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Importance of thermal dispersivity in designing groundwater heat pump (GWHP) system: Field and numerical study

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  • Park, Byeong-Hak
  • Bae, Gwang-Ok
  • Lee, Kang-Kun

Abstract

Through field and numerical studies, this paper describes the importance of thermal dispersivity in designing groundwater heat pump (GWHP) systems. A push–pull test using heat as a tracer was performed to estimate the thermal dispersivity of the aquifer of this study at the Han River Environment Research Center in Korea. Measured data during the test were compared to the results of three-dimensional (3-D) groundwater flow and heat transport simulations. From the best fit between the measured data and the simulated results, thermal dispersivity was estimated to be 0.4 m. To evaluate the effects of the thermal properties on subsurface heat transport associated with GWHP systems, sensitivity analysis was also performed. The analysis confirmed that, despite small changes based on the estimated values, thermal dispersivity of the aquifer had a great influence on the subsurface temperature distribution as well as the extent of the thermal plume. Because groundwater pumping and injection can cause flow velocity around wells to be faster than natural groundwater velocity, thermal dispersion in this elevated velocity condition will have a considerable impact on the heat transport process with operation of the GWHP system.

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  • 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.
    • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:270-279
    DOI: 10.1016/j.renene.2015.04.036
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    References listed on IDEAS

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    1. Lee, Jin-Yong, 2009. "Current status of ground source heat pumps in Korea," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1560-1568, August.
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    2. Taha Sezer & Abubakar Kawuwa Sani & Rao Martand Singh & Liang Cui, 2023. "Laboratory Investigation of Impact of Injection–Abstraction Rate and Groundwater Flow Velocity on Groundwater Heat Pump Performance," Energies, MDPI, vol. 16(19), pages 1-19, October.
    3. Longcang Shu & Rui Xiao & Zhonghui Wen & Yuezan Tao & Peigui Liu, 2017. "Impact of Boundary Conditions on a Groundwater Heat Pump System Design in a Shallow and Thin Aquifer near the River," Sustainability, MDPI, vol. 9(5), pages 1-18, May.
    4. Blázquez, Cristina Sáez & Verda, Vittorio & Nieto, Ignacio Martín & Martín, Arturo Farfán & González-Aguilera, Diego, 2020. "Analysis and optimization of the design parameters of a district groundwater heat pump system in Turin, Italy," Renewable Energy, Elsevier, vol. 149(C), pages 374-383.
    5. 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.
    6. Simona Adrinek & Mitja Janža & Mihael Brenčič, 2023. "Impact of Open-Loop Systems on Groundwater Temperature in NE Slovenia," Sustainability, MDPI, vol. 15(18), pages 1-24, September.
    7. Jeon, Jun-Seo & Lee, Seung-Rae & Kim, Woo-Jin, 2016. "Applicability of thermal response tests in designing standing column well system: A numerical study," Energy, Elsevier, vol. 109(C), pages 679-693.
    8. Jinsang Kim & Yujin Nam, 2015. "A Numerical Study on System Performance of Groundwater Heat Pumps," Energies, MDPI, vol. 9(1), pages 1-14, December.
    9. Bruno Piga & Alessandro Casasso & Francesca Pace & Alberto Godio & Rajandrea Sethi, 2017. "Thermal Impact Assessment of Groundwater Heat Pumps (GWHPs): Rigorous vs. Simplified Models," Energies, MDPI, vol. 10(9), pages 1-19, September.
    10. Taha Sezer & Abubakar Kawuwa Sani & Rao Martand Singh & Liang Cui, 2023. "Numerical Investigation and Optimization of a District-Scale Groundwater Heat Pump System," Energies, MDPI, vol. 16(20), pages 1-25, October.

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