Results 171 to 180 of about 822 (213)
Planimetric quantification of plaque in patients with multibracket appliances using an intraoral scanner - proof-of-concept. [PDF]
Clin Oral InvestigJung K +3 more
europepmc +1 more source
ESC Heart Failure, Volume 12, Issue 2, Page 1514-1522, April 2025.
Takamasa Iwai +4 more
wiley +1 more source
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Numerical investigation of a two-phase CO2 ejector
International Journal of Refrigeration, 2014Using an ejector as an additional component in a vapor compression refrigeration system is a promising way to increase the system efficiency. The efficiency increase of the refrigeration system depends strongly on the ejector. Using CFD simulations, it is possible to obtain a better understanding of two-phase CO2 ejectors in order to design more ...
Jürgen Kohler
exaly +2 more sources
An investigation on the component efficiencies of a small two-phase ejector
International Journal of Refrigeration, 2016Abstract This paper presents an investigation on the component efficiencies of a small two-phase ejector. The experiments are firstly carried out to test the operation characteristics of a small two-phase ejector working with R600a. Combining the measured experimental data with an ejector model, a calculation method for the component efficiencies of ...
Jianlin Yu
exaly +2 more sources
Energy Conversion and Management, 2016
Abstract This paper presents an experimental investigation on two-phase driven ejector performance characteristics in a novel ejector enhanced refrigeration system (NERC). An experimental setup using refrigerant R600a is designed and built based on the NERC system. In the experimental setup, the ejector uses two-phase refrigerant coming from the high-
Jianlin Yu
exaly +2 more sources
Abstract This paper presents an experimental investigation on two-phase driven ejector performance characteristics in a novel ejector enhanced refrigeration system (NERC). An experimental setup using refrigerant R600a is designed and built based on the NERC system. In the experimental setup, the ejector uses two-phase refrigerant coming from the high-
Jianlin Yu
exaly +2 more sources
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
exaly +2 more sources
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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World's First High Efficiency Refrigeration Cycle with Two-Phase Ejector: “EJECTOR CYCLE”
SAE Technical Paper Series, 2004<div class="htmlview paragraph">Regarding the prevention of global warming and ozone layer depletion to protect the global environment, energy conservation and disuse of CFCs are among the recent industrial requirements. An ejector cycle can save power by eliminating expansion energy loss in the conventional vapor compression refrigeration cycle,
Hirotsugu Takeuchi +2 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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