engine emissions Articles | Environmental XPRT

Experimental method for marine engine’s emissions analysis

Abstract The world is considering various solutions to reduce exhaust emissions, the use of alternative fuels and the development of more efficient marine engines. IMO the company gave guidance for future borders of individual exhaust components, taking into account a variety of applications and conditions for the operation of marine engines. Engine manufacturers have been forced to ...

Mar. 1, 2016

By ECO Physics AG

Entropy approach for mitigation of environmental aviation impact and airport capacity increase

The implementation of the operational procedures to reduce aircraft noise and engine emission in the airport vicinity was under consideration in the paper. Emphasis was put on optimal aircraft operational procedures for noise and emission reduction taking into account interrelations of aircraft noise and engine emission. The task of minimising of aircraft noise impact and engine emission ...

Oct. 28, 2014

By Inderscience Publishers

NO x emission model of turbofan engine

During last decade a lot of investigations also focused on the evaluation of aircraft engine impact on local and regional air quality in the vicinity of the airport. The emission inventory of aircraft engines are usually calculated on the basis of certificated emission indexes, which is provided by the engine manufacturer and reported in the database of ICAO. The certificated emission indices ...

Jun. 27, 2014

By Inderscience Publishers

Emission behaviour of modern heavy duty vehicles in real world driving

Within a national and two international research projects, a vehicle emission model was developed, which calculates emissions in real world driving from the engine emission maps by simulating engine power and engine speed. Influences of transient load changes on the emission level are taken into consideration by special functions. Model parameters are gained from a common measurement protocol on ...

Oct. 28, 2004

By Inderscience Publishers

Advice on choosing 2010 compatible specs for heavy haulers

Heavy haulers that transport loads above 120,000 pounds gross combination weight (GCW) must carefully specify their trucks for both durability and power. An over-spec’d truck may reduce fuel mileage and increase acquisition costs, while an under spec’d truck may not be sufficient to move the load, or may increase maintenance costs. The challenge is to achieve the right balance between ...

Oct. 1, 2010

By Waste Advantage Magazine

A method to extend flamelet manifolds for prediction of NOx and long time scale species with tabulated chemistry

Numerical simulation is currently used to help design low NOx devices for aircraft engines. In order to improve the prediction of pollutant species, combustion models based on tabulated chemistry have been commonly used in recent years. However, the short time scales of usual flamelet manifolds can lead to errors concerning the NO prediction in post flame area, as shown in this paper. Thus, a new ...

Oct. 28, 2014

By Inderscience Publishers

Comparative assessment of injection, combustion, performance and emission characteristics of a diesel engine for biodiesel–diesel blends

The effects of different percentage of biodiesel diesel blends on injection, combustion, performance and emission characteristics of a constant speed diesel engine are analysed. The dynamic injection timing advanced with all blends. The in–line pressure and in–cylinder injection duration increased for the biodiesel blends in order to maintain same power output. The premixed combustion and total ...

Oct. 8, 2012

By Inderscience Publishers

Impact of ambient air temperature and injection timing on reduction of engine out emissions of DI diesel engine operating under the influence of oxygen enriched hydrogen gas

The present experimental work is a study of the impact of ambient air temperature and the injection timing of diesel fuel on reduction of engine–out emissions of DI diesel engine, operating under the influence of oxygen enriched hydrogen gas. Here the oxygen enriched hydrogen gas was produced by the process of water electrolysis. The produced gas was aspirated into the combustion process of ...

Jan. 20, 2015

By Inderscience Publishers

New engines: Time to clear the air

In response to new federal emission standards that went into effect Jan. 1, 2010 in the U.S. and Canada, engine manufacturers selected one of two choices to achieve a reduction in emissions of oxides of nitrogen (NOx). They either provide an in-cylinder approach through increased exhaust gas recirculation (EGR) only, or an engine aftertreatment approach using selective catalytic reduction (SCR) ...

Jun. 1, 2011

By Waste Advantage Magazine

The comparative analysis of diesel engine combustion and emission parameters fuelled with palm oil methyl esters and its diesel blends

In this work, the combustion and emission characteristics of a direct injection compression ignition engine fuelled with diesel-Palm Oil Methyl Ester (POME) blends are investigated. This study shows that the ignition delay decreases with increase in the POME addition. The maximum rate of pressure rise and maximum rate of heat release decreases with increase in POME addition at all loads. As the ...

