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首页> 外文期刊>Heat transfer >Oil fouling in double-pipe heat exchanger under liquid-liquid dispersion and the influence of copper oxide nanofluid
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Oil fouling in double-pipe heat exchanger under liquid-liquid dispersion and the influence of copper oxide nanofluid

机译：液体液体分散下双管式热交换器的石油污垢及氧化铜氧化铜氧化铜的影响

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摘要

Dispersions of oil in water are encountered in a variety of industrial processes leading to a reduction in the performance of the heat exchangers when thermally treating such two phase fluids. This reduction is mainly due to changes in the thermal and hydrodynamical behavior of the two phase fluid. In the present work, an experimental investigation was performed to study the effects of light oil fouling on the heat transfer coefficient in a double-pipe heat exchanger under turbulent flow conditions. The effects of different operating conditions on the fouling rate were investigated including: hot fluid Reynolds number (the dispersion), cold fluid Reynolds number, and time. The oil fouling rate was analyzed by determining the growth of fouling resistance with time and through pressure drop measurements. The influence of copper oxide (CuO) nanofluid on the fouling rate in the dispersion was also determined. It was found that the presence of dispersed oil causes a reduction in heat transfer coefficient by percentages depending on the Reynolds number of both cold and hot fluids and the concentration of oil. In addition, the time history of fouling resistance exhibited different trends with the flow rates of both fluids and its trend was influenced appreciably by the presence of CuO nanofluid.
机译：在水中的各种工业过程中遇到了水中的水分散，导致热交换器在热处理这种两个相流体时的性能降低。这种减少主要是由于两相流体的热和流体动力学行为的变化。在本作工作中，进行实验研究，以研究轻油污染对湍流条件下双管热交换器中的传热系数的影响。研究了不同操作条件对污垢率的影响，包括：热流体雷诺数（分散体），冷流体雷诺数和时间。通过确定污垢抗性的增长和通过压降测量来分析石油污染率。还测定了氧化铜（CUO）纳米流体对分散体中污垢速率的影响。发现分散油的存在导致传热系数的减少，取决于冷热流体的雷诺数和油的浓度。此外，污垢抗性的时间历史表现出不同趋势的流体的流速，其趋势通过CuO纳米流体的存在而显着影响。

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