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Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerant

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  • Yan, Jia
  • Cai, Wenjian
  • Li, Yanzhong

Abstract

In this paper, a CFD model calibrated by the experimental results from initial designed ejector is used to evaluate the influence of 6 key geometry parameters on the performance (entrainment ratio) of an air-cooled ejector cooling system and, consequently, to find the best design parameters. A new ejector according to the findings from the CFD simulation is then designed and used at the same air-cooled ejector system to verify the simulation results. From both simulation and testing results, we find that: 1) the optimal area ratio, the ratio of primary nozzle exist position and length of constant-area mixing section to primary nozzle diameter are lower than those of water-cooled ejector systems; 2) the optimal converging angle of constant-pressure mixing section and the ratio of primary nozzle exit position and length of constant-area mixing section to the diameter of constant-area mixing section are very close to those of water-cooled ejector systems; 3) substantial performance improvement can be achieved by using the new parameters in the ejector design.

Suggested Citation

  • Yan, Jia & Cai, Wenjian & Li, Yanzhong, 2012. "Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerant," Renewable Energy, Elsevier, vol. 46(C), pages 155-163.
    • Handle: RePEc:eee:renene:v:46:y:2012:i:c:p:155-163
    DOI: 10.1016/j.renene.2012.03.031
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    References listed on IDEAS

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    Cited by:

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    2. Lou, Juwei & Wang, Jiangfeng & Chen, Liangqi & Wang, Yikai & Zhao, Pan & Wang, Shunsen, 2023. "Multi-objective optimization and off-design performance evaluation of coaxial turbomachines for a novel energy storage-based recuperated S–CO2 Brayton cycle driven by nuclear energy," Energy, Elsevier, vol. 275(C).
    3. 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.
    4. Tang, Yongzhi & Liu, Zhongliang & Li, Yanxia & Shi, Can & Lv, Chen, 2019. "A combined pressure regulation technology with multi-optimization of the entrainment passage for performance improvement of the steam ejector in MED-TVC desalination system," Energy, Elsevier, vol. 175(C), pages 46-57.
    5. Lin, Chen & Cai, Wenjian & Li, Yanzhong & Yan, Jia & Hu, Yu, 2012. "The characteristics of pressure recovery in an adjustable ejector multi-evaporator refrigeration system," Energy, Elsevier, vol. 46(1), pages 148-155.
    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. Braimakis, Konstantinos, 2021. "Solar ejector cooling systems: A review," Renewable Energy, Elsevier, vol. 164(C), pages 566-602.
    8. 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).
    9. Wu, Yifei & Zhao, Hongxia & Zhang, Cunquan & Wang, Lei & Han, Jitian, 2018. "Optimization analysis of structure parameters of steam ejector based on CFD and orthogonal test," Energy, Elsevier, vol. 151(C), pages 79-93.
    10. 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).
    11. Li, Shengyu & Yan, Jia & Liu, Zhan & Yao, Yong & Li, Xianbi & Wen, Na & Zou, Guorong, 2019. "Optimization on crucial ejector geometries in a multi-evaporator refrigeration system for tropical region refrigerated trucks," Energy, Elsevier, vol. 189(C).
    12. Wang, Chen & Wang, Lei & Wang, Xinli & Zhao, Hongxia, 2017. "Design and numerical investigation of an adaptive nozzle exit position ejector in multi-effect distillation desalination system," Energy, Elsevier, vol. 140(P1), pages 673-681.

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