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Experimental parametric investigation of vapor ejector for refrigeration applications

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  • Poirier, Michel
  • Giguère, Daniel
  • Sapoundjiev, Hristo

Abstract

A prototype ejector system having a nominal cooling capacity of 30 kW was used to study the influence of ejector geometry and operating conditions on the ejector performance. Experiments were realized over a wide parameter range: primary inlet pressure from 1700 to 2900 kPa; secondary inlet pressure from 170 to 550 kPa; outlet pressure from 350 to 1000 kPa. The performance was evaluated in terms of the entrainment ratio and the temperature lift. The experimental results led to the following observations: (a) A simple calculation of the primary mass flow rate can be used for the design of ejector systems; (b) A given ejector operated at fixed primary inlet pressure shows a range of outlet pressures where the entrainment ratio is maximum. A correlation of the optimal entrainment ratio versus the primary pressure is proposed; (c) There is an inverse relationship between the temperature lift and the entrainment ratio; (d) For a fixed primary inlet pressure, the optimal outlet pressure can be set at a given value by the appropriate geometry of the ejector. Finally, a two-plateau behavior of entrainment ratio as a function of outlet pressure was observed, which might be related to an improper nozzle exit position.

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  • Poirier, Michel & Giguère, Daniel & Sapoundjiev, Hristo, 2018. "Experimental parametric investigation of vapor ejector for refrigeration applications," Energy, Elsevier, vol. 162(C), pages 1287-1300.
    • Handle: RePEc:eee:energy:v:162:y:2018:i:c:p:1287-1300
    DOI: 10.1016/j.energy.2018.08.034
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    References listed on IDEAS

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    1. Reddick, Christopher & Sorin, Mikhail & Rheault, Fernand, 2014. "Energy savings in CO2 (carbon dioxide) capture using ejectors for waste heat upgrading," Energy, Elsevier, vol. 65(C), pages 200-208.
    2. Reddick, Christopher & Sorin, Mikhail & Sapoundjiev, Hristo & Aidoun, Zine, 2016. "Carbon capture simulation using ejectors for waste heat upgrading," Energy, Elsevier, vol. 100(C), pages 251-261.
    3. Chen, Xiangjie & Omer, Siddig & Worall, Mark & Riffat, Saffa, 2013. "Recent developments in ejector refrigeration technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 19(C), pages 629-651.
    4. Chunnanond, Kanjanapon & Aphornratana, Satha, 2004. "Ejectors: applications in refrigeration technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 8(2), pages 129-155, April.
    5. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
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    Cited by:

    1. Mouhammad El Hassan, 2022. "System COP of Ejector-Based Ground-Source Heat Pumps," Energies, MDPI, vol. 15(22), pages 1-14, November.
    2. Al-Nimr, Moh’d Ahmad & Tashtoush, Bourhan & Hasan, Alabas, 2020. "A novel hybrid solar ejector cooling system with thermoelectric generators," Energy, Elsevier, vol. 198(C).
    3. 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).
    4. 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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