• Title/Summary/Keyword: Circular separator

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Effects of Co-current and Cross Flows on Circular Enhanced Gravity Plate Separator Efficiencies

  • Ngu, Lock Hei;Law, Puong Ling;Wong, Kien Kuok
    • Environmental Engineering Research
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    • v.19 no.2
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    • pp.151-155
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    • 2014
  • This study compares the effects of flow on oil and suspended solids removal efficiencies in circular enhanced gravity plate separator equipped with coalescence medium. Coalescence medium acts to capture rising oil droplets and settling solid particles and assist in the coalescence of oil and coagulation of solid. The circular separator uses an upflow center-feed perforated-pipe distributor as the inlet. The co-current flow is achieved using 4 increasing sizes of frustum, whereas cross flow uses inclined coalescence plates running along the radius of the separator. The different arrangement gave the cross flow separator a higher coalescence plan area per operational volume, minimal and constant travelling distance for the oil droplets and particles, lower retention time, and higher operational flowrate. The cross flow separator exhibited 6.04% and 13.16% higher oil and total suspended solids removal efficiencies as compared to co-current flow.

Design and fabrication of circular-polarization separator using a glancing angle deposition (Helical structure) (경사입사 증착법 (나선형 구조)을 이용한 원편광 분리소자의 설계 및 제작)

  • Park, Yong-Jun;HwangBo, Chang-Gwon
    • Proceedings of the Optical Society of Korea Conference
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    • 2007.02a
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    • pp.151-152
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    • 2007
  • In this study, the optical porosity of $TiO_2$ films with helical structure deposited by glancing angle deposition (GLAD) were investigated. Helical films are of interest due to their ability to differentiate states of circularly polarized light. We designed and fabricated normal-incidence circular-polarization separator deposited by GLAD (Helical structure). The optical porosity of $TiO_2$ film deposited by helical method can be applied many optical coatings.

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Operation of A Small MCFC Stack Using New Designed Circular Separator (새로운 원반형 구조의 분리판을 사용한 소형 용융탄산염 스택의 운전)

  • Han, Jonghee;Roh, Gil-Tae;Yoon, Sung Pill;Nam, Suk Woo;LIm, Tae Hoon;Hong, Seong Ahn
    • Transactions of the Korean hydrogen and new energy society
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    • v.14 no.3
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    • pp.229-235
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    • 2003
  • A 50W class MCFC stack was operated in order to test a new design of the circular shaped separator. in the new design, the anode gas was supplied into the stack and was exhausted out of the stack after the anode reaction. The exhausted gas was reacted with the cathode gas supplied with excess oxygen in the vessel in which the stack was placed. Then the reacted gas flowed into the cathode side of the stack and was exhausted through the outlet located in the center of the stack. The average voltage of the single cells in the stack was 0.835V under the current density of $150mA/cm^2$, initially, and the degradation rate of the stack voltage was 1.7%/1,000h. High stack voltage with good stability of the present stack was due to the small temperature gradient in the stack. The small temperature gradient as well as the easiness of temperature control was the result of the new configuration of the separator which utilized the heat of the combustion reaction between anode outlet gas and the cathode inlet gas for heating the stack.

Analysis of Dynamic Behaviors of Transmission Fluid Film in Wet Clutch Pad according to Patterned Grooves (습식클러치 패드의 Groove 패턴에 의한 변속기유의 동적 거동)

  • Kim, Hae Yong;Jang, Siyoul;Kim, WooJung;Shin, Soon Cheol
    • Tribology and Lubricants
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    • v.30 no.2
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    • pp.92-98
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    • 2014
  • Transmission fluid film behaviors in the gap between the wet clutch pad and separator plate are analyzed using the CFD software ADINA. Three pattern groove designs are selected and are used to validate the fluid film behaviors based on the outlet flow in the gap when the wet clutch pad and separator plate are engaged. The main design goal for pattern grooves is faster engagement. In most cases, much of the outlet flow of transmission fluid in the gap occurs on the outer radius boundary due to the centrifugal force generated by the clutch pad circular motion. Groove patterns are created to ensure faster transmission fluid outlet flow in the direction of the inner radius boundary. Computational results of the selected groove patterns are compared.