The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Yuri Biba - One of the best experts on this subject based on the ideXlab platform.
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Development of a Rotating Centrifugal Separator Technology for Centrifugal Compressors
Volume 7: Turbomachinery Parts A B and C, 2010Co-Authors: William Maier, Gocha Chochua, Yuri BibaAbstract:This paper presents the development and testing of an advanced rotating Centrifugal Separator. This design extends separation technology to higher velocity and flowrate capabilities suitable for use as an inlet scrubber for industrial Centrifugal compressors. Because of the inherent compact nature of the device it is particularly useful for oil and gas applications on offshore platforms where size and weight have high value. In addition to the Separator design, a non-dimensional separation parameter is developed from first principles and is shown to be useful in accessing the degree of difficulty of separation for rotating Centrifugal Separator devices. An overview of a novel design evolution procedure used to optimize the rotating Centrifugal Separator is also presented.Copyright © 2010 by ASME
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Design Optimization and Testing of Combined Centrifugal Separation and Compressor Technology
Proceedings of the Thirty-Ninth Turbomachinery Symposium, 2010Co-Authors: William Maier, Yuri BibaAbstract:The relatively new technology of rotary gas-liquid separation has been advanced by the development of a rotating Centrifugal Separator closely coupled to a Centrifugal turbocompressor. This development by a major equipment manufacturer included the creation and calibration of an integrated design suite, and the use of this tool to optimize a Separator/compressor stage. The compression and separation performance of this design was verified by building test hardware and testing it in the original equipment manufacturer's (OEM's) multiphase flow loop. Overall test results agreed well with performance predicted by the design tools.
William Maier - One of the best experts on this subject based on the ideXlab platform.
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Multiphase CFD Model Development for a Rotating Centrifugal Separator
Volume 8: Turbomachinery Parts A B and C, 2012Co-Authors: Daniel Demore, William MaierAbstract:The present paper describes the development of a Computational Fluid Dynamic (CFD) modeling approach suitable for the analysis, design, and optimization of rotating Centrifugal Separator stage geometries. The Homogeneous Multiple Size Group (MUSIG) model implemented in the commercial code CFX V13.0 was utilized as a basis for the CFD modeling method. The model was developed through a series of studies to understand the impact of droplet size distribution, particle coalescence, rotor/stator interface treatment, and mesh resolution on the prediction of separation efficiency for a given rotating Separator geometry. This model was then validated against the OEM’s extensive in-house experimental separation testing database. The resulting CFD modeling method is shown to adequately reproduce observed trends in separation performance over a wide range of operating conditions.Copyright © 2012 by ASME
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Development of a Rotating Centrifugal Separator Technology for Centrifugal Compressors
Volume 7: Turbomachinery Parts A B and C, 2010Co-Authors: William Maier, Gocha Chochua, Yuri BibaAbstract:This paper presents the development and testing of an advanced rotating Centrifugal Separator. This design extends separation technology to higher velocity and flowrate capabilities suitable for use as an inlet scrubber for industrial Centrifugal compressors. Because of the inherent compact nature of the device it is particularly useful for oil and gas applications on offshore platforms where size and weight have high value. In addition to the Separator design, a non-dimensional separation parameter is developed from first principles and is shown to be useful in accessing the degree of difficulty of separation for rotating Centrifugal Separator devices. An overview of a novel design evolution procedure used to optimize the rotating Centrifugal Separator is also presented.Copyright © 2010 by ASME
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Design Optimization and Testing of Combined Centrifugal Separation and Compressor Technology
Proceedings of the Thirty-Ninth Turbomachinery Symposium, 2010Co-Authors: William Maier, Yuri BibaAbstract:The relatively new technology of rotary gas-liquid separation has been advanced by the development of a rotating Centrifugal Separator closely coupled to a Centrifugal turbocompressor. This development by a major equipment manufacturer included the creation and calibration of an integrated design suite, and the use of this tool to optimize a Separator/compressor stage. The compression and separation performance of this design was verified by building test hardware and testing it in the original equipment manufacturer's (OEM's) multiphase flow loop. Overall test results agreed well with performance predicted by the design tools.
Hideto Yoshida - One of the best experts on this subject based on the ideXlab platform.
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Effect of new blade of Centrifugal Separator on particle separation performance
Separation and Purification Technology, 2016Co-Authors: Tetsuya Yamamoto, Hideto Yoshida, Takashi Kageyama, Kunihiro FukuiAbstract:Abstract In order to increase particle separation efficiency of the Centrifugal Separator, a new blade is proposed and particle separation performance was examined by experiment and numerical simulation method. For the type A blade with inside cylinder and four blades, the 50% cut size decreases with the increase of inside cylinder diameter. The pressure drop of the type A blade increases as the inside diameter increases, especially diameter ratio greater than 0.8. The new blade of type B with inside cylinder, four blades and special rings on the inside cylinder shows higher particle separation efficiency and low pressure drop compared with the type A blade. The experimental partial separation efficiency qualitatively agreed with the numerical simulation results.
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classification of particles by Centrifugal Separator and analysis of the fluid behavior
Advanced Powder Technology, 2011Co-Authors: Tetsuya Yamamoto, Kunihiro Fukui, Tomohiko Shinya, Hideto YoshidaAbstract:Abstract This study gives fundamental knowledge on the particle classification performance by Centrifugal Separator. It is found that the cut size of a Centrifugal Separator decreases as the rotational speed increases and the liquid flow rate decreases. Fitting our experimental results with the theory, they agree with each other at high flow rate. However, the difference between them generates at low flow rate. This is because dead spaces are generated in the Centrifugal Separator at the low flow rate. Also, the computer simulation of the fluid behavior in the Centrifugal Separator can find the decrease of the velocity near the wall under the low flow rate, which suggests the possibility of the formation of dead spaces in the Separator.
