appl. Energy, 88(12), 4405-4410. https://doi.org/10.1016/j.apenergy.2011.05.023
  17. Morgensen, P. (1983), "Fluid to duct wall heat transfer in duct system storages", Proceedings of the International Conference on Subsurface Heat Storage in Theory and Practice, Swedish Council for Building Research, June.
  18. Pahud, D., Fromentin, A. and Hadorn, J.C. (1996), The Duct Ground Heat Storage Model (DST) for TRNSYS used for the Simulation of Heat Exchanger Piles, user manual, (December 1996 version), Internal report, Laboratory of energy systems (LASEN), Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland.
  19. Park, H., Park. H., Lee, S.R. and Go, G.H. (2012), "Estimation of thermal conductivity of weathered granite soils", J. Korean Soc. Civil Eng., 32(2C), 69-77. [In Korean]
  20. Park, H., Lee, S.R., Yoon, S. and Choi, J.C. (2013), "Evaluation of thermal response and performance of PHC energy pile: Field experiments and numerical simulation", Appl. Energy, 103, 12-24. https://doi.org/10.1016/j.apenergy.2012.10.012
  21. Park, S., Lee, S.R., Park, H., Yoon, S. and Chung J. (2013), "Characteristics of an analytical solution for a spiral coil type ground heat exchanger", Comput. Geotechniques, 49, 18.24. https://doi.org/10.1016/j.compgeo.2012.11.006
  22. Remund, C.P. (1999), "Borehole thermal resistance: Laboratory and field studies", ASHARE Transaction, 105, 439-45.
  23. Rohsenhow, W.M., Hartnet, J.P. and Ganic, E.N. (1985), Handbook of Heat Transfer Fundamentals, New York: McGraw-Hill.
  24. Roth, P., Georgiev, A., Busso, A. and Barraza, E. (2004), "First in situ determination of ground and borehole thermal properties in Latin America", Renew. Energy, 29(12), 1947-1963. https://doi.org/10.1016/j.renene.2004.02.014
  25. Shonder, J.A. and Beck, J.V. (1999), "Field test of a new method for determining soil formation thermal conductivity and borehole resistance", ASHARE Transaction, 106(Part 1), 843-850.
  26. Yoon, S., Jianfeng, X. and Lee, S.R. (2012), "Development of ground thermal conductivity model of multi-layered soils", Proceeding of ANZ Conference on Geomechanics, Melbourne, Australia, July.
  27. Yoon, S., Lee, S.R., Oh, G.D. and Lee, D.S. (2011), "Integrity of optical fiber sensor for measurement of ground thermal conductivity", Proceedings of the 6th International Workshop on ANCRiSST, Dalian, China.
  28. Young, Y.R. (2001), "Development, verification, and design analysis of the borehole fluid thermal mass model for approximating short term borehole thermal response", Master's Thesis, Oklahoma state University, USA.

피인용 문헌

  1. Analysis of Construction Cost and Influence Factors on Horizontal Ground Heat Exchangers vol.10, pp.3, 2014, https://doi.org/10.7849/ksnre.2014.10.3.006
  2. Laboratory investigations and numerical analysis of thermal performance of the single U-tube VBHE in multiple-layer substrates vol.13, pp.1, 2018, https://doi.org/10.1299/jtst.2018jtst0003
  3. Life cycle cost analysis and smart operation mode of ground source heat pump system vol.16, pp.4, 2015, https://doi.org/10.12989/sss.2015.16.4.743
  4. Thermal performance evaluation of stainless steel pipe as a ground heat exchanger vol.2, pp.42, 2016, https://doi.org/10.3208/jgssp.ATC6-01
  5. An improved analytical model for vertical borehole ground heat exchanger with multiple-layer substrates and groundwater flow vol.202, 2017, https://doi.org/10.1016/j.apenergy.2017.05.152
  6. A novel hybrid design algorithm for spiral coil energy piles that considers groundwater advection vol.78, 2015, https://doi.org/10.1016/j.applthermaleng.2014.12.060
  7. Evaluation of Heat Exchange Rate in Horizontal Slinky and Coil Type Ground Heat Exchangers Considering Pitch Interval vol.30, pp.7, 2014, https://doi.org/10.7843/kgs.2014.30.7.55
  8. Evaluation of the thermal efficiency and a cost analysis of different types of ground heat exchangers in energy piles vol.105, 2015, https://doi.org/10.1016/j.enconman.2015.08.002
  9. Evaluation of thermal efficiency in different types of horizontal ground heat exchangers vol.105, 2015, https://doi.org/10.1016/j.enbuild.2015.07.054
  10. Evaluation of Thermal Response Test of Energy Pile vol.30, pp.4, 2014, https://doi.org/10.7843/kgs.2014.30.4.93
  11. An experimental and numerical approach to derive ground thermal conductivity in spiral coil type ground heat exchanger vol.88, pp.3, 2015, https://doi.org/10.1016/j.joei.2014.10.002
  12. Proposed OHTC Formula for Subsea Pipelines Considering Thermal Conductivities of Multi-Layered Soils vol.32, pp.2, 2018, https://doi.org/10.26748/KSOE.2018.4.32.2.084
  13. 수평 직선형 지중 열교환기 설계 방안 제안 vol.12, pp.4, 2014, https://doi.org/10.17664/ksgee.2016.12.4.001
  14. Group Pile Effect on Temperature Distributions inside Energy Storage Pile Foundations vol.10, pp.18, 2014, https://doi.org/10.3390/app10186597