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Some design features of CO2 two-rolling piston expander

Author

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  • Jiang, Yuntao
  • Ma, Yitai
  • Fu, Lin
  • Li, Minxia

Abstract

Improving the efficiency of trans-critical CO2 heat pump systems becomes one of the investigative focuses of the development of refrigeration technologies. The use of expander can improve the efficiency of trans-critical CO2 cycles, and make it near to that of traditional refrigeration systems. On the basis of the previously developed single-cylinder rolling piston expander, a new two-rolling piston expander is designed and produced. The design process and its working principles are introduced, and a trans-critical CO2 water–water heat pump system is used to test its efficiency. Results of the tests show that under working conditions the rotating speed of the expander ranges from 850 to 1000 rpm, and its efficiency ranges from 28% to 33%. Analysis of the problems that appeared in the expander is made to further improve its efficiency.

Suggested Citation

  • 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.
  • Handle: RePEc:eee:energy:v:55:y:2013:i:c:p:916-924
    DOI: 10.1016/j.energy.2013.03.053
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    References listed on IDEAS

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    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. Murthy, Anarghya Ananda & Norris, Stuart & Subiantoro, Alison, 2022. "Experimental investigation of internal leakages and effects of lubricating oil on the performance of a four-intersecting-vane rotary expander," Energy, Elsevier, vol. 238(PB).
    4. 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.
    5. Jon Munch-Petersen, 2018. "Public Participation in Environmental Impact Assessment of Hydropower Plants in Nepal: A Contextspecific Approach," Working Papers id:12843, eSocialSciences.
    6. Dai, Baomin & Liu, Shengchun & Zhu, Kai & Sun, Zhili & Ma, Yitai, 2017. "Thermodynamic performance evaluation of transcritical carbon dioxide refrigeration cycle integrated with thermoelectric subcooler and expander," Energy, Elsevier, vol. 122(C), pages 787-800.
    7. Zhang, Zhenying & Li, Minxia & Ma, Yitai & Gong, Xiufeng, 2015. "Experimental investigation on a turbo expander substituted for throttle valve in the subcritical refrigeration system," Energy, Elsevier, vol. 79(C), pages 195-202.
    8. 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.
    9. Wang, Wei & Wu, Yu-ting & Ma, Chong-fang & Xia, Guo-dong & Wang, Jing-fu, 2013. "Experimental study on the performance of single screw expanders by gap adjustment," Energy, Elsevier, vol. 62(C), pages 379-384.
    10. 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.
    11. Imran, Muhammad & Usman, Muhammad & Park, Byung-Sik & Lee, Dong-Hyun, 2016. "Volumetric expanders for low grade heat and waste heat recovery applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1090-1109.

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