Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Shape Design of the 3-Way Valve used in Marine Diesel Engines (LDCL JWCS) by CFD Analysis

유동해석을 통한 선박용 디젤엔진(LDCL JWCS)의 3-Way Valve 형상 설계

  • Hwang, Gi Ung (Dept. Mechanical Convergence Technology, Pusan Nat'l Univ.) ;
  • Kwak, Hyo Seo (Research Institute of Mechanical Technology, Pusan Nat'l Univ.) ;
  • Kim, Jae Yeol (Dept. Mechanical Convergence Technology, Pusan Nat'l Univ.) ;
  • Eom, Tae Jin (Dept. Mechanical Convergence Technology, Pusan Nat'l Univ.) ;
  • Kim, Chul (School of Mechanical Engineering, Pusan Nat'l Univ.)
  • 황기웅 (부산대학교 기계융합기술학과) ;
  • 곽효서 (부산대학교 기계기술연구원) ;
  • 김재열 (부산대학교 기계융합기술학과) ;
  • 엄태진 (부산대학교 기계융합기술학과) ;
  • 김철 (부산대학교 기계공학부)
  • Received : 2017.05.16
  • Accepted : 2017.07.31
  • Published : 2017.11.01
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Abstract

Camshaft engines designed for constant engine loads have been applied to existing marine diesel engines. However, due to environmental regulations, electro-hydraulic servo mechanisms, which have a loaddependent cylinder liner jacket water cooling system (LDCL-JWCS), have been recently developed to individually control the temperature of the cylinders depending on the engine load. In this system, the 3-way valve, which prevents low temperature corrosion by reducing the temperature difference between the upper and lower parts of the cylinder, has been employed, but the outlet mass flow of the existing valve is low. In this study, the design of the internal shape of the 3-way valve was performed by analyzing the effects of the design parameters of the valve shape on the performance (i.e., the outlet mass flow rate and temperature). The proposed model was verified by comparing its performance to that of existing marine diesel engine valves.

기존의 선박용 디젤 엔진에는 항상 일정한 엔진 부하량을 유지하는 캠 구동장치가 적용되고 있었으나, 최근 환경규제로 인하여 엔진 부하량에 따라 실린더 온도를 개별적으로 제어하는 LDCL(Load dependent cylinder liner) JWCS(Jacket water cooling system)가 적용된 전자유압 제어방식이 개발되었다. 이 시스템에서 3-way 밸브는 실린더의 상부와 하부와의 온도 차이를 줄여 저온부식을 방지하는데, 대부분 수입에 의존하고 있으며 토출유량이 낮다. 이에 본 연구에서는 3-way 밸브 내부 형상 관련 설계인자가 성능(토출 유량 및 온도)에 미치는 영향을 파악하여 밸브의 형상 설계를 수행하였으며, 기존 모델과의 성능 비교를 통해 제안된 밸브의 우수성을 검증하였다.

Keywords

References

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