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Journal articles on the topic 'Liquid-steam ejector'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

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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2

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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3

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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4

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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5

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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6

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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9

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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10

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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11

Yang, Bin, Xiaojing Ma, Hailun Zhang, Wenxu Sun, Lei Jia, and Haoyuan Xue. "Effect of Superheat Steam on Ejector in Distilled Water Preparation System for Medical Injection." Entropy 24, no. 7 (2022): 960. http://dx.doi.org/10.3390/e24070960.

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In this study, a wet steam model was used to investigate the effect of steam superheat on ejector performance and non-equilibrium condensation phenomena. The simulation data for the ejector were validated with experimental data. The simulations show that an increase in primary flow superheat will increase the entrainment ratio, while an increase in secondary flow superheat will decrease the entrainment ratio. The output fluid superheat has little effect on the entrainment ratio. As the primary flow superheat increases from 0 to 20 K, the starting position of non-equilibrium condensation moves

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Stanković, Branko. "Modified Steam-Turbine Rankine Cycle without Rejection of the Cycle Condensation Heat, Driven by a Wet-Vapor-Region Thermocompressor." Energija, ekonomija, ekologija XXVI, no. 2 (2024): 71–78. http://dx.doi.org/10.46793/eee24-2.71s.

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The disclosed concept relates to a novel modified and simplified steam-turbine Rankine cycle without rejection of the cycle waste heat of condensation, which is driven by a thermocompressor (ejector) operating in the wet-vapor region. The thus modified steam-turbine Rankine cycle can theoretically achieve the maximum possible thermal efficiency (~100%). The wet-vapor mixture circulating within the thermocompressor is being separated in a dedicated cylindrical separation tank, so that the saturated water is pumped to a water heater where it receives the cycle heat input, while the saturated vap

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13

Jiang, Jian, and Yanping Yin. "Effect of generator temperature on steam ejector performance in renewable refrigeration cycle considering wet steam model and dry steam model." International Journal of Renewable Energy Development 13, no. 3 (2024): 386–95. http://dx.doi.org/10.61435/ijred.2024.59394.

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The rise in global warming has led to an increased utilization of cooling systems. High energy consumption associated with common refrigeration cycles not only contributes to air pollution but also intensifies the consumption of fossil fuels. Consequently, the imperative to conserve energy has become paramount in today's world. One of the methods to decrease energy consumption involves employing systems capable of harnessing waste heat from industries, solar energy, and other sources. The ejector refrigeration cycle (ERC) stands as an example of such systems. In present study, the impact of el

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14

Serhii, Sharapov, Husiev Danylo, Panchenko Vitalii, Kozin Viktor, and Baha Vadym. "Analysis of the possibility of using R718 for a heat pump of a heating system based on a liquid-vapor ejector." Eastern-European Journal of Enterprise Technologies 6, no. 8 (108) (2020): 39–44. https://doi.org/10.15587/1729-4061.2020.217274.

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The study explores the possibility of using water (R718) as a refrigerant for a heat pump installation of a heating system. This unit is a vapor compression heat pump with a regenerative heat exchanger in which the vacuum unit based on a liquid-vapor ejector is used instead of a scroll refrigeration compressor. The working process of such an apparatus is based on implementing a fundamentally new cycle that does not require the supply of working steam from the outside. Instead, steam is generated inside the vacuum unit. The article describes the proposed installation and its differences from th

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15

Коршак, Алексей Анатольевич, and Владимир Викторович Пшенин. "Determination of parameters of non-pump ejector gasoline vapor recovery unit." SCIENCE & TECHNOLOGIES OIL AND OIL PRODUCTS PIPELINE TRANSPORTATION, no. 1 (March 20, 2023): 25–31. http://dx.doi.org/10.28999/2541-9595-2023-13-1-25-31.

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Потери нефти и нефтепродуктов от испарения, сопровождающиеся выбросами в атмосферу предельных углеводородов метанового ряда (этана, пропана, бутанов и пентанов), наносят не только материальный, но и экологический ущерб. В частности, он связан с образованием тропосферного озона – парникового газа, являющегося результатом химических реакций с участием предельных углеводородов. В этой связи актуальны все мероприятия по ограничению выбросов паров легких углеводородов в атмосферу. Одним из эффективных технических средств для решения задачи сокращения потерь от испарения являются установки рекуперац

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16

Sadik, Almahdi Sadik Omar. "Proposal for Palm Oil Mill Effluent (POME) Treatment at Source to reclaim water." American Based Research Journal 8, no. 5 (2019): 22–28. https://doi.org/10.5281/zenodo.3456917.

