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Experimental and numerical investigations on the effect of suction chamber angle and nozzle exit position of a steam-jet ejector

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  • Ramesh, A.S.
  • Sekhar, S. Joseph

Abstract

Implementation of renewable energy in existing applications has become an emerging trend in order to mitigate the environmental issues. Specifically, HVAC sector urges for more efficient and eco-friendly systems which can effectively replace the high grade energy in conventional systems. One of such promising environmental friendly systems is the ejector refrigeration system which has low initial and operating costs, simple system components and trouble free operation. In spite of these merits, it suffers from low performance due to the complex irreversible fluid flow prevailing in the ejector. Comprehensive analysis and understanding of all the geometrical and operating parameters governing the ejector flow are vital for increasing the performance of the entire system. In this study, the most crucial geometrical parameters such as suction chamber angle and the Nozzle Exit Position (NXP) of a steam operated ejector are systematically investigated using CFD and experimental techniques. The influence of operating conditions with respect to the geometrical parameters has been observed, and for the tested conditions of 700 W evaporator at 10 °C cooling temperature the suction chamber angle of 12° and the corresponding NXP of 24.7 mm delivered an optimum performance for the active and back pressures of 2 bar and 43 mbar respectively.

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  • Ramesh, A.S. & Sekhar, S. Joseph, 2018. "Experimental and numerical investigations on the effect of suction chamber angle and nozzle exit position of a steam-jet ejector," Energy, Elsevier, vol. 164(C), pages 1097-1113.
    • Handle: RePEc:eee:energy:v:164:y:2018:i:c:p:1097-1113
    DOI: 10.1016/j.energy.2018.09.010
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    References listed on IDEAS

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    1. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    2. Sankarlal, T. & Mani, A., 2007. "Experimental investigations on ejector refrigeration system with ammonia," Renewable Energy, Elsevier, vol. 32(8), pages 1403-1413.
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    Cited by:

    1. 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).
    2. Lixing Zheng & Hongwei Hu & Weibo Wang & Yiyan Zhang & Lingmei Wang, 2022. "Study on Flow Distribution and Structure Optimization in a Mix Chamber and Diffuser of a CO 2 Two-Phase Ejector," Mathematics, MDPI, vol. 10(5), pages 1-16, February.
    3. Kuo, Jenn-Kun & Hsieh, Chun-Yao, 2021. "Numerical investigation into effects of ejector geometry and operating conditions on hydrogen recirculation ratio in 80 kW PEM fuel cell system," Energy, Elsevier, vol. 233(C).
    4. Mouhammad El Hassan, 2022. "System COP of Ejector-Based Ground-Source Heat Pumps," Energies, MDPI, vol. 15(22), pages 1-14, November.
    5. Fatong Jia & Dazhang Yang & Jing Xie, 2021. "Numerical Investigation on the Performance of Two-Throat Nozzle Ejectors with Different Mixing Chamber Structural Parameters," Energies, MDPI, vol. 14(21), pages 1-16, October.
    6. Wen, Chuang & Rogie, Brice & Kærn, Martin Ryhl & Rothuizen, Erasmus, 2020. "A first study of the potential of integrating an ejector in hydrogen fuelling stations for fuelling high pressure hydrogen vehicles," Applied Energy, Elsevier, vol. 260(C).
    7. Llorenç Macia & Robert Castilla & Pedro Javier Gamez-Montero & Gustavo Raush, 2022. "Multi-Factor Design for a Vacuum Ejector Improvement by In-Depth Analysis of Construction Parameters," Sustainability, MDPI, vol. 14(16), pages 1-16, August.
    8. Yang, Yan & Karvounis, Nikolas & Walther, Jens Honore & Ding, Hongbing & Wen, Chuang, 2021. "Effect of area ratio of the primary nozzle on steam ejector performance considering nonequilibrium condensations," Energy, Elsevier, vol. 237(C).
    9. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.

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