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A new approach to modelling of a horizontal geo-heat exchanger with an internal source term

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  • Sofyan, Sarwo Edhy
  • Hu, Eric
  • Kotousov, Andrei

Abstract

This paper presents a new approach to considering the effect of seasonal changes in soil temperature on the performance of a horizontal geo heat exchanger. It is different from extant models which consider the seasonal changes in soil temperature by applying a real energy balance on the ground surface. In the new model, the seasonal changes in soil temperature, which are affected by the thermal interaction between the ground and the atmosphere, are expressed as an internal source term. The value of the internal source term depends on the soil density, soil specific heat, soil temperature difference during summer and winter, and time period. The simulation results show that the new approach, which takes into account the effect of periodic soil temperature fluctuations on the performance of the horizontal geo heat exchanger, is valid. The validated model is then used to conduct a sensitivity analysis to investigate the effects of the pipe length, fluid flow rate, inlet fluid temperature, and burial depth on the thermal performance of the horizontal geo heat exchanger.

Suggested Citation

  • Sofyan, Sarwo Edhy & Hu, Eric & Kotousov, Andrei, 2016. "A new approach to modelling of a horizontal geo-heat exchanger with an internal source term," Applied Energy, Elsevier, vol. 164(C), pages 963-971.
    • Handle: RePEc:eee:appene:v:164:y:2016:i:c:p:963-971
    DOI: 10.1016/j.apenergy.2015.07.034
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    References listed on IDEAS

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    1. Florides, G. & Theofanous, E. & Iosif-Stylianou, I. & Tassou, S. & Christodoulides, P. & Zomeni, Z. & Tsiolakis, E. & Kalogirou, S. & Messaritis, V. & Pouloupatis, P. & Panayiotou, G., 2013. "Modeling and assessment of the efficiency of horizontal and vertical ground heat exchangers," Energy, Elsevier, vol. 58(C), pages 655-663.
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    6. Go, Gyu-Hyun & Lee, Seung-Rae & N.V., Nikhil & Yoon, Seok, 2015. "A new performance evaluation algorithm for horizontal GCHPs (ground coupled heat pump systems) that considers rainfall infiltration," Energy, Elsevier, vol. 83(C), pages 766-777.
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    Cited by:

    1. Gao, Wu & Masum, Shakil & Qadrdan, Meysam & Thomas, Hywel Rhys, 2022. "Estimation and prediction of shallow ground source heat resources subjected to complex soil and atmospheric boundary conditions," Renewable Energy, Elsevier, vol. 197(C), pages 978-994.
    2. 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.
    3. Chengbin Zhang & Weibo Yang & Jingjing Yang & Suchen Wu & Yongping Chen, 2017. "Experimental Investigations and Numerical Simulation of Thermal Performance of a Horizontal Slinky-Coil Ground Heat Exchanger," Sustainability, MDPI, vol. 9(8), pages 1-22, August.
    4. Sarwo Edhy Sofyan & Eric Hu & Andrei Kotousov & Teuku Meurah Indra Riayatsyah & Razali Thaib, 2020. "Mathematical Modelling and Operational Analysis of Combined Vertical–Horizontal Heat Exchanger for Shallow Geothermal Energy Application in Cooling Mode," Energies, MDPI, vol. 13(24), pages 1-20, December.
    5. Pandey, Navdeep & Murugesan, K. & Thomas, H.R., 2017. "Optimization of ground heat exchangers for space heating and cooling applications using Taguchi method and utility concept," Applied Energy, Elsevier, vol. 190(C), pages 421-438.

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