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
Simulation and Analysis of a Single-Effect Thermal Vapor-Compression Desalination System at Variable Operation Conditions
TL;DR: In this article, a mathematical model is developed to analyze a single-effect thermal vapor compression (TVC) desalination system, and the effects of the variation of operation conditions such as the intake seawater temperature and the mass flow rate of cooling water on the system performance are investigated.
Journal ArticleDOI
A novel ejector with a bypass to enhance the performance
TL;DR: In this article, a novel ejector with a bypass installed in the low pressure district is proposed to enhance the ejector capacity, and the authors show that there is an optimal position for the maximum entrainment ratio, which corresponds to the lowest pressure around the second shock position.
Journal ArticleDOI
Numerical study and design of a two-stage ejector for subzero refrigeration
TL;DR: In this paper, a two-stage ejector-diffuser system was designed for subzero refrigeration applications using R134a as the working fluid, which was operated at 63-74°C generator temperature and −24-°C to 0°C evaporator temperature.
Journal ArticleDOI
The spontaneously condensing phenomena in a steam-jet pump and its influence on the numerical simulation accuracy
TL;DR: In this paper, a wet steam model for transonic flow was proposed to investigate the flow behaviours in a steam-jet pump, and the simulation results demonstrated the existence of spontaneous condensation as the supersonic flow passing through the nozzle.
Journal ArticleDOI
Modelling of ejector chillers with steam and other working fluids
Adriano Milazzo,Andrea Rocchetti +1 more
TL;DR: In this paper, the authors presented an upgraded version of this analysis, supported by experimental data from a prototype chiller using R245fa as working fluid, and extended it to other fluids (water, isobutane, 5 HFCs and 3 HFOs) whose performance is calculated on a wide range of heat source/sink temperatures.
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.