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Analysis on Thermal Performance of Ground Heat Exchanger According to Design Type Based on Thermal Response Test

Author

Listed:
  • Sang Mu Bae

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 46241, Korea)

  • Yujin Nam

    (Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 46241, Korea)

  • Jong Min Choi

    (Department of Mechanical Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-Gu, Daejeon 34158, Korea)

  • Kwang Ho Lee

    (Department of Architectural Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-Gu, Daejeon 34158, Korea)

  • Jae Sang Choi

    (Kajin Engineering Company Limited, 184 Gasan digital 2-ro, Geumcheon-gu, Seoul 08501, Korea)

Abstract

A ground source heat pump (GSHP) system has higher performance than air source heat pump system due to the use of more efficient ground heat source. However, the GSHP system performance depends on ground thermal properties and groundwater conditions. There are many studies on the improvement of GSHP system by developing ground heat exchanger (GHX) and heat exchange method. Several studies have suggested methods to improve heat exchange rate for the development of GHX. However, few real-scale experimental studies have quantitatively analyzed their performance using the same ground conditions. Therefore, the objective of this study was to evaluate the thermal performance of various pipe types of GHX by the thermal response test (TRT) under the same field and test conditions. Four kinds of GHX (HDPE type, HDPE-nano type, spiral fin type, and coaxial type) were constructed in the same site. Inlet and outlet temperatures of GHXs and effective thermal conductivity were measured through the TRT. In addition, the borehole thermal resistance was calculated to comparatively analyze the correlation of the heat exchange performance with each GHX. Result of the TRT revealed that averages effective thermal conductivities of HDPE type, HDPE-nano, spiral fin type, and coaxial type GHX were 2.25 W/m·K, 2.34 W/m·K, 2.55 W/m·K, and 2.16 W/m·K, respectively. In the result, it was found that the average borehole thermal resistance can be an important factor in TRT, but the effect of increased thermal conductivity of pipe material itself was not significant.

Suggested Citation

  • Sang Mu Bae & Yujin Nam & Jong Min Choi & Kwang Ho Lee & Jae Sang Choi, 2019. "Analysis on Thermal Performance of Ground Heat Exchanger According to Design Type Based on Thermal Response Test," Energies, MDPI, vol. 12(4), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:4:p:651-:d:206801
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    References listed on IDEAS

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    Cited by:

    1. Oliver Suft & David Bertermann, 2022. "One-Year Monitoring of a Ground Heat Exchanger Using the In Situ Thermal Response Test: An Experimental Approach on Climatic Effects," Energies, MDPI, vol. 15(24), pages 1-15, December.
    2. Pavel Neuberger & Radomír Adamovský, 2019. "Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps," Energies, MDPI, vol. 12(10), pages 1-14, May.
    3. Paul Christodoulides & Ana Vieira & Stanislav Lenart & João Maranha & Gregor Vidmar & Rumen Popov & Aleksandar Georgiev & Lazaros Aresti & Georgios Florides, 2020. "Reviewing the Modeling Aspects and Practices of Shallow Geothermal Energy Systems," Energies, MDPI, vol. 13(16), pages 1-45, August.
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    5. Joanna Piotrowska-Woroniak, 2021. "Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)," Energies, MDPI, vol. 14(16), pages 1-32, August.
    6. Luka Boban & Dino Miše & Stjepan Herceg & Vladimir Soldo, 2021. "Application and Design Aspects of Ground Heat Exchangers," Energies, MDPI, vol. 14(8), pages 1-31, April.
    7. Tomislav Kurevija & Adib Kalantar & Marija Macenić & Josipa Hranić, 2019. "Investigation of Steady-State Heat Extraction Rates for Different Borehole Heat Exchanger Configurations from the Aspect of Implementation of New TurboCollector™ Pipe System Design," Energies, MDPI, vol. 12(8), pages 1-17, April.
    8. Hyeongjin Moon & Jae-Young Jeon & Yujin Nam, 2020. "Development of Optimal Design Method for Ground-Source Heat-Pump System Using Particle Swarm Optimization," Energies, MDPI, vol. 13(18), pages 1-17, September.
    9. Joanna Piotrowska-Woroniak, 2021. "Determination of the Selected Wells Operational Power with Borehole Heat Exchangers Operating in Real Conditions, Based on Experimental Tests," Energies, MDPI, vol. 14(9), pages 1-21, April.
    10. Adel Eswiasi & Phalguni Mukhopadhyaya, 2021. "Performance of Conventional and Innovative Single U-Tube Pipe Configuration in Vertical Ground Heat Exchanger (VGHE)," Sustainability, MDPI, vol. 13(11), pages 1-15, June.
    11. Abdelazim Abbas Ahmed & Mohsen Assadi & Adib Kalantar & Tomasz Sliwa & Aneta Sapińska-Śliwa, 2022. "A Critical Review on the Use of Shallow Geothermal Energy Systems for Heating and Cooling Purposes," Energies, MDPI, vol. 15(12), pages 1-22, June.
    12. Tomasz Sliwa & Kinga Jarosz & Marc A. Rosen & Anna Sojczyńska & Aneta Sapińska-Śliwa & Andrzej Gonet & Karolina Fąfera & Tomasz Kowalski & Martyna Ciepielowska, 2020. "Influence of Rotation Speed and Air Pressure on the Down the Hole Drilling Velocity for Borehole Heat Exchanger Installation," Energies, MDPI, vol. 13(11), pages 1-18, May.
    13. Hongkyo Kim & Yujin Nam & Sangmu Bae & Jae Sang Choi & Sang Bum Kim, 2020. "A Study on the Effect of Performance Factor on GSHP System through Real-Scale Experiments in Korea," Energies, MDPI, vol. 13(3), pages 1-18, January.

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