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Heating performance characteristics of the ground source heat pump system with energy-piles and energy-slabs

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  • Moon, Chung-Eun
  • Choi, Jong Min

Abstract

Energy foundations and other thermo-active ground structure, energy wells, energy slabs, and pavement heating and cooling represent an innovative technology that contributes to environmental protection and provides substantial long-term cost savings and minimized maintenance. This paper focuses on earth-contact concrete elements that are already required for structural reasons, but which simultaneously work as heat exchangers. Pipes, energy-piles and energy-slabs filled with a heat carrier fluid are installed under conventional structural elements, forming the primary circuit of a geothermal energy system. The ground source heat pump system with energy-pile and energy-slab presented high heating performance due to the stability of entering water temperature from the ground loop heat exchanger. The minimum COPs of the heat pump unit for the energy-pile and energy-slab system were 4.2 and 4.5, respectively. These results are higher than the minimum COP certification standard of 3.45 for a closed ground loop heat pump unit.

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  • Moon, Chung-Eun & Choi, Jong Min, 2015. "Heating performance characteristics of the ground source heat pump system with energy-piles and energy-slabs," Energy, Elsevier, vol. 81(C), pages 27-32.
    • Handle: RePEc:eee:energy:v:81:y:2015:i:c:p:27-32
    DOI: 10.1016/j.energy.2014.10.063
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    References listed on IDEAS

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    5. Park, Sangwoo & Lee, Seokjae & Sung, Chihun & Choi, Hangseok, 2021. "Applicability evaluation of cast-in-place energy piles based on two-year heating and cooling operation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    6. Zhao, Qiang & Chen, Baoming & Tian, Maocheng & Liu, Fang, 2018. "Investigation on the thermal behavior of energy piles and borehole heat exchangers: A case study," Energy, Elsevier, vol. 162(C), pages 787-797.
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    8. Seokjae Lee & Sangwoo Park & Taek Hee Han & Jongmuk Won & Hangseok Choi, 2023. "Applicability Evaluation of Energy Slabs Installed in an Underground Parking Lot," Sustainability, MDPI, vol. 15(4), pages 1-15, February.
    9. Wu, Wei & Ran, Siyuan & Shi, Wenxing & Wang, Baolong & Li, Xianting, 2016. "NH3-H2O water source absorption heat pump (WSAHP) for low temperature heating: Experimental investigation on the off-design performance," Energy, Elsevier, vol. 115(P1), pages 697-710.
    10. Jaemin Kim & Yujin Nam, 2020. "Development of the Performance Prediction Equation for a Modular Ground Heat Exchanger," Energies, MDPI, vol. 13(22), pages 1-13, November.
    11. Kayaci, Nurullah, 2020. "Energy and exergy analysis and thermo-economic optimization of the ground source heat pump integrated with radiant wall panel and fan-coil unit with floor heating or radiator," Renewable Energy, Elsevier, vol. 160(C), pages 333-349.
    12. Ma, Qijie & Fan, Jianhua & Liu, Hantao, 2023. "Energy pile-based ground source heat pump system with seasonal solar energy storage," Renewable Energy, Elsevier, vol. 206(C), pages 1132-1146.
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