Journal ArticleDOI
Ejectors on the cutting edge: The past, the present and the perspective
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TLDR
In this paper, a critical discussion with an outlook for the future research of ejector technology is proposed, which is grounded on the multi-scale relationship between the local-scale and component-scale performances.About:
This article is published in Energy.The article was published on 2019-03-01. It has received 68 citations till now.read more
Citations
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An updated review of recent advances on modified technologies in transcritical CO2 refrigeration cycle
TL;DR: In this paper, an updated review of the advances on modified technologies to solve the drawbacks of CO2 refrigeration is provided and recent progress on the energy efficiency improvement is summarized, followed by a detailed discussion on different modified technologies as well as their operating fundamental, technical features and performance.
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Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 1: Single-Phase Ejectors
TL;DR: A review of the main developments in ejectors over the last few years can be found in this article, where the main findings and trends in the area of heat-driven ejectors and ejector-based machines using low boiling point working fluids are summarized.
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Progress in ejector-expansion vapor compression refrigeration and heat pump systems
TL;DR: The use of an expansion energy recovery ejector has been given great concern owing to virtues of no moving elements, cost-effectiveness, high reliability, and comparable efficiency as mentioned in this paper.
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Optimization of the primary nozzle based on a modified condensation model in a steam ejector
TL;DR: In this paper, a modified condensation model is presented to evaluate the steam ejector performance and to optimize the ejector geometry, which is more appropriate than the other three models.
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Design and investigation of multi-nozzle ejector for PEMFC hydrogen recirculation
TL;DR: In this article, a multi-nozzle ejector was proposed for hydrogen recirculation in proton exchange membrane fuel cell (PEMFC) systems, which can achieve a wide output power range without a significant change in the primary pressure by simply switching the operating mode of the nozzles.
References
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Journal ArticleDOI
Ejector refrigeration: A comprehensive review
TL;DR: In this paper, a comprehensive literature review on ejector refrigeration systems and working fluids is presented, which deeply analyzes ejector technology and behavior, refrigerant properties and their influence over ejector performance.
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Experimental validation of a prototype ejector designed to reduce throttling losses encountered in transcritical R744 system operation
Stefan Elbel,Pega Hrnjak +1 more
TL;DR: Experiments confirmed that like in a conventional transcritical R744 system with expansion valve, the high-side pressure control integrated into the ejector could be used to maximize the system performance.
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Multidimensional Modeling of Condensing Two-Phase Ejector Flow
TL;DR: In this paper, the authors describe the construction of a multidimensional simulation capability built around an Eulerian pseudo-fluid approach, where the fluid is treated as being in a non-thermodynamic equilibrium state, and a modified form of the homogenous relaxation model (HRM) is employed.
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CFD-based shape optimisation of a CO2 two-phase ejector mixing section
Michal Palacz,Jacek Smolka,Waclaw Kus,Adam Fic,Zbigniew Buliński,Andrzej J. Nowak,Krzysztof Banasiak,Armin Hafner +7 more
TL;DR: In this paper, the geometry of a CO2 ejector mixing section was optimized using genetic algorithm (GA) and an evolutionary algorithm (EA) with a validated CFD model based on the homogeneous equilibrium model (HEM).
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CFD simulation on the boundary layer separation in the steam ejector and its influence on the pumping performance
TL;DR: In this article, the boundary layer separation inside the ejector was studied by using CFD method and a steam ejector refrigeration experimental system was set up to verify the numerical model.