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Comparative analysis of the heat balance results of the selected Tier III-compliant gas-fuelled two-stroke main engines
| 1 | Doctoral School of the Maritime University of Szczecin, Maritime University of Szczecin, Poland |
CORRESPONDING AUTHOR
Piotr Kamil Korlak
Doctoral School of the Maritime University of Szczecin, Maritime University of Szczecin, Poland
Doctoral School of the Maritime University of Szczecin, Maritime University of Szczecin, Poland
Submission date: 2022-09-04
Final revision date: 2022-11-24
Acceptance date: 2022-12-25
Online publication date: 2023-01-03
Publication date: 2023-06-14
Combustion Engines 2023,193(2), 24–28
KEYWORDS
TOPICS
ABSTRACT
Two-stroke engines are distinguished by the highest overall efficiency among all main engines. This is not only due to the low speed, and large piston stroke, but also to the high combustion temperature, which result in an increase in nitrogen oxides (NOx) emission. Technical solutions applied to bring main engines into compliance with current NOx emission standards set by the Tier III limits include the use of SCR and EGR systems, the implementation of the Otto cycle, and the application of liquified natural gas (LNG) as the low-emission fuel. Impact of the available Tier III-compliant technologies on the heat balance results is analysed using the example of the currently most popular dual-fuel main engines, i.e. WinGD X92DF and MAN G95ME-C10.5-GI. The possibilities of waste heat recovery in the electricity generation process and thereby improving the ship energy efficiency are discussed.
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