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Numerical investigation of the application of Miller cycle and low-carbon fuels to increase diesel engine efficiency and reduce emissions

Roper, Edward; Wang, Yaodong; Zhang, Zhichao

Numerical investigation of the application of Miller cycle and low-carbon fuels to increase diesel engine efficiency and reduce emissions Thumbnail


Authors

Edward Roper

Zhichao Zhang



Abstract

In this paper, validated simulations using Ricardo WAVE have been performed to investigate the effect of the Miller cycle and low-carbon fuels on the performance (power, torque, BTE and BSFC) and emissions of a diesel engine. The results show that the increased Miller cycle effect (larger deviation of the advanced or retarded intake valve closing from the standard intake valve closing time) will decrease NOx, CO and HC emissions, and slightly improve Brake Thermal Efficiency (BTE) and Brake Specific Fuel Consumption (BSFC) with slight loss in engine performance and increase in soot emissions. An engine running B0 (diesel with 0% Biodiesel in the blend) with a −18% Miller cycle effect has a reduction in NOx of 9% and CO of 4.3% with a decrease of 1.6% in power at the rated engine speed. Using low carbon fuels drastically reduces emissions with reduced BTE and increased BSFC. When used in conjunction, the Miller cycle and low-carbon fuels have an improved effect on both performance and emissions. The optimal results demonstrate that using B60 (60% Biodiesel in the blend) and a −8% Miller effect contributes to a 1.5% improvement in power, 1.2% in BTE, 13.3% in NOx, 38.5% in CO, 8.9% in HC, and 33.0% in soot at a cost of 6.0% increase in BSFC. The results show that it is an easy way to reduce NOx, CO, HC and soot emissions and increase the BTE of the engine by combining Miller cycle and low-carbon fuels.

Citation

Roper, E., Wang, Y., & Zhang, Z. (2022). Numerical investigation of the application of Miller cycle and low-carbon fuels to increase diesel engine efficiency and reduce emissions. Energies, 15(5), Article 1783. https://doi.org/10.3390/en15051783

Journal Article Type Article
Acceptance Date Feb 23, 2022
Online Publication Date Feb 28, 2022
Publication Date Mar 1, 2022
Deposit Date Feb 24, 2022
Publicly Available Date Mar 28, 2024
Journal Energies
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 15
Issue 5
Article Number 1783
DOI https://doi.org/10.3390/en15051783

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Accepted Journal Article (718 Kb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.





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