Relevant bibliographies by topics / Liquid-steam ejector

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Liquid-steam ejector'

Author: Grafiati
Published: 28 May 2022
Last updated: 30 July 2025

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Journal articles on the topic "Liquid-steam ejector"

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Sharapov, Serhii, Sviatoslav Yevtushenko, Vitalii Panchenko, Viktor Kozin, and Oleksandr Ivchenko. "Improving the efficiency of condensation installations of steam turbines by applying liquid-vapor ejector." Eastern-European Journal of Enterprise Technologies 4, no. 8 (118) (2022): 44–51. http://dx.doi.org/10.15587/1729-4061.2022.263331.

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This paper considers the possibility of using liquid-vapor ejectors in condensing units of steam turbines. This unit is designed for pumping out a steam-air mixture from a steam turbine condenser, in which the process occurs at a pressure lower than atmospheric. In the traditional scheme, this is provided by a two-stage steam-jet ejector unit. The proposed scheme involves the use of a single-stage liquid-vapor ejector and its possible pre-vacuum mode of operation in conjunction with a liquid-ring vacuum pump. A working process of the liquid-vapor ejector does not require the supply of working
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Serhii, Sharapov, Yevtushenko Sviatoslav, Panchenko Vitalii, Kozin Viktor, and Ivchenko Oleksandr. "Improving the efficiency of condensation installations of steam turbines by applying liquid-vapor ejector." Eastern-European Journal of Enterprise Technologies 4, no. 8 (118) (2022): 44–51. https://doi.org/10.15587/1729-4061.2022.263331.

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This paper considers the possibility of using liquid-vapor ejectors in condensing units of steam turbines. This unit is designed for pumping out a steam-air mixture from a steam turbine condenser, in which the process occurs at a pressure lower than atmospheric. In the traditional scheme, this is provided by a two-stage steam-jet ejector unit. The proposed scheme involves the use of a single-stage liquid-vapor ejector and its possible pre-vacuum mode of operation in conjunction with a liquid-ring vacuum pump. A working process of the liquid-vapor ejector does not require the supply of working
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Lei, Yu, Shengyu Li, Jun Lu, Ye Xu, Yong Yong, and Dingding Xing. "Numerical Analysis of Steam Ejector Performance with Non-Equilibrium Condensation for Refrigeration Applications." Buildings 13, no. 7 (2023): 1672. http://dx.doi.org/10.3390/buildings13071672.

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In recent years, there has been great interest in developing cooling systems with humidity- and temperature-independent control capabilities that can operate efficiently at varying temperatures. This paper proposes a bi-loop double-evaporator ejection–compression cycle, which utilizes low-grade heat and is suitable for the construction industry. The proposed cycle involves the concurrent operation of a vapor compression cycle and an ejector refrigeration cycle that enables it to handle altered pressure levels and operate with varying compression ratios all the way to a common condenser pressur
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Al-Dabbas, Mohammad Awwad Ali. "The Availability of Hybrid Nano Adsorption-Multi Stage Ejector Cooling Cycle with a Different Type of Steam Generator." Mathematical Modelling of Engineering Problems 8, no. 5 (2021): 826–36. http://dx.doi.org/10.18280/mmep.080520.

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Ejectors are a kind of pump that does not have any moving components. In certain cases, the motor fluid may be a liquid, steam, or another gas. The research focuses on using nano adsorption combined with a multi ejector to fuel a sophisticated nano adsorption power plant, which is equipped with three shapes of steam boiler generators. The simulation was accomplished by implementing it with the cooperation of the two programs MATLAB A and MATLAB B, together with a solid flow. To raise the temperature of the working fluid before it enters the generator, a jet pump is positioned before the genera
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Li, Yuen, Chen, et al. "Computational Study of Wet Steam Flow to Optimize Steam Ejector Efficiency for Potential Fire Suppression Application." Applied Sciences 9, no. 7 (2019): 1486. http://dx.doi.org/10.3390/app9071486.

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The steam ejector is a core component of an ejector-based refrigeration system. Additionally, steam ejectors can also be potentially applied for a fire suppression system by using pressurized steam droplets to rapidly quench and extinguish the fire. The use of steam will significantly reduce the amount of water consumption and pipe flow rate compared to conventional sprinklers. However, the efficiency of the steam ejector nozzle is one of major factors that can influence the extinguishing mechanisms and the performance of pressurized steam for fire suppression. In this article, to formulate an
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Charton, Hugues, Christian Perret, and Hai Trieu Phan. "Analysis of Supersonic Flows inside a Steam Ejector with Liquid–Vapor Phase Change Using CFD Simulations." Thermo 4, no. 1 (2024): 1–15. http://dx.doi.org/10.3390/thermo4010001.

