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다이아프램형 Multi-stage 솔레노이드 밸브의 오리피스에 관한 연구
정찬세(C. S. Jeong),이형욱(H. U. Lee),윤두환(D. H. Yun),양순용(S. Y. Yang) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.10
Port size 80mm or above large-flow type solenoid valves are extensively used in dust collector and power plants, steel mills and industrial water need where little power in used to control the large flow and high pressure; multi-stage diaphragm type solenoid valves are used. These multi-stage solenoid valves that rely on imports and are weak in the brine environment and the low energy efficiency are the main shortcomings of the present solenoid valves. Also, the necessity of research on the development of large flow and high pressure type solenoid valves is gradually increasing. In this study, a large flow multi-stage solenoid valve has been designed and developed by configuring the orifice, diaphragm and solenoid. At first each part has modeled and by combining them a virtual multi-stage solenoid valve has developed and finally the following results have derived from the simulation results of the developed model.
정찬세(C. S. Jeong),양순용(S. Y. Yang) 유공압건설기계학회 2013 드라이브·컨트롤 Vol.10 No.1
Port size 80mm or above large-flow type solenoid valves are extensively used in dust collector and power plants. These multi-stage solenoid valve have few problem. first, multi-solenoid valves are almost depend on imports and there are weak in the brine environment and the low energy efficiency. Because these problem, increased the necessity of research on the development of large flow and high pressure type solenoid valves. In this study, describe the design method of multi-stage solenoid test bench and confirm the influence valve performance on several parameter such as diaphragm orifice diameter. At first, each part has modeled by AMESim simulation tool and combining them. This AMESim virtual multi-stage solenoid valve found influence valve performance on the valve parameter. Finally developed the multi-stage solenoid valve and verified that performance on experimental result.
순산소 연소 배출 입자 제거용 건식 전기집진장치 운전 특성
김학준(Hakjoon Kim),한방우(Bangwoo Han),오원석(Wonseok Oh),황규동(Gyudong Hwang),김용진(Yongjin Kim),홍정희(Jeonghee Hong) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.1
본 연구에서는 순환방식의 1000 CMH급 전기집진장치 성능평가 시스템 구축하여, 대용량 순산소연소 장치 없이 순산소 연소가스 모사 조건(고농도 CO₂ 조건)에서 엣지-평판형 전기집진장치를 방전극 형상, 집진판 간격, 유입속도, 가스조성 및 분진 입경에 따라 성능을 평가하였다. CO₂ 70% 조건에서 3종 방전극에 대해 성능 비교를 한 결과, 방전극 편 면적이 넓은 방전극이 상대적으로 높은 포집효율을 나타내었다. 또한 유입속도가 감소할수록, 분진 입경이 증가할수록, 집진판 간격이 좁을수록 분진 집진효율이 증가하였으나, CO₂ 농도가 증가할수록 효율이 감소하였다. 그러므로 CO₂ 농도가 높을 것으로 예상되는 순산소 연소 등 배기가스 조건에 적용되는 전기집진장치를 설계할 경우, 기존과 동일한 단위 가스 체적 당 코로나 전력 조건에서 집진장치 내부 유속을 줄이거나 집진판 간격을 좁히는 설계변화가 요구되며, 방전극의 경우 방전편 면적이 넓으면서 코로나 전류가 높은 방전극이 적용되야 할 것으로 판단된다. In a test duct with closed configuration, particle removal performance of an edge-plate type electrostatic precipitator (ESP) was evaluated at a high flow rate in CO₂ rich environments by changing gap distances between collection plates, concentrations of CO₂, particle sizes, types of electrodes, and types of power supplies. At the same experimental conditions, collection efficiency of particles with the mean particle size, 300 ㎚, decreased as the gap distance and CO₂ concentration increased because of low electrostatic force and low discharged current. In addition, as the particle size increased, the efficiency increased because of high charging rate of the large particles. With the electrode type which has higher surface area of a discharging plate and with the power supply which applied 25 ㎑-pulsed DC voltages, the removal efficiency was high even in rich CO₂ condition due to high electrostatic force at the same power consumption.
김학준(Hak-Joon Kim),한방우(Bangwoo Han),정상현(Sang-Hyun Jeong),홍원석(Won-Suk Hong),신완호(Wan-Ho Shin),송동근(Dong-Keun Song),길상인(Sang-In Keel),김용진(Yong-Jin Kim),홍정희(Jeong-Hee Hong) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In a test duct with closed configuration, particle removal performance of an edge-plate type electrostatic precipitator (ESP) was evaluated at a high flow rate in CO₂ rich environments by changing gap distances between collection plates, concentrations of CO₂, particle sizes, types of electrodes, and types of power supplies. At the same experimental conditions, collection efficiency of particles with the mean particle size, 300 ㎚, decreased as the gap distance and CO₂ concentration increased because of low electrostatic force and low discharged current. In addition, as the particle size increased, the efficiency increased because of high charging rate of the large particles. With the electrode type which has higher surface area of a discharging plate and with the power supply which applied 25 ㎑-pulsed DC voltages, the removal efficiency was high even in rich CO₂ condition due to high electrostatic force at the same power consumption.