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 Modelling of Supersonic Gas Ejector with Droplets
TL;DR: A thermodynamic model for determining the entrainment ratio and double choke limiting pressure of supersonic ejectors within the context of heat driven refrigeration cycles, with and without droplet injection, at the constant area section of the device is presented.
Journal ArticleDOI
Parametric study and optimization of a novel geothermal-driven combined cooling, heating, and power (CCHP) system
TL;DR: In this paper , a combined cooling, heating, and power (CCHP) cogeneration system grounded on geothermal (GTh) energy heat recovery is introduced, which comprises three subsystems, namely, the Kalina cycle (KC), ejector refrigeration cycle (ERC), and organic Rankine cycle (ORC).
Journal ArticleDOI
Investigation on a two-stage ejection refrigeration system
TL;DR: In this article, a two-stage ejection refrigeration system is presented in order to effectively utilize low-grade heat in this context, and the experimental results show that the presented system can operate normally under a condensing temperature of 54°C, which is higher than the normal condensing temperatures of a single-stage EH system.
Journal ArticleDOI
Exergoeconomic assessment of the ejector-based battery thermal management system for electric and hybrid-electric vehicles
TL;DR: In this article , the authors compared the performance of the ejector-based battery thermal management system (BTMS) and the basic BTMS from thermal and exergoeconomic perspectives.
One-Dimensional Model of an Optimal Ejector and Parametric Study of Ejector Efficiency
TL;DR: The J. William Fulbright Foreign Scholarship Board (Science and Technology PhD Program) as mentioned in this paper was established by the United States Department of State and the United Nations Educational, Scientific and Cultural Council (UNESCO).
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.
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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.