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首页> 外文期刊>International Journal of Heat and Mass Transfer >Mathematical modelling of turbulent flow for flue gas-air Chevron type plate heat exchangers
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Mathematical modelling of turbulent flow for flue gas-air Chevron type plate heat exchangers

机译：烟气-雪佛龙板式换热器湍流数学模型

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摘要

A mathematical model of a plate recuperative heat exchanger was developed in order to recover energy for refinery flue gases and preheating of the inlet air of a combustion chamber. Two-dimensional, compressible and turbulent flow conditions were undertaken. After the model verified, the results revealed that, replacing flat plate to Chevron-type plates led to major changes through the velocity vectors into the angular and eddy forms. Moreover, as the Chevron angle increased, more pronounced changes observed in the velocity vectors. Also it was revealed that, a five folds enhancement in the Reynolds number led to increasing of the corresponding Nusselt number and the pressure drop while lowering the Fanning friction factor. The bigger angle of the Chevron type plates resulted in 18% enhancement in the output air temperature as well as; an increase in the resulting flue gas pressure drop of 63% in comparison with the plate heat exchanger.
机译：开发了板式换热器热交换器的数学模型，以回收炼厂烟道气和燃烧室进气的预热能量。进行了二维，可压缩和湍流条件。经过模型验证后，结果表明，将平板替换为雪佛龙型平板会导致速度矢量发生重大变化，变为角和涡流形式。此外，随着人字形角度的增加，在速度矢量中观察到了更明显的变化。另外还发现，雷诺数增加五倍导致相应的努塞尔数和压降增加，同时降低了范宁摩擦系数。雪佛龙型板的较大角度使输出空气温度提高了18％。与板式换热器相比，烟道气压降增加了63％。

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  • 作者

    Leila Vafajoo; Karim Moradifar; S. Masoud Hosseini; B.H. Salman;

  • 作者单位

    Department of Chemical and Environmental Engineering, Faculty of Engineering, Ⅰ. Azad University, South Tehran Branch, Tehran, Iran;

    Department of Chemical and Environmental Engineering, Faculty of Engineering, Ⅰ. Azad University, South Tehran Branch, Tehran, Iran;

    Department of Chemical and Environmental Engineering, Faculty of Engineering, Ⅰ. Azad University, South Tehran Branch, Tehran, Iran,Chemical in the Residue Fluidized Catalytic Cracking (RFCC) Unit, IKORC, Arak, Iran;

    Department of Mechanical Engineering, University of Nevada, Las Vegas, NV 89154, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mathematical modeling; Flue gas; Energy recovery; Recuperative heat exchanger;

    机译：数学建模;烟气能量恢复;换热器;

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