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급수가열기 추기노즐 충격판 주변의 동체감육 현상규명을 위한 실험적 연구
이우(Woo Lee),엄상윤(Sang-yoon Eom),김경훈(Kyung-Hoon Kim),황경모(Kyung-Mo Hwang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Feedwater heater in closed cooling system apply heat up inflow steam and water from High Pressure Turbine(HPT) and Moisture Separator and Reheater(MSR) in Power generation plant. It have recently experienced severe wall thinning damage, which increases as operating time progress. Shell wall thinning of feedwater heater components due to Flow Accelerated Corrosion(FAC) is fatal problem in Nuclear Power Plan(NPT). FAC is dependent on many parameters such as the operation temperature, void fraction, the fluid velocity and pH of fluid and so on. Therefore, in this paper included in the fluid mixing an experimental model are around the number 5A feedwater heater shell including the extraction pipeline. Feedwater heaters of many nuclear power plants have recently experienced severe wall thinning damage, experiment with a down scale model of extraction nozzle impinging plate of a feedwater heater and it is expected that will be application to proving.
이우(Woo Lee),김상현(Sang-Hyun Kim),오승홍(Seung-Hong Oh),손민우(Min-Woo Son),김원중(Won-Jung Kim) 한국전자통신학회 2023 한국전자통신학회 논문지 Vol.18 No.1
현재 도선과 예선은 선박의 접·이안과 입출항을 지원함으로써 선박, 항만, 인명에 대한 사고 발생을 방지하여 재산상 피해를 최소화하거나 제거하는 기능을 수행한다. 도·예선 시스템은 항만의 기능이 원활하게 이루어지게 하는 필수적인 기능으로 항만의 물동량에 가장 큰 영향을 미치는 시스템이다. 본 연구에서는 도·예선의 운영정보를 활용하여 항만의 운영 효율화, 선박 대기시간 단축, 선박 운영의 최적화, 최적의 도·예선 배정이 가능한 도·예선 정보체계 분석 운영시스템을 개발하였다. Currently, pilots and tugs perform the function of minimizing or eliminating property damage by preventing accidents on ships, ports, and human life by supporting docking/unloading and access and departure of ships. The piloting/tuging system is an essential function for the smooth functioning of the port, and it is the system that has the greatest influence on the cargo volume of the port. In this study, we developed an pilot and tugs information system analysis and operating system that can improve port operation efficiency, reduce the waiting time of ships, optimize the operation of ships, and allocation of optimal pilots and tugs by utilizing the operation information of the tugbosts.
이우(Woo Lee),권준아(Jun-A Kwon),김원중(Won-Jung Kim) 한국전자통신학회 2019 한국전자통신학회 논문지 Vol.14 No.6
시대의 변화와 함께 우편서비스 환경과 고객의 서비스 요구는 크게 변화하고 있다. 본 논문에서는 ICT 기술을 활용하여 등기우편물에 대한 비효율적인 서비스를 개선하기 위한 연구를 진행하였다. ICT 기반 스마트 우편함 시스템은 우편물을 효율적으로 배송하고, 고객의 만족도를 향상시킬 수 있다. 또한, 집배원들의 우편물 배달에 대한 업무강도를 경감시켜고, 현장 집배원들의 근로환경의 개선에도 크게 도움을 줄 수 있을 것으로 기대된다. With the change of times, the postal service environment and the customer s service needs are changing greatly. In this paper, we researched to improve inefficient service for registered mail by using ICT technology. ICT-based non-face-to-face smart mailbox system can deliver mail efficiently and improve customer satisfaction. In addition, it is expected that it will be able to reduce the work intensity of the mailman delivery of mail and greatly improve the working environment of the on-site deliverymen.
난소 종양으로 오진된 신장 무형성을 동반한 우측 흔적 자궁각
이기은 ( Ki Eun Lee ),권혜진 ( Hye Jin Kwon ),정현재 ( Hyun Jae Jeong ),박정우 ( Jung Woo Park ),최효성 ( Hyo Seong Choi ),이춘수 ( Choon Soo Lee ),황성욱 ( Sung Ook Hwang ),송은섭 ( Eun Seop Song ),이병익 ( Byoung Ick Lee ),이우 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.1
Rudimentary uterus with ipsilateral renal agenesis is a very rare Mullerian duct malformation. The most common clinical presentation is pelvic pain and dysmenorrhea shortly after menarche, in associated with the finding of a vaginal or pelvic mass. An appropriate and prompt diagnosis and treatment will prevent unnecessary procedures and offer relief of symptoms. We report one case of rudimentary uterine horn with ipsilateral renal agenesis with a brief review of concerned literatures.
정석윤(Seokyoon Jeong),이우(Woo Lee),이기수(Gisoo Lee),김경훈(Kyunghun Kim),배상현(Sanghyun Bae),김혜삼(Hyesam Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This research focused on the flow analysis of continuos regeneration Diesel Particulate Filter(DPF) for Diesel engines. Generally diesel engines are relatively superior to gasoline engine on the fuel consumption durability and combustion efficiency. But diesel engines are general1y known to be harmful to environment such as CO, HC, SOF and Particulate Matter(PM). For this reason, as an DPF and quality control of fuel has been applied as an after treatment system. In this study, the analysis was done on an heavy-duty diesel engine on which continuous regeneration DPF was installed in order to investigate the flow distribution and uniformity at the front of catalyst inlet on the change of shape of DPF.
엄상윤(Sang-yoon Eom),이우(Woo Lee),김경훈(Kyung-Hoon Kim),황경모(Kyung-Mo Hwang) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Feedwater heater in closed cooling system apply heat up inflow steam and water from High Pressure Turbine(HPT) and Moisture Separator and Reheater(MSR) in Power generation plant. It have recently experienced severe wall thinning damage, which increases as operating time progress. Shell wall thinning of feedwater heater components due to Flow Accelerated Corrosion(FAC) is fatal problem in Nuclear Power Plan(NPT). It is fouded that wall thinging of feedwater Heater Because of being reflicted vapor at existing experiment of impinging baffle model. Reflected vapor crashed specific part of Feedwater Heater, so it acccelerlated corroison on acount of FAC. There is various Method of constrain corrosion, it will be effective that is changed by flow of fluid than charactor of fluid. Therefore It is changed size of pitch and hole on Advanced Impinging Baffle and choiced excellent Impinging Baffle.
DOC 배플 위치에 따른 담체 입구에서의 유동균일도 평가
정석윤(Seokyoon Jeong),이우(Woo Lee),이기수(Gisoo Lee),김경훈(Kyunghun Kim),배상현(Sanghyun Bae),김혜삼(Hyesam Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The technologies reduction in exhaust emissions from diesel engines are simply defined as two; one is quality control of improvement fuel system and the other is development of diesel exhaust aftertreatment. An aftertreatment devices reduce exhaust gas of diesel engine, diesel oxidacatalyst(DOC) with high reduction efficiency for harmful matter and particulate matter. We carried out the evaluation of flow uniformity in substrate inlet on location Diesel Oxidation Catalysts (DOC) for heavy duty diesel engine vehicles. It was found that better conversion efficiency depends on the condition of temperature and shape of DOC inlet. In this study, the location of baffle inside DOC was analyzed in order to show the flow distribution and uniformity research as well as the effects of flow analysis.