Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

Predictions of the deteriorating performance for the marine diesel engines

선박용 디젤기관의 열화성능 예측에 관한 연구

  • Received : 2012.10.11
  • Accepted : 2013.01.02
  • Published : 2013.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

The higher energy efficiency for ship and the lower pollution for global environment are required strictly. However the performance of marine diesel engine is gradually deteriorated with time. And also the operation condition is varied with sea conditions. Hence the optimization for operating condition of marine engines is needed for energy saving and environment kindly. In this paper, it was attempted to investigate the influence of aging for marine diesel engine. The deterioration of engine performance is assessed by the calculation results of the simulation program for two-stroke marine diesel engine developed by author which was reported before. And three parameters for deterioration of engine performance were considered such as lower efficiency of turbocharger by fouling, increase of blow-by gas due to wear of cylinder liner and getting worse of combustion by poor injection. By the results, it was shown that the influence of engine performance by aging was relatively not so small - 10.4 bar low in Pmax and 3.2% decrease in Pmi.

최근 고유가 시대를 경험한 이후 에너지 수급에 대한 불안감이 증대됨과 동시에 지구온난화, 대기오염문제 등과 관련하여 대체에너지의 개발과 고효율 친환경 기술개발에 대한 요구가 강화되고 있다. 특히, IMO(국제해사기구)의 MEPC에서는 부속서 6을 $CO_2$의 규제법으로 하고자 하는 논의가 진행 중이다. 한편, 선박의 에너지효율을 향상시키고자 하는 다양한 기술들은 대부분 주로 새로운 기술의 개발과 신조선에의 적용에만 관심이 집중되고 있다. 그러나 선박기관은 일반적으로 장시간의 운항으로 그 성능은 점점 저하되고 운전조건 또한 변화되기 때문에 운항중인 기존선의 운항조건에 최적화된 기관의 운전관리야말로 친환경 및 고효율화 대책에 실질적이면서 매우 유익한 대책이 될 수 있다. 본 논문은 선박엔진의 성능저하정도를 정량적으로 예측하고자 하는 내용으로 엔진의 성능을 저하시키는 주요 인자들과 급기효율저하, 블로바이 가스증가 및 연료분사상태의 악화로 인한 연소악화 등이 엔진성능에 미치는 영향을 예측, 검토하였다.

Keywords

References

  1. J. S. Choi, K. H. Cho, and J. G. Nam, "An investigation on the performance improvement of marine diesel engines for existing ship," Proceedings of Advanced Maritime Engineering Conference (AMEC2008) and the 3rd Pan Asian Association of Maritime Engineering Societies (PAAMES) Forum, pp. 923-927, 2008.
  2. J. S. Choi, C. H. Jung, K. H. Cho, J. W. Lee, T. B. Ha, and H. S. Kim, "Performance simulation of Two-stroke marine diesel engines for existing ship," Proceedings of 8th International Symposium on Marine Engineering 2009, no. 194, 2009.
  3. J. S. Choi, C. H. Jeong, K. H. Cho, J. W. Lee, T. B. Ha, and H. S. Kim, "Development of simulation program of Two-stroke marine diesel engines," Journal of the Korean Society of Marine Engineering, vol. 34, no. 1, pp. 62-68, 2010 (in Korean). https://doi.org/10.5916/jkosme.2010.34.1.062
  4. C. H. Jeong, "Prediction of performance including gas flow system for Two-stroke marine diesel engines," Master's Thesis, Depart. of Marine Engineering, Korea Maritime University, Korea, 2010 (in Korean).
  5. MAN B&W Diesel A/S, Process Development, Meeting of Licensees - Copenhagen 2006, no. 7, 2006.
  6. Johan Schiemann, Operating Turbochargers, ABB Turbocharging Technical Information, 1992.
  7. MAN B&W Diesel A/S, Cylinder Condition, meeting of licensees - Copenhagen 2006, no. 9, 2006.
  8. J. I. Ramos, Internal Combustion Engine Modeling, Hemisphere Publishing Corporation. pp. 116, 1989.

Cited by

  1. A Study on the Development of Risk Assessment for Sunken Vessels Using Remaining-Fuel Estimations Model vol.22, pp.1, 2016, https://doi.org/10.7837/kosomes.2016.22.1.090
  2. The Effect of Rice Straw Mulching and No-Tillage Practice in Upland Crop Areas on Nonpoint-Source Pollution Loads Based on HSPF vol.8, pp.3, 2016, https://doi.org/10.3390/w8030106
  3. Evaluation of executable best management practices in Haean highland agricultural catchment of South Korea using SWAT vol.180, pp.2, 2013, https://doi.org/10.1016/j.agwat.2016.06.008