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<em>Malaysia is the largest producer and exporter of palm oil. The serious problems in the palm fruit processing are the managing of the wastewater generated during the processes. The wastes consist of a significant amount of solid wastes and a wastewater called palm oil mill effluent (POME). POME is a thick brownish liquid that contains high amount of total solids (40,500 mg/L), oil and grease (4000 mg/L), This highly polluting effluent is becoming a major problem to environment as if it not being treated well before discharged based on standard limit imposed by The Malaysian Department of En

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17

Nikitin, Dmitry, Yuri Rodionov, Grigory Rybin, Nikolai Voronin, Anastasia Skomorokhova, and Anna Sukhova. "CAVITATION DAMAGES IN LIQUID RING VACUUM PUMPS." SCIENCE IN THE CENTRAL RUSSIA, no. 4 (August 22, 2022): 131–39. http://dx.doi.org/10.35887/2305-2538-2022-4-131-139.

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The relevance of studying the parameters of operation of liquid ring vacuum pumps and the development of new designs is due to their demand in the agro-industrial complex. The paper provides a description of the cavitation phenomena that occur during the operation of a liquid ring vacuum pump. Cavitation degrades pump performance and can often cause failure. It can occur due to: low barometric pressure; large vacuum suction height; high temperature of the pumped liquid; additional pressure loss in the pump impeller. To identify the possibility of cavitation in a liquid ring vacuum pump, a cavi

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18

Osipov, Eduard, Eduard Telyakov, Sergey Ponikarov, Daniel Bugembe, and Artem Ponikarov. "Mini-Refinery Vacuum Unit: Functional Analysis and Improvement of Vacuum Overhead System." Processes 9, no. 11 (2021): 1865. http://dx.doi.org/10.3390/pr9111865.

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The purpose of this study was to analyze the functioning of the vacuum distillation unit of a mini-refinery and to develop recommendations for improving the vacuum overhead system with the aim to reduce the cost of creating and maintaining a vacuum in the fuel oil separation column. A calculation model of the vacuum unit was developed in the Unisim Design R451 software package, which was identified by comparing the calculated data with the data from an industrial study for two operating modes of the installation. Replacing the existing steam-ejector pump with a liquid-ring vacuum pump was prop

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19

Chekh, O., S. Sharapov, and V. Arsenyev. "Adiabated flowing streams in nozzles: influence of regular characteristics on relaxation steam formation." Refrigeration Engineering and Technology 55, no. 1 (2019): 10–14. http://dx.doi.org/10.15673/ret.v55i1.1347.

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Two-phase nozzles, in which the phase transition process takes place, can work in jet superchargers for various purposes, including jet thermal pumps (steam-water injectors) and thermal compressors. In such schemes of thermal transformers, the ejector performs the function of a preliminary compression stage in order to reduce the load on the compression of the working substance in the main compressor. The use of fluxes of boiling liquid as energy-efficient working fluids is inhibited due to the lack of a reliable description of the mechanism of their flow. Finding the dependence of the steam c

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20

Babichenko, Anatoliy, Igor Krasnikov, Juliya Babichenko, Volodymyr Panasenko, Dmytro Snurnikov, and Oleksii Shutynskyi. "Designing energy-efficient hardware and technological structure of absorption refrigeration units for ammonia production." Eastern-European Journal of Enterprise Technologies 1, no. 2 (127) (2024): 74–81. http://dx.doi.org/10.15587/1729-4061.2024.297717.

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The object of research is the equipment and technological design of absorption refrigeration units (ARUs) for the technological system of secondary condensation of large-scale ammonia production. Improving the energy efficiency of ARU is an urgent problem in the general process of reducing operating costs for natural gas in these industries as a whole. Based on the results of analytical studies, the feasibility of combining absorption-refrigeration and vapor-ejector cycles was substantiated, which ensures a decrease in the boiling temperature of a weak water-ammonia solution in the cube of the

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21

Шевцов, А. А., Н. А. Сердюкова, В. В. Ткач, Д. В. Лиховая, and К. В. Орешин. "MANAGEMENT OF BIODIESEL PRODUCTION TECHNOLOGY UNDER SUPERCRITICAL CONDITIONS." Южно-Сибирский научный вестник, no. 2(42) (April 30, 2022): 53–59. http://dx.doi.org/10.25699/sssb.2022.42.2.003.

