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Turbine and exhaust ports thermal insulation impact on the engine efficiency and aftertreatment inlet temperature

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  • Luján, José Manuel
  • Serrano, José Ramon
  • Piqueras, Pedro
  • Diesel, Bárbara

Abstract

Worldwide emission regulations are driven the efforts of the automotive industry to meet challenging targets concerning pollution reduction. Nowadays, advances in exhaust aftertreatment systems are primarily required to achieve regulation requirements within the whole engine operating range. Nevertheless, flow parameters, such as the exhaust gas temperature, must be also addressed. This makes engine calibration a fundamental step, but also leads to reconsider the passive design of the exhaust line as a way to improve the engine efficiency. Under this context, a study has been conducted to explore the benefits of heat losses limitation looking for aftertreatment inlet temperature increase at the same time fuel economy is improved. To do so, a baseline diesel engine has been modeled using a gas dynamic software taking special care of the heat transfer processes in the exhaust. The investigation covers the definition of different strategies for exhaust ports and turbine thermal insulation, which are evaluated in a representative range of steady-state operating conditions. As a first step, the theoretical limits and representative technology solutions are considered for each exhaust region. Then, a combination of the most promising strategies has been computed to provide a comprehensive database and analysis of the potential of passive exhaust heat losses control.

Suggested Citation

  • Luján, José Manuel & Serrano, José Ramon & Piqueras, Pedro & Diesel, Bárbara, 2019. "Turbine and exhaust ports thermal insulation impact on the engine efficiency and aftertreatment inlet temperature," Applied Energy, Elsevier, vol. 240(C), pages 409-423.
    • Handle: RePEc:eee:appene:v:240:y:2019:i:c:p:409-423
    DOI: 10.1016/j.apenergy.2019.02.043
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    References listed on IDEAS

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    Cited by:

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    2. Serrano, J.R. & Arnau, F.J. & Bares, P. & Gomez-Vilanova, A. & Garrido-Requena, J. & Luna-Blanca, M.J. & Contreras-Anguita, F.J., 2021. "Analysis of a novel concept of 2-stroke rod-less opposed pistons engine (2S-ROPE): Testing, modelling, and forward potential," Applied Energy, Elsevier, vol. 282(PA).
    3. Mohsen Mirzaeian & Simon Langridge, 2021. "Creating a Virtual Test Bed Using a Dynamic Engine Model with Integrated Controls to Support in-the-Loop Hardware and Software Optimization and Calibration," Energies, MDPI, vol. 14(3), pages 1-18, January.
    4. Zhao, Xiaohuan & Jiang, Jiang & Zuo, Hongyan & Jia, Guohai, 2023. "Soot combustion characteristics of oxygen concentration and regeneration temperature effect on continuous pulsation regeneration in diesel particulate filter for heavy-duty truck," Energy, Elsevier, vol. 264(C).
    5. Zhao, Xiaohuan & Zuo, Hongyan & Jia, Guohai, 2022. "Effect analysis on pressure sensitivity performance of diesel particulate filter for heavy-duty truck diesel engine by the nonlinear soot regeneration combustion pressure model," Energy, Elsevier, vol. 257(C).
    6. Beichuan Hong & Varun Venkataraman & Andreas Cronhjort, 2021. "Numerical Analysis of Engine Exhaust Flow Parameters for Resolving Pre-Turbine Pulsating Flow Enthalpy and Exergy," Energies, MDPI, vol. 14(19), pages 1-24, September.
    7. Sheng Yin & Jimin Ni & Houchuan Fan & Xiuyong Shi & Rong Huang, 2022. "A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve," Sustainability, MDPI, vol. 14(16), pages 1-18, August.

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