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U-Tube Assembly Heat Exchanger Performance Analysis Using Cyclic Iteration

机译:使用循环迭代的U型管组件换热器性能分析

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This article outlines a technique to predict the performance of the convection passes of pulverized coal boilers, where the heat exchangers are typically comprised of assemblies of U-tube elements. Therein a heat exchanger comprised of n U-tubes per assembly is modeled as 2n rows in the product gas flow direction, and the portions of the straight tubes making up each assembly are considered to be distinct passes in crossflow. It is assumed that in each pass the tube-side fluid is unmixed and the gas-side fluid is mixed, and likewise the gas-side fluid is mixed between passes. The model employs a straightforward approach to predict the performance of a single pass as a building block to predict the performance of the overall assembly.
机译:本文概述了一种预测粉煤锅炉对流通道性能的技术,其中热交换器通常由U型管元件的组件组成。其中,每个组件由n个U型管组成的换热器在产物气体流动方向上建模为2n行,构成每个组件的直管部分被认为是错流。假设在每个通道中不混合管侧流体而混合气体侧流体,并且同样在通道之间混合气体侧流体。该模型采用一种简单的方法来预测单次通过的性能,并将其作为预测整个装配体性能的基础。

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