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Химические технологии в сверхкритических состояниях (с использованием сверхкритических флюидов) находят все большее применение и позволяют полностью отказаться от катализаторов, изменяющих скорость химических реакций, и обеспечить аномально высокую растворяющую способность вступающих в реакцию веществ. Переэтерификация растительных масел при получении эфиров жирных кислот без применения катализатора осуществляется при значениях температуры и давления, превышающих критические параметры реагирующих жидкостей, обладающих одновременно свойствами газа и жидкости со значительно низкой вязкостью, выс

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22

Fu, Benshuai, Bingju Lu, Haiyan Xiao, Liping Qin, and Guanghua Li. "Experimental research on the atomization of transverse liquid jet." Journal of Physics: Conference Series 2764, no. 1 (2024): 012049. http://dx.doi.org/10.1088/1742-6596/2764/1/012049.

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Abstract The transverse liquid jet is widely used in gas-steam ejection, scramjet engines, and other engineering applications. The research of transverse liquid jets can provide a basis for product design and has a wide range of engineering application value. A high-temperature and high-pressure jet experimental system was designed according to the characteristics of the cooling water jet atomization in the gas-steam ejection power system. The high-speed photography method was used to obtain the macroscopic structural characteristics of the transverse liquid jet. In this paper, experimental re

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Greenbank, Emma, Mark J. McGuinness, and C. Ian Schipper. "A theoretical model of Surtseyan bomb fragmentation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 477, no. 2253 (2021): 20210166. http://dx.doi.org/10.1098/rspa.2021.0166.

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Surtseyan eruptions are an important class of mostly basaltic volcanic eruptions first identified in the 1960s, where erupting magma at an air–water interface interacts with large quantities of slurry, a mixture of previously ejected tephra that re-enters the crater together with water. During a Surtseyan eruption, hot magma bombs are ejected that initially contain pockets of slurry. Despite the formation of steam and anticipated subsequent high pressures inside these bombs, many survive to land without exploding. We seek to explain this by building and solving a simplified spherical mathemati

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24

Grzesiak, Szymon, and Andrzej Adamkiewicz. "Application of Steam Jet Injector for Latent Heat Recovery of Marine Steam Turbine Propulsion Plant." New Trends in Production Engineering 1, no. 1 (2018): 235–44. http://dx.doi.org/10.2478/ntpe-2018-0030.

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Abstract This paper presents the results of previously carried out analyses regarding efficiency and criteria evaluation of various propulsion plants of modern LNG (Liquid Natural Gas) carriers. The results of previous identification and quality assessment of waste heat energy sources of a CST (Conventional Steam Turbine) plant are presente. In this paper the possibility of use a steam jet injector in order to recover the latent heat is analysed. Calculations were carried out for an injector equipped with a de Laval nozzle, determining the thermodynamic state parameters of the mixture of drive

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Fujita, Isamu, Muneo Yoshie, and Yukihiro Saito. "Steam Jet Pump For Oil Recovery And Reformation." International Oil Spill Conference Proceedings 2005, no. 1 (2005): 589–93. http://dx.doi.org/10.7901/2169-3358-2005-1-589.

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ABSTRACT This paper discusses basic performances of the steam jet suction device and its potential application to the spilled oil recovery. The experiments were carried out on suction and ejection performance of the steam-driven jet pump as well as its other benefits such as breaking emulsion or an application to a beach cleaning device. The paper additionally includes some basic topics related to the process of emulsion breaking by surface active agents. The main conclusions of the study are (1) A steam-jet pump is basically suitable to recover and transfer high viscosity spilled oil because

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26

SAVYTSKYI, YURYI. "SIMULATION OF THE PROCESS OF FILLING POLYSTYRENE FOAM FOUNDRY MOLD WITH THE METAL." Herald of Khmelnytskyi National University. Technical sciences 319, no. 2 (2023): 263–67. http://dx.doi.org/10.31891/2307-5732-2023-319-1-263-267.

