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Modeling of solar-assisted ground-coupled heat pumps with or without batteries in remote high north communities

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  • Maranghi, Florian
  • Gosselin, Louis
  • Raymond, Jasmin
  • Bourbonnais, Martin

Abstract

Many subarctic communities rely entirely on fossil fuels for their energy needs. Solar-assisted ground-coupled heat pumps (SAGCHP) can be a solution to integrate renewable energy sources into their energy portfolios. However, it is currently unknown how such systems could operate in the context of the high North (cold ground, extreme mismatch between insolation and heating need, electricity from diesel). The objective of the paper is to develop a detailed model of a SAGCHP heating a house in Nunavik (Quebec, Canada) in order to gain a better understanding of its potential and limitations. The solar assistance is provided by PVs. Simulations with and without electric storage (batteries) were run. A complex tradeoff between four different modes of operation was obtained depending on the conditions of the system at each time step. For the test case, results show that the ground experiences a weak long-term thermal depletion partly compensated solar energy, but that a significant portion of the PV power production is preferably used by the compressor or stored in batteries rather than stored in the ground as heat. Over ten years, the SAGCHP system reduced fuel consumption respectively by 38.2% (without a battery) and 59.1% (with a battery).

Suggested Citation

  • Maranghi, Florian & Gosselin, Louis & Raymond, Jasmin & Bourbonnais, Martin, 2023. "Modeling of solar-assisted ground-coupled heat pumps with or without batteries in remote high north communities," Renewable Energy, Elsevier, vol. 207(C), pages 484-498.
    • Handle: RePEc:eee:renene:v:207:y:2023:i:c:p:484-498
    DOI: 10.1016/j.renene.2023.03.040
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    References listed on IDEAS

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    1. Gunawan, Evelyn & Giordano, Nicolò & Jensson, Páll & Newson, Juliet & Raymond, Jasmin, 2020. "Alternative heating systems for northern remote communities: Techno-economic analysis of ground-coupled heat pumps in Kuujjuaq, Nunavik, Canada," Renewable Energy, Elsevier, vol. 147(P1), pages 1540-1553.
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