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In this work, different CFD models to compute flows inside a steam ejector were investigated. The results were compared to the analytical models as well as the experimental results from the literature. All the simulations gave realistic results from the hydrodynamic perspective with a relative error of the entrainment ratio between 25% and 40% compared to reference experimental data. However, an analysis of the temperature profiles showed that only realistic results from the thermodynamic perspective were given by multiphase calculations. The first multiphase model tested was the so-called Wet
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Revki, Romadhon, and Sinaga Nazaruddin. "Study of Liquid Ring Vacuum Pump's Capacity to Reduce Motive Steam Consumption of Gas Removal System in Indonesia's Geothermal Power Plant 117 MW." International Journal of Innovative Science and Research Technology 8, no. 4 (2023): 1191–200. https://doi.org/10.5281/zenodo.7889059.

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Gas Removal System (GRS) is vital in geothermal power plants since steam flows into the turbine and the condenser still has a certain amount of Non-Condensable Gas (NCG). The effect of the NCG will increase the pressure in the condenser so that it will affect the power generation performance of the Geothermal Power Plant (GPP). The types of equipment used in GRS are steam jet ejectors dan Liquid Ring Vacuum Pumps (LRVP). The existing configuration of GRS in this GPP uses a hybrid system for Train A and Train B, which consists of 2 stages for steam ejector and 1 stage for LRVP. This study aims
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Kuś, Tomasz, and Paweł Madejski. "Numerical Investigation of a Two-Phase Ejector Operation Taking into Account Steam Condensation with the Presence of CO2." Energies 17, no. 9 (2024): 2236. http://dx.doi.org/10.3390/en17092236.

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The application of a two-phase ejector allows for the mixing of liquid and gas and provides effective heat transfer between phases. The aim of the study is a numerical investigation of the performance of a water-driven, condensing two-phase ejector. The research was performed using CFD methods, which can provide an opportunity to analyze this complex phenomenon in 2D or 3D. The 2D axisymmetric model was developed using CFD software Siemens StarCCM+ 2022.1.1. The Reynolds-Averaged Navier–Stokes (RANS) approach with the Realisable k-ε turbulence model was applied. The multiphase flow was calcula
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Freedman, B. Z., and N. Lior. "A Novel High-Temperature Ejector-Topping Power Cycle." Journal of Engineering for Gas Turbines and Power 116, no. 1 (1994): 1–7. http://dx.doi.org/10.1115/1.2906793.

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A novel, patented topping power cycle is described that takes its energy from a very high-temperature heat source and in which the temperature of the heat sink is still high enough to operate another, conventional power cycle. The top temperature heat source is used to evaporate a low saturation pressure liquid, which serves as the driving fluid for compressing the secondary fluid in an ejector. Due to the inherently simple construction of ejectors, they are well suited for operation at temperatures higher than those that can be used with gas turbines. The gases exiting from the ejector transf
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Han, Yu, Xiaodong Wang, Wei Wang, Yuan Xien Lee, and Ao Li. "Numerical Investigation of Transonic Flow-Induced Spontaneous Condensation in Micro-Ejector Nozzles." Micromachines 14, no. 6 (2023): 1260. http://dx.doi.org/10.3390/mi14061260.

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Micro-cooling systems are compact refrigeration systems widely applicable in microchemical analysis, biomedicine, and microelectromechanical systems (MEMS). These systems rely on the use of micro-ejectors to achieve precise, fast, and reliable flow and temperature control. However, the efficiency of micro-cooling systems is hindered by spontaneous condensation occurring downstream of the nozzle throat and within the nozzle itself, impacting the performance of the micro-ejector. A micro-scale ejector mathematical model describing wet steam flow was simulated to investigate the steam condensatio
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Dissertations / Theses on the topic "Liquid-steam ejector"

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Снісаренко, Д. О. "Дослідження теплонасосної установки системи опалення на базі рідинно-парового ежектора з робочим середовищем R718". Master's thesis, Сумський державний університет, 2021. https://essuir.sumdu.edu.ua/handle/123456789/86613.

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У роботі виконано розрахунок теплового навантаження приміщення та визначено величину тепловтрат в залежності від температури навколишнього середовища. Виконано термодинамічний, ексергетичний та термоекономічний розрахунок теплонасосної установки для потреб опалення з робочим середовищем R718 на базі рідинно-парового ежектора в складі вакуумного агрегату та виконано порівняльний аналіз з традиційними теплонасосними установками з робочими середовищами R142b, R245fa та R410a. В результаті цього визначено доцільність впровадження нової установки. У розділі охорони праці виконано аналіз шкідливих т
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Conference papers on the topic "Liquid-steam ejector"

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Das, Saurish, Suranjan Sarkar, Gary H. Lee, and Ong Junxiong. "Prediction of Flow-Accelerated Corrosion/Erosion in High-Speed Ejectors Using a CFD Model." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93668.

