Numerical investigation of the effect of parallel flow primary nozzle on the performance of the supersonic ejector of an ejector refrigeration cycle

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Alyari Shourehdeli SH.; MOBINI K.; ASAKEREH A.

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Paper Information

Journal: JOURNAL OF MECHANICAL ENGINEERING Year:2021 | Volume:50 | Issue:4 (93) Page(s): 239-243

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Title

Numerical investigation of the effect of parallel flow primary nozzle on the performance of the supersonic ejector of an ejector refrigeration cycle

Author(s)

Alyari Shourehdeli SH. | MOBINI K. | ASAKEREH A. | Issue Writer Certificate

Keywords

Ejector

Parallel flow nozzle

Characteristics method

Computational fluid dynamics

Abstract

Ejector is used as a key component in Ejector refrigeration cycle. A supersonic Ejector with optimal performance reduces energy consumption in refrigeration system and improves its performance. In this paper, the effect of using parallel flow primary nozzle on the performance of a supersonic Ejector used in an Ejector refrigeration cycle, with steam as working fluid, is numerically investigated. For this purpose, two primary nozzles, conical and parallel flow, with the same converging portion and the same ratio of exit surface to throat surface, have been used. The parallel-flow nozzle diverging curve is calculated using the characteristic method. Numerical simulations have been performed using the Ansys-Fluent software. The results show that by changing the primary nozzle diverging curve from conical nozzle to Parallel flow nozzle, variation of entrainment ratio in the critical region will be negligible, but in the subcritical region, it is significant. The maximum relative variation of entrainment ratio in subcritical region of the Parallel flow nozzle is +17. 3%. Also, by changing the diverging curve of the primary nozzle, critical pressure increases by 1 mbar and the physics of the Ejector internal flow changes.

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APA: Copy

Alyari Shourehdeli, SH., MOBINI, K., & ASAKEREH, A.. (2021). Numerical investigation of the effect of parallel flow primary nozzle on the performance of the supersonic ejector of an ejector refrigeration cycle. JOURNAL OF MECHANICAL ENGINEERING, 50(4 (93) ), 239-243. SID. https://sid.ir/paper/269800/en

Vancouver: Copy

Alyari Shourehdeli SH., MOBINI K., ASAKEREH A.. Numerical investigation of the effect of parallel flow primary nozzle on the performance of the supersonic ejector of an ejector refrigeration cycle. JOURNAL OF MECHANICAL ENGINEERING[Internet]. 2021;50(4 (93) ):239-243. Available from: https://sid.ir/paper/269800/en

IEEE: Copy

SH. Alyari Shourehdeli, K. MOBINI, and A. ASAKEREH, “Numerical investigation of the effect of parallel flow primary nozzle on the performance of the supersonic ejector of an ejector refrigeration cycle,” JOURNAL OF MECHANICAL ENGINEERING, vol. 50, no. 4 (93) , pp. 239–243, 2021, [Online]. Available: https://sid.ir/paper/269800/en

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