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Mathematical Modeling of Cross-Flow Tube Heat Exchangers With a Complex Flow Arrangement

机译：错流管式换热器的数学模型

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摘要

The general principles of mathematical modeling of heat transfer in cross-flow tube heat exchangers with complex flow arrangements that allow the simulation of multipass heat exchangers with many tube rows are presented. The finite-volume method is used to solve the system of differential equations for temperature of the both fluids and the tube wall with appropriate boundary conditions. A numerical model of a multipass steam superheater with 12 passes is presented. The convection and radiation heat transfer on the flue gas side are accounted for. In addition, the deposit layer is assumed to cover the outer surface of the tubes. Comparing the computed and measured steam temperature increase over the entire superheater allows for determining the thermal resistance of the deposits layer on the outer surface of the superheater. The developed modeling technique can especially be used for modeling tube heat exchangers when detailed information on the tube wall temperature distribution is needed.
机译：提出了具有复杂流量布置的错流管式换热器中传热数学模型的一般原理，该模型可以模拟具有许多排管的多程换热器。在有限边界条件下，有限体积法用于求解流体和管壁温度的微分方程组。给出了具有12个通道的多通道蒸汽过热器的数值模型。考虑到烟气侧的对流和辐射热传递。另外，假设沉积层覆盖管的外表面。比较整个过热器的计算和测量的蒸汽温度升高，可以确定过热器外表面上沉积层的热阻。当需要有关管壁温度分布的详细信息时，开发的建模技术尤其可以用于对管式换热器建模。

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  • 来源
    《Heat Transfer Engineering》 |2014年第15期|1334-1343|共10页
  • 作者

    DAWID TALER; MARCIN TROJAN; JAN M. TALER;

  • 作者单位

    'Faculty of Environmental Engineering, Institute of Thermal Engineering and Air Protection, Cracow University of Technology, Cracow, Poland;

    Faculty of Mechanical Engineering, Institute of Power Plant Technology, Cracow University of Technology, Cracow, Poland;

    Faculty of Mechanical Engineering, Institute of Power Plant Technology, Cracow University of Technology, Al. Jana Pawla II 37, 31-864 Cracow, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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