Treffer: Enhancing steam pressure ejector efficiency through numerical investigation of key geometric parameters.

Steam pressure ejectors (SPEs) are crucial components in steam heating systems, enabling efficient integration of steam from multiple sources. This study aims to optimize the values of three key geometric parameters – nozzle exit position (NXP), constant-area mixing chamber length (LAM), and diameter ratio (DR) – through numerical simulations. Dimensionless parameters are introduced to describe these values uniformly, providing a generalized method for cross-system optimization. The results indicate that optimizing dimensionless ${\rm{NX}}{P^*}$ NX P ∗ = 0.125 increases the entrainment coefficient by 12.9%. Shorter LAM limits the effective intake of low-pressure steam. As the dimensionless ${\rm{LA}}{M^*}$ LA M ∗ increases, the entrainment coefficient rises, but beyond 4.17, the efficiency gains are minimal, while the equipment size increases significantly. DR values greater than 1.5 result in performance degradation, establishing definitive threshold values for optimization. Within the optimal exit pressure range, the entrainment coefficient remains stable and performance remains optimal; beyond this range, the ejector enters the "failure zone." This study presents a systematic optimization approach for SPE design, with the potential to enhance efficiency and stability, and offers actionable insights for industrial applications. [ABSTRACT FROM AUTHOR]

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