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Gas fuelled ship FGS system에 대한 폭발해석의 적용
김기평,강호근 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11
Nowadays in Korean Register of shipping (KR), the study for the gas fuelled ship is being conducted in point of ventilation efficiency. Ventilation capacity of FGS system is required at least 30 air changes per hour according to the requirement of Res. MSC. 285(86) for natural gas-fuelled engine installations. It says that is generally considered as gas leakage is occurred more likely from a machinery space for FGS system than others and the ventilation effect is very important item to keep its safety. The present requirement in Res.MSC.285(86) just, however considers only the ventilating capacity of air changes per hour. Hence, the problem of the current requirements is that may not expect effectively when the leak condition is over the requirements. Previous studies have therefore conducted for the purpose of safety evaluation about the dispersion and ventilation efficiency, after that on this paper, numerical prediction of explosion based on calculated natural gas concentration rate by CFD analysis is explained.
신경망과 유동전류계를 이용한 정수장 응집제 주입제어에 관한 연구
김기평,김용열,유준,강이석,Kim, Ki-Pyung,Kim, Yong-Yeol,Yoo, Jun,Kang, Yi-Seok 제어로봇시스템학회 2004 제어·로봇·시스템학회 논문지 Vol.10 No.6
Coagulation process is one of the most important processes in water treatment procedures for stable and economical operation, and coagulant dosing of this process for most plants is generally determined by the jar test. However, this method does not only take a long time to analyze and get the result but also has difficulties in applying to automatic control. This paper shows the feasibility of applying neural network to control the coagulant dosing automatically in water treatment plant. To be specific, the predicted results of the neural network model is shown to be similar to that of jar test. The input variables for learning the neural network are turbidity, water temperature, pH, and alkalinity. Combining the neural network and SCD(Streaming Current Detector) for feedforward and feedback control of injecting coagulant, a rapid change of the raw water quality can be accommodated.