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Ground thermal conductivity for (ground source heat pumps) GSHPs in Korea

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  • Shim, B.O.
  • Park, C.-H.

Abstract

The aim of this study is to evaluate the characteristic thermal properties of 208 (thermal response test) TRT data sets collected in Korea. In the evaluation, the line-source model is used in conjunction with the step-wise evaluation to validate the applicability of the model. The applicability of the step-wise evaluation is classified focusing on the convergence criterion of ground thermal conductivities. The ground thermal conductivities were evaluated in the range of 1.73 and 8.56 W/m·K with the mean of 2.55 W/m·K. The corresponding borehole thermal resistances were also obtained in the range between 0.06 and 0.20 m·K/W with the mean 0.13 m·K/W. In order to investigate the availability of the thermal conductivity of the test sites from the geothermal database in Korea, the ground thermal conductivity obtained by TRTs was compared with the mean bedrock thermal conductivity. Comparison of the four major bedrocks in the test sites indicated that the mean differences are 0.34, 0.53, 0.22 and 1.39 W/m·K at the bedrocks of the granite, geneiss, tuff and sandstone areas, respectively.

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  • Shim, B.O. & Park, C.-H., 2013. "Ground thermal conductivity for (ground source heat pumps) GSHPs in Korea," Energy, Elsevier, vol. 56(C), pages 167-174.
    • Handle: RePEc:eee:energy:v:56:y:2013:i:c:p:167-174
    DOI: 10.1016/j.energy.2013.04.059
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    2. Spitler, Jeffrey D. & Gehlin, Signhild E.A., 2015. "Thermal response testing for ground source heat pump systems—An historical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 1125-1137.
    3. Norma Patricia López-Acosta & Alan Igor Zaragoza-Cardiel & David Francisco Barba-Galdámez, 2021. "Determination of Thermal Conductivity Properties of Coastal Soils for GSHPs and Energy Geostructure Applications in Mexico," Energies, MDPI, vol. 14(17), pages 1-14, September.
    4. 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.
    5. Soldo, Vladimir & Boban, Luka & Borović, Staša, 2016. "Vertical distribution of shallow ground thermal properties in different geological settings in Croatia," Renewable Energy, Elsevier, vol. 99(C), pages 1202-1212.
    6. Li, Chao & Guan, Yanling & Wang, Xing & Li, Gaopeng & Zhou, Cong & Xun, Yingjiu, 2018. "Experimental and numerical studies on heat transfer characteristics of vertical deep-buried U-bend pipe to supply heat in buildings with geothermal energy," Energy, Elsevier, vol. 142(C), pages 689-701.
    7. Zhou, Jinzhi & Zhu, Zishang & Zhao, Xudong & Yuan, Yanping & Fan, Yi & Myers, Steve, 2020. "Theoretical and experimental study of a novel solar indirect-expansion heat pump system employing mini channel PV/T and thermal panels," Renewable Energy, Elsevier, vol. 151(C), pages 674-686.
    8. 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.
    9. Zhang, Changxing & Song, Wei & Sun, Shicai & Peng, Donggen, 2015. "Parameter estimation of in-situ thermal response test with unstable heat rate," Energy, Elsevier, vol. 88(C), pages 497-505.
    10. Yongjie Ma & Yanjun Zhang & Yuxiang Cheng & Yu Zhang & Xuefeng Gao & Kun Shan, 2022. "A Case Study of Field Thermal Response Test and Laboratory Test Based on Distributed Optical Fiber Temperature Sensor," Energies, MDPI, vol. 15(21), pages 1-20, October.

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