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Performance comparison between R410A and R32 multi-heat pumps with a sub-cooler vapor injection in the heating and cooling modes

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  • Cho, Il Yong
  • Seo, HyeongJoon
  • Kim, Dongwoo
  • Kim, Yongchan

Abstract

The cooling and heating performances of R410A and R32 multi-heat pumps with a sub-cooler vapor injection (SCVI) were measured and compared with variations in the outdoor temperature, compressor speed, and injection ratio. Optimum injection ratios were determined to obtain maximum cooling and heating performances at a given operating condition. In the cooling mode with the optimum injection ratios, the R410A and R32 multi-heat pumps with vapor injection showed 2.1%–6.3% higher cooling capacity than those without vapor injection. In the heating mode, the R410A and R32 multi-heat pumps with vapor injection showed 7.5%–13.9% higher heating capacity than those without vapor injection, while showing 2.6%–7.0% and 1.1%–4.7% higher COPs, respectively. In addition, the SCVI cycle was more effective for improving the cooling and heating performances under extremely hot and cold weather conditions, respectively.

Suggested Citation

  • Cho, Il Yong & Seo, HyeongJoon & Kim, Dongwoo & Kim, Yongchan, 2016. "Performance comparison between R410A and R32 multi-heat pumps with a sub-cooler vapor injection in the heating and cooling modes," Energy, Elsevier, vol. 112(C), pages 179-187.
    • Handle: RePEc:eee:energy:v:112:y:2016:i:c:p:179-187
    DOI: 10.1016/j.energy.2016.06.069
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    References listed on IDEAS

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    Cited by:

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    2. Kim, Dongwoo & Myeong, Seongryeol & Cha, Dowon & Kim, Yongchan, 2019. "Novel optimized operating strategies of two-phase injection heat pumps for achieving best performance with safe compression," Energy, Elsevier, vol. 187(C).
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    6. Maeng, Heegyu & Kim, Jinyoung & Kwon, Soonbum & Kim, Yongchan, 2023. "Energy and environmental performance of vapor injection heat pumps using R134a, R152a, and R1234yf under various injection conditions," Energy, Elsevier, vol. 280(C).
    7. Yuan, Zhipeng & Liu, Qi & Luo, Baojun & Li, Zhenming & Fu, Jianqin & Chen, Jingwei, 2018. "Thermodynamic analysis of different oil flooded compression enhanced vapor injection cycles," Energy, Elsevier, vol. 154(C), pages 553-560.
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    10. Hongzhi Liu & Katsunori Nagano & Takao Katsura & Yue Han, 2020. "Experimental Investigation on a Vapor Injection Heat Pump System with a Single-Stage Compressor," Energies, MDPI, vol. 13(12), pages 1-19, June.
    11. Kim, Dongwoo & Lee, DongChan & Lee, Minwoo & Chung, Hyun Joon & Kim, Yongchan, 2021. "Energy performance evaluation of two-phase injection heat pump employing low-GWP refrigerant R32 under various outdoor conditions," Energy, Elsevier, vol. 214(C).
    12. Wei, Wenzhe & Ni, Long & Li, Shuyi & Wang, Wei & Yao, Yang & Xu, Laifu & Yang, Yahua, 2020. "A new frosting map of variable-frequency air source heat pump in severe cold region considering the variation of heating load," Renewable Energy, Elsevier, vol. 161(C), pages 184-199.
    13. López-Belchí, Alejandro & Illán-Gómez, Fernando, 2017. "Evaluation of a condenser based on mini-channels technology working with R410A and R32. Experimental data and performance estimate," Applied Energy, Elsevier, vol. 202(C), pages 112-124.
    14. Jeon, Yongseok & Jung, Jongho & Kim, Dongwoo & Kim, Sunjae & Kim, Yongchan, 2017. "Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor," Applied Energy, Elsevier, vol. 205(C), pages 761-768.
    15. Chung, Hyun Joon & Baek, Changhyun & Kang, Hoon & Kim, Dongwoo & Kim, Yongchan, 2018. "Performance evaluation of a gas injection CO2 heat pump according to operating parameters in extreme heating and cooling conditions," Energy, Elsevier, vol. 154(C), pages 337-345.
    16. Settino, Jessica & Sant, Tonio & Micallef, Christopher & Farrugia, Mario & Spiteri Staines, Cyril & Licari, John & Micallef, Alexander, 2018. "Overview of solar technologies for electricity, heating and cooling production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 892-909.
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    More about this item

    Keywords

    Vapor injection; Multi-heat pump; Injection ratio; R410A; R32;
    All these keywords.

    JEL classification:

    • R32 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Real Estate Markets, Spatial Production Analysis, and Firm Location - - - Other Spatial Production and Pricing Analysis

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