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배징도(JingDo BAE),최주형(JooHyung CHOI),김정환(JeongHwan KIM),김도형(DoHyung KIM),오세준(SeJoon OH) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
HIPPS(High Integrity Pressure Protection System) is installed in front of major equipment of plant system including offshore plant such as separator to prevent failure and accident caused by abnormal pressure. This is a pressure control safety system that replaced ESDV(Emergency Shutdown Valve) and EVV(Emergency Venting Valve) and guarantees high stability. If abnormal pressure is detected on the sensors installed in front of the major equipment, the system should close the valve within the minimum required time. In this study, the operation of driving part for HIPPS is visualized by simulating to improve understanding for the behavior of HIPPS when abnormal pressure is detected.
이재훈(Jae-Hoon Lee),최주형(JooHyung Choi),김정환(JeongHwan Kim),김정렬(Jeong-Ryul Kim),박성현(Sung-Hyun Park) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
A high integrity pressure protection system(HIPPS) is a kind of safety system to prevent over pressurization of onshore and offshore plant. The role of HIPPS is to shut off the source of the high pressure rapidly before exceeding design pressure of a system, therefore important equipments linked on pipe line can be protected by high pressure. HIPPS is consist of three parts, sensors to detect the hight pressure, a logic solver to process input pressure from sensors and final elements to perform actual shutting off action to the source of overpressure. The main devices of final element are valve and actuator, and performance of actuator is very important for rapid response of HIPPS. The actuator must have high structural reliability to maintain the performance under rapid shutting off motion. This study address the evaluation and improvement of structural stability of actuator design by using finite element method(FEM).
전산 해석을 이용한 해양플랜트용 Flexible barrier 거동 분석
배징도(Jingdo BAE),최주형(Joohyung CHOI),김정환(Junghwan KIM),허태욱(Taewook HUH),김동훈(Donghoon KIM) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The flexible safety barrier is used to protect the important equipments and workers from crash when some objects are transferred by crane in offshore plants, such as the jack-up, drill ship, semi rig, FPSO. In this study, to verify the impact performance of the new developed aluminum flexible barrier with own technology, the impact scenarios are established and spring capacity is defined. The spring capacity is determined for satisfying criteria 14 degree of the rotation angle of the column for barrier.
김지선(Jisun Kim),배징도(Jingdo Bae),최주형(Joohyung Choi),장진우(Jinwoo Jang),김휘(Hwi Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
The runner is a wheel that is located in the reaction water turbine and receives water energy to rotate. The runner consists of a blade, a crown, and a band, and the blade is welded to the crown or band. In this study, we propose a method of evaluating the residual stress that occurs when a blade inside a turbine runner is welded to a crown or band. The volume of the bead was modeled by estimating the bead accumulation with time, and the heat transfer analysis was performed with respect to the welding process. The structural analysis was performed using the temperature of the heat transfer analysis as the structure temperature. Finally, the residual stress generated in the structure during welding was confirmed and evaluated.
전산유체해석을 활용한 플레어 시스템용 녹아웃드럼의 성능 평가
이재훈(Jae-Hoon Lee),김한울(Han Ul Kim),최주형(JooHyung Choi),허태욱(TaeUk Heo),김명환(Myoung Hwan Kim),황태규(Tae Gyu Hwang),공길영(Gil-Young Kong) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
In this study, it is described as a method for evaluating the performance of knock out drum that is applied to the flare system for offshore plants and used to deactivate the residual gas from oil wells. The droplets inside of residual gas should be removed before the gas is sent to flare tip for the safety of an offshore platform. In order to verify whether the knock out drum can remove droplets of a certain size or larger, the internal flow of knock out drum is analyzed using the particle tracking method of CFD technique. The ratio of the removed droplet was evaluated and through this confirms the design suitability for the performance of the knock out drum.