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http://dx.doi.org/10.12652/Ksce.2015.35.2.0361

Evaluation of Heat Exchange Efficiency and Applicability for Parallel U-type Cast-in-place Energy Pile  

Park, Sangwoo (Korea University)
Kim, Byeongyeon (Korea University)
Sung, Chihun (Korea University)
Choi, Hangseok (Korea University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.35, no.2, 2015 , pp. 361-375 More about this Journal
Abstract
An energy pile is one of the novel ground heat exchangers (GHEX's) that is a economical alternative to the conventional closed-loop vertical GHEX. The combined system of both a structural foundation and a GHEX contains a heat exchange pipe inside the pile foundation and allows a working fluid circulating through the pipe, inducing heat exchange with the ground formation. In this paper, a group of energy piles equipped with parallel U-type (5, 8 and 10 pairs) heat exchange pipes was constructed in a test-bed by fabricating in large-diameter cast-in-place concrete piles. In addition, a closed-loop vertical GHEX with 30m depth was constructed nearby to conduct in-situ thermal response tests (TRTs) and to compare with the thermal performance of the cast-in-place energy piles. A series of thermal performance tests was carried out with application of an artificial cooling and heating load to evaluate the heat exchange rate of energy piles. The applicability of cast-in-place energy piles was evaluated by comparing the relative heat exchange efficiency and heat exchange rate with preceding studies. Finally, it is concluded that the cast-in-place energy piles constructed in the test-bed demonstrate effective and stable thermal performance compared with the other types of GHEX.
Keywords
Energy pile; Closed-loop vertical ground heat exchanger; In-situ thermal response test; Thermal performance test; Applicability of energy pile;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Wood, C. J., Liu, H. and Riffat, S. B. (2009). "Use of energy piles in a residential building, and effects on ground temperature and heat pump efficiency." Geotechniques, Vol. 59, No. 3, pp. 287-290.   DOI
2 Yu, H. K. (2008). "Development and performance evaluation of ground heat exchanger utilizing PHC pile foundation of building." Journal of the Korean Solar Energy Society, Vol. 28, No. 5, pp. 56-64.
3 Bourne-Webb, P. J., Amatya, B., Soga, K., Amis, T., Davidson, C. and Payne, P. (2009). "Energy pile test at Lambeth College, London: Geotechnical and Thermodynamic Aspects of Pile Response to Heat Cycles." Geotechniques, Vol. 59, No. 3, pp. 237-248.   DOI
4 Brandl, H. (2006). "Energy foundation and other thermo-active ground structures." Geotechniques, Vol. 56, No. 2, pp. 81-122.   DOI
5 Carslaw, S. H. and Jaeger, J. C. (1959). Conduction of Heat in Solids, Second Ed., Claremore Press, Oxford.
6 Cui, P., Li, X., Man, Y. and Fang, Z. (2011). "Heat transfer analysis of pile geothermal heat exchangers with spiral coils." Applied Energy, Vol. 88, No. 11, pp. 4113-4119.   DOI   ScienceOn
7 Gao, J., Zhang, X., Liu, J., Li, K. and Yang, J. (2008). "Numerical and experimental assessment of thermal performance of vertical energy piles." Applied Energy, Vol. 85, pp. 901-910.   DOI
8 Hamada, Y., Saitoh, H., Nakamura, M., Kubota, H. and Ochifuji, K. (2007). "Field performance of an energy pile system for space heating." Energy and Building, Vol. 39, pp. 517-524.   DOI
9 Ingersoll, L. R., Zobel, O. J. and Ingersoll, A. C. (1954). Heat conduction with engineering, geological and other application, McGraw-Hill, New York.
10 Jalaluddin, Akio Miyara, Koutaro Tsubaki, Shuntaro Inoue and Kentaro Yoshida (2011). "Experimental study of several types of ground heat exchanger using a steel pile foundation." Renewable Energy, Vol. 36, No. 2, pp. 764-771.   DOI   ScienceOn
11 Laloui, L., Nuth M. and Vulliet, L. (2006). "Experimental and numerical investigations of the behavior of a heat exchanger pile." International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 30, pp. 763-781.   DOI
12 Johnston, I. W., Narsillio, G. A. and Colls, S. (2011). "Emerging geothermal energy technologies." KSCE Journal of Civil Engineering, Vol. 15, No. 4, pp. 643-653.   DOI
13 Jun, L., Zhang, X., Gao, J. and Yang, J. (2009). "Evaluation of heat exchange rate of GHW in geothermal heat pump system." Renewable Energy, Vol. 34, pp. 2898-2904.   DOI
14 Laloui, L., Moreni, M. and Vulliet, L. (2003). "Behavior of a dualpurpose pile as foundation and heat exchanger." Canadian Geotechnical Journal, Vol. 40, No. 2, pp. 388-402.   DOI   ScienceOn
15 Lee, C., Park, M., Park, S., Won, J. and Choi, H. (2013). "Backanalyses of in-situ thermal response test (TRT) for evaluating ground thermal conductivity." International Journal of Energy Research, Vol. 37, No. 11, pp. 1397-1404.   DOI
16 Lee, C., Park, S., Won, J., Jeoung, J., Sohn, B. and Choi, H. (2012). "Evaluation of thermal performance of energy textile installed in tunnel." Renewable Energy, Vol. 42, pp. 11-22.   DOI   ScienceOn
17 Lee, S. J., Min, H. S., Song, J. Y. and Jeong, S. S. (2010). "Thermal influential factors of energy pile." Journal of Korean Society of Civil Engineering, Vol. 30, No. 6C, pp. 231-239.
