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Changing some of the parameters impacting ejector flow performance in thermal power plant condensers

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Abstract

This study focuses on ejector systems that employ air as the secondary fluid that is suctioned by high-pressure steam as the primary fluid. The multiple steady-state flow regimes that exist inside the ejector have been examined in order to improve ejector performance using vacuum optimum settings and extensive simulations. After thorough analysis, the ejector’s throat length, divergence length, and motive steam pressure were changed. The results of the analysis using finite element method (FEM) Computational Fluid Dynamics were deemed adequate. The relationship between throat length, divergence length, and motive steam pressure was found to have an impact on both suction pressure and ejector performance. Both the throat length (0.3413 m) and the length of the divergence (0.836 m) are determined after evaluating the ejector and making the required changes to obtain a sufficient vacuum. The ideal motive steam pressure for ejector motion is 10 bar. Researchers found that a vacuum of -1.025 bar was preferable to either the standard ejector or other vacuums.

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Abbreviations

FEM:

FEM computational fluid dynamics (CFD) products for engineers who need to make better, faster decisions

Vth :

The ejector throat’s diameter

T:

Throat length

Edv :

length of divergence

Tth :

throat length

ps :

suction pressure

Xm :

motive pressure

Kn :

pressure at discharge

H𝑎 :

mass of air

H𝑠 :

steamy mass

xn :

driving nozzle position

𝜷:

convergence angle

𝜃:

divergence angle

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Authors and Affiliations

  1. Department of Mathematics, Sokoto State University, Sokoto, Nigeria

    Anas Sani Maihulla, Mujitaba Usman & Zayad Shehu

  2. Operation research group, Bayero University, Kano, Nigeria

    Anas Sani Maihulla

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  1. Anas Sani Maihulla
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  2. Mujitaba Usman
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  3. Zayad Shehu
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Correspondence to Mujitaba Usman.

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Maihulla, A.S., Usman, M. & Shehu, Z. Changing some of the parameters impacting ejector flow performance in thermal power plant condensers. Life Cycle Reliab Saf Eng (2024). https://doi.org/10.1007/s41872-024-00251-z

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