Egr

AA PRESENTATION PRESENTATION

ONON ENVIRONMENTAL ENVIRONMENTAL

PROTECTIONPROTECTION

Guided by:Prof. G.K Biswas

Prepared By:G. Ravindra MurtyR.I.T.E.E Raipur (C.G.)

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(EXHAUST GAS RECIRCULATION (EXHAUST GAS RECIRCULATION SYSTEMSYSTEM)

INTRODUCTIONINTRODUCTION According to EPA six common air pollutants are:

1. Ozone2. Particulate Matters3. Carbon Monoxides4. Sulfur Dioxide5. Lead6. Nitrogen Dioxide

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• NOx -What is it? Where does it come from?

• NOx is a generic term for mono-nitrogen oxides (NO and NO2).

• Major sources are diesel engines.

• NOx formation is depends upon temperature (i.e. 2000k).

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NOx - Health and Environmental Impacts.

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NOx

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Res. Areas Ind. Areas

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NOx levels: rising steadilyNOx levels: rising steadily

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HOW TO REDUCE NOx EMISSION IN DIESEL ENGINES HOW TO REDUCE NOx EMISSION IN DIESEL ENGINES

• NOx are formed when temperatures in the combustion chamber get too hot (2000 k).

• In diesel engines NOx formation can be reduced by:

1.Late injection of fuel.2.Enriching A/F ratio. 3.Recirculating some exhaust gas. (i.e. EGR system)

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EXHAUST GAS RECIRCULATION SYSTEM (EGR) (1)EXHAUST GAS RECIRCULATION SYSTEM (EGR) (1)

Working of EGR system :

EGR is a useful technique for reducing NOx formation in the combustion chamber.

EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders.

In C.I. Engines EGR :

1. Increased ignition delay.

2. Increased heat capacity.

3. Dilution of combustion mixture (A/F Mixture).

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EXHAUST GAS RECIRCULATION SYSTEM (EGR) (2)EXHAUST GAS RECIRCULATION SYSTEM (EGR) (2)

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CLASSIFICATION OF EGR SYSTEMCLASSIFICATION OF EGR SYSTEM

Based on operating condition: 1. High EGR flow. 2. Low EGR flow. 3. NO EGR flow.

Based on temperature : 1. Hot EGR. 2. Fully cooled EGR. 3. Partly cooled EGR.

Based on Pressure : 1. Low pressure route system. 2. High pressure route system.

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Ludhiana

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Kanpur

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Alwar

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Solapur

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RSPM Annual average concentration during 2005 in

India (micrograms/m3)

Delhi

CONCLUSIONCONCLUSION

Thermal efficiency of the engine are not affected significantly by EGR.

Use of EGR technology to treat diesel exhaust shows promise for meeting strict 2010 EPA requirements. Engines using EGR system could Significantly reduce NOx gases.

The increase in particulate matter emissions due to EGR can be taken care by employing particulate traps and adequate regeneration techniques.

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Would You Rather PutA Filter on Your CarOr Your Child?

REFERENCESREFERENCES

1) Baert R S G, Beckman D E, Veen A 1999 Efficient EGR technology for future HD diesel engine Emission targets.

2) Understanding Exhaust Gas Recirculation Systems by Henry Guzman.

3) Heywood, John B., "Internal Combustion Engine Fundamentals," McGraw Hill, 1988

4) http://en.wikipedia.org/wiki/Exhaust_gas_recirculation.

5) http://www.fordscorpio.co.uk/egr.htm

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THANKING YOU

- G. Ravindra Murty

Contact- [email protected]

Egr

Education

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