Results 181 to 190 of about 904 (212)
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Modelling and simulation of steam jet ejectors
Desalination, 1999Abstract The present study describes a computer simulation model for steam jet ejectors. The model was developed by application of the equations of continuity, momentum and energy to individual operation of nozzle, mixing chamber and diffuser. Two different approaches used to develop two models are presented.
Narmine H. Aly +2 more
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A COMPREHENSIVE VALIDATION OF CFD-BASED WET STEAM APPROACH FOR THE MODELLING OF STEAM EJECTORS
Proceeding of 8th Thermal and Fluids Engineering Conference (TFEC), 2023Ejector-based system performance is closely related to the complex fluid-dynamic behavior inside ejectors, which is usually optimized through CFD simulations. The rapid expansion in ejector’s primary nozzle leads to the condensation of the working fluid, and since it strongly affects system performance, it has to be properly accounted.
Rafal Fingas +3 more
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Analysis and Design of a Steam Ejector Structure
2009 International Conference on Energy and Environment Technology, 2009By adjusting structures of the nozzle and mixing-chamber , effects of the structure on the steam ejector performance were analyzed. An improved CFD program which was proved suitable for simulating flow profile in a steam ejector formerly was used here.
Li Haijun +3 more
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Numerical assessment of steam nucleation on thermodynamic performance of steam ejectors
Applied Thermal Engineering, 2013Abstract Steam nucleation is a prevalent phenomenon in supersonic steam flows. It seems to occur to the high-speed flow in steam ejectors. The fundamental approach in evaluating the performance parameters of ejectors is to consider steam as an ideal gas. However, in a supersonic flow of vapor under specific circumstances, nucleation phenomenon occurs
Navid Sharifi +2 more
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Numerical Investigation of the Effects of Steam Nucleation on the Steam Ejectors Performance
Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D, 2012Steam ejectors are widely used in different applications such as propulsion, refrigeration, evacuation and aerospace. The fundamental numerical approach in evaluating the characteristic parameters of steam ejectors was through considering steam as a single-phase gas. But, at some regions in steam ejectors, nucleation of steam is occurred.
Navid Sharifi +2 more
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The Energy-saving Analysis of Steam Ejector in plant Steam System
2010 Asia-Pacific Power and Energy Engineering Conference, 2010This paper introduces the development trend of steam ejector and the impact of plant steam source's operating mode on the economical efficiency of units. On the basis of the working principle of steam ejector, high-pressure steam is used as a media to inhale and compress the low-pressure steam by the steam ejector, which turns the low-pressure steam ...
Yong Li, Ying-ying Wen
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Optimization of Enhanced Steam-Ejector Applied to Steam Jet Refrigeration
Advanced Energy Systems, 1998Abstract Ejectors are used for a wide range of applications. Refrigeration systems have, a long established history. Ejector refrigerators working on steam or halocarbon refrigerants provide a high level of flexibility. Ejector can also be used in solar-powered refrigeration systems and absorption-refrigeration systems ...
D. A. Kouremenos +2 more
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Applied Thermal Engineering, 2004
In order to increase the efficiency of an ejector refrigerator, a better understanding of the flow and the mixing through an ejector is needed. In this study, a 3 kW cooling capacity steam ejector refrigerator was constructed. The static pressure along the ejector axis at various operating conditions was measured and plotted.
Kanjanapon Chunnanond +1 more
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In order to increase the efficiency of an ejector refrigerator, a better understanding of the flow and the mixing through an ejector is needed. In this study, a 3 kW cooling capacity steam ejector refrigerator was constructed. The static pressure along the ejector axis at various operating conditions was measured and plotted.
Kanjanapon Chunnanond +1 more
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Quality indicator of the main group of steam jet ejectors of a steam turbine
Safety and Reliability of Power IndustryThe article presents an analysis of the influence of ejector characteristics and their number on the vacuum in the steam turbine condenser. An analysis of industrial test results for 12 ejector groups of various steam turbine units (STUs) was conducted. Based on this analysis, a new quantity — the ejector group quality indicator
D. Yu. Balakin +4 more
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