• Title/Summary/Keyword: Full-scale pump

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Performance Trial-Test of the Full-Scale Driving Pump for the Large Cavitation Tunnel(LCT) (대형캐비테이션터널(LCT) 실물 구동펌프 성능시운전)

  • Ahn, Jong-Woo;Kim, Gun-Do;Kim, Ki-Sup;Park, Young-Ha
    • Journal of the Society of Naval Architects of Korea
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    • v.52 no.6
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    • pp.428-434
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    • 2015
  • The objective of the present study is to analyze the results of the trial-test for the full-scale driving pump, which is arranged in the LCT (Large Cavitation Tunnel). Firstly, the reasons of selecting the final design pump are introduced in terms of the performance analysis in model tests. The trial-test items for the full-scale driving pump are measurements of output current/voltage at the inverter of the main motor and the flow velocity in the LCT test section. The test results show the increase in flow rate of about 10.7% and the decrease in pump head of about 26%, compared with those of final design-pump specification. The motor power has the margin of about 22%. The performance analysis for the full-scale pump is conducted using the commercial code (CFX-10). The delivered power calculated with CFX-10 shows good agreement with that extracted from the full-scale pump test. It is found that CFX-10 is useful to analyze a full-scale pump.

Pretreatment Condition in the Full Scale Dissolved Air Flotation Process Using a DAF Pump (DAF 펌프를 이용한 실규모 용존공기부상 공정의 전처리 조건)

  • Lee, Chang-Han;An, Dae-Myung;Kim, Seong-Soo;Cho, Seok-Ho;Ahn, Kab-Hwan
    • Journal of Korean Society of Environmental Engineers
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    • v.31 no.1
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    • pp.58-63
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    • 2009
  • Dissolved air flotation (DAF) process is generally considered more effective than sedimentation process in raw water containing algae, humus materials, and low density particles. This study presents the treatment efficiencies by the coagulation and flocculation conditions at a drinking water treatment plant using a laboratory tester and the full scale DAF pump system. The full scale DAF pump system (F-DAF) in this study had a capacity of 5,000 $m^3$/d and a hydraulic surface loading of 10 m/hr. F-DAF in D drinking water treatment plant was continuously operated to determine the operational performance and pretreatment (mixing and coagulation) conditions. Results in the laboratory experiment showed that the optimum coagulant (PSO-M) doses required to 2.7~4.5 mL/$m^3$/NTU with raw water turbidity from 13.8 NTU to 56.3 NTU. F-DAF in the optimum coagulant dosage could be operated in effluent turbidity of 1 NTU or below for a month.

Hot Test of a Turbopump for a Liquid Rocket Engine (액체로켓엔진용 터보펌프의 고온 성능시험)

  • Hong, Soon-Sam;Kim, Dae-Jin;Kim, Jin-Sun;Kim, Jin-Han
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.33 no.12
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    • pp.933-938
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    • 2009
  • Hot test of a full-scale turbopump for a 30-ton-thrust liquid rocket engine was carried out. The turbopump is composed of an oxidizer pump, a fuel pump, and a turbine on a single shaft. Model fluid was used in the test, that is, hot air for the turbine and water for the pumps. The turbopump was operated stably at full speed for 120 seconds. In terms of performance characteristics of pumps and turbine, the results from the turbopump assembly test are compared with those from the turbopump component tests which were performed at about half of the design rotational speed.

Study on the Silicon Pump and Control System for TFT-LCD Manufacturing Process (TFT-LCD 생산공정을 위한 실리콘 펌프 및 제어시스템에 관한 연구)

  • Park, Hyoung-Keun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.8
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    • pp.3618-3622
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    • 2012
  • In this study, the yield of the modules in LCD production lines, improving current TFT-LCD production process is essential for high-pressure silicone injection equipment, and precision control system was developed. This full-scale production of the future through the development of next-generation display production line is being prepared, being transferred to China in LCD production facilities can make the most of efficient equipment. Therefore, minimize the cost of new investment and help create the maximum effect to control the detailed behavior of the sequence H/W and S/W system was installed on the production line. In addition, Fast-evacuating the structure proposed for the Vacuum pump, Pump control circuit design and experimental results has been completed.

Measurement of Flow Field in a Domestic Boiler Circulation Pump by PIV (PIV에 의한 가정용보일러용 순환펌프의 내부 유동장 계측)

  • Im, Y.C.;Kim, J.H.;Choi, M.S.;Lee, Y.H.
    • Journal of Power System Engineering
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    • v.3 no.2
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    • pp.13-19
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    • 1999
  • The purpose of the present experimental study is to apply multi-point simultaneous measurement by PIV(Particle Image Velocimetry) to high-speed flow region within a domestic boiler circulation pump. Two different kinds of flow rate($27{\ell}/min,\;19{\ell}/min$)are selected as experimental condition. A volute casing and Impeller made of transparent Polycarbonate were made for the easy access of the illumination laser via fiber optical line and cylinder lens assembly to the measuring region. A CCD camera is syncronized with AOM to acquire clear original particle images. Optimized cross correlation identification to obtain velocity vectors is implemented by direct calculation of correlation coefficients. The instantaneous and time-mean velocity distribution, velocity profile and kinetic energy are represented quantitatively at the full-scale region for the deeper understanding of the unsteady flow characteristics in a commercial circulation pump.

