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.read more
Citations
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Dissertation
An integrated modeling approach for design and optimization of ejector pumps carrying two-phase fluid
Coupled Thermodynamic And CFD Approaches Applied To A Supersonic Air Ejector
TL;DR: In this paper, a comparison of ejector performance prediction between a thermodynamic model and a Computational Fluid Dynamics (CFD) model for different operating conditions is presented. And the results show that identical inlet pressure and temperature ratios induce the same entrainment ratio as well as the same critical and limiting pressure ratios.
Journal ArticleDOI
Review and analysis of hydrogen recirculation devices for compact vehicular proton exchange membrane fuel cells
TL;DR: In this article , the ejector in parallel with a regenerative compressor combines the advantages of each, with ability to cover the entire range of operating conditions in line with future directions and developmental targets.
Journal ArticleDOI
Exergetic and financial parametric analyses and multi-objective optimization of a novel geothermal-driven cogeneration plant; adopting a modified dual binary technique
Yan Cao,Hayder A. Dhahad,Hussein Togun,Hasanen M. Hussen,Tarik A. Rashid,Ali E. Anqi,Naeim Farouk,Naeim Farouk,Alibek Issakhov,Alibek Issakhov +9 more
TL;DR: In this article, a parametric study has been implemented to analyze the effect of several main parameters on the vital variables including efficiencies, exergy destruction rate, sum unit exergy cost, investment cost rate, and exergoeconomic factor.
Proceedings ArticleDOI
Numerical Investigation of the Effects of Steam Nucleation on the Steam Ejectors Performance
TL;DR: In this paper, a numerical simulation of a steam ejector at normal operation is undertaken, and the results show a strengthened shock wave under the assumption of wet steam which leads to an intensified pressure recovery inside the ejector.
References
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Journal ArticleDOI
An Investigation of Ejector Design by Analysis and Experiment
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 New Ejector Theory Applied to Steam Jet Refrigeration
John T. Munday,David F. Bagster +1 more
Journal ArticleDOI
A small capacity steam-ejector refrigerator: experimental investigation of a system using ejector with movable primary nozzle
Satha Aphornratana,Ian W. Eames +1 more
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.