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Analysis of Exhaust Gas Recirculation (EGR) effects on exergy terms in an engine operating with diesel oil and hydrogen

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  • Jafarmadar, Samad
  • Nemati, Peyman

Abstract

Despite the fact that the high diffusivity of hydrogen in air leads to the fast mixing and homogeneous premixed mixture, it is not suitable for operation as a single fuel because it needs a high temperature to reach self-ignition; moreover, its operation results in knocking. In this study, a Deutz dual fuel (operation with diesel oil and hydrogen) was used and from the view point of second law the effects of EGR introduction was investigated. The fuel injection amount and gas fuel-air ratio were kept constant in 6.48 mg/cycle and øH2 = 0.3, respectively. For combustion simulation and exergetic analyses, the Extend Coherent Flame Model-Three Zone model (ECFM-3Z) and a FORTRAN-based code were used, respectively. For four EGR mass fraction cases (i.e. 0%, 10%, 20%, and 30%) the rate and accumulation of various exergy terms were calculated. The results showed that as EGR introduction increases from 0% to 30%, the exergy efficiency decreases from 42.4% to 14.1%. Furthermore, the value of exhaust loss exergy increases from 14.9% to 56.7% of the mixture fuel chemical exergy. The results of the current study were compared with those existing in the relevant literature, and an acceptable behavior was observed.

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  • Jafarmadar, Samad & Nemati, Peyman, 2017. "Analysis of Exhaust Gas Recirculation (EGR) effects on exergy terms in an engine operating with diesel oil and hydrogen," Energy, Elsevier, vol. 126(C), pages 746-755.
    • Handle: RePEc:eee:energy:v:126:y:2017:i:c:p:746-755
    DOI: 10.1016/j.energy.2017.03.030
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    References listed on IDEAS

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    1. Chintala, Venkateswarlu & Subramanian, K.A., 2014. "Assessment of maximum available work of a hydrogen fueled compression ignition engine using exergy analysis," Energy, Elsevier, vol. 67(C), pages 162-175.
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    3. Jafarmadar, Samad, 2014. "Multidimensional modeling of the effect of EGR (exhaust gas recirculation) mass fraction on exergy terms in an indirect injection diesel engine," Energy, Elsevier, vol. 66(C), pages 305-313.
    4. Sahoo, Bibhuti B. & Saha, Ujjwal K. & Sahoo, Niranjan, 2011. "Theoretical performance limits of a syngas–diesel fueled compression ignition engine from second law analysis," Energy, Elsevier, vol. 36(2), pages 760-769.
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    Cited by:

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    2. Rakopoulos, Dimitrios C. & Rakopoulos, Constantine D. & Kosmadakis, George M. & Giakoumis, Evangelos G., 2020. "Exergy assessment of combustion and EGR and load effects in DI diesel engine using comprehensive two-zone modeling," Energy, Elsevier, vol. 202(C).
    3. M Krishnamoorthi & R Malayalamurthi, 2018. "Effect of exhaust gas recirculation and charge inlet temperature on performance, combustion, and emission characteristics of diesel engine with bael oil blends," Energy & Environment, , vol. 29(3), pages 372-391, May.
    4. Xianghuan Zu & Chuanlei Yang & Hechun Wang & Yinyan Wang, 2018. "An EGR performance evaluation and decision-making approach based on grey theory and grey entropy analysis," PLOS ONE, Public Library of Science, vol. 13(1), pages 1-15, January.
    5. Zhaojie Shen & Wenzheng Cui & Xiaodong Ju & Zhongchang Liu & Shaohua Wu & Jianguo Yang, 2018. "Numerical Investigation on Effects of Assigned EGR Stratification on a Heavy Duty Diesel Engine with Two-Stage Fuel Injection," Energies, MDPI, vol. 11(3), pages 1-14, February.
    6. Bahman Najafi & Sina Faizollahzadeh Ardabili & Amir Mosavi & Shahaboddin Shamshirband & Timon Rabczuk, 2018. "An Intelligent Artificial Neural Network-Response Surface Methodology Method for Accessing the Optimum Biodiesel and Diesel Fuel Blending Conditions in a Diesel Engine from the Viewpoint of Exergy and," Energies, MDPI, vol. 11(4), pages 1-18, April.
    7. Yuan, Chenheng & Liu, Yang & Han, Cuijie & He, Yituan, 2019. "An investigation of mixture formation characteristics of a free-piston gasoline engine with direct-injection," Energy, Elsevier, vol. 173(C), pages 626-636.
    8. Yuan, Zhipeng & Fu, Jianqin & Liu, Qi & Ma, Yinjie & Zhan, Zhangsong, 2018. "Quantitative study on influence factors of power performance of variable valve timing (VVT) engines and correction of its governing equation," Energy, Elsevier, vol. 157(C), pages 314-326.

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