Study on Electrostatic Precipitator for Diesel Exhaust Gas - Composition and Electrical Resistivity of Marine Diesel Exhaust Particulates

Abstract The aim of the present paper is to develop a computational fluid dynamics (CFD) analysis to study the combustion process in a four-stroke marine diesel engine, the Wartsila 6L 46. The motivation comes from the importance of emissions from marine engines in the global emissions, particularly for nitrogen oxides (NOx) and sulfur oxides (SOx). The pressure and temperature fields were obtained, as well as the exhaust gas composition. In order to validate this work, the numerical results were satisfactory compared with experimental ones, which indicates that this model is accurate enough to reproduce the fluid pattern inside the cylinder during the combustion process. Accordingly, the aim of future works is to use this numerical procedure to optimize the performance and reduce the emissions of the new marine engine designs.

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The effects of Electrostatic Precipitator in EGR system on the combustion and exhaust gas of marine diesel engines

Journal of Marine Engineering & Technology ◽

10.1080/20464177.2007.11020196 ◽

2007 ◽

Vol 6 (1) ◽

pp. 3-9

Author(s):

I Made Ariana ◽

Hirotsugu Fujita ◽

Osami Nishida ◽

Wataru Harano

Keyword(s):

Diesel Engines ◽

Electrostatic Precipitator ◽

Exhaust Gas ◽

Marine Diesel

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Diesel Exhaust Odor Its Evaluation and Relation to Exhaust Gas Composition

10.4271/570050 ◽

1957 ◽

Cited By ~ 8

Author(s):

F. G. Rounds ◽

H. W. Pearsall

Keyword(s):

Diesel Exhaust ◽

Exhaust Gas ◽

Gas Composition

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An Experimental Study of Emission and Combustion Characteristics of Marine Diesel Engine with Fuel Injector Malfunctions

Polish Maritime Research ◽

10.1515/pomr-2016-0011 ◽

2016 ◽

Vol 23 (1) ◽

pp. 77-84 ◽

Cited By ~ 3

Author(s):

Jerzy Kowalski

Keyword(s):

Diesel Engine ◽

Fuel Injection ◽

Direct Injection ◽

Technical Condition ◽

Exhaust Gas ◽

Gas Composition ◽

Fuel Injector ◽

Opening Pressure ◽

Simulated Fuel ◽

Marine Diesel

Abstract The presented paper shows the results of the laboratory study on the relation between chosen malfunctions of a fuel injector and composition of exhaust gas from the marine engine. The object of research is a marine 3-cylinder, four-stroke, direct injection diesel engine with an intercooler system. The engine was loaded with a generator and supercharged. The generator was electrically connected to the water resistance. The engine operated with a load between 50 kW and 250 kW at a constant speed. The engine load and speed, parameters of the turbocharger, systems of cooling, fuelling, lubricating and air exchange, were measured. Fuel injection and combustion pressures in all cylinders of the engine were also recorded. Exhaust gas composition was recorded by using a electrochemical gas analyzer. Air pressure, temperature and humidity were also recorded. Emission characteristics of the engine were calculated according to ISO 8178 standard regulations. During the study the engine operated at the technical condition recognized as „working properly” and with simulated fuel injector malfunctions. Simulation of malfunctions consisted in the increasing and decreasing of fuel injector static opening pressure, decalibration of fuel injector holes and clogging 2 neighboring of 9 fuel injector holes on one of 3 engine cylinders.

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Prospects for the use of dry carbamide in diesel exhaust gas aftertreatment systems

Traktory i sel'hozmashiny ◽

10.31992/0321-4443-2019-6-3-14 ◽

2019 ◽

pp. 3-14

Author(s):

V.N. Kaminskij ◽

◽

G.G. Nadarejshvili ◽

V.I. Panchishnyj ◽

R.M. Zagredinov ◽

...

Keyword(s):

Diesel Exhaust ◽

Exhaust Gas ◽

Exhaust Gas Aftertreatment ◽

Aftertreatment Systems

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A New Calculation Approach to the Energy Balance of a Gas Turbine Including a Study of the Impact of the Uncertainty of Measured Parameters

Volume 5: Turbo Expo 2005 ◽

10.1115/gt2005-68430 ◽

2005 ◽

Cited By ~ 1

Author(s):

Helmer G. Andersen ◽

Pen-Chung Chen

Keyword(s):

Energy Balance ◽

Gas Turbine ◽

Control Volume ◽

Ambient Air ◽

Energy Balance Equation ◽

Inlet Temperature ◽

Exhaust Gas ◽

Gas Composition ◽

Intake Flow ◽

The Impact

Computing the solution to the energy balance around a gas turbine in order to calculate the intake mass flow and the turbine inlet temperature requires several iterations. This makes hand calculations very difficult and, depending on the software used, even causes significant calculation times on PCs. While this may not seem all that important considering the power of today’s personal computers, the approach described in this paper presents a new way of looking at the gas turbine process and the resulting simplifications in the calculations. This paper offers a new approach to compute the energy balance around a gas turbine. The energy balance requires that all energy flows going into and out of the control volume be accounted for. The difficulty of the energy balance equation around a gas turbine lies in the fact that the exhaust gas composition is unknown as long as the intake flow is unknown. Thus, a composition needs to be assumed when computing the exhaust gas enthalpy. This allows the calculation of the intake flow, which in turn provides a new exhaust gas composition, and so forth. By viewing the exhaust gas as a flow consisting of ambient air and combusted fuel, the described iteration can be avoided. The study presents the formulation of the energy balance applying this approach and looks at the accuracy of the result as a function of the inaccuracy of the input parameters. Furthermore, solutions of the energy balance are presented for various process scenarios, and the impact of the uncertainty of key process parameter is analyzed.

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