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Improvement and experimental research of CO2 two-rolling piston expander

Author

Listed:
  • Hu, Jing
  • Li, Minxia
  • Zhao, Li
  • Xia, Borui
  • Ma, Yitai

Abstract

Owing to the poor performance of the previous CO2 two-rolling piston expander prototype, improvements were made to increase its efficiency. The improvement measures included increasing the expansion ratio by minimizing the size of the intermediate channel and adopting some sealing methods to block the leakages, such as integrating the intermediate plate and filling O-rings in the seal grooves of the end covers. To reduce the leakage and irreversible losses, lubrication of the expander was investigated as a measure. The improved expander was tested in the CO2 water-to-water heat pump system. The experimental results showed that the revised expander had a much higher efficiency compared to the primary one, reaching a maximum of 77% at the revolution speed of 867 rpm, and a maximum recovered expansion work of 242 W at the revolution speed of 770 rpm. However, further improvement of the expander is necessary because the measured parameters of the prototype do not yet approach the design values.

Suggested Citation

  • Hu, Jing & Li, Minxia & Zhao, Li & Xia, Borui & Ma, Yitai, 2015. "Improvement and experimental research of CO2 two-rolling piston expander," Energy, Elsevier, vol. 93(P2), pages 2199-2207.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p2:p:2199-2207
    DOI: 10.1016/j.energy.2015.10.097
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    References listed on IDEAS

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    1. Jiang, Yuntao & Ma, Yitai & Fu, Lin & Li, Minxia, 2013. "Some design features of CO2 two-rolling piston expander," Energy, Elsevier, vol. 55(C), pages 916-924.
    2. Yamada, Noboru & Watanabe, Masataka & Hoshi, Akira, 2013. "Experiment on pumpless Rankine-type cycle with scroll expander," Energy, Elsevier, vol. 49(C), pages 137-145.
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    Cited by:

    1. Bo Zhang & Liu Chen & Lang Liu & Xiaoyan Zhang & Mei Wang & Changfa Ji & KI-IL Song, 2018. "Parameter Sensitivity Study for Typical Expander-Based Transcritical CO 2 Refrigeration Cycles," Energies, MDPI, vol. 11(5), pages 1-20, May.
    2. Wronski, Jorrit & Imran, Muhammad & Skovrup, Morten Juel & Haglind, Fredrik, 2019. "Experimental and numerical analysis of a reciprocating piston expander with variable valve timing for small-scale organic Rankine cycle power systems," Applied Energy, Elsevier, vol. 247(C), pages 403-416.
    3. Francesconi, Marco & Dori, Edoardo & Antonelli, Marco, 2019. "Analysis of Balje diagrams for a Wankel expander prototype," Applied Energy, Elsevier, vol. 238(C), pages 775-785.
    4. Yap, Ken Shaun & Ooi, Kim Tiow & Chakraborty, Anutosh, 2018. "Analysis of the novel cross vane expander-compressor: Mathematical modelling and experimental study," Energy, Elsevier, vol. 145(C), pages 626-637.
    5. Rajib Uddin Rony & Huojun Yang & Sumathy Krishnan & Jongchul Song, 2019. "Recent Advances in Transcritical CO 2 (R744) Heat Pump System: A Review," Energies, MDPI, vol. 12(3), pages 1-35, January.
    6. Singh, Simarpreet & Dasgupta, MS, 2016. "Evaluation of research on CO2 trans-critical work recovery expander using multi attribute decision making methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 119-129.

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