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Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump

Received: 13 September 2014     Accepted: 30 September 2014     Published: 10 October 2014
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Abstract

The present study aims to investigate the performance of multiple-tube ground heat exchangers (GHEs). The multiple-tube GHEs with a number of pipes installed inside the borehole were simulated. Thermal interferences between the pipes and performance of multiple-tube GHEs are discussed. Increasing the number of inlet tube in the borehole increases the contact surface area and then leads to increase of heat exchange with the ground. However, ineffective of heat exchange in the outlet tube caused by thermal interferences from the inlet tube reduces the heat exchange rate for the GHEs. The GHE performances increase of 9.1 % for three-tube, of 13.6 % for four-tube, and of 20.1 % for multi-tube compared with that of the U-tube. The four-tube and multi-tube GHEs which consist of four pipes as heat exchange pipes where the multi-tube GHE provides better performance than that of the four-tube GHE. This fact indicates that thermal interferences between the pipes affect the performance. Thermal interferences between the pipes should be considered.

Published in American Journal of Energy Engineering (Volume 2, Issue 5)
DOI 10.11648/j.ajee.20140205.11
Page(s) 103-107
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Heat Exchange Rate, Thermal Interferences, Multiple-Tube GHEs

References
[1] ASHRAE: 2011 ASHRAE Handbook: HVAC Applications, SI Edition, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle, N.E., Atlanta, GA 30329.
[2] C. Yavuzturk, J.D. Spitler, , S.J. Rees, “A Transient Two-dimensional Finite Volume Model for the Simulation of Vertical U-tube Ground Heat Exchangers,” ASHRAE Transactions, 1999, vol. 105(2), pp. 465-474.
[3] C. Yavuzturk, J.D. Spitler, “Field Validation of a Short Time-Step Model for Vertical Ground Loop Heat Exchangers,” ASHRAE Transactions, 2001, vol. 107(1), pp. 617-625.
[4] V. Partenay, P. Riederer, T. Salquea, E. Wurtz, “The influence of the borehole short-time response on ground source heat pump system efficiency,” Energy and Buildings, 2011, vol. 43, pp. 1280–1287.
[5] L. Lamarche, B. Beauchamp, “New solutions for the short-time analysis of geothermal vertical boreholes,” International Journal of Heat and Mass Transfer, 2007, vol. 50, pp. 1408–1419.
[6] G. Bandyopadhyay, W. Gosnold, M. Mann, “Analytical and semi-analytical solutions for short-time transient response of ground heat exchangers,” Energy and Buildings, 2008, vol. 40, pp. 1816–1824.
[7] E.J. Kim, J.J. Roux, G. Rusaouen, F. Kuznik, “Numerical modelling of geothermal vertical heat exchangers for the short time analysis using the state model size reduction technique,” Applied Thermal Engineering, 2010, vol. 30, pp. 706–714.
[8] A. Zarrella, M. Scarpa, M. De Carli, “Short time step analysis of vertical ground-coupled heat exchangers: The approach of CaRM,” Renewable Energy, 2011, vol. 36, pp. 2357-2367.
[9] E. Zanchini, S. Lazzari, A. Priarone, “Long-term performance of large borehole heat exchanger fields with unbalanced seasonal loads and groundwater flow,” Energy, 2012, vol. 38, pp. 66-77.
[10] P. Cui, H. Yang, Z. Fang, “Numerical analysis and experimental validation of heat transfer in ground heat exchangers in alternative operation modes,” Energy and Buildings, 2008, vol. 40, pp. 1060–1066.
[11] H. Esen, M. Inalli, M. Esen, “Numerical and experimental analysis of a horizontal ground-coupled heat pump system,” Building and Environment, 2007, vol. 42, pp. 1126–1134.
[12] H. Esen, M. Inalli, M. Esen, K. Pihtili, “Energy and exergy analysis of a ground-coupled heat pump system with two horizontal ground heat exchangers,” Building and Environment, 2007, vol. 42, pp. 3606–3615.
[13] H. Esen, M. Inalli, “Thermal response of ground for different depths on vertical ground source heat pump system in Elazig, Turkey,” Journal of the Energy Institute, 2009, vol. 82 (2), pp. 95-101.
[14] H. Esen, M. Inalli, Y. Esen, “Temperature distributions in boreholes of a vertical ground-coupled heat pump system,” Renewable Energy, 2009, vol. 34, pp. 2672-2679.
[15] X. Li, Y. Chen, Z. Chen, J. Zhao, “Thermal performances of different types of underground heat exchangers,” Energy and Buildings, vol. 38, pp. 543–547.
[16] Y. Hamada, H. Saitoh, M. Nakamura, H. Kubota, K. Ochifuji, “Field performance of an energy pile system for space heating,” Energy and Buildings, 2007, vol. 39, pp. 517–524.
[17] J. Gao, X. Zhang, J. Liu, K.S. Li, J. Yang, “Thermal performance and ground temperature of vertical pile-foundation heat exchangers: A case study,” Applied Thermal Engineering, 2008, vol. 28, pp. 2295–2304.
[18] C. Lee, M. Park, S. Min, S.H. Kang, B. Sohn, H. Choi, “Comparison of effective thermal conductivity in closed-loop vertical ground heat exchangers,” Applied Thermal Engineering, 2011, vol. 31, pp. 3669-3676.
[19] L. Jun, Z. Xu, G. Jun, Y. Jie, “Evaluation of heat exchange rate of GHE in geothermal heat pump systems,” Renewable Energy, 2009, vol. 34, pp. 2898–2904.
[20] Jalaluddin, A. Miyara, K. Tsubaki, S. Inoue, K. Yoshida, “Experimental study of several types of ground heat exchanger using a steel pile foundation,” Renewable Energy, 2011, vol. 36, pp. 764-771.
[21] Jalaluddin, A. Miyara, “Thermal performance investigation of several types of vertical ground heat exchangers with different operation mode,” Applied Thermal Engineering, 2012, vol. 33-34, pp. 167–174.
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  • APA Style

