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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Journal ArticleDOI
Parametric study on dynamic heat and mass transfer response in polymer electrolyte membrane fuel cell for automotive applications
Min Soo Kim,Dong Kyu Kim +1 more
TL;DR: In this article, the authors developed a system-level model to analyze dynamic behavior of fuel cell car applied with a variable pressure system consisting blower and back pressure control valve at cathode.
Journal ArticleDOI
Parametric Analysis and Comparison of Ejector Expansion Refrigeration Cycles With Constant Area and Constant Pressure Ejectors
Journal ArticleDOI
Experimental study of a new ejector-absorption refrigeration cycle driven by multi-heat sources
TL;DR: In this paper, the authors proposed a new ejector-absorption refrigeration cycle driven by two heat sources at different temperature levels to realize the economic optimization in low-grade heat recovery application.
Journal ArticleDOI
Comparison of CFD and experimental performance results of a variable area ratio steam ejector
TL;DR: In this paper, experimental and computational fluid dynamics (CFD) results for a 5kW-rated capacity steam ejector, with a variable primary nozzle geometry, are presented and compared.
Journal ArticleDOI
Evaluation on environment-friendly refrigerants with similar normal boiling points in ejector refrigeration system
F. Wang,Shengqiang Shen,D. Y. Li +2 more
TL;DR: Based on the Hypothetical Throat Area (THA) theory and the Constant Pressure Mixing (CPM) theory, a thermodynamic model for ejector was set up by introducing the real properties of refrigerants as discussed by the authors.
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.