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Experimental results of transcritical CO2 heat pump for residential application

Author

Listed:
  • Richter, M.R.
  • Song, S.M.
  • Yin, J.M.
  • Kim, M.H.
  • Bullard, C.W.
  • Hrnjak, P.S.

Abstract

This paper describes experiments comparing a commercially available R410A heat pump and prototype R744 (carbon dioxide) system in heating mode. The R744 system utilizes aluminum microchannel heat exchangers and a prototype semi-hermetic compressor. System performance is compared for two configurations: first, when the R744 compressor speed is set to match the baseline system’s heating capacity at 8.2 °C outdoors and 21.1 °C indoors; and second, when the air conditioning capacity is matched at 35 °C outdoors and 26.5 °C indoors. The R744 system operates with a slightly lower heating COP, but its higher capacity at lower outdoor temperatures reduces the need for less efficient supplementary heating capacity.

Suggested Citation

  • Richter, M.R. & Song, S.M. & Yin, J.M. & Kim, M.H. & Bullard, C.W. & Hrnjak, P.S., 2003. "Experimental results of transcritical CO2 heat pump for residential application," Energy, Elsevier, vol. 28(10), pages 1005-1019.
    • Handle: RePEc:eee:energy:v:28:y:2003:i:10:p:1005-1019
    DOI: 10.1016/S0360-5442(03)00065-3
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    Citations

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    Cited by:

    1. Austin, Brian T. & Sumathy, K., 2011. "Transcritical carbon dioxide heat pump systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(8), pages 4013-4029.
    2. Yokoyama, Ryohei & Shimizu, Takeshi & Ito, Koichi & Takemura, Kazuhisa, 2007. "Influence of ambient temperatures on performance of a CO2 heat pump water heating system," Energy, Elsevier, vol. 32(4), pages 388-398.
    3. Aprea, C. & Greco, A. & Maiorino, A., 2012. "An experimental evaluation of the greenhouse effect in the substitution of R134a with CO2," Energy, Elsevier, vol. 45(1), pages 753-761.
    4. Blarke, Morten B., 2012. "Towards an intermittency-friendly energy system: Comparing electric boilers and heat pumps in distributed cogeneration," Applied Energy, Elsevier, vol. 91(1), pages 349-365.
    5. Ohkura, Masashi & Yokoyama, Ryohei & Nakamata, Takuya & Wakui, Tetsuya, 2015. "Numerical analysis on performance enhancement of a CO2 heat pump water heating system by extracting tepid water," Energy, Elsevier, vol. 87(C), pages 435-447.
    6. Wang, Zhihua & Wang, Fenghao & Ma, Zhenjun & Lin, Wenye & Ren, Haoshan, 2019. "Investigation on the feasibility and performance of transcritical CO2 heat pump integrated with thermal energy storage for space heating," Renewable Energy, Elsevier, vol. 134(C), pages 496-508.
    7. Yang, Jun Lan & Ma, Yi Tai & Li, Min Xia & Hua, Jun, 2010. "Modeling and simulating the transcritical CO2 heat pump system," Energy, Elsevier, vol. 35(12), pages 4812-4818.
    8. Zhili, Sun & Minxia, Li & Guangming, Han & Yitai, Ma, 2013. "Performance study of a transcritical carbon dioxide cycle with an expressor," Energy, Elsevier, vol. 60(C), pages 77-86.
    9. Tao, Y.B. & He, Y.L. & Tao, W.Q., 2010. "Exergetic analysis of transcritical CO2 residential air-conditioning system based on experimental data," Applied Energy, Elsevier, vol. 87(10), pages 3065-3072, October.
    10. Yokoyama, Ryohei & Wakui, Tetsuya & Kamakari, Junya & Takemura, Kazuhisa, 2010. "Performance analysis of a CO2 heat pump water heating system under a daily change in a standardized demand," Energy, Elsevier, vol. 35(2), pages 718-728.
    11. Shucai Bai & Fangyi Li & Wu Xie, 2022. "Green but Unpopular? Analysis on Purchase Intention of Heat Pump Water Heaters in China," Energies, MDPI, vol. 15(7), pages 1-19, March.

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