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3D numerical analysis of exhaust flow inside a fin-and-tube evaporator used in engine waste heat recovery

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  • Wang, Enhua
  • Zhang, Hongguang
  • Fan, Boyuan
  • Ouyang, Minggao
  • Yang, Kai
  • Yang, Fuyuan
  • Li, Xiaojuan
  • Wang, Zhen

Abstract

A fin-and-tube evaporator can be used for an ORC (organic Rankine cycle) to collect waste heat of the exhaust gas of an internal combustion engine. In this paper, the thermal-hydraulic characteristics of an ORC evaporator are analyzed using a CFD method. A 3D numerical model is derived from an engineering diagram of the fin-and-tube evaporator, and the boundary conditions are specified according to the measured data obtained by the engine test. The simulation results show that the exhaust on the shell side flows primarily parallel with the fin layers. Alternating high and low temperatures appear on the middle planes of the adjacent tube rows. The shapes of the front-end and the rear-end parts connecting the main body to the exhaust pipes are important factors on the flow field. The maximum exhaust pressure decrease in the fin-and-tube evaporator is significantly less than the backpressure limit required by the engine exhaust pipe. The simulation results are verified by an engine experiment, and there exists a correlation between the numerical results and the actual heat transfer process.

Suggested Citation

  • Wang, Enhua & Zhang, Hongguang & Fan, Boyuan & Ouyang, Minggao & Yang, Kai & Yang, Fuyuan & Li, Xiaojuan & Wang, Zhen, 2015. "3D numerical analysis of exhaust flow inside a fin-and-tube evaporator used in engine waste heat recovery," Energy, Elsevier, vol. 82(C), pages 800-812.
  • Handle: RePEc:eee:energy:v:82:y:2015:i:c:p:800-812
    DOI: 10.1016/j.energy.2015.01.091
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    Cited by:

    1. Chen Bei & Hongguang Zhang & Fubin Yang & Songsong Song & Enhua Wang & Hao Liu & Ying Chang & Hongjin Wang & Kai Yang, 2015. "Performance Analysis of an Evaporator for a Diesel Engine–Organic Rankine Cycle (ORC) Combined System and Influence of Pressure Drop on the Diesel Engine Operating Characteristics," Energies, MDPI, vol. 8(6), pages 1-28, June.
    2. Yang, Fubin & Zhang, Hongguang & Yu, Zhibin & Wang, Enhua & Meng, Fanxiao & Liu, Hongda & Wang, Jingfu, 2017. "Parametric optimization and heat transfer analysis of a dual loop ORC (organic Rankine cycle) system for CNG engine waste heat recovery," Energy, Elsevier, vol. 118(C), pages 753-775.
    3. Songsong Song & Hongguang Zhang & Rui Zhao & Fanxiao Meng & Hongda Liu & Jingfu Wang & Baofeng Yao, 2017. "Simulation and Performance Analysis of Organic Rankine Systems for Stationary Compressed Natural Gas Engine," Energies, MDPI, vol. 10(4), pages 1-23, April.
    4. Yang, Fubin & Zhang, Hongguang & Song, Songsong & Bei, Chen & Wang, Hongjin & Wang, Enhua, 2015. "Thermoeconomic multi-objective optimization of an organic Rankine cycle for exhaust waste heat recovery of a diesel engine," Energy, Elsevier, vol. 93(P2), pages 2208-2228.
    5. Ravi, Rajesh & Pachamuthu, Senthilkumar & Kasinathan, Padmanathan, 2020. "Computational and experimental investigation on effective utilization of waste heat from diesel engine exhaust using a fin protracted heat exchanger," Energy, Elsevier, vol. 200(C).

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