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Abstract In high-velocity ejector systems containing liquid droplets, ejector walls are sometimes damaged by flow-accelerated corrosion/erosion. Velocity, droplet size, impact angle etc. are the most important parameters affecting flow-accelerated (FA) corrosion/erosion. In our plant operation, we had experienced FA corrosion/erosion and consequent failure even with very low impact angle. To understand the leak/ failure, we have adopted the Euler-Euler multiphase model-based CFD approach. In the Euler-Euler multiphase model, the liquid droplets are modelled as dispersed phase while the gas-ste
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Wang, Jiangfeng, Yiping Dai, Zhixin Sun, and Shaolin Ma. "Parametric Analysis of a New CCHP System Utilizing Liquefied Natural Gas (LNG)." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22319.

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Liquefied natural gas (LNG) contains considerable cold energy because a significant amount of energy is consumed to produce low-temperature LNG. So, finding a good way to utilize the LNG effectively, particularly its cold energy, is an important issue to solve the problem of energy crisis. In the present study, a new CCHP system utilizing liquid natural gas is proposed to provide cooling, heat and electricity output simultaneously to meet user’s different energy requirements. This CCHP system consists of a gas/steam combined cycle and an ejector refrigeration cycle. For cold energy utilization
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Zapka, W., and A. C. Tam. "Scientific understanding and applications of laser cleaning." In OSA Annual Meeting. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.tubb.2.

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Particulate contamination is a major yield loss factor in the manufacturing of microelectronic, data-storage, and other hi-tech devices. A single particle as small as 0.1 μm in size can cause complete micro-electronic circuit failure, or seriously degrade read/write performance of magnetic storage devices or even result in a crash of the magnetic head. Standard cleaning techniques, typically performed in liquid baths, have two major drawbacks: first, there is limited cleaning efficiency for submicron particles, and secondly, liquid baths tend to redeposit or even add new particles to the subme
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Pellegrini, Marco, Giulia Agostinelli, Hidetoshi Okada, and Masanori Naitoh. "Eulerian Two-Phase Flow Modeling of Steam Direct Contact Condensation for the Fukushima Accident Investigation." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30937.

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Steam condensation is characterized by a relatively large interfacial region between gas and liquid which, in computational fluid dynamic (CFD) analyses, allows the creation of a discretized domain whose average cell size is larger than the interface itself. For this reason generally one fluid model with interface tracking (e.g. volume of fluid method, VOF) is employed for its solution in CFD, since the solution of the interface requires a reasonable amount of cells, reducing the modeling efforts. However, for some particular condensation applications, requiring the computation of long transie
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Pellegrini, Marco, Giulia Agostinelli, Hidetoshi Okada, and Masanori Naitoh. "Eulerian Two-Phase Flow Modeling of Steam Direct Contact Condensation for the Fukushima Accident Investigation." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21766.

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Steam condensation is characterized by a relatively large interfacial region between gas and liquid which, in computational fluid dynamic (CFD) analyses, allows the creation of a discretized domain whose average cell size is larger than the interface itself. For this reason generally one fluid model with interface tracking (e.g. volume of fluid method, VOF) is employed for its solution in CFD, since the solution of the interface requires a reasonable amount of cells, reducing the modeling efforts. However, for some particular condensation applications, requiring the computation of long transie
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Rahman, Mohammad A., Johana Gomez, Ted Heidrick, Brian A. Fleck, and Jennifer McMillan. "Correlations of the Droplet Size-Velocity of the Two-Phase, Air/Liquid Spray Using a Particle-Dynamic-Analyzer." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55330.

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In the heavy oil process industry preheated bitumen and steam are mixed upstream of the feed nozzle and subsequently injected into fluid bed coker reactors via feed nozzles. To achieve high liquid product yields, the bitumen should contact a large number of fluidized coke particles quickly and uniformly. One of the drawbacks of the spray issuing from the nozzle is the potential pulsation within the spray and in the feeding conduit, which is highly undesirable to yield high productivity. These pulsations result in poor atomization and in most instances, a slug of liquid is ejected out of the no
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Singer, Cs, R. Buck, R. Pitz-Paal, and H. Müller-Steinhagen. "Economic Chances and Technical Risks of the Internal Direct Absorption Receiver (IDAR)." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91095.

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Increased receiver temperatures of solar tower power plants are proposed to decrease the plants levelized electricity costs (LEC) due to the utilization of supercritical steam power plants and thus higher overall plant efficiency. Related to elevated receiver temperatures preliminary concept studies show a distinct LEC reduction potential of the internal direct absorption receiver (IDAR), if it is compared to liquid in tube (LIT) or beam down (BD) receiver types. The IDAR is characterized by a downwards oriented aperture of a cylindrical cavity, whose internal lateral area is illuminated from
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