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- 저자 : 신덕식(Duck S. Shin) (검색결과 2 건)
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수소충전소 압축기의 CBM+ 데이터수집을 위한 기술개발
오봉식(Bong S. Oh),신덕식(Duck S. Shin),이용훈(Yong H. Lee),장중순(Joong S. Jang) 한국신뢰성학회 2023 신뢰성응용연구 Vol.23 No.1
Purpose: This paper demonstrates Functional Safety Requirements by collecting and analyzing the condition-based maintenance (CBM+) data of the compressors such as chillers, compressors, and dispensers of a hydrogen refueling station (HRS) installation as well as HRS operation using power quality monitoring (PQM) instrumentation at the HRS input stage. Methods: Demonstrate fault measurement items and fault diagnosis such as sound, vibration, and current with CBM+. The feature extraction of the collected data in this process was analyzed using an LSTM AutoEncoder to demonstrate the occurrence of failures. Results: There were a total of 21 HRS accidents from 2005 to 2014 in Japan and 22 accidents in the US from 2004 to 2012. In particular, approximately 90% of the hydrogen gas leakage accidents in Japan and approximately 91% in the US were due to human error. The CBM+ of a hydrogen compressor was demonstrated by connecting a PQM instrument to the HRS input. Conclusion: A technically developed PQM measuring device was installed at the Gwangju HRS input power source and data was collected for approximately 3 months. After analyzing and evaluating the collected data through the LSTM AutoEncorder, it was demonstrated that HRS failure occurred after approximately 7 days. Therefore, we propose a failure detection and failure diagnosis model through the CBM+ of domestic HRSs.
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수소충전소 설비운영 안전관리 상용화를 위한 CBM+활용 방안 연구
오봉식(Bong S. Oh),신덕식(Duck S. Shin),이용훈(Yong H. Lee),장중순(Joong S. Jang) 한국신뢰성학회 2023 신뢰성응용연구 Vol.23 No.1
Purpose: This study aims to meet the functional safety requirements using condition-based maintenance plus (CBM+) to ensure the safe operation of equipment, such as chillers, compressors, and dispensers, used in hydrogen refueling facilities. Methods: For the commercialization of the safety management of hydrogen refueling stations, we demonstrate an approach for detecting equipment abnormalities during operation by measuring sound, vibration, and current. CBM+ is used for fault diagnosis; the results are compared with those of the traditional fault diagnosis methods. Results: At hydrogen refueling stations in South Korea, 90.48% of accidents occurred due to hydrogen leakage from 2005 to 2014. During the same period, 7 (31.82%) out of 22 such accidents were caused by human errors in the United States. Through structural analysis of vertical axis, lateral sides, and height of the hydrogen charging stations, we propose a method that uses sensor nodes, sensor systems, and communication systems for CBM+. Conclusion: Only a few empirical studies have reported the use of CBM+ for hydrogen refueling stations in South Korea. Effective strategies for CBM+ have also not been presented. Through technical research and institutional improvement, including this study, it is necessary to secure functional safety and PHM technology for CBM for the safe operation of hydrogen refueling stations in South Korea. In addition, data based on several factors, including the equipment component type, failure, and safety risk level, must be acquired in a standard format. However, to eliminate the safety risks of hydrogen refueling stations, hydrogen leakage accidents must be primarily avoided.
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