This research sought to determine the spatial distribution of hydraulic losses for a bidirectional axial-flow pump with arc- and S-shaped impellers. The unsteady Reynolds time-averaged Stokes (URANS) approach with the SST k-omega model was used to predict the internal flow field. The total entropy production (TEP) and total entropy …
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Largest flow compressor in the world. Hybrid axial/centrifugal design. Produced by MAN Diesel & Turbo for air separation. Flow rate > 278 m3/s (588,000 ACFM) Designed for atmospheric inlet pressure. 65 MW. MAN Axial/Radial. Mass flow of a GE Frame 9F Gas Turbine=600kg/s (498 m3/s) but with atmospheric inlet pressure.
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In addition, the velocity gradient and pressure gradient of the medium near the wall are high. In order to accurately simulate the boundary layer effect of the flow, the boundary layer mesh is encrypted accordingly. As shown in Figure 4, the mean value of y + on the blade surface is controlled to be around 30 to meet the requirements of numerical …
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Blade solidity is optimized to delay windage phenomenon in CAES system. The optimal stator solidity of stage1 for a two-stage axial flow turbine is recommended to close 1.0. The relative isentropic efficiency is increased by 4.9 % with the optimal solidity. It provides ideas for the optimized off-design performance for multi-stage …
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1. Introduction Owing to the decline in fossil fuels and their environmentally harmful combustion, people are looking for alternatives (Caban-Acevedo et al., 2015; Sudarsanam et al., 2020), such as solar, wind, water and other renewable energy sources, to directly generate electricity. ...
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Tidal energy is one of the most mature energy sources used in all kinds of ocean energy. Axial flow impeller plays a key role in converting potential energy and kinetic energy of seawater into electric energy. 14. Zhao Y, Li Z, Dang M, et al. Numerical study on
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As for the pressure pulsation, a pressure coefficient is defined (Zeng et al., Citation 2021b): (20) C p = p i − p ¯ 0.5 ρ U 2 2 (20) where p i is the unsteady pressure, p ¯ is the time-averaged pressure, U 2 is the circumferential velocity at …
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Blade lean and sweep are additional degrees of freedom for the three dimensional blade design. When compared to blade sweep, the influence of blade lean on the performance is not extensively described in the public literature. The effects of blade lean on the aerodynamic performance of a high-pressure ratio centrifugal impeller were …
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As the impeller rotates it imparts kinetic energy or velocity onto the water. By the time the water reaches the edge of the impeller it has reached a very high velocity. This high-speed water flows off the impeller and into the volute where it hits the wall of the pump casing. This impact converts the velocity into potential energy or …
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Its main functions include pumping seawater from low-water areas to high-water areas for energy storage [2]. Specifically, ... At 1.0Q, the outlet pressure of the two-diffuser part is obviously higher than the inlet pressure, …
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Establishing methods for distinguishing different types of flow structures and the corresponding energy loss of impellers. • Discussing the secondary flow …
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The flow pattern evolution is particularly complicated in the low specific speed impeller of ultrahigh-head pump turbines. To reveal the mechanism of pressure p Xiaolong Fu, Deyou Li, Jingwei Lv, Biao Yang, Hongjie Wang, Xianzhu Wei; High-amplitude pressure pulsations induced by complex inter-blade flow during load rejection of ultrahigh …
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Compressed Air Energy Storage (CAES) has tremendous promotional value in the intermittent renewable energy supply systems. CAES has special …
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Impeller types in Centrifugal Pumps vary in design depending on the fluid being handled, whether design is low or high pressure, and if the unit designed is self-priming or to handle entrained …
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The two zones with high and low pressure and density represent the main channel of the energy and mass transport cycle with a higher axial velocity than the circumferential average position. Compared with the temperature stagnation parameter, the …
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The turbine in Compressed Air Energy Storage (CAES) systems often operates under off-design ... A study of the effect of blade count on efficiency using 3D CFD for high pressure steam turbines, Proc. ASME. …
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The internal flow field and loss distributions are quite complicated in the high-pressure compressor with shroud and backside cavity applied in the compressed air energy storage (CAES) system. 4. Guo H, Xu Y, Zhang Y, et al. Off-design performance and an optimal ...
