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Energy Analysis of a Dual-Source Heat Pump Coupled with Phase Change Materials

Author

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  • Michele Bottarelli

    (Department of Architecture, University of Ferrara, Via Quartieri 8, 44121 Ferrara, Italy)

  • Francisco Javier González Gallero

    (Escuela Politécnica Superior de Algeciras, University of Cádiz, Avenida Ramón Puyol, s/n, 11202 Algeciras, Spain)

Abstract

Installation costs of ground heat exchangers (GHEs) make the technology based on ground-coupled heat pumps (GCHPs) less competitive than air source heat pumps for space heating and cooling in mild climates. A smart solution is the dual source heat pump (DSHP) which switches between the air and ground to reduce frosting issues and save the system against extreme temperatures affecting air-mode. This work analyses the coupling of DSHP with a flat-panel (FP) horizontal GHE (HGHE) and a mixture of sand and phase change materials (PCMs). From numerical simulations and considering the energy demand of a real building in Northern Italy, different combinations of heat pumps (HPs) and trench backfill material were compared. The results show that PCMs always improve the performance of the systems, allowing a further reduction of the size of the geothermal facility. Annual average heat flux at FP is four times higher when coupled with the DSHP system, due to the lower exploitation. Furthermore, the enhanced dual systems are able to perform well during extreme weather conditions for which a sole air source heat pump (ASHP) system would be unable either to work or perform efficiently. Thus, the DSHP and HGHE with PCMs are robust and resilient alternatives for air conditioning.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2933-:d:368579
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    References listed on IDEAS

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    1. 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.
    2. José M Corberán & Antonio Cazorla-Marín & Javier Marchante-Avellaneda & Carla Montagud, 2018. "Dual source heat pump, a high efficiency and cost-effective alternative for heating, cooling and DHW production," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 13(2), pages 161-176.
    3. Yang, Weibo & Xu, Rui & Yang, Binbin & Yang, Jingjing, 2019. "Experimental and numerical investigations on the thermal performance of a borehole ground heat exchanger with PCM backfill," Energy, Elsevier, vol. 174(C), pages 216-235.
    4. Yu Jin Nam & Xin Yang Gao & Sung Hoon Yoon & Kwang Ho Lee, 2015. "Study on the Performance of a Ground Source Heat Pump System Assisted by Solar Thermal Storage," Energies, MDPI, vol. 8(12), pages 1-17, November.
    5. Bayer, Peter & Saner, Dominik & Bolay, Stephan & Rybach, Ladislaus & Blum, Philipp, 2012. "Greenhouse gas emission savings of ground source heat pump systems in Europe: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(2), pages 1256-1267.
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    Cited by:

    1. Cao, Jingyu & Zheng, Ling & Peng, Jinqing & Wang, Wenjie & Leung, Michael K.H. & Zheng, Zhanying & Hu, Mingke & Wang, Qiliang & Cai, Jingyong & Pei, Gang & Ji, Jie, 2023. "Advances in coupled use of renewable energy sources for performance enhancement of vapour compression heat pump: A systematic review of applications to buildings," Applied Energy, Elsevier, vol. 332(C).
    2. Wang, Zhaoyu & Feng, Weijian & Zhang, Nan & Zhang, Jinghong & Li, Qi & Wang, Weida & Rui, Chaofeng & Wang, Mao & Tang, Junjie & Zheng, Dechen, 2024. "Experimental study on enhanced heat transfer mechanism of U-shaped buried pipe by bio-microbial method," Renewable Energy, Elsevier, vol. 224(C).
    3. Bottarelli, Michele & Baccega, Eleonora & Cesari, Silvia & Emmi, Giuseppe, 2022. "Role of phase change materials in backfilling of flat-panels ground heat exchanger," Renewable Energy, Elsevier, vol. 189(C), pages 1324-1336.

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