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Effect of Nitrogen Injection Pressure on Lqiufied Engine Performance

질소 분사 압력이 액화질소 엔진의 성능 특성에 미치는 영향

  • Shin, Donggil (Department of Engine Research, Korea Institute of Machinery & Materials)
  • Received : 2016.10.31
  • Accepted : 2017.01.13
  • Published : 2017.03.31

Abstract

A liquid nitrogen engine is a highly clean power engine, which does not emit any hazardous substances in its fumes. Additionally, it has an advantage over electric vehicles, as its energy density is larger than that of a battery. The use of an existing liquid nitrogen engine is typically limited to the reciprocation type. In this study, the concept of a nitrogen engine equipped with a scroll expander is introduced. The engine's efficiency was shown to increase when the scroll expander was utilized in the engine, while also adding to the simplification of the structure. Therefore, compared to the existing reciprocation-type engine, the engine with the scroll expander has the potential to be both technically and economically more competitive. In this study, the performance of a liquid nitrogen engine equipped with a scroll expander was analyzed while altering the injection pressure profile of liquid nitrogen.

액화질소 엔진은 유해 배출물질을 전혀 배출하지 않는 고청정 동력기관이며, 에너지 밀도면에서 배터리에 비해 크기 때문에 전기자동차에 대한 경쟁력을 가지고 있다. 기존의 액화질소 엔진은 주로 왕복동 방식에 국한되어 왔다. 본 논문에서는 스크롤 팽창기를 적용하는 액화질소 엔진의 개념을 도입하였다. 스크롤 팽창기를 엔진에 적용할 경우 엔진 효율이 증가할 수 있고, 구조의 단순화 구현이 가능하여 기존 왕복동 방식 엔진에 비해 기술적, 경제적 경쟁력을 가질 수 있다. 본 연구에서는 액체 질소 분사압력을 변화시키면서 스크롤 팽창기가 적용된 액화질소 엔진의 성능을 분석하였다.

Keywords

References

  1. Knowlen, C., Williams, J., Mattick, A., Deparis, H., Hertzberg, A. "Quasi-Isothermal Expansion Engines for Liquid Nitrogen Automotive Propulsion", SAE 972649, 1997
  2. Knowlen, C., Mattick, A., Bruckner A.P., Hertzberg, A. "High Efficiency Energy Conversion Systems for Liquid Nitrogen Automobiles", SAE 981898, 1998
  3. Ahmad, A., Al-Dadah, R., Mahmoud, S.,"Liquid nitrogen energy storage for air conditioning and power generation in domestic applications", Energy Conversion and Management, Vol 128, pp34-43, 2016. https://doi.org/10.1016/j.enconman.2016.09.063
  4. Ordonez CA, Plummer MC., "Cold thermal storage and cryogenic heat engines for energy storage applications", Energy Sources, 19(4):pp389-96.1997. https://doi.org/10.1080/00908319708908858
  5. Ordonez CA, Plummer MC, Reidy RF, "Cryogenic heat engines for powering zero emission vehicles", In: Proceedings of 2001 ASME international mechanical engineering congress and exposition, US, IMECE 2001 Nov 11.
  6. Youngmin Kim, Dongkil Shin, Janghee Lee, Kwenha Park, "Noble Stirling Engine Employing Scroll Mechanism", Proceedings of the 11th International Stirling Engine Conference, pp. 67-75, 2003.
  7. Richard E. Sonntag, Introduction to Thermodynamics, 1982.
  8. Hong, G. D., 2002, The experimental studies of vacuum residue combustion in a small scale reactor, KOSEE, Vol. 6, No. 2, pp. 19-30