Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Disc Displacement Control of the Emergency Shut-Down Valve for LNG Bunkering

LNG 벙커링용 비상차단 밸브 디스크 변위 제어에 관한 연구

  • Yoon, Jin Ho (Department of Mechanical System Engineering, Graduate School, Pukyong National University) ;
  • Park, Ju Yeon (Engine & Machinery Business Unit Intelligent Control System Research Department, Researcher, HYUNDAI HEAVY INDUSTRIES) ;
  • Jang, Ji Seong (Department of Mechanical System Engineering, Pukyong National University)
  • Received : 2021.10.12
  • Accepted : 2021.11.01
  • Published : 2021.12.01
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Abstract

Among the currently available types of fuel, LNG emits a relatively small amount of nitrogen oxide and carbon dioxide when it burns in the engine. However, since LNG is a flammable material, leakage during bunkering can lead to accidents, such as fires. Therefore, it is necessary to install a remote operation emergency shut-down (ESD) valve to block the flow and leakage of LNG in an emergency situation that occurs during bunkering. The ESD valve uses a hydraulic driving device consisting of a hydraulic control valve and a hydraulic motor to control globe valve disc displacement, which regulates the flow path for LNG transfer. At this time, there are various nonlinearities in hydraulic driving devices; hence, it is necessary to design a controller with robust control performance against these uncertainties. In this study, modeling of the ESD valve was carried out, and a sliding mode controller to control the displacement of the globe valve disc was designed. As a result, it was confirmed that the designed control performance could be achieved by overcoming nonlinearity characteristics using the designed controller.

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Acknowledgement

이 논문은 부경대학교 자율창의학술연구비(2021년)에 의하여 연구되었음

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