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Effects of secondary combustion on efficiencies and emission reduction in the diesel engine exhaust heat recovery system

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  • Lee, Dae Hee
  • Lee, Jun Sik
  • Park, Jae Suk

Abstract

An experimental study on the effects of secondary combustion on efficiencies and emission reduction in the diesel engine exhaust heat recovery system has been undertaken. The co-generation concept is utilized in that the electric power is produced by the generator connected to the diesel engine, and heat is recovered from both combustion exhaust gases and the engine by the fin-and-tube and shell-and-tube heat exchangers, respectively. A specially designed secondary combustor is installed at the engine outlet in order to reburn the unburned fuel from the diesel engine, thereby improving the system's efficiency as well as reducing air pollution caused by exhaust gases. The main components of the secondary combustor are coiled Nichrome wires heated by the electric current and diesel oxidation catalyst (DOC) housed inside a well insulated stainless steel shell. The performance tests were conducted at four water flow rates of 5, 10, 15 and 20Â L/min and five electric power outputs of 3, 5, 7, 9 and 11Â kW. The results show that at a water flow of 20Â L/min and a power generation of 9Â kW, the total efficiency (thermal efficiency plus electric power generation efficiency) of this system reaches a maximum 94.4% which is approximately 15-20% higher than that of the typical diesel engine exhaust heat recovery system. Besides, the use of the secondary combustor and heat exchangers results in 80%, 35% and 90% reduction of carbon monoxide (CO), nitrogen oxide (NOx) and particulate matter (PM), respectively.

Suggested Citation

  • Lee, Dae Hee & Lee, Jun Sik & Park, Jae Suk, 2010. "Effects of secondary combustion on efficiencies and emission reduction in the diesel engine exhaust heat recovery system," Applied Energy, Elsevier, vol. 87(5), pages 1716-1721, May.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:5:p:1716-1721
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    References listed on IDEAS

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    Cited by:

    1. Gang Wu & Guoda Feng & Yuelin Li & Tao Ling & Xuejun Peng & Zhilai Su & Xiaohuan Zhao, 2024. "A Review of Thermal Energy Management of Diesel Exhaust after-Treatment Systems Technology and Efficiency Enhancement Approaches," Energies, MDPI, vol. 17(3), pages 1-32, January.
    2. Fu, Jianqin & Liu, Jingping & Feng, Renhua & Yang, Yanping & Wang, Linjun & Wang, Yong, 2013. "Energy and exergy analysis on gasoline engine based on mapping characteristics experiment," Applied Energy, Elsevier, vol. 102(C), pages 622-630.
    3. Pandiyarajan, V. & Chinnappandian, M. & Raghavan, V. & Velraj, R., 2011. "Second law analysis of a diesel engine waste heat recovery with a combined sensible and latent heat storage system," Energy Policy, Elsevier, vol. 39(10), pages 6011-6020, October.
    4. Zhang, Bin & E, Jiaqiang & Gong, Jinke & Yuan, Wenhua & Zuo, Wei & Li, Yu & Fu, Jun, 2016. "Multidisciplinary design optimization of the diesel particulate filter in the composite regeneration process," Applied Energy, Elsevier, vol. 181(C), pages 14-28.
    5. E, Jiaqiang & Zhao, Xiaohuan & Liu, Guanlin & Zhang, Bin & Zuo, Qingsong & Wei, Kexiang & Li, Hongmei & Han, Dandan & Gong, Jinke, 2019. "Effects analysis on optimal microwave energy consumption in the heating process of composite regeneration for the diesel particulate filter," Applied Energy, Elsevier, vol. 254(C).
    6. Barelli, L. & Barluzzi, E. & Bidini, G., 2011. "Modeling of a 1Â MW cogenerative internal combustion engine for diagnostic scopes," Applied Energy, Elsevier, vol. 88(8), pages 2702-2712, August.
    7. Wei, Haiqiao & Zhu, Tianyu & Shu, Gequn & Tan, Linlin & Wang, Yuesen, 2012. "Gasoline engine exhaust gas recirculation – A review," Applied Energy, Elsevier, vol. 99(C), pages 534-544.
    8. Jiang, Jibing & Li, Dinggen, 2016. "Theoretical analysis and experimental confirmation of exhaust temperature control for diesel vehicle NOx emissions reduction," Applied Energy, Elsevier, vol. 174(C), pages 232-244.
    9. Rachtan, W. & Malinowski, L., 2013. "An approximate expression for part-load performance of a microturbine combined heat and power system heat recovery unit," Energy, Elsevier, vol. 51(C), pages 146-153.
    10. Pandiyarajan, V. & Chinna Pandian, M. & Malan, E. & Velraj, R. & Seeniraj, R.V., 2011. "Experimental investigation on heat recovery from diesel engine exhaust using finned shell and tube heat exchanger and thermal storage system," Applied Energy, Elsevier, vol. 88(1), pages 77-87, January.
    11. Dilip, K.V. & Vasa, Nilesh J. & Carsten, Kopp & Ravindra, K.U., 2011. "Incineration of diesel particulate matter using induction heating technique," Applied Energy, Elsevier, vol. 88(3), pages 938-946, March.

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