    Jalaluddin, Akio Miyara. (2014). Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump. American Journal of Energy Engineering, 2(5), 103-107. https://doi.org/10.11648/j.ajee.20140205.11

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    ACS Style

    Jalaluddin; Akio Miyara. Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump. Am. J. Energy Eng. 2014, 2(5), 103-107. doi: 10.11648/j.ajee.20140205.11

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    AMA Style

    Jalaluddin, Akio Miyara. Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump. Am J Energy Eng. 2014;2(5):103-107. doi: 10.11648/j.ajee.20140205.11

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  • @article{10.11648/j.ajee.20140205.11,
      author = {Jalaluddin and Akio Miyara},
      title = {Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump},
      journal = {American Journal of Energy Engineering},
      volume = {2},
      number = {5},
      pages = {103-107},
      doi = {10.11648/j.ajee.20140205.11},
      url = {https://doi.org/10.11648/j.ajee.20140205.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20140205.11},
      abstract = {The present study aims to investigate the performance of multiple-tube ground heat exchangers (GHEs). The multiple-tube GHEs with a number of pipes installed inside the borehole were simulated. Thermal interferences between the pipes and performance of multiple-tube GHEs are discussed. Increasing the number of inlet tube in the borehole increases the contact surface area and then leads to increase of heat exchange with the ground. However, ineffective of heat exchange in the outlet tube caused by thermal interferences from the inlet tube reduces the heat exchange rate for the GHEs. The GHE performances increase of 9.1 % for three-tube, of 13.6 % for four-tube, and of 20.1 % for multi-tube compared with that of the U-tube. The four-tube and multi-tube GHEs which consist of four pipes as heat exchange pipes where the multi-tube GHE provides better performance than that of the four-tube GHE. This fact indicates that thermal interferences between the pipes affect the performance. Thermal interferences between the pipes should be considered.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Performance Investigation of Multiple-Tube Ground Heat Exchangers for Ground-Source Heat Pump
    AU  - Jalaluddin
    AU  - Akio Miyara
    Y1  - 2014/10/10
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    N1  - https://doi.org/10.11648/j.ajee.20140205.11
    DO  - 10.11648/j.ajee.20140205.11
    T2  - American Journal of Energy Engineering
    JF  - American Journal of Energy Engineering
    JO  - American Journal of Energy Engineering
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    PB  - Science Publishing Group
    SN  - 2329-163X
    UR  - https://doi.org/10.11648/j.ajee.20140205.11
    AB  - The present study aims to investigate the performance of multiple-tube ground heat exchangers (GHEs). The multiple-tube GHEs with a number of pipes installed inside the borehole were simulated. Thermal interferences between the pipes and performance of multiple-tube GHEs are discussed. Increasing the number of inlet tube in the borehole increases the contact surface area and then leads to increase of heat exchange with the ground. However, ineffective of heat exchange in the outlet tube caused by thermal interferences from the inlet tube reduces the heat exchange rate for the GHEs. The GHE performances increase of 9.1 % for three-tube, of 13.6 % for four-tube, and of 20.1 % for multi-tube compared with that of the U-tube. The four-tube and multi-tube GHEs which consist of four pipes as heat exchange pipes where the multi-tube GHE provides better performance than that of the four-tube GHE. This fact indicates that thermal interferences between the pipes affect the performance. Thermal interferences between the pipes should be considered.
    VL  - 2
    IS  - 5
    ER  - 

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Author Information
  • Department of Mechanical Engineering, Hasanuddin University, Makassar, Indonesia

  • Department of Mechanical Engineering, Saga University, Saga-shi, Japan

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