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Evaluation of different heat pump systems for sanitary hot water production using natural refrigerants

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  • Pitarch, Miquel
  • Navarro-Peris, Emilio
  • Gonzálvez-Maciá, José
  • Corberán, José M.

Abstract

Heat pumps that work with a high degree of subcooling in subcritical systems have shown a significant margin of improvement when working with sanitary hot water applications. Recently, two different approaches to overcome the high degree of subcooling have been presented in the literature: with a subcooler (separate from the condenser) and by making all the subcooling in the condenser. In this paper, a comparative evaluation between both alternatives is presented, and the obtained results are compared with a representative solution already available on the market using natural refrigerants for this application. The results of this analysis have shown that in a system with subcooling in the condenser, it is possible to obtain a COP comparable to that of transcritical CO2 heat pump water heaters. Furthermore, the system with subcooling has been demonstrated experimentally as being capable of producing water up to 90°C and has shown a COP up to 20% higher than some CO2 commercial products (catalogue data reference).

Suggested Citation

  • Pitarch, Miquel & Navarro-Peris, Emilio & Gonzálvez-Maciá, José & Corberán, José M., 2017. "Evaluation of different heat pump systems for sanitary hot water production using natural refrigerants," Applied Energy, Elsevier, vol. 190(C), pages 911-919.
    • Handle: RePEc:eee:appene:v:190:y:2017:i:c:p:911-919
    DOI: 10.1016/j.apenergy.2016.12.166
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    References listed on IDEAS

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    Cited by:

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    2. Song, Zhiying & Ji, Jie & Cai, Jingyong & Zhao, Bin & Li, Zhaomeng, 2021. "Investigation on a direct-expansion solar-assisted heat pump with a novel hybrid compound parabolic concentrator/photovoltaic/fin evaporator," Applied Energy, Elsevier, vol. 299(C).
    3. Frank Bruno & Martin Belusko & Edward Halawa, 2019. "CO 2 Refrigeration and Heat Pump Systems—A Comprehensive Review," Energies, MDPI, vol. 12(15), pages 1-39, August.
    4. Ximo Masip & Emilio Navarro-Peris & José M. Corberán, 2020. "Influence of the Thermal Energy Storage Strategy on the Performance of a Booster Heat Pump for Domestic Hot Water Production System Based on the Use of Low Temperature Heat Source," Energies, MDPI, vol. 13(24), pages 1-24, December.
    5. Hervas-Blasco, Estefanía & Pitarch, Miquel & Navarro-Peris, Emilio & Corberán, José M., 2017. "Optimal sizing of a heat pump booster for sanitary hot water production to maximize benefit for the substitution of gas boilers," Energy, Elsevier, vol. 127(C), pages 558-570.
    6. Hervás-Blasco, Estefanía & Navarro-Peris, Emilio & Corberán, José Miguel, 2019. "Optimal design and operation of a central domestic hot water heat pump system for a group of dwellings employing low temperature waste heat as a source," Energy, Elsevier, vol. 188(C).
    7. Guo, Hao & Gong, Maoqiong & Qin, Xiaoyu, 2019. "Performance analysis of a modified subcritical zeotropic mixture recuperative high-temperature heat pump," Applied Energy, Elsevier, vol. 237(C), pages 338-352.
    8. Soares, N. & Bastos, J. & Pereira, L. Dias & Soares, A. & Amaral, A.R. & Asadi, E. & Rodrigues, E. & Lamas, F.B. & Monteiro, H. & Lopes, M.A.R. & Gaspar, A.R., 2017. "A review on current advances in the energy and environmental performance of buildings towards a more sustainable built environment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 845-860.

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