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Modern approaches to prefabrication production consist in the maximum approximation of the shape and size of the blanks to the finished part, which essentially makes the final part cheaper. One of the methods of precision casting is casting in gasified models, or foam models. The basis is the task of developing a theoretical model of filling a polystyrene foam model with liquid metal. The analysis of the process of filling the mold with a gasified model and the process of filling the mold with a closed sprue system are considered. The analysis of the obtained solutions shows that the movement

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27

Ostrikov, A. N., A. A. Shevtsov, T. N. Tertychnaya, and N. A. Serdyukova. "Exergetic analysis of the production technology of biodiesel from rapeseed oil." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 1 (2020): 252–61. http://dx.doi.org/10.20914/2310-1202-2020-1-252-261.

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Analysis of the efficiency reserves of the most promising technologies for biodiesel production showed the feasibility of implementing the technological cycle in the following sequence: first, the transesterification of vegetable oil with supercritical alcohol, then the fluid supercritical СО2 extraction of the cooled reaction mixture; its separation in the field of centrifugal forces to separate glycerol from the target product, and then the separation of carbon dioxide by gas-liquid separation to obtain purified biodiesel and return carbon dioxide to the extraction stage. In accordance with

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Genbach, A. A., D. Yu Bondartsev, and A. Y. Shelginsky. "Investigation of nanoscale and microscale structured cooling surfaces of thermal power plants." Safety and Reliability of Power Industry 15, no. 1 (2022): 38–44. http://dx.doi.org/10.24223/1999-5555-2022-15-1-38-44.

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Studies were conducted of the heat exchange crisis depending on the coolant excess (which determined the underheating and flow rate), the thermal-physical properties of the heating surface, and the ejection of liquid droplets from the porous structure. A model of dynamics of vapor bubbles born on the solid surface in porous structures and the vapor-generating wall (substrate) has been developed. The model is based on cinematography with an SKS-1M speed camera. The removal of high heat flows (up to 2·106 W/m2) is provided through the joint action of capillary and mass forces with the use of int

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Cong, Honglun, and Jiao Zhang. "Numerical investigation of the effects of dry gas model and wet steam model in solar-driven refrigeration ejector system." Chemical Product and Process Modeling, October 16, 2023. http://dx.doi.org/10.1515/cppm-2023-0042.

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Abstract Nowadays, the use of equipment with little pollution is essential due to the increase in the planet’s temperature. Ejectors are considered one of the equipment with no pollution, and their failure rate is low due to the lack of moving parts. Also, scholars have recently focused on improving the efficiency of industrial equipment. The use of accurate modeling is required to improve steam ejector performance. In a steam ejector, non-equilibrium condensation creates a two-phase flow situation. The wet steam model, used in this study, characterizes this two-phase flow. The study’s objecti

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Lin, Yongman, Zaijin Xie, Weihua Guan, and Lili Gan. "Numerical investigation of discharge pressure effect on steam ejector performance in renewable refrigeration cycle by considering wet steam model and dry gas model." Chemical Product and Process Modeling, July 4, 2024. http://dx.doi.org/10.1515/cppm-2023-0092.

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Abstract In recent times, steam ejectors have garnered significant interest among researchers due to their environmental friendliness and the utilization of low-grade energy sources. However, a key drawback of the ejector refrigeration cycle (ERC) is its relatively low coefficient of performance (COP). Understanding the behavior of ejectors under various operating conditions is crucial for addressing this concern. This study specifically focuses on investigating the flow characteristics of ejectors in the single-choking mode. Both dry steam model (DSM) and wet steam model (WSM) are employed to

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Kus, Tomasz, and Pawel Madejski. "Analysis of the multiphase flow with condensation in the two-phase ejector condenser using CFD modeling." Journal of Energy Resources Technology, December 5, 2023, 1–48. http://dx.doi.org/10.1115/1.4064195.

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Abstract The liquid-driven two-phase ejector condenser is the object of the numerical investigation. The spray-ejector condenser is a device and one of the critical components of the developed gas power plant with negative CO2 emission. The task of the ejector is to entrain gas and condense steam contained in the mixture of exhaust gases. CFD modelling allows analysing complex phenomena and predicting the influence of a wide range of operating parameters on the local structure of the multiphase flow with condensation. The geometrical model of the ejector was designed to provide efficient steam

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Chao, Lide, Hongjie Guo, Yong Xu, Yunqin He, and Guozhu Liang. "Performance prediction method of multi-stage steam ejector system in high-altitude simulation test." AIP Advances 15, no. 5 (2025). https://doi.org/10.1063/5.0244606.

