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Investigation of the influence of groundwater seepage on the heat transfer characteristics of a ground source heat pump system with a 9-well group

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  • Building Systems and Components
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Abstract

The U-type ground heat exchanger is a significant component of the ground source heat pump (GSHP) system, transferring heat from the soil for the air conditioning requirements. Heat accumulation becomes a common problem for the practical application of such systems in southern China. Moreover, the buried pipes containing heat exchangers are constructed in a group form, making the heat accumulation situation more severe and complex. A 3-dimensional simulation model of a 9-well buried pipe group was established and validated by a thermal response test conducted in Nanjing, China. On the basis of this model, the influence of underground seepage water temperature and flow rate on thermal distribution was investigated. Subsequently, the heat transfer capacity of single-well depth in a heat exchanger under varying conditions was calculated. It is concluded that a serious heat accumulation occurs without groundwater seepage. With seepage flow, the heat accumulation can be dissipated. Lower seepage temperature has a modestly beneficial effect on the heat dissipation. The heat accumulation can be better dissipated and the heat transfer capacity per well depth can be improved with greater seepage flow rate.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51806096) and Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 18KJB560007).

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Authors and Affiliations

  1. College of Urban Construction, Nanjing Tech University, No. 200 North Zhongshan Road, Nanjing, 210009, China

    Yu Wang, Zhicheng Liu, Xiaolei Yuan, Xiaofeng Niu & Jinxiang Liu

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  1. Yu Wang
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  2. Zhicheng Liu
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  3. Xiaolei Yuan
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  4. Xiaofeng Niu
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  5. Jinxiang Liu
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Correspondence to Yu Wang.

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Wang, Y., Liu, Z., Yuan, X. et al. Investigation of the influence of groundwater seepage on the heat transfer characteristics of a ground source heat pump system with a 9-well group. Build. Simul. 12, 857–868 (2019). https://doi.org/10.1007/s12273-019-0526-4

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  • DOI: https://doi.org/10.1007/s12273-019-0526-4

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