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Therefore, in this study, a novel method is proposed to calculate the Euler work of compressor impellers considering the influence of natural prewhirl by deriving …
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high-dampening bearings • Power: 5.1 MW (6836 HP) • Applications: High-pressure CO 2 delivery for applications such as urea production, carbon capture storage, and enhanced oil recovery. Also used as a working fluid in energy recovery and in heat pumps.
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As a key energy equipment of the compressed air energy storage (CAES) system, the centrifugal compressor with shroud cavity is employed to avoid the leakage …
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To investigate the spatiotemporal evolution mechanism of the axial force on a centrifugal pump acting as a turbine, this study focuses on a single-stage singlePeixuan Li, Wei Dong, Haoqing Jiang, Haichen Zhang; Analysis of axial force and pressure pulsation of centrifugal pump as turbine impeller based on dynamic mode decomposition.
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The Compressed Air Energy Storage (CAES) system is a promising energy storage technology that has the advantages of low investment cost, high safety, long life, and is clean and non-polluting. The compressor/expander is the core equipment of the CAES system, and its performance has a decisive impact on the overall system …
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This paper presents the matching characteristics of impellers and guide vanes of high capacity and pressure seawater desalination pumps by using computational fluid dynamics (CFD). The …
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In order to explore the off-design performance of a high-pressure centrifugal compressor (HPCC) applied in the compressed air energy storage (CAES) system, the author successfully built a high-pressure centrifugal compressor test rig for …
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IMAGE 9: Pump design points. When unit-B runs at 2,082 rotations per minute (rpm) and flow of around 31,000 gpm, the power through the pumps will be between 18,000 to 19,000 hp, while at 2,230 rpm and flow of ~46,000 gpm, the power through the pumps will be ~28,000 hp. This indicates high energy for each impeller, approximately …
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Here, the reduced models could obtain somewhat lower torque for the impeller and hub (rotor) so that the total efficiency could be compensated, and the torque was reduced by approximately −0.1-0 ...
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Relying on a closed test rig of a high-power intercooling centrifugal compressor for compressed air energy storage (CAES), this study measured the static pressure and static temperature at different …
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During the energy storage process, the outflow of the cooler is high-pressure liquid air. For safety and other reasons, the liquid in the tank has a low pressure. To depressurize the fluid, the throttling valve has to be used in the system during the energy storage process.
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In an industrial research project of German and Swiss Turbo Compressor manufacturers a high pressure ratio centrifugal impeller was designed and investigated. Performance measurements and extensive laser measurements (L2F) of the flow field upstream, inside and downstream of the rotor have been carried out. In addition to that, …
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The aerodynamic performance of the high-pressure centrifugal compressor is compared by experiment and calculation. Then, the main flow …
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The performance of the turbocharger can be improved by optimizing the structural parameters of the compressor impeller. In this work, the existing centrifugal …
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DOI: 10.1016/j.est.2022.104024 Corpus ID: 246842169 Flow characteristics of impeller backside cavity and its effects on the centrifugal compressor for compressed air energy storage Compressed air energy storage system has the advantages of …
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Both the efficiency and total pressure head of the axial-flow pump are thought to increase, owing to the changing of the IGV setting angle, which produces a flow with higher energy at the impeller ...
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The impeller backside cavity (IBC) is a unique structure of centrifugal compressor in compressed air energy storage (CAES) systems, which affects the …
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2 The eight-stage GT-Series CO compressor incorporates Atlas Copco Gas and Process''s proven impeller, aerodynamics and integral gear design, along with specially designed robust casing and dynamic gas seals, to create a complete all-in-one solution for high-pressure carbon dioxide delivery. Impeller and rotor assembly.
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