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On the sizing of a novel Flat-Panel ground heat exchanger in coupling with a dual-source heat pump

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  • Bottarelli, M.
  • Bortoloni, M.
  • Su, Y.

Abstract

Ground-coupled and air-source heat pumps (GCHPs and ASHPs, respectively) are regarded as energy efficient systems for air conditioning. Their coupling in a dual air and ground source heat pump (DSHP) can offer a further performance improvement by reducing the drawbacks of each standalone technology. In the present study, a DSHP coupled with a Flat-Panel as a horizontal ground heat exchanger (HGHE) is numerically analysed in comparison with its counterparts GCHP and ASHP, by implementing COMSOL Multiphysics to simulate heat transfer in the ground operated by the Flat-Panel. The DSHP operativity is provided by a function set to control the switching between air and ground sources, according to their temperatures and trigger thresholds. A parametric analysis has been then carried out in order to propose a preliminary guideline to size the Flat-Panel for a balance between energy saving and installation cost. The DSHP shows a higher efficiency in comparison with either ASHP or GCHP due to the switching between two sources to more favourable working temperatures, and can offer a profitable hybrid solution providing protection against frosting and size reduction of the HGHE, therefore helping to promote the penetration of heat pumps in the residential market.

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  • Bottarelli, M. & Bortoloni, M. & Su, Y., 2019. "On the sizing of a novel Flat-Panel ground heat exchanger in coupling with a dual-source heat pump," Renewable Energy, Elsevier, vol. 142(C), pages 552-560.
    • Handle: RePEc:eee:renene:v:142:y:2019:i:c:p:552-560
    DOI: 10.1016/j.renene.2019.04.088
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    Cited by:

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    5. Michele Bottarelli & Francisco Javier González Gallero, 2020. "Energy Analysis of a Dual-Source Heat Pump Coupled with Phase Change Materials," Energies, MDPI, vol. 13(11), pages 1-17, June.
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    7. Emmi, Giuseppe & Bottarelli, Michele, 2023. "Enhancement of shallow ground heat exchanger with phase change material," Renewable Energy, Elsevier, vol. 206(C), pages 828-837.

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