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The Multi-Stage Steam Ejector System (MSSES) is essential for High-Altitude Simulation Tests (HASTs) of liquid rocket engines using active ejection. Rapid performance prediction is crucial due to the system’s high energy consumption. In this study, the one-dimensional gas dynamics theory was used to analyze MSSES performance under non-design operational conditions. The analysis is based on the assumption of constant-pressure mixing, considering that the steam and engine exhaust gas start mixing at a certain position in the cylindrical section of the second-throat ejector diffuser. An active ej

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L., Grinis, Lubashevsky N., and Ostrovski Y. "Experimental and CFD Simulation of the Jet Pump for Air Bubbles Formation." May 1, 2016. https://doi.org/10.5281/zenodo.1125445.

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A jet pump is a type of pump that accelerates the flow of a secondary fluid (driven fluid) by introducing a motive fluid with high velocity into a converging-diverging nozzle. Jet pumps are also known as adductors or ejectors depending on the motivator phase. The ejector's motivator is of a gaseous nature, usually steam or air, while the educator's motivator is a liquid, usually water. Jet pumps are devices that use air bubbles and are widely used in wastewater treatment processes. In this work, we will discuss about the characteristics of the jet pump and the computational simulation

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Liu, Bendong, Shijie Dong, Jingkai Tan, Desheng Li, and Jiahui Yang. "Design and flow simulation of a micro steam jet pump." Modern Physics Letters B 36, no. 09 (2022). http://dx.doi.org/10.1142/s021798492250018x.

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The development of micropump is directly related to the popularization and application of microfluidic systems. Recently, microfluidic systems have more urgent requirements for stable operation and simple structure of micropumps. For these purposes, a novel micro steam jet pump which uses planar induction heating to evaporate the initial fluid is presented. This new micropump could generate continuous flow with merits of no moving parts, stable operation and easy integration. A negative pressure is formed flowed with high-speed flow of vapor in the chamber to pump and eject liquid, and then re

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Jiang, Jieke, Eline van Daatselaar, Hylke Wijnja, et al. "Scalable Jet‐Based Fabrication of PEI‐Hydrogel Particles for CO₂ Capture." ENERGY & ENVIRONMENTAL MATERIALS, May 13, 2024. http://dx.doi.org/10.1002/eem2.12748.

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The capture, regeneration, and conversion of CO2 from ambient air and flue gas streams are critical aspects of mitigating global warming. Solid sorbents for CO2 absorption are very promising as they have high mass transfer areas without energy input and reduce emissions and minimize corrosion as compared to liquid sorbents. However, precisely tunable solid CO2 sorbents are difficult to produce. Here, we demonstrate the high‐throughput production of hydrogel‐based CO2‐absorbing particles via liquid jetting. By wrapping a liquid jet consisting of an aqueous solution of cross‐linkable branched po

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Singer, Csaba, Reiner Buck, Robert Pitz-Paal, and Hans Müller-Steinhagen. "Economic Chances and Technical Risks of the Internal Direct Absorption Receiver." Journal of Solar Energy Engineering 136, no. 2 (2013). http://dx.doi.org/10.1115/1.4024933.

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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 downward oriented aperture of a cylindrical cavity, whose internal lateral area is illuminated from t

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Бурдо, Олег Григорьевич, Александр Викторович Зыков, Всеволод Петрович Мордынский, Павел Иванович Светличный та Давар Ростамі Пур. "ИННОВАЦИОННЫЕ РЕШЕНИЯ В ТЕХНОЛОГИЯХ ОБЕЗВОЖИВАНИЯ". Scientific Works 82, № 1 (2018). http://dx.doi.org/10.15673/swonaft.v82i1.1021.

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Удаление влаги из пищевого сырья является одной из ключевых и наиболее энергозатратных задач пищевых технологий. Наиболее распространенными технологиями обезвоживания являются выпаривание и сушка. При этом енергетический КПД процесса сушки в 2 и более раз меньше КПД процесса выпаривания. Одним из путей совершенствования процесса обезвоживания есть использование технологий адресной доставки энергии, при которых не формируется пограничный слой, и концентрация раствора перестает быть критичной для обезвоживания сырья, что позволяет поднять конечную концентрацию сухих веществ в продукте до 92%. Пр

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