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Comparative first- and second-law parametric study of transient diesel engine operation

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  • Rakopoulos, C.D.
  • Giakoumis, E.G.

Abstract

A computer model is developed for studying the first- and second-law (availability) balances of a turbocharged diesel engine, operating under transient load conditions. Special attention is paid to the direct comparison between the results from the two laws, for various operating parameters of the engine. The model simulates the transient operation on a degree crank angle basis, using a detailed analysis of mechanical friction, a separate consideration for the processes of each cylinder during a cycle (“multi-cylinder” model) and a mathematical model of the fuel pump. Experimental data taken from a marine duty, turbocharged diesel engine, located at the authors’ laboratory, are used for the evaluation of the model's predictive capabilities. The first-law (e.g., engine speed, fuel pump rack position, engine load, etc.) and second-law (e.g., irreversibilities, heat loss and exhaust gases) terms for the diesel engine cylinder are both computed and depicted in comparison, using detailed diagrams, for various engine operating parameters. It is revealed that, at least for the specific engine type and operation, a thermodynamic, dynamic or design parameter can have a conflicting impact on the engine transient response as regards energy and availability properties, implying that both a first- and second-law optimization is needed for best performance evaluation.

Suggested Citation

  • Rakopoulos, C.D. & Giakoumis, E.G., 2006. "Comparative first- and second-law parametric study of transient diesel engine operation," Energy, Elsevier, vol. 31(12), pages 1927-1942.
    • Handle: RePEc:eee:energy:v:31:y:2006:i:12:p:1927-1942
    DOI: 10.1016/j.energy.2005.10.022
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    References listed on IDEAS

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    1. Nakonieczny, K., 2002. "Entropy generation in a diesel engine turbocharging system," Energy, Elsevier, vol. 27(11), pages 1027-1056.
    2. Caton, Jerald A, 2000. "On the destruction of availability (exergy) due to combustion processes — with specific application to internal-combustion engines," Energy, Elsevier, vol. 25(11), pages 1097-1117.
    3. Rakopoulos, C.D. & Giakoumis, E.G., 1997. "Simulation and exergy analysis of transient diesel-engine operation," Energy, Elsevier, vol. 22(9), pages 875-885.
    4. Rakopoulos, C.D. & Giakoumis, E.G., 2004. "Availability analysis of a turbocharged diesel engine operating under transient load conditions," Energy, Elsevier, vol. 29(8), pages 1085-1104.
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    Cited by:

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    4. Ma, Zetai & Zhang, Kun & Xiang, Hanchun & Gu, Jie & Yang, Mingyang & Deng, Kangyao, 2023. "Experimental study on influence of high exhaust backpressure on diesel engine performance via energy and exergy analysis," Energy, Elsevier, vol. 263(PB).
    5. Hongqing, Feng & Huijie, Li, 2010. "Second-law analyses applied to a spark ignition engine under surrogate fuels for gasoline," Energy, Elsevier, vol. 35(9), pages 3551-3556.
    6. Mahabadipour, Hamidreza & Srinivasan, Kalyan K. & Krishnan, Sundar R., 2017. "A second law-based framework to identify high efficiency pathways in dual fuel low temperature combustion," Applied Energy, Elsevier, vol. 202(C), pages 199-212.
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