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Experimental performances of a two-phase R134a ejector
Experimental Thermal and Fluid Science, 2018Abstract This paper presents an experimental study of a liquid–vapour ejector operated under various conditions encountered in refrigeration and other cooling processes with R134a as the working fluid. Ejector performance in terms of entrainment ratio and pressure lift were investigated by imposing the pressure at the inlets and outlet of the ejector
K. Ameur, Z. Aidoun, M. Ouzzane
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Analysis of two-phase ejectors with Fabri choking
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2002A one-dimensional mathematical model was developed using the equations governing the flow and thermodynamics within a jet pump with a mixing region of constant cross-sectional area. The analysis is capable of handling two-phase flows and the resulting flow phenomena such as condensation shocks and the Fabri limit on the secondary mass flowrate.
W E Lear, G M Parker, S A Sherif
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Performance of the two-phase ejector expansion refrigeration cycle
International Journal of Heat and Mass Transfer, 2005Abstract This paper is a continuation of the authors’ previous work. The paper presents new experimental data of the system performance of the two-phase ejector refrigeration cycle (TPERC). The TPERC uses a two-phase ejector as an expansion device while the conventional refrigeration cycle (CRC) uses an expansion valve.
Somchai Wongwises, Somjin Disawas
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Two-phase radial ejector for transcritical CO2 refrigeration
Physics of FluidsTranscritical refrigeration systems using natural refrigerants like CO2 operate on the ejector–expansion cycle to achieve high operating efficiency. The variability of ejector geometry dictates the adjustability of refrigerating capacity in such systems.
Jishnu Chandran Ramachandran +3 more
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Multidimensional Modeling of Condensing Two-Phase Ejector Flow
2011Condensing ejectors utilize the beneficial thermodynamics of condensation to produce an exiting static pressure that can be in excess of either entering static pressure. The phase change process is driven by both turbulent mixing and interphase heat transfer.
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Numerical Investigation of Two-Phase Flow in Natural Gas Ejector
Heat Transfer Engineering, 2013Increasing production and recovery from the mature oil and gas fields often requires a boosting system when the gas pressure is lower than that demanded by the transportation or process system. The supersonic ejector, considered to be a cost-effective way to boost the production of a low-pressure gas well, was introduced into the industrial field ...
Wei-Xiong Chen +4 more
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Modelling and optimization of two-phase ejectors for cooling systems
Applied Thermal Engineering, 2005A one-dimensional compressible flow model, which is based on the control volume approach, has been formulated to model and optimize one and two-phase ejectors in steady-state operation with particular reference to their deployment in a jet cooling system. The working fluid can be both single-component (NH3) and two-component (NH3–H2O).
K. Cizungu, M. Groll, Z.G. Ling
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Advanced exergy analysis of a CO2 two-phase ejector
Applied Thermal Engineering, 2022Lixing Zheng +3 more
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Flow visualization in CO2 two-phase ejector in refrigeration system
Review of Scientific InstrumentsIn transcritical CO2 refrigeration systems, replacing the throttle valve with a two-phase ejector markedly enhances energy recovery during the expansion process. This study comprehensively reviews the application of supersonic flow visualization techniques in two-phase ejectors.
Linan Guan +6 more
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