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Measurement of Flow Field in a Domestic Hot-Water Pump by PIV (PIV에 의한 가정용 온수펌프의 유동장 계측)

  • Lee, H.;Im, Y. C.;Kim, J. H.;Lee, Y. H.
    • 유체기계공업학회:학술대회논문집
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    • 1999.12a
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    • pp.264-271
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    • 1999
  • The present experimental study is aimed to investigate the flow characteristics of the high-speed flow field within hot-water pump by PIV(Particle Image Velocimetry). As multi-point simultaneous velocity acquisition, 2-D PIV system based upon the two-frame gray-level cross correlation method is adopted using PC frame-grabber and simple video system. Gated image intensifier CCD Camera to cope with illumination problem is arranged for accurate PIV measurement of high-speed complex flow. The velocity vector distribution, velocity profile, and kinetic energy are represented quantitatively at the full-scale region for the deeper understanding of the unsteady flow characteristics in a pump.

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Performance Test of Turbopump Assembly for 75 Ton Liquid Rocket Engine Using Model Fluid (75톤급 액체로켓엔진용 터보펌프 조립체의 상사매질 성능시험)

  • Hong, Soon-Sam;Kim, Jin-Sun;Kim, Dae-Jin;Kim, Jin-Han
    • Journal of the Korean Society of Propulsion Engineers
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    • v.15 no.2
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    • pp.56-61
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    • 2011
  • Performance test of a full-scale turbopump assembly for a 75 ton class liquid rocket engine was carried out at full speed. Model fluid was used as a working medium: liquid nitrogen for the oxidizer pump, water for the fuel pump, and hot air for the turbine. The turbopump was operated stably, satisfying the performance requirements. Head coefficient and flow coefficient of the pumps remained constant at the speed-increasing period. In terms of performance characteristics of pumps and turbine, the results from the turbopump assembly test showed a good agreement with those from the turbopump component tests.

Performance Test of Turbopump Assembly for 75 Ton Liquid Rocket Engine Using Model Fluid (75톤급 액체로켓엔진용 터보펌프 조립체의 상사매질 성능시험)

  • Hong, Soon-Sam;Kim, Jin-Sun;Kim, Dae-Jin;Kim, Jin-Han
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2010.11a
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    • pp.27-32
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    • 2010
  • Performance test of a full-scale turbopump assembly for a 75 ton class liquid rocket engine was carried out at full speed. Model fluid was used as a working medium: liquid nitrogen for the oxidizer pump, water for the fuel pump, and hot air for the turbine. The turbopump was operated stably, satisfying the performance requirements. Head coefficient and flow coefficient of the pumps remained constant at the speed-increasing period. In terms of performance characteristics of pumps and turbine, the results from the turbopump assembly test showed a good agreement with those from the turbopump component tests.

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Experimental Study for Horizontal Geothermal Heat Pump Heating Performance Analysis (수평형 지열 히트펌프 난방 성능 분석을 위한 실험적 연구)

  • Ihm, Pyeong chan;Cho, Sung woo
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.12 no.2
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    • pp.7-12
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    • 2016
  • This study have an objective to suggest basic data and measured result of heating performance on water-water type horizontal geothermal heat pump which is based on heating and cooling load calculation result of small residential house. The average temperature during measured periods is $9.4^{\circ}C$ on primary EWT and is $7.6^{\circ}C$ on primary LWT. The temperature difference shows $1.8^{\circ}C$ as average temperature. Because the average outdoor temperature of peak is lager than on December and than on January, the temperature difference between EWT and LWT is bigger that on January than that on December. The system COP is 3.62.

A Study on Development of a Ground-Source Heat Pump System Utilizing Cast-in-place Concrete Pile Foundation of a Building (현장타설형 건물 기초를 이용한 지중열 공조시스템의 성능평가에 관한 연구)

  • Hwang, Suck-Ho;Nam, Yu-Jin
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.22 no.9
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    • pp.641-647
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    • 2010
  • Ground-source(Geothermal) heat pump(GSHP) systems can achieve a higher coefficient of performance than conventional air-source heat pump(ASHP) systems. However, GSHP systems are not widespread because of their expensive installation costs. The authors have developed a GSHP system that employs the cast-in-place concrete pile foundations of a building as heat exchangers in order to reduce the initial cost. In this system, eight U-tubes are arranged around the surface of a cast-in-place concrete pile foundation. The heat exchange capability of this system, subterranean temperature changes and heat pump performance were investigated in a full-scale experiment. As a result, the average values for heat rejection were 186~201 W/m(per pile, 25 W/m per pair of tubes) while cooling. The average COP of this system was 4.6 while cooling; rendering this system more effective in energy saving terms than the typical ASHP systems.