Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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A Study on the Applicability of Ultrasonic to Improve Quality of Fuel Blended in Vessels

선내 제조된 혼합연료 품질 개선을 위한 초음파 적용 가능성에 관한 연구

  • Choi, Jung-Sik (Division of Marine Engineering & Coast guard, Mokpo National Maritime University) ;
  • Ju, Hae-Ji (Department of Marine Engineering, Graduate school, Mokpo National Maritime University) ;
  • Han, Won-Heui (Division of Maritime Engineering, Mokpo National Maritime University)
  • 최정식 (목포해양대학교 기관해양경찰학부) ;
  • 주해지 (목포해양대학교 대학원 기관시스템공학과) ;
  • 한원희 (목포해양대학교 기관시스템공학부)
  • Received : 2016.11.11
  • Accepted : 2017.02.25
  • Published : 2017.02.28
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Abstract

In this study, contributes to improving the state of this problem using cavitation by ultrasonic energy to reduce fuel costs, which take up a considerable part of ship operation costs, by making the use of on-board blended fuel oil more stable. An experiment simulating on-board blending methods was completed. Fuel (M.G.O & MF-180) was mixed at a volume ratio of 0.25:0.75 and, 0.75:0.25, and the effect of ultrasonic energy on blended fuel oil was examined after applying ultrasonic energy to blended fuel oil using an ultrasonic treatment unit. With the results, we confirmed the blending problem reported by vessels and residual carbon was reduced by up to 28.4%. In addition, based on the results for reduction of residual carbon content and dispersion stability, it was confirmed that the collapse pressure of the cavity due to the ultrasonic energy was effective to atomization of fuel particle and the temporary availability of mixed fuel containing a heavy fuel increased.

이 연구는 초음파 에너지의 공동현상(Cavitation)을 이용하여 선내 제조된 혼합연료유의 문제점을 개선하고 혼합연료유의 안정적인 사용이 가능하도록 하여 선박운용비의 상당부분을 차지하는 연료비를 절감하고자 한다. 실험은 선내 혼합연료유 제조 방식을 모사하여 선박용 연료유 M.G.O(Marine Gas Oil)와 MF-180(Marine Fuel-oil 180)를 각각 부피비 기준으로 0.25:0.75 및 0.75:0.25 비율로 혼합하였으며 초음파 처리장치를 이용하여 혼합연료유에 초음파 에너지를 직접 조사하여 초음파 에너지가 혼합연료유에 미치는 영향에 관해 고찰하였다. 실험결과, 선내 혼합유 제조시 보고되었던 문제점을 확인하였으며, 혼합시료유의 초음파 조사 후 잔류탄소량은 최대 28.4 % 감소하였다. 또한, 잔류탄소량 감소 및 분산 안정성 분석결과를 토대로 초음파 에너지에 의한 캐비티의 붕괴압이 연료입자 미립화에 효과가 있고, 중질연료유가 많이 함유된 혼합연료유의 일시적인 가용성을 높일 수 있을 것으로 판단되었다.

Keywords

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