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관측시스템 실험을 통한 한반도 근해 Argo 플로트 관측자료의 자료동화 효과 평가
추성호(Sung-Ho Choo),장필훈(Pil-Hun Chang),황승언(Seung-On Hwang),조형준(Hyeong-Jun Jo),이조한(Johan Lee),이상민(Sang-Min Lee),현유경(Yu-Kyung Hyun),문재홍(Jae-Hong Moon) 한국기상학회 2021 대기 Vol.31 No.3
An Observing System Experiment (OSE) using Global Ocean Data Assimilation and Prediction System (GODAPS) was conducted to evaluate the assimilation impact of Argo floats, deployed by National Institute of Meteorological Sciences/Korea Meteorological Administration (NIMS/KMA), in marginal seas around Korean peninsula. A data denial experiment was run by removing Argo floats in the Yellow Sea and the East Sea from an operational run. The assimilation results show that Argo floats bring the positive impact on the analysis of ocean internal structure in both Yellow Sea and East Sea. In the East Sea, overall positive impact in the water temperature and salinity context is found, especially outstanding improvement from 300 to 500 m depth. In the Yellow sea, the assimilation impact on water temperature and salinity is also large within 50 m depth, especially greater impact than the East Sea in salinity. However, in the Yellow Sea, the influence of Argo floats tends to be restricted to the vicinity of Argo floats, because there was only one Argo float in the middle of the Yellow Sea during the experiment period. Given that the only limited number of Argo floats generally contribute in a positive way to the improvement of the GODAPS, further progress could be expected with adding more observations from Argo floats to current observing systems.
화염 라디칼 계측을 이용한 보일러의 실시간 능동 제어 시스템
추성호(Seongho Choo),이충환(Choong-Hwan Yi),신명철(Myung-Chul Shin),김세원(Se-Won Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
We have constructed a real-time active control system using a optical measurement for a middle or large size boiler system, perfomed experiments on a 40,000 ㎉/h furnace. This system is applying some radical information from the combution light as focusing wavelengths on CH, C2, and OH, so can intend more efficent with low pollution. In this paper, we show the system organization included a optic head, PMT sensors, a data acquisition system, a main control unit, a real-time control and data analysis program, and some valve actuators for the closed active control loop. And show chemiluminescence data on variable ratio of fuel and air. Being developed boiler system is performing on using gas, oil with or without reburn fuel. On this composite control system, we made efforts to find a more optimal control algorithm for high efficency with low pollutant emission like NOx.
추성호(Seongho Choo),이충환(Choong-Hwan Yi) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
This paper is for a Real-time Active Control System to operate a boiler. By sensing of flame we wanted to get status of a furnace as many as possible, like load, efficiency, and/or amount of pollutant. These data can be used to make optimal running point by controlling the ratio of air and fuel. So the last object is to make a closed actual control loop from optical head to valve controllers. The first job was to design and to develop a optical data acquisition system. including optical sensor module. And we gathered flame data in variable situations for taking the trend of flame against burning environment. Currently we are developing a general system model, designing some control strategy and testing this active control system.
추성호(Sung-Ho Choo),이주원(Joo-Won Lee),이우남(Woo-Nam Lee),김현홍(Hyun-Hong Kim),박종배(Jong-Bae Park),신중린(JoongRin-Shin) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
This paper presents the development method of educational simulator for Power System Analysis. The developed simulator can be made the students to model, analysis of power systems by drawing the system and performing the load flow, fault analysis by themselves under window environment. The simulator has developed by using the language based on XML(extensible Markup Language). Therefore, we determine that this simulator is useful to educate the load flow and fault analysis.