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[학술강연] 전기전도도를 이용한 파울링 진단기술에 관한 연구
정경열(K.Y.Chung),이후락(H.R.Lee),문전수(J.S.Moon),이수태(S.T.Lee),류길수(K.S.Rhyu) 한국마린엔지니어링학회 2002 한국마린엔지니어링학회 학술대회 논문집 Vol.2002 No.-
Fouling causes serious maintenance problems on heat exchanger tubes and process facilities. To avoid such fouling problems, numerous efforts have been tried, e.g., diagnosis of fouling, reducing and eliminating the fouling, etc.. The objective of the present study is to develop an innovative diagnostic system of fouling, which can detect the scaling attached to the wall non-homogeneously. The performance of the diagnostic system has been evaluated with a scaling simulator that generates scaling on tested tube wall. The measured values with the diagnostic system were compared with the amounts of the scaling generated by the simulator.
Cnet 프로토콜을 이용한 PLC간의 다중무선통신 방법에 관한 연구
정경열(K.Y.Chung),이후락(H.R.Lee),장경선(K.S.Jhang),류길수(K.S.Ryu) 한국마린엔지니어링학회 2004 한국마린엔지니어링학회 학술대회 논문집 Vol.2004 No.-
This paper addresses the design and implementation of a wireless network, proposed as a cost-effective support platform for PLCs. With this network, one or more supervising stations may access remote equipment like PLCs. An applicable communication methods are described, capable of dealing with the peculiarities and contending system requirements. The paper specifies these requirements and indicates methods to fulfill them Also, it provides to the model of operation, and focuses on the implementation approach. The hardware and software design is described together with a number of critical points related to wireless communication on the Cnet<br/> Furthermore, a discussion on system expandability and performance is taking place and, finally, some observations are stated. The main conclusion is, that the proposed method can feature good performance under normal operating conditions, affordable cost<br/>
송치성(C.S.Song),정경열(K.Y.Chung),오상훈(S.H.Oh),이후락(H.R.Lee),이수태(S.T.Lee) 한국마린엔지니어링학회 2003 한국마린엔지니어링학회 학술대회 논문집 Vol.2003 No.-
The objective of the present study is to develop an innovative diagnostic and reduction system of fouling, which can detect and reduce fouling. We developed apparatuses by U-coefficient and ultrasonic methods for fouling reduction and diagnosis. The measured values with the diagnostic system was compared with the amounts of the scaling generated by the simulator