Simulation of ammonia combustion in dual-fuel compression-ignition engine

Jakub Lasocki , Mateusz Bednarski , Mieczysław Sikora

Abstract

Ammonia is regarded as an attractive alternative fuel for combustion engines with a great potential to replace currently used petroleum-based energy carriers. Its direct combustion does not result in emission of carbon dioxide and it can be produced from renewable sources. The energy density of ammonia is reasonable, it is relatively easy to store and has well established infrastructure for production, storage, handling and distribution. However, ammonia is corrosive to some materials, difficult to ignite due to high octane number and high autoignition temperature, and has low heating value. Therefore theoretical and experimental studies are needed to enhance the performance and expand the operating range of ammonia-fuelled engines. This study investigates the feasibility of introducing ammonia to dual-fuel compression-ignition engine, where a pilot dose of diesel oil initiates the ignition of ammonia-air mixture. Numerical simulations of the combustion process were carried out using a one-dimensional model, parametrized according to the specifications of a four-cylinder, turbocharged compression-ignition engine with conventional direct injection supply system, modified slightly for ammonia induction. The model was validated by comparison with empirically determined data. The simulations were performed for different combinations of ammonia-diesel oil ratios at various engine load. Ammonia was treated as an energy replacement for diesel oil. Engine performance and emissions of selected pollutants in dual-fuel operation mode were compared to that with diesel oil only. The results showed that different ammonia–diesel oil ratios can be used to achieve the same engine torque. A higher than rated power, depending on engine load conditions, can be obtained with the addition of an extra dose of ammonia. The influence of ammonia on the emissions of particular pollutants varied and was discussed in detail. Acquired combustion characteristics and engine performance parameters allow for a positive verification of the proposed model. The drawn conclusions may be useful for the development of dual-fuel engine control algorithms.
Author Jakub Lasocki (FACME / IV)
Jakub Lasocki,,
- Institute of Vehicles
, Mateusz Bednarski (FACME / IAE)
Mateusz Bednarski,,
- Institute of Automotive Engineering
, Mieczysław Sikora (FACME / IV)
Mieczysław Sikora,,
- Institute of Vehicles
Journal seriesIOP Conference Series: Earth and Environmental Science , ISSN , e-ISSN 1755-1315, (0 pkt)
Issue year2019
Vol214
Pages1-9
Publication size in sheets0.5
Conference2nd International Conference on the Sustainable Energy and Environment Development (SEED 2017), 14-11-2017 - 17-11-2017, Kraków, Polska
Keywords in EnglishAmmonia, combustion, dual-fuel engine, compression-ignition engine, simulation
DOIDOI:10.1088/1755-1315/214/1/012081
URL https://iopscience.iop.org/article/10.1088/1755-1315/214/1/012081
Languageen angielski
Score (nominal)5
ScoreMinisterial score = 5.0, 20-08-2019, ArticleFromJournal
Publication indicators WoS Citations = 0
Citation count*2 (2019-08-15)
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back