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
Prospect Evaluation of Low-GWP Refrigerants R1233zd(E) and R1336mzz(Z) Used in Solar-Driven Ejector-Vapor Compression Hybrid Refrigeration System
TL;DR: In this paper, a solar-driven ejector-vapor compression hybrid refrigeration system with R1233zd(E) and R1336mzz(Z) as the working fluids was theoretically evaluated.
Journal ArticleDOI
Off-design performance analysis of a power-cooling cogeneration system combining a Kalina cycle with an ejector refrigeration cycle
Yang Du,Yiping Dai +1 more
TL;DR: In this paper, an off-design performance analysis of a power-cooling cogeneration system combining a Kalina cycle and an ejector refrigeration cycle for low-grade hot water is conducted.
Journal ArticleDOI
A Numerical Study on the Supersonic Steam Ejector Use in Steam Turbine System
TL;DR: In this paper, the Computational Fluids Dynamics (CFD) method was employed to simulate a supersonic steam ejector, SST k-w turbulence model was adopted, and both real gas model and ideal gas model for fluid property were considered and compared.
Journal ArticleDOI
Subcooling control method for the adjustable ejector in the direct expansion solar assisted ejector-compression heat pump water heater
TL;DR: In this article, a subcooling control method is proposed to regulate the adjustable ejector in the presented direct expansion solar assisted ejector-compression heat pump water heater, which adopts the PID (Proportion Integration Differentiation) algorithm and aims to help the presented system track the given sub-cooling degree through automatically adjusting the nozzle throat area.
Journal ArticleDOI
Mixing process of two streams within a steam ejector from the perspectives of mass, momentum and energy transfer
TL;DR: In this paper, a novel ejector model with species transport is proposed that can clearly elucidate how, when, where and to what extent the two streams mix inside the steam ejector.
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.