NOx emission from a two-stroke ship engine. Part 1: Modeling aspect

Kowalski, Jerzy; Tarełko, W.

doi:10.1016/j.applthermaleng.2008.06.032

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…The basis of the model is the straight-line, steady-state Gaussian plume equation (Petraitis 2010;Kowalski, Tarelko 2009). ISC-AER-MOD View is a complete and powerful Windows air dispersion modelling system which seamlessly incorporates three models into one interface: ISCST3, AERMOD and ISC-PRIME.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Noₓ Emission and Dispersion From Marine Ships in Klaipeda Sea Port

Abrutytė

Žukauskaitė

Mickevičienė

et al. 2014

Journal of Environmental Engineering and Landscape Management

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Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using laboratory selected bacterial strains as inoculum, biostimulation with molasses and cabbage leaf extract, and phytoremediation using rye and blue fenugreek to study the effect of these treatments on TNT removal and changes in soil microbial community responsible for contaminant degradation. Chemical analyses revealed significant decreases in TNT concentrations, including reduction of some of the TNT to its amino derivates during the 28-day tests. The combination of bioaugmentation-biostimulation approach coupled with rye cultivation had the most profound effect on TNT degradation. Although plants enhanced the total microbial community abundance, blue fenugreek cultivation did not significantly affect the TNT degradation rate. The results from molecular analyses suggested the survival and elevation of the introduced bacterial strains throughout the experiment. Reference to this paper should be made as follows: Nõ lvak, H.; Truu, J.; Limane, B.; Truu, M.; Cepurnieks, G.; Bartkevičs, V.; Juhanson, J.; Muter, O. 2013. Microbial community changes in TNT spiked soil bioremediation trial using biostimulation, phytoremediation and bioaugmentation, Journal of Environmental Engineering and Landscape Management 21(3): 153Á162. http://dx.

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Section: Methodsmentioning

confidence: 99%

Evaluation of Noₓ Emission and Dispersion From Marine Ships in Klaipeda Sea Port

Abrutytė

Žukauskaitė

Mickevičienė

et al. 2014

Journal of Environmental Engineering and Landscape Management

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“…Proces spalania zobrazowany jest prostą funkcją wywiązywania się ciepła. Modele takie mogą posłużyć miedzy innymi do analizy procesu spalania w oparciu o zmierzone przebiegi wartości ciśnienia w cylindrze [2], jako narzędzie do obliczenia temperatury gazów wylotowych [3], czasu spalania [4] czy średniej temperatury w cylindrze [5]. Na modele tego typu składa się prosty zapis matematyczny funkcji wywiązywania się ciepła podczas procesu spalania oraz politropowe sprężanie powietrza przed procesem spalania i politropowe rozprężanie po okresie spalania.…”

Section: Modele Bezwymiaroweunclassified

Overview of combustion process models in a cylinder of piston engine

Cuper-Przybylska

2018

atest

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The article presents an overview of models used to calculate combustion process parameters in piston engines. One of the applied techniques is modelling based on the mathematical description of physical phenomena. The level of complexity of such a description depends, however, on the purpose of the model, the efficiency of calculations and the possibility of obtaining reliable measurement data. The paper presents various methods of modelling phenomena occurring in the cylinder of a Diesel engine. Presented are assumptions and effects of modelling using models from 0-dimensional and single-zone to complex 3-dimensional models, describing the phenomena of turbulent mass movements using computer fluid mechanics.

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“…Hybrid propulsion solutions and their impact on emissions have also reached the great attention of scholars [33]. Last but not least, it should be mentioned that the accurate measurement of the gas composition has also assisted to improve the models and better setting up their parameters [34,35].…”

Section: Introductionmentioning

confidence: 99%

Negative impact of constant RPM control strategy on ship NOx emission in waves

Ghaemi

Zeraatgar

2022

Int J Energy Environ Eng

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In severe wave conditions, the ship propulsion system is loaded with high fluctuations due to external disturbances. The highly fluctuating loads enforce radical changes in the main engine torque, which in turn demands variation of the fuel rate injected into the cylinders if a constant rotational speed strategy is applied. Therefore, the temperature of gases varies to a large extent during the combustion process in the cylinders. The emitted NOx is a function of this highly fluctuating temperature. The main goal of this study is to investigate NOx emission under the aforementioned conditions when a usual constant RPM control strategy is applied in waves similar to the calm water condition. The paper presents a mathematical model of the whole system, which is applied to a selected ship both in regular waves and in calm water conditions. The results show that the sea waves, in comparison with the calm water condition, can radically increase the emitted NOx under the constant rotational speed strategy. This change can reach even 1014 times more, averagely. The results also show that the higher the wave height the higher the emitted NOx. It is concluded that the control strategy of keeping the engine rotational speed in waves at a constant level is the most important reason for the significantly increased NOx emission in waves in comparison with the calm water condition.

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NOx emission from a two-stroke ship engine. Part 1: Modeling aspect

Cited by 18 publications

References 34 publications

Evaluation of Noₓ Emission and Dispersion From Marine Ships in Klaipeda Sea Port

Evaluation of Noₓ Emission and Dispersion From Marine Ships in Klaipeda Sea Port

Overview of combustion process models in a cylinder of piston engine

Negative impact of constant RPM control strategy on ship NOx emission in waves

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