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Comparative analysis and evaluation of turbocharged Dual and Miller cycles under different operating conditions

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  • Zhu, Sipeng
  • Deng, Kangyao
  • Liu, Sheng
  • Qu, Shuan

Abstract

In this paper, an accurate turbocharged Dual cycle model integrating the pumping process is proposed with all the assumptions of an air-standard cycle are relaxed. Effects of the turbine cross section, turbocharger efficiency, excess air coefficient, load and wastegate on the turbocharged Dual cycle are investigated based on a calibrated diesel engine model in Matlab software. The Miller cycle under different turbocharger matching conditions is compared with the original turbocharged Dual cycle. The results show that there exists an optimum excess air coefficient for the indicated efficiency of the turbocharged Dual cycle when considering the pumping process, and the optimum value increases with the increase of the turbocharger efficiency and the decrease of the engine load. With the wastegate, the amount of intake air can be restricted, and variations of the indicated efficiency depend on the turbocharger matching. The exclusive adoption of the Miller cycle can only increase the engine performance when the original matched turbine has a small cross section. The Miller cycle always needs a high efficiency turbocharger with a small size turbine and a more efficient charge air cooler to realize the low temperature cycle and guarantee the fuel economy at the same time.

Suggested Citation

  • Zhu, Sipeng & Deng, Kangyao & Liu, Sheng & Qu, Shuan, 2015. "Comparative analysis and evaluation of turbocharged Dual and Miller cycles under different operating conditions," Energy, Elsevier, vol. 93(P1), pages 75-87.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p1:p:75-87
    DOI: 10.1016/j.energy.2015.09.028
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    References listed on IDEAS

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    1. Mikalsen, R. & Wang, Y.D. & Roskilly, A.P., 2009. "A comparison of Miller and Otto cycle natural gas engines for small scale CHP applications," Applied Energy, Elsevier, vol. 86(6), pages 922-927, June.
    2. Lin, Jiann-Chang & Hou, Shuhn-Shyurng, 2007. "Influence of heat loss on the performance of an air-standard Atkinson cycle," Applied Energy, Elsevier, vol. 84(9), pages 904-920, September.
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    4. Gonca, Guven & Sahin, Bahri & Ust, Yasin, 2013. "Performance maps for an air-standard irreversible Dual–Miller cycle (DMC) with late inlet valve closing (LIVC) version," Energy, Elsevier, vol. 54(C), pages 285-290.
    5. Al-Sarkhi, A. & Jaber, J.O. & Probert, S.D., 2006. "Efficiency of a Miller engine," Applied Energy, Elsevier, vol. 83(4), pages 343-351, April.
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    Cited by:

    1. Zhu, Sipeng & Liu, Sheng & Qu, Shuan & Deng, Kangyao, 2017. "Thermodynamic and experimental researches on matching strategies of the pre-turbine steam injection and the Miller cycle applied on a turbocharged diesel engine," Energy, Elsevier, vol. 140(P1), pages 488-505.
    2. Gonca, Guven, 2016. "Comparative performance analyses of irreversible OMCE (Otto Miller cycle engine)-DiMCE (Diesel miller cycle engine)-DMCE (Dual Miller cycle engine)," Energy, Elsevier, vol. 109(C), pages 152-159.
    3. Xu, Guangfu & Jia, Ming & Li, Yaopeng & Xie, Maozhao & Su, Wanhua, 2017. "Multi-objective optimization of the combustion of a heavy-duty diesel engine with low temperature combustion (LTC) under a wide load range: (II) Detailed parametric, energy, and exergy analysis," Energy, Elsevier, vol. 139(C), pages 247-261.
    4. Zhu, Sipeng & Gu, Yuncheng & Yuan, Hao & Ma, Zetai & Deng, Kangyao, 2020. "Thermodynamic analysis of the turbocharged marine two-stroke engine cycle with different scavenging air control technologies," Energy, Elsevier, vol. 191(C).
    5. Mousapour, Ashkan & Hajipour, Alireza & Rashidi, Mohammad Mehdi & Freidoonimehr, Navid, 2016. "Performance evaluation of an irreversible Miller cycle comparing FTT (finite-time thermodynamics) analysis and ANN (artificial neural network) prediction," Energy, Elsevier, vol. 94(C), pages 100-109.
    6. Zhao, Jinxing, 2017. "Research and application of over-expansion cycle (Atkinson and Miller) engines – A review," Applied Energy, Elsevier, vol. 185(P1), pages 300-319.
    7. Gonca, Guven & Sahin, Bahri & Parlak, Adnan & Ayhan, Vezir & Cesur, Idris & Koksal, Sakip, 2017. "Investigation of the effects of the steam injection method (SIM) on the performance and emission formation of a turbocharged and Miller cycle diesel engine (MCDE)," Energy, Elsevier, vol. 119(C), pages 926-937.

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