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Effects of EGR rates on combustion and emission characteristics in a diesel engine with n-butanol/PODE3-4/diesel blends

Huang, Haozhong; Li, Zhongju; Teng, Wenwen; Huang, Rong; Liu, Qingsheng; Wang, Yaodong

Effects of EGR rates on combustion and emission characteristics in a diesel engine with n-butanol/PODE3-4/diesel blends Thumbnail


Authors

Haozhong Huang

Zhongju Li

Wenwen Teng

Rong Huang

Qingsheng Liu



Abstract

An experimental investigation is conducted on the influence of EGR (Exhaust Gas Recirculation) rates (0–40%) on the combustion and emission characteristics of n-butanol/diesel/PODE3-4 blends at low-temperature combustion mode in diesel engine. The results show that at identical EGR rate, compared to D100 (diesel fuel), the peak values both of the mean cylinder pressure and the heat release rate of BD20 (20% butanol and 80% diesel in volume) are increased, ignition delay is extended, and the brake thermal efficiency is enhanced. Concerning BD20 blended with PODE3-4, the ignition delay is shortened, while both the brake thermal efficiency and the combustion efficiency increase. At the EGR rate below 30%, as the EGR rate grows, the effects on emission of soot, CO and HC are not significant, while the emission of NOx is sharply reduced; when the EGR rate is above 30%, as it grows, the emissions of soot, CO, and HC drastically rise. As EGR rate grows, the total particulate matter (PM) number concentrations of four fuels firstly decline and then rise, the total PM mass concentrations keep stable firstly and then rise drastically. As the proportion of added PODE3-4 in BD20 grows, the particle geometric mean diameters further decrease.

Citation

Huang, H., Li, Z., Teng, W., Huang, R., Liu, Q., & Wang, Y. (2019). Effects of EGR rates on combustion and emission characteristics in a diesel engine with n-butanol/PODE3-4/diesel blends. Applied Thermal Engineering, 146, 212-222. https://doi.org/10.1016/j.applthermaleng.2018.09.126

Journal Article Type Article
Acceptance Date Sep 27, 2018
Online Publication Date Sep 28, 2018
Publication Date Jan 5, 2019
Deposit Date Nov 4, 2019
Publicly Available Date Nov 7, 2019
Journal Applied Thermal Engineering
Print ISSN 1359-4311
Electronic ISSN 1873-5606
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 146
Pages 212-222
DOI https://doi.org/10.1016/j.applthermaleng.2018.09.126
Public URL https://durham-repository.worktribe.com/output/1285076

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