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
Mathematical Modelling of the Entrainment Ratio of High Performance Supersonic Industrial Ejectors
TL;DR: In this paper , a mathematical modelling of the entrainment ratio of industrial ejectors is carried out, in which a variation of the diffuser efficiency is also assumed to be a function of the Mach number of the motive gas.
Journal ArticleDOI
A novel approach to improve the performance of solar‐driven Stirling engine using solar‐driven ejector cooling cycle
Journal ArticleDOI
Analytical and Numerical Studies of a Steam Ejector on the Effect of Nozzle Exit Position and Suction Chamber Angle to Fluid Flow and System Performance
A. S. Ramesh,S. Joseph Sekhar +1 more
TL;DR: In this article, a specific value, named as entrainment diameter, is developed and its effect on the performance of the ejector is studied for several combinations of suction chamber angle using numerical method.
Journal ArticleDOI
An improved thermodynamic model for supersonic real-gas ejectors using the compound-choking theory
TL;DR: In this paper , a new state-of-the-art thermodynamic model based on the compound-choking theory is presented, which is able to properly integrate the adequate physics that takes place within the device.
High-Efficiency Joule-Thomson Cryocoolers Incorporating an Ejector
TL;DR: In this article, a JT cooling cycle with an additional ejector is proposed, where the high pressure gas, as the primary fluid of the ejector, is used to compress the low-pressure gas leaving the evaporator, thus reducing the cold end temperature or/and the input power of the compressor.
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
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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.