Modeling the condensation of sulfuric acid and water on the cylinder liner of a large two-stroke marine diesel engine
| Autor: | Svend S. Eskildsen, Rasmus Faurskov Cordtz, Stefan Mayer, Jesper Schramm |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
020209 energy Ocean Engineering 02 engineering and technology Oceanography Combustion Diesel engine Cylinder (engine) law.invention Diesel fuel chemistry.chemical_compound law 0202 electrical engineering electronic engineering information engineering SDG 14 - Life Below Water H2O–H2SO4-condensation Liner corrosion Waste management Mechanical Engineering Condensation Two-stoke marine engine Sulfuric acid Fuel oil chemistry Chemical engineering Mechanics of Materials Sulfur trioxide Phenomenological modeling |
| Zdroj: | Cordtz, R F, Mayer, S, Eskildsen, S S & Schramm, J 2018, ' Modeling the condensation of sulfuric acid and water on the cylinder liner of a large two-stroke marine diesel engine ', Journal of Marine Science and Technology, vol. 23, no. 1, pp. 178–187 . https://doi.org/10.1007/s00773-017-0455-9 |
| ISSN: | 1437-8213 0948-4280 |
| DOI: | 10.1007/s00773-017-0455-9 |
| Popis: | Corrosive wear of cylinder liners in large two-stroke marine diesel engines that burn heavy fuel oil containing sulfur is coupled to the formation of gaseous sulfur trioxide (SO3) and subsequent combined condensation of sulfuric acid (H2SO4) and water (H2O) vapor. The present work seeks to address how fuel sulfur content, charge air humidity and liner temperature variations affects the deposition of water and sulfuric acid at low load operation. A phenomenological engine model is applied to simulate the formation of cylinder/bulk gas combustion products and dew points comply with H2O–H2SO4 vapor liquid equilibrium. By assuming homogenous cylinder gas mixtures condensation is modeled using a convective heat and mass transfer analogy combined with realistic liner temperature profiles. Condensation of water is significantly altered by the liner temperature and charge air humidity while sulfuric acid condensation (the order is a few mg per cylinder every cycle) is proportional to the fuel sulfur content. Condensation takes place primarily in the upper part of the cylinder liner where a reduction of the surface temperature or saturated charge air provides that the deposited acid can be highly diluted with water. |
| Databáze: | OpenAIRE |
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