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
Energy and exergy analyses of a solar-driven ejector-cascade heat pump cycle
TL;DR: In this article, a solar-driven ejector-cascade heat pump cycle is proposed to improve the performance of an air-source heat pump under low ambient temperature, in which an ejector sub-cycle takes R134a, R1234yf or R141b as working fluid and a vapor compression sub-cycler uses R12 34yf as a refrigerant.
Journal ArticleDOI
Comparison of a fuel-driven and steam-driven ejector in solid oxide fuel cell systems with anode off-gas recirculation: Part-load behavior
TL;DR: In this paper, the authors investigated the use of ejectors for recirculating anode off-gas in an SOFC system, focusing on the part-load capability of two different systems.
Journal ArticleDOI
New methods for analyzing transport phenomena in supersonic ejectors
TL;DR: In this article, the authors proposed two different and complementary approaches to quantitatively investigate transfers between the primary and the secondary streams all along the ejector and identify the location of exergy losses and their origins.
Journal ArticleDOI
Performance analysis and optimization of an ejector refrigeration system using alternative working fluids under critical and subcritical operation modes
Aggrey Mwesigye,Seth B. Dworkin +1 more
TL;DR: In this article, an improved model to predict the performance of an ejector refrigeration system under both the critical and subcritical modes of operation was developed and validated, and the model predicts ejector performance more precisely compared to studies following the same modeling approach in the literature.
Journal ArticleDOI
Performance analysis of an absorption power cycle for ocean thermal energy conversion
Han Yuan,Ning Mei,Peilin Zhou +2 more
TL;DR: In this article, an absorption power cycle with two ejectors is proposed for ocean thermal energy conversion, where the ejectors are driven by vapor and solution from the sub-generator.
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.