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
Thermodynamic analysis of auto-cascade refrigeration cycles, with and without ejector, for ultra low temperature freezing using a mixture of refrigerants R600a and R1150
Enrique Ángel Rodríguez-Jara,Francisco José Sánchez-de-la-Flor,José Antonio Expósito-Carrillo,José Manuel Salmerón-Lissén +3 more
TL;DR: In this article, the authors proposed two modifications of the auto-cascade system by including an ejector device at the outlet of the phase-separator, while the second modification included the ejector as a precompression stage.
Journal ArticleDOI
Experimental study on a new method for improving the performance of thermal vapor compressors for multi-effect distillation desalination systems
Bing Han,Bing Han,Zhongliang Liu,Zhongliang Liu,Hongqiang Wu,Hongqiang Wu,Yanxia Li,Yanxia Li +7 more
TL;DR: In this article, a new method is proposed to improve the entrainment performance of thermal vapor compressors (TVCs) that are widely used in multi-effect distillation (MED) desalination systems by preheating entrained vapor.
Journal ArticleDOI
A double-choking theory as an explanation of the evolution laws of ejector performance with various operational and geometrical parameters
TL;DR: In this article, a double-choking theory is proposed to provide an in-depth explanation of the evolution laws of ejector performance, and a systematic investigation and quantitative analysis focus on the influences of various operational and geometrical parameters on the ejector choking flows.
Journal ArticleDOI
Thermodynamic modeling and performance analysis of four new integrated organic Rankine cycles (A comparative study)
TL;DR: In this article, four modified ORC cycles with an ejector, a regenerator, and a two-stage evaporator were proposed to improve the thermal efficiency and net power production of the ORC.
Journal ArticleDOI
A review of ejector technology for refrigeration applications
TL;DR: Important connections are made between ejector component and system level studies, an understanding of which would enable improvement of system level performance to the extent where they could be used in some niche applications instead of conventional refrigeration systems.
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.