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Developing an improved water discharge anchor & trap bolt to prevent basic salt penetration to harbor structures

해수 염기 침투방지를 위한 성능개선 형 물배출 앵커 및 트랩볼트 개발에 관한 연구

  • Ock, Jong-Ho (Department of Architectural Engineering, Seoul National University of Science & Technology) ;
  • Moon, Sang-Deok (Department of Architectural Engineering, Seoul National University of Science & Technology) ;
  • Lee, Hwa-Sun (MT Master) ;
  • Shin, Kyung-Soo (Department of Architectural Engineering, Seoul National University of Science & Technology)
  • 옥종호 (서울과학기술대학교 건축학부) ;
  • 문상덕 (서울과학기술대학교 건축학부) ;
  • 이화선 (주식회사 엠티마스타) ;
  • 신경수 (서울과학기술대학교 건축학부)
  • Received : 2018.01.19
  • Accepted : 2018.04.06
  • Published : 2018.04.30

Abstract

Large industrial motors require a large area because of the high risk of shutdown accidents and large industrial accidents due to the lowering of the dielectric strength of the armature windings and overheating problems. Therefore, there is a demand for a large-capacity motor that has small size, light weight, and excellent dielectric strength compared with conventional motors. Superconducting motors have advantages of high efficiency and output power, low size, low weight, and improved stability. This results from greatly increasing the magnetic field generation by using superconductive field coils in rotating machines such as generators and motors. It is very important to design and analyze the cooling system to lower the critical temperature of the wires to achieve superconducting performance. In this study, a field loss analysis and low-temperature heat transfer analysis of the cooling system were performed through the conceptual design of a 100-HP high-temperature superconducting synchronous motor. The field loss analysis shows that a uniform pore magnetic flux density appears when high-temperature superconducting wire is used. The low-temperature heat transfer analysis for gaseous neon and liquid neon showed that a flow rate of 1 kg/min of liquid neon is suitable for maintaining low-temperature stability of the high-temperature superconducting wire.

Keywords

Corrosion;Harbor Structure;Repair and Reinforcement;Trap Bolt;Water Discharge

Acknowledgement

Supported by : 서울과학기술대학교

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