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
Analysis of Ejector Performance Using 1-D Model
Fenglei Li,Bo Cao,Qi Tian +2 more
TL;DR: In this article, a modified ejector model for entrainment ratio calculation is proposed based on the sokolov model and experiment data obtained by Huang et al. This model has a good performance in predicting the maximum entraining ratio of ejectors at design conditions.
Compound ejectors with improved off-design performance
Michael Dennis,Keith Garzoli +1 more
TL;DR: In this paper, a modeling study was conducted for a two-stage compound ejector arrangement and it was concluded that about 1/3 of the solar energy should go to the first (low pressure, upstream) ejector and 2/3 to the second ejector for best cooling yield.
Journal ArticleDOI
Investigation on transient response of the direct expansion solar assisted ejector-compression heat pump cycle for water heater
TL;DR: In this article , the transient response characteristics of the direct expansion solar assisted ejector-compression heat pump cycle for water heater are investigated, and relevant experimental items are also conducted to verify the simulation model.
Proceedings ArticleDOI
Experimental Improvement of Ejector Performance Through Numerical Optimization of Nozzle Geometry
Navid Sharifi,Majid Sharifi +1 more
TL;DR: In this paper, a malfunctioning steam ejector is studied experimentally to identify the sources of low compression ratio, and the fastest and most inexpensive way of improving the device performance was considered as replacing just the primary nozzle and without any further change in ejector's geometry.
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.