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A Study on the Performance of a Cascade Heat Pump for Generating Hot Water

Author

Listed:
  • Samuel Boahen

    (Graduate School of Mechanical Engineering, Hanbat National University, Daejeon 34158, Korea)

  • Jong Min Choi

    (Department of Mechanical Engineering, Hanbat National University, Daejeon 34158, Korea)

Abstract

The use of cascade heat pumps for hot water generation has gained much attention in recent times. The big question that has attracted much research interest is how to enhance the performance and energy saving potential of these cascade heat pumps. This study therefore proposed a new cycle to enhance performance of the cascade heat pump by adopting an auxiliary heat exchanger (AHX) in desuperheater, heater and parallel positions at the low stage (LS) side. The new cascade cycle with AHX in desuperheater position was found to have better performance than that with AHX at heater and parallel positions. Compared to the conventional cycle, heating capacity and coefficient of performance ( COP ) of the new cascade cycle with AHX in desuperheater position increased up to 7.4% and 14.9% respectively.

Suggested Citation

  • Samuel Boahen & Jong Min Choi, 2019. "A Study on the Performance of a Cascade Heat Pump for Generating Hot Water," Energies, MDPI, vol. 12(22), pages 1-20, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:22:p:4313-:d:286226
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    References listed on IDEAS

    as
    1. Park, Hansaem & Kim, Dong Ho & Kim, Min Soo, 2013. "Performance investigation of a cascade heat pump water heating system with a quasi-steady state analysis," Energy, Elsevier, vol. 63(C), pages 283-294.
    2. Chua, K.J. & Chou, S.K. & Yang, W.M., 2010. "Advances in heat pump systems: A review," Applied Energy, Elsevier, vol. 87(12), pages 3611-3624, December.
    3. Wu, Jianghong & Yang, Zhaoguang & Wu, Qinghao & Zhu, Yujuan, 2012. "Transient behavior and dynamic performance of cascade heat pump water heater with thermal storage system," Applied Energy, Elsevier, vol. 91(1), pages 187-196.
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    Cited by:

    1. Boahen, Samuel & Anka, Selorm Kwaku & Lee, Kwang Ho & Choi, Jong Min, 2021. "Performance analysis of cascade multi-functional heat pump in summer season," Renewable Energy, Elsevier, vol. 163(C), pages 1001-1011.
    2. Jakub Szymiczek & Krzysztof Szczotka & Marian Banaś & Przemysław Jura, 2022. "Efficiency of a Compressor Heat Pump System in Different Cycle Designs: A Simulation Study for Low-Enthalpy Geothermal Resources," Energies, MDPI, vol. 15(15), pages 1-19, July.

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