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Design of cylindrical mixing chamber ejector according to performance analyses

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  • Lu, Wei
  • Chen, Hongjie

Abstract

A design method for cylindrical mixing chamber ejector according to performance analyses is proposed based on the real gas properties. Compared with the experimental data, the entrainment ratio and critical back pressure calculated by the proposed method have errors within ±17% and ±6%, respectively. Ejectors with common characteristic sizes using steam, ammonia, R290 and R134a as working fluids are analyzed by this method. Consequently, design curves and regressive expressions are provided to describe the relations between entrainment ratios, ejector area ratios and expansion and compression ratios, as well as the relations between nozzle area ratios and expansion ratios. The expressions of nozzle throat areas are regressed for steam ejectors at 75–130 °C, as well as for ammonia, R290 and R134a ejectors at 75–95 °C. The design curves and regressive expressions provided by this paper can be used to design ejectors with cylindrical mixing chamber accurately and conveniently.

Suggested Citation

  • Lu, Wei & Chen, Hongjie, 2018. "Design of cylindrical mixing chamber ejector according to performance analyses," Energy, Elsevier, vol. 164(C), pages 594-601.
    • Handle: RePEc:eee:energy:v:164:y:2018:i:c:p:594-601
    DOI: 10.1016/j.energy.2018.09.025
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    References listed on IDEAS

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    1. Mondal, Subha & De, Sudipta, 2017. "Ejector based organic flash combined power and refrigeration cycle (EBOFCP&RC) – A scheme for low grade waste heat recovery," Energy, Elsevier, vol. 134(C), pages 638-648.
    2. Xia, Jiaxi & Wang, Jiangfeng & Zhou, Kehan & Zhao, Pan & Dai, Yiping, 2018. "Thermodynamic and economic analysis and multi-objective optimization of a novel transcritical CO2 Rankine cycle with an ejector driven by low grade heat source," Energy, Elsevier, vol. 161(C), pages 337-351.
    3. Karthick, S.K. & Rao, Srisha M.V. & Jagadeesh, G. & Reddy, K.P.J., 2018. "Experimental parametric studies on the performance and mixing characteristics of a low area ratio rectangular supersonic gaseous ejector by varying the secondary flow rate," Energy, Elsevier, vol. 161(C), pages 832-845.
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    Cited by:

    1. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    2. Ge, Jing & Chen, Hongjie & Jin, Yang & Li, Jun, 2023. "Conical-cylindrical mixer ejector design model for predicting optimal nozzle exit position," Energy, Elsevier, vol. 283(C).

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