18 Li, X., Chen, Y., Chen, Z. and Zhao, J. (2006). "Thermal performances of different types of underground heat exchangers." Energy and Building, Vol. 38, pp. 543-547.   DOI   ScienceOn
19 Markiewicz, R. (2004). Umerische und experimentelle Untersuchungen zur Nutzung von geothermischer Energie mittels erdberührter Bauteile und Neuentwicklungen für den Tunnelbau, Ph.D. Thesis, Technical Univ. of Vienna (in Austrian).
20 Man, L., Yang, H., Diao, N., Liu, J. and Fang, J. (2010). "A new model and analytical solutions for borehole and pile ground heat exchangers." International Journal of Heat and Mass Transfer, Vol. 53, pp. 2593-2061.   DOI
21 Mogensen, P. (1983). "Fluid to duct wall heat transfer in duct system storages." Proceedings of the International Conference on Suvsurface Heat Storage in Theory and Practice, Swedish Council for Building Research, June 6-8.
22 Monique de Moel, P. M., Bach, A. B., Rao, M. S., JingLiang, O. S. (2010). "Technological advances and applications of geothermal energy pile foundations and their feasibility in Australia." Renewable and Sustainable Energy Reviews, Vol. 14, No. 9, pp. 2683-2696.   DOI
23 Morino, K. and Oka, T. (1994). "Study on heat exchanged in soil by circulating water in a steel pile." Energy and Buildings, Vol. 21, No. 1, pp. 65-78.   DOI   ScienceOn
24 Nagano, K. (2007). "Energy pile system in new building of sapporo city university." Thermal Energy Storage for Sustainable Energy Consumption, Vol. 234, pp. 245-253   DOI
25 Nam, Y., Hwang, S. and Ooka, R. (2007). "Geothermal heat pump system using foundation pile structures." Journal of Korea Society of Geothermal Energy Engineers, Vol. 3, No. 1, pp. 51-60.
26 Pahud, D. and Hubbuck, M. (2007). "Measured thermal performances of the energy pile system of the duck midfield as Zurick airport." Proceedings European Geothermal Congress 2007; Unterhaching, Germany, 30 May-1 June.
27 Salomone, L. A. and Marlowe, J. I. (1989). Soil and rock classification according to thermal conductivity : Design of Ground-coupled Heat Pump Systems : Final Report, Electric Power Research Inst. (EPRI), EPRI-CU-6482.
28 Park, M., Lee, C., Park, S., Sohn, B. and Choi, H. (2012). "Evaluation of ground thermal conductivity by performing in-situ thermal response test (TRT) and CFD back-analysis." Journal of Korean Geotechnical Society, Vol. 28, No. 12, pp. 5-15.   DOI
29 Park, S., Sohn, J. R., Park, Y. B., Ryu, H. K. and Choi, H. (2013). "Study on thermal behavior and design method for coil-type PHC energy pile." Journal of Korean Geotechnical Society, Vol. 29, No. 8, pp. 37-51.   DOI
30 Park, Y. B., Park, J. B. and Lim, H. S. (2007). "Construction method of ground heat exchanger using energy pile in ground source heat system." Journal of Korean Society of Civil Engineering, Vol. 55, No. 7, pp. 41-46.
31 Sekine, K., Shiba, Y., Ooka, R., Hwang, S. H. and Yokoi, M. (2007). "Development of a ground-source heat pump system with ground heat exchanger utilizing the cast-in-place concrete pile foundations of buildings." ASHRAE Transactions, pp. 558-566.
32 Sharqawy, M. H., Mokheimer, E. M., Habib, M. A., Badr, H. M., Said, N. A. and Al-Shayea, S. A. (2009). "Energy, energy and uncertainty analyses of the thermal response test for a ground heat exchanger." International Journal of Energy Research, Vol. 33, pp. 582-592.   DOI   ScienceOn
33 Wagner, R. and Clauser, C. (2005). "Evaluating thermal response tests using parameter estimation for thermal conductivity and thermal capacity." Journal of Geophysics and Engineering, Vol. 2, pp. 349-356.   DOI   ScienceOn