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Impact of diesel pilot distribution on the ignition process of a dual fuel medium speed marine engine

Garcia, Pablo LU ; Tunestål, Per LU ; Monsalve-Serrano, Javier; García, Antonio and Hyvönen, Jari LU (2017) In Energy Conversion and Management 149. p.192-205
Abstract

Recent emission legislation in the marine sector has emphasized the need to reduce nitrogen oxides (NOx) emissions as well as sulphur emissions. The fulfilment of emission legislation limits with conventional marine diesel oil (MDO) requires complex and expensive aftertreatment systems and in this framework lean burn pilot ignited dual fuel (diesel and natural gas) is revealed as one of the most suitable engine platforms to decrease pollutant formations at its source and therefore to mitigate aftertreatment system requirements. For this reason, an experimental study has been carried out in an 8.8 l dual fuel single cylinder Wärtsilä 20DF engine in order to evaluate different diesel equivalence ratio distributions in the... (More)

Recent emission legislation in the marine sector has emphasized the need to reduce nitrogen oxides (NOx) emissions as well as sulphur emissions. The fulfilment of emission legislation limits with conventional marine diesel oil (MDO) requires complex and expensive aftertreatment systems and in this framework lean burn pilot ignited dual fuel (diesel and natural gas) is revealed as one of the most suitable engine platforms to decrease pollutant formations at its source and therefore to mitigate aftertreatment system requirements. For this reason, an experimental study has been carried out in an 8.8 l dual fuel single cylinder Wärtsilä 20DF engine in order to evaluate different diesel equivalence ratio distributions in the combustion chamber and to get a deeper insight into the interaction between the high reactivity (diesel) and the low reactivity (natural gas) fuels during the ignition process. Engine testing has been complemented with diesel spray pattern simulations for a better understanding of local combustion conditions. Results show the importance of local pilot fuel distribution as a way to control combustion phasing and consequently its impact on combustion instability, emissions and knock conditions. Stable combustion with engine-out NOx levels below legislation have been achieved without the need of after-treatment system using appropriate high reactivity fuel (HRF) distribution control.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dual fuel, Mixing process, Natural gas, Pilot ignition
in
Energy Conversion and Management
volume
149
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:85024098269
ISSN
0196-8904
DOI
10.1016/j.enconman.2017.07.023
language
English
LU publication?
yes
id
7d1732eb-2c6a-4dd0-b617-b49fb6b44c21
date added to LUP
2017-07-27 08:55:15
date last changed
2017-07-27 08:55:15
@article{7d1732eb-2c6a-4dd0-b617-b49fb6b44c21,
  abstract     = {<p>Recent emission legislation in the marine sector has emphasized the need to reduce nitrogen oxides (NO<sub>x</sub>) emissions as well as sulphur emissions. The fulfilment of emission legislation limits with conventional marine diesel oil (MDO) requires complex and expensive aftertreatment systems and in this framework lean burn pilot ignited dual fuel (diesel and natural gas) is revealed as one of the most suitable engine platforms to decrease pollutant formations at its source and therefore to mitigate aftertreatment system requirements. For this reason, an experimental study has been carried out in an 8.8 l dual fuel single cylinder Wärtsilä 20DF engine in order to evaluate different diesel equivalence ratio distributions in the combustion chamber and to get a deeper insight into the interaction between the high reactivity (diesel) and the low reactivity (natural gas) fuels during the ignition process. Engine testing has been complemented with diesel spray pattern simulations for a better understanding of local combustion conditions. Results show the importance of local pilot fuel distribution as a way to control combustion phasing and consequently its impact on combustion instability, emissions and knock conditions. Stable combustion with engine-out NO<sub>x</sub> levels below legislation have been achieved without the need of after-treatment system using appropriate high reactivity fuel (HRF) distribution control.</p>},
  author       = {Garcia, Pablo and Tunestål, Per and Monsalve-Serrano, Javier and García, Antonio and Hyvönen, Jari},
  issn         = {0196-8904},
  keyword      = {Dual fuel,Mixing process,Natural gas,Pilot ignition},
  language     = {eng},
  month        = {10},
  pages        = {192--205},
  publisher    = {Elsevier},
  series       = {Energy Conversion and Management},
  title        = {Impact of diesel pilot distribution on the ignition process of a dual fuel medium speed marine engine},
  url          = {http://dx.doi.org/10.1016/j.enconman.2017.07.023},
  volume       = {149},
  year         = {2017},
}