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Performance and Feasibility Study of a Standing Column Well (SCW) System Using a Deep Geothermal Well

Author

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  • Jeong-Heum Cho

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 609-735, Korea)

  • Yujin Nam

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 609-735, Korea)

  • Hyoung-Chan Kim

    (Division of Geologic Environment, Korea Institute of Geoscience and Mineral Resources, 124, Gahang-no, Yuseong-gu, Daejeon 305-350, Korea)

Abstract

Deep geothermal heat pump systems have considerable energy saving potential for heating and cooling systems that use stable ground temperature and groundwater as their heat sources. However, deep geothermal systems have several limitations for real applications such as a very high installation cost and a lack of recognition as heating and cooling systems. In this study, we performed a feasibility assessment of a Standing Column Well (SCW) system using a deep geothermal well, based on a real-scale experiment in Korea. The results showed that the temperature of the heat source increased up to 42.04 °C in the borehole after the heating experiment, which is about 30 °C higher than that of normal shallow geothermal wells. Furthermore, the coefficient of performance (COP) of the heat pump during 3 months of operation was 5.8, but the system COP was only 3.6 due to the relatively high electric consumption of the pump. Moreover, the payback period of the system using a deep well for controlled horticulture in a glass greenhouse was calculated as 6 years compared with using a diesel boiler system.

Suggested Citation

  • Jeong-Heum Cho & Yujin Nam & Hyoung-Chan Kim, 2016. "Performance and Feasibility Study of a Standing Column Well (SCW) System Using a Deep Geothermal Well," Energies, MDPI, vol. 9(2), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:2:p:108-:d:63925
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    References listed on IDEAS

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    1. Park, Byeong-Hak & Bae, Gwang-Ok & Lee, Kang-Kun, 2015. "Importance of thermal dispersivity in designing groundwater heat pump (GWHP) system: Field and numerical study," Renewable Energy, Elsevier, vol. 83(C), pages 270-279.
    2. Nam, Yujin & Chae, Ho-Byung, 2014. "Numerical simulation for the optimum design of ground source heat pump system using building foundation as horizontal heat exchanger," Energy, Elsevier, vol. 73(C), pages 933-942.
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    Cited by:

    1. Carlos Lorente Rubio & Jorge Luis García-Alcaraz & Juan Carlos Sáenz-Diez Muro & Eduardo Martínez-Cámara & Agostino Bruzzone & Julio Blanco-Fernández, 2022. "Environmental Impact Comparison of Geothermal Alternatives for Conventional Boiler Replacement," Energies, MDPI, vol. 15(21), pages 1-15, November.
    2. Lee, Da Young & Seo, Byeong Mo & Hong, Sung Hyup & Choi, Jong Min & Lee, Kwang Ho, 2019. "Part load ratio characteristics and energy saving performance of standing column well geothermal heat pump system assisted with storage tank in an apartment," Energy, Elsevier, vol. 174(C), pages 1060-1078.
    3. Tsagarakis, Konstantinos P., 2020. "Shallow geothermal energy under the microscope: Social, economic, and institutional aspects," Renewable Energy, Elsevier, vol. 147(P2), pages 2801-2808.

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