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Effect of inner structure of Centrifugal Separator on particle classification performance
Powder Technology, 2009Co-Authors: Tetsuya Yamamoto, Natsuko Watanabe, Kunihiro Fukui, Hideto YoshidaAbstract:This study investigated the effects of the inner structure of a Centrifugal Separator on particle classification performance. The typical inner structure of Centrifugal Separators is as follows: a blade, which consists of two orthogonal plates, is inserted into the Centrifugal Separator to create rigid fluid and particle rotations. The results of the present study demonstrate that Centrifugal Separator performance was significantly improved by attachment of a cylinder to the center of a conventional blade. Modification of the Separator by attachment of the cylinder to the center of the Centrifugal Separator is expected to prevent the particles in the slurry from passing through the central axis of the Centrifugal Separator. Hence, the particles are subjected to greater Centrifugal force. Both experimental and theoretical results demonstrate that particle classification performance increases as the cylinder radius increases. Thus, it is evident that attachment of a cylindrical blade to the center of the Centrifugal Separator allows for effective and highly efficient collection of extremely small-classified fine particles.
Masami Tsunekawa - One of the best experts on this subject based on the ideXlab platform.
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feasibility of an efficient recovery of rare earth activated phosphors from waste fluorescent lamps through dense medium centrifugation
Separation and Purification Technology, 2005Co-Authors: Tsuyoshi Hirajima, Keiko Sasaki, Abel Bissombolo, H Hirai, M Hamada, Masami TsunekawaAbstract:Abstract Experiments were carried out with waste phosphors collected during the recycling of end-of-life fluorescent lamps to obtain a highly enriched phosphors product as starting material for the better extraction of rare earth elements. The aim of this work was therefore to separate low-density calcium halo-phosphate phosphors from high-density rare earth-activated phosphors through dense-medium centrifugation (with di-iodomethane as organic dense-medium). The feasibility of the process and the conditions for a good separation (higher Newton's efficiency) appear to be a function of the rotation speed of the Centrifugal Separator, the pulp concentration and the adsorption of a surfactant (sodium oleate, NaOl) during the pre-treatment stage. The effect of the centrifugation time was less pronounced. Through this study, a sink product assaying 48.61% of rare earth-activated phosphors could be recovered from waste phosphor materials pre-treated with 5 × 10 −5 mol/dm 3 of sodium oleate (NaOl) surfactant. The Newton's efficiency and recovery of the separation were 0.84 and 97.34%, respectively. The process feasibility was reinforced by the possibility to recover, through laboratory batch tests, more than 99.8% of the di-iodomethane (CH 2 I 2 ).
Tetsuya Yamamoto - One of the best experts on this subject based on the ideXlab platform.
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Effect of new blade of Centrifugal Separator on particle separation performance
Separation and Purification Technology, 2016Co-Authors: Tetsuya Yamamoto, Hideto Yoshida, Takashi Kageyama, Kunihiro FukuiAbstract:Abstract In order to increase particle separation efficiency of the Centrifugal Separator, a new blade is proposed and particle separation performance was examined by experiment and numerical simulation method. For the type A blade with inside cylinder and four blades, the 50% cut size decreases with the increase of inside cylinder diameter. The pressure drop of the type A blade increases as the inside diameter increases, especially diameter ratio greater than 0.8. The new blade of type B with inside cylinder, four blades and special rings on the inside cylinder shows higher particle separation efficiency and low pressure drop compared with the type A blade. The experimental partial separation efficiency qualitatively agreed with the numerical simulation results.
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classification of particles by Centrifugal Separator and analysis of the fluid behavior
Advanced Powder Technology, 2011Co-Authors: Tetsuya Yamamoto, Kunihiro Fukui, Tomohiko Shinya, Hideto YoshidaAbstract:Abstract This study gives fundamental knowledge on the particle classification performance by Centrifugal Separator. It is found that the cut size of a Centrifugal Separator decreases as the rotational speed increases and the liquid flow rate decreases. Fitting our experimental results with the theory, they agree with each other at high flow rate. However, the difference between them generates at low flow rate. This is because dead spaces are generated in the Centrifugal Separator at the low flow rate. Also, the computer simulation of the fluid behavior in the Centrifugal Separator can find the decrease of the velocity near the wall under the low flow rate, which suggests the possibility of the formation of dead spaces in the Separator.
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Effect of inner structure of Centrifugal Separator on particle classification performance
Powder Technology, 2009Co-Authors: Tetsuya Yamamoto, Natsuko Watanabe, Kunihiro Fukui, Hideto YoshidaAbstract:This study investigated the effects of the inner structure of a Centrifugal Separator on particle classification performance. The typical inner structure of Centrifugal Separators is as follows: a blade, which consists of two orthogonal plates, is inserted into the Centrifugal Separator to create rigid fluid and particle rotations. The results of the present study demonstrate that Centrifugal Separator performance was significantly improved by attachment of a cylinder to the center of a conventional blade. Modification of the Separator by attachment of the cylinder to the center of the Centrifugal Separator is expected to prevent the particles in the slurry from passing through the central axis of the Centrifugal Separator. Hence, the particles are subjected to greater Centrifugal force. Both experimental and theoretical results demonstrate that particle classification performance increases as the cylinder radius increases. Thus, it is evident that attachment of a cylindrical blade to the center of the Centrifugal Separator allows for effective and highly efficient collection of extremely small-classified fine particles.