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Investigation of the ejector nozzle in refrigeration system

Author

Listed:
  • Chen, Jianyong
  • Li, Yunhai
  • Chen, Weixiong
  • Luo, Xianglong
  • Chen, Ying
  • Yang, Zhi
  • Eames, Ian W.

Abstract

This study presents a model for quantifying the performance of primary nozzles within the context of ejectors in the refrigeration systems. The effects of real and ideal gas properties are compared and two equations for the two-phase speed of sound are tested against experimental data for vapor nozzles working with R245fa, N2 and R141b and also a two-phase nozzles processing CO2. Results show that the predicited performance of ejector nozzles based on the ideal gas assumptions can be greatly different from that based on the real fluid properties. For the two-phase nozzle the value of the speed of sound is important as it was found to be because errors in this lead to large differences in the nozzle performance and even predictions of nozzle efficiency values greater than one. It is expected that this paper and the study described within will be useful for those wishing to model or design ejector nozzles and contributes to the further understanding of related investigations, especially on the two-phase nozzle.

Suggested Citation

  • Chen, Jianyong & Li, Yunhai & Chen, Weixiong & Luo, Xianglong & Chen, Ying & Yang, Zhi & Eames, Ian W., 2018. "Investigation of the ejector nozzle in refrigeration system," Energy, Elsevier, vol. 157(C), pages 571-587.
    • Handle: RePEc:eee:energy:v:157:y:2018:i:c:p:571-587
    DOI: 10.1016/j.energy.2018.05.172
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    References listed on IDEAS

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    1. Chen, Jianyong & Jarall, Sad & Havtun, Hans & Palm, Björn, 2015. "A review on versatile ejector applications in refrigeration systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 67-90.
    2. Chen, Weixiong & Shi, Chaoyin & Zhang, Shuangping & Chen, Huiqiang & Chong, Daotong & Yan, Junjie, 2017. "Theoretical analysis of ejector refrigeration system performance under overall modes," Applied Energy, Elsevier, vol. 185(P2), pages 2074-2084.
    3. Zhu, Yinhai & Jiang, Peixue, 2014. "Bypass ejector with an annular cavity in the nozzle wall to increase the entrainment: Experimental and numerical validation," Energy, Elsevier, vol. 68(C), pages 174-181.
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    Cited by:

    1. Li, Hao & Gong, Xiufeng & Xu, Wenjie & Li, Minxia & Dang, Chaobin, 2020. "Effects of climate on the solar-powered R1234ze/CO2 cascade cycle for space cooling," Renewable Energy, Elsevier, vol. 153(C), pages 870-883.
    2. Lixing Zheng & Yiyan Zhang & Lifen Hao & Haojie Lian & Jianqiang Deng & Wei Lu, 2022. "Modelling, Optimization, and Experimental Studies of Refrigeration CO 2 Ejectors: A Review," Mathematics, MDPI, vol. 10(22), pages 1-23, November.
    3. Chen, Hongjie & Zhu, Jiahua & Ge, Jing & Lu, Wei & Zheng, Lixing, 2020. "A cylindrical mixing chamber ejector analysis model to predict the optimal nozzle exit position," Energy, Elsevier, vol. 208(C).
    4. Niu, Leilei & Zhang, Xiaobing, 2024. "Comparison of the performance enhancement of vacuum ejector by means of structure optimization and bypass methods," Energy, Elsevier, vol. 297(C).
    5. Khafaji, H.K. & Shahsavand, A. & Shooshtari, S. H. Rajaee, 2024. "Simultaneous optimization of crude oil refinery vacuum distillation column and corresponding ejector system," Energy, Elsevier, vol. 294(C).
    6. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2019. "A comprehensive review of ejector design, performance, and applications," Applied Energy, Elsevier, vol. 240(C), pages 138-172.
    7. Bi, Rongshan & Chen, Chen & Li, Jiansong & Tan, Xinshun & Xiang, Shuguang, 2018. "Research on the CFD numerical simulation of flash boiling atomization," Energy, Elsevier, vol. 165(PA), pages 768-781.

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