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Journal ArticleDOI

A 1-D analysis of ejector performance

TLDR
In this paper, a 1D analysis for the prediction of ejector performance at critical-mode operation is carried out, where constant pressure mixing is assumed to occur inside the constant-area section of the ejector and the entrained flow at choking condition is analyzed.
Abstract
A 1-D analysis for the prediction of ejector performance at critical-mode operation is carried out in the present study. Constant-pressure mixing is assumed to occur inside the constant-area section of the ejector and the entrained flow at choking condition is analyzed. We also carried out an experiment using 11 ejectors and R141b as the working fluid to verify the analytical results. The test results are used to determine the coefficients, h p, h s, f p and f m defined in the 1-D model by matching the test data with the analytical results. It is shown that the1-D analysis using the empirical coefficients can accurately predict the performance of the ejectors. q 1999 Elsevier Science Ltd and IIR. All rights reserved.

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Citations
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A Method for Prediction of Gas/Gas Ejector Performance

TL;DR: A study was performed to establish a simpler methodology for ejector design and for the prediction of performance, based on published results by manufacturers and literature survey, and a thermodynamic spreadsheet model was prepared based on equations.
Journal ArticleDOI

Design and performance analysis of an ejector-equipped Joule–Thomson cryocooler

TL;DR: In this paper, a 1-D ejector model and a finite element model of CFHXs and a 3-D finite-element model of a JT cryocooler were developed to optimize the ejector performance.
Journal ArticleDOI

Triple-Choking Model for Ejector

TL;DR: In this article, a triple-choking model has been developed using the governing equations of the compressible fluids and thermodynamics properties based on the frictional adiabatic fluid study.
Journal ArticleDOI

The Ejector Performance of a 75 kW Molten Carbonate Fuel Cell System

TL;DR: In this article, an ejector was used to safely recycle anode tail gas in a 75 kW molten carbonate fuel cell (MCFC) system at Korea Electric Power Research Institute.
Journal ArticleDOI

Optimal Nozzle Exit Position for a Single-Phase Ejector (Experimental, Numerical and Thermodynamic Modelling)

TL;DR: In this article , the impact of the nozzle head exit position (NXP) on the ejector performance was investigated using the Reynolds-Averaged Navier Stokes (RANS) model.
References
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Journal ArticleDOI

A theoretical and experimental study of a small-scale steam jet refrigerator

TL;DR: In this paper, a small-capacity steam jet refrigerator has been tested with boiler temperatures in the range 120-140°C and the experimental data were found to be within 85% of the theoretical values.
Journal ArticleDOI

A small capacity steam-ejector refrigerator: experimental investigation of a system using ejector with movable primary nozzle

TL;DR: In this article, an experimental study of a steam-ejector refrigerator using an ejector with a primary nozzle that could be moved axially within the mixing chamber section was performed.
Journal ArticleDOI

Variable geometry ejectors and their applications in ejector refrigeration systems

TL;DR: In this article, the effect of ejector geometries on performance was analyzed for a 5kW steam-jet refrigerator with variable-geometry ejectors, including flow rates, entrainment ratio and ejector geometry.
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