Mar. 4, 2009

By Inderscience Publishers

Characterising emissions from private passenger vehicles using engine operating patterns

A method to simulate emissions factors using frequency distribution plots of engine speed and engine load is proposed. The distribution plots and corresponding emissions factors were developed from speed time series' of real-world driving cycles and physical properties of a range of private passenger vehicles tested at the EMPA. Emissions factors were estimated for a set of simultaneously ...

Jan. 3, 2011

By Inderscience Publishers

Oxidation Catalysts for BTC Pipeline

Description Eighteen (18) compressors, powered by 7600 hp Wartsila engines. The compressors move oil from the Caspian Sea to the Mediterranean Sea in the Turkish portion of the Baku-Tbilissi-Ceyhan (BTC) pipeline. Challenge Engine-out emissions for this major pipeline project were to meet the World Bank standards. The design target called for an oxidation catalyst to reduce ...

Sep. 11, 2006

By DCL International Inc.

Federal PSD/Title V Stationary Source Permitting Exclusion of Nonroad Engines

The PSD and Title V programs derive their applicability based on the aggregate air emissions from on-site equipment at each facility. Many railyards operate small combustion equipment such as gasoline-powered welders, compressors, and generators. These units may qualify as nonroad engines. Air emissions from nonroad engines need not be included in a facility’s aggregate air emissions when ...

Mar. 10, 2004

By Trinity Consultants

Exergy analysis of combustion characteristics and NOx emissions of a dual–fuel engine

The combustion characteristics and NOx emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NOx emissions are well predicted by the present model. Parametric study ...

Jun. 26, 2012

By Inderscience Publishers

`Federal PSD/Title V Stationary Source Permitting Exclusion of Nonroad Engines,` presented at the 2004 Railroad Environmental Conference

Abstract The PSD and Title V programs derive their applicability based on the aggregate air emissions from on-site equipment at each facility. Many railyards operate small combustion equipment such as gasoline-powered welders, compressors, and generators. These units may qualify as nonroad engines. Air emissions from nonroad engines need not be included in a facility's aggregate air emissions ...

Oct. 3, 2004

By Trinity Consultants

Multi response optimisation in emission control of CI engine fuelled with crude rice bran oil blend

In the present work, high free fatty acid (FFA) crude rice bran oil (CRBO) blend was tested in a stationary CI engine and investigation was focused to reduce NOx emission than diesel with lesser smoke density. Combustion process was modified by varying the factors namely fuel injection timing, percentage EGR and fuel injection pressure in a combination suggested by Taguchi's L9 orthogonal array. ...

Dec. 21, 2011

By Inderscience Publishers

Assessing the impact of particulate matter sources in the Milan urban area

The Chemical Mass Balance (CMB) receptor model of the US-EPA was applied to PM10 data obtained during a field study performed in the Milan urban area, including daily average concentrations, element and ion concentrations. Two chemical fingerprints were estimated to characterise total traffic emissions and diesel engine exhaust emissions. Four main source groups were identified: road traffic, ...

Jul. 18, 2005

By Inderscience Publishers

Static and dynamic instantaneous emission modelling

Emission models can be categorised into three categories: average speed models; traffic situation models, used at macro-scale or meso-scale level (national, regional, city level); and instantaneous (modal) models, useful at micro-scale level (street, vehicle level). To improve the existing instantaneous emission models, some preconditions must be fulfilled: the emission signals should be measured ...

Oct. 28, 2004

By Inderscience Publishers

Engine emissions analyzer further improves Intertek’s emissions testing capability - Case study

An advanced FTIR analyser installed at Intertek’s engine test facility in Milton Keynes is enabling engineers to improve the quality of their tests on the gaseous components of engine exhaust emissions. The gas analyser manufactured by Gasmet Technologies and installed by their UK subsidiary, Quantitech, measures multiple organic and inorganic components simultaneously from a large ...

Sep. 9, 2016

By Gasmet Technologies Oy

Radiation spectra of surface

The paper contributes to the theory of thermal radiation. In addition to the common energy spectrum of radiating surfaces, the entropic and exergetic spectrum of the perfectly black or perfectly grey surfaces is proposed. Also, besides the traditional surface emissivity, called in the considerations the energetic emissivity, the entropic and exergetic emissivities are introduced. The theoretical ...

Dec. 2, 2009

By Inderscience Publishers

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