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Experimental investigation of the influences of shape and surface area on the EGR cooler efficiency

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Abstract

The cooled EGR system is one of the most effective techniques currently available for reducing NOx emissions. In this study, engine dynamometer experiments were performed to investigate the efficiencies of the shell and tube-type and stack-type EGR coolers. The results show that the heat exchange of the stack-type EGR cooler is much more effective than that of the shell and tube type because of the increased surface area and better mixing of the coolant flow, and also more PM is produced at low exhaust gas temperature than at high temperature.

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Abbreviations

A :

Area (m2)

C* :

Capacity ratio

C p :

Specific heat at constant pressure (J/kg K)

EGR:

Exhaust Gas Recirculation

EURO:

European emission standard

T c :

Coolant temperature (°C)

T g :

Gas temperature (°C)

NTU :

Number of transfer units

\( \dot{m}\) :

Mass flow rate (kg/s)

PM:

Particulate matter

\( \dot{Q} \) :

Average heat transfer rate (W)

\( \dot{Q}_{c} \) :

Coolant side heat transfer rate (W)

\( \dot{Q}_{g} \) :

Gas side heat transfer rate (W)

ε:

Effectiveness

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Acknowledgments

This work was supported by a 2010 Inje University research grant.

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Authors and Affiliations

  1. Department of Mechanical Engineering & High Safety Vehicle Core Technology Research Center, Inje University, 607 Obang-Dong, Gimhae-si, Gyongsangnam-do, 621-749, Korea

    Sanghoon Jang, Kapseung Choi & Hyungman Kim

  2. Graduate School of Hanyang University, Department of Mechanical Engineering, Hanyang University, 1271 Sa1-dong, Sangrok-gu, Gyeonggi-do, 426-791, Korea

    Sangki Park

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  1. Sanghoon Jang
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  2. Sangki Park
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  3. Kapseung Choi
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  4. Hyungman Kim
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Correspondence to Hyungman Kim.

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Jang, S., Park, S., Choi, K. et al. Experimental investigation of the influences of shape and surface area on the EGR cooler efficiency. Heat Mass Transfer 47, 621–628 (2011). https://doi.org/10.1007/s00231-010-0754-8

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  • DOI: https://doi.org/10.1007/s00231-010-0754-8

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