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

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

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

20 引用 (Scopus)

摘要

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.

源语言英语
页(从-至)800-812
页数13
期刊Energy
82
DOI
出版状态已出版 - 15 3月 2015
已对外发布

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Wang, E., Zhang, H., Fan, B., Ouyang, M., Yang, K., Yang, F., Li, X., & Wang, Z. (2015). 3D numerical analysis of exhaust flow inside a fin-and-tube evaporator used in engine waste heat recovery. Energy, 82, 800-812. https://doi.org/10.1016/j.energy.2015.01.091