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
Numerical study on the performances of steam-jet vacuum pump at different operating conditions
Xiaodong Wang,Jingliang Dong +1 more
TL;DR: In this article, a mathematic model based on realizable k-ɛ turbulence model for transonic flow was proposed to investigate the mixing flow behaviors of primary and secondary fluids in steam-jet vacuum pump and the affections to the pumping performances.
Journal ArticleDOI
Ejector primary nozzle steam condensation: Area ratio effects and mixing layer development
TL;DR: In this article, a numerical investigation of flow in the primary nozzle of a steam ejector is presented to further explore the differences between ideal gas and wet steam analysis of ejector flows.
Journal ArticleDOI
The numerical analysis of the effect of geometrical factors on natural gas ejector performance
TL;DR: In this article, two main ejector geometrical factors, the primary nozzle exitposition (NXP) and the mixing tube length to diameter ratio (R), are investigated based on the CFDtechnique.
Journal ArticleDOI
Recent development in ejector technology—a review
TL;DR: A review of the main studies carried out on ejectors and their applications during the period of 1995 to the present can be found in this article, where the use of water, halocarbon compounds and working pairs such as LiBr-H2O are reviewed.
Journal ArticleDOI
A critical review linking ejector flow phenomena with component- and system-level performance
TL;DR: Important connections are made between ejector component- and system-level studies that would together lead to improved overall system performance, and improved computational modeling of shock phenomena and the effects of two-phase flow in ejectors are made.
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.