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Analysis of Soot Deposition Effects on Exhaust Heat Exchanger for Waste Heat Recovery System

Author

Listed:
  • Tianyu Chen

    (Marine Design & Research Institute of China, Shanghai 200011, China)

  • Hanqing Li

    (Marine Design & Research Institute of China, Shanghai 200011, China)

  • Yuzeng Wu

    (Marine Design & Research Institute of China, Shanghai 200011, China)

  • Jiaqi Che

    (Marine Design & Research Institute of China, Shanghai 200011, China)

  • Mingming Fang

    (Marine Design & Research Institute of China, Shanghai 200011, China)

  • Xupeng Li

    (Marine Design & Research Institute of China, Shanghai 200011, China)

Abstract

This study investigates the thermal–hydraulic behavior and deposition characteristics of a shell and tube exhaust heat exchanger using a CFD-based predictive model of soot deposition. Firstly, considering the influences of thermophoretic, wall shear stress, and other deposition and removal mechanisms, a predictive model is developed for long-term performance of heat exchangers under soot deposition. Then, the variations in exhaust heat exchanger performance during a 4 h deposition period are simulated based on the model. Subsequently, the variation of deposition distribution and different deposition velocities are also evaluated. Finally, an analysis of the long-term performance of the exhaust heat exchanger under varying gas velocities and temperature gradients is conducted, revealing the performance variations under all engine-operating conditions. Results show that the deterioration in normalized relative j / f 1 / 2 varies from 5.26% to 24.91% under different work conditions, and the exhaust heat exchanger with high gas velocity and low temperature gradient exhibits optimal long-term performance.

Suggested Citation

  • Tianyu Chen & Hanqing Li & Yuzeng Wu & Jiaqi Che & Mingming Fang & Xupeng Li, 2024. "Analysis of Soot Deposition Effects on Exhaust Heat Exchanger for Waste Heat Recovery System," Energies, MDPI, vol. 17(17), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4259-:d:1464136
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    References listed on IDEAS

    as
    1. Sangjun Park & Kyo Seung Lee & Jungsoo Park, 2018. "Parametric Study on EGR Cooler Fouling Mechanism Using Model Gas and Light-Duty Diesel Engine Exhaust Gas," Energies, MDPI, vol. 11(11), pages 1-10, November.
    2. Buhari Doğan & Oana M. Driha & Daniel Balsalobre Lorente & Umer Shahzad, 2021. "The mitigating effects of economic complexity and renewable energy on carbon emissions in developed countries," Sustainable Development, John Wiley & Sons, Ltd., vol. 29(1), pages 1-12, January.
    3. Pandiyarajan, V. & Chinna Pandian, M. & Malan, E. & Velraj, R. & Seeniraj, R.V., 2011. "Experimental investigation on heat recovery from diesel engine exhaust using finned shell and tube heat exchanger and thermal storage system," Applied Energy, Elsevier, vol. 88(1